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  • Mutation  (128)
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  • American Association for the Advancement of Science (AAAS)  (115)
  • Springer  (13)
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  • 2015-2019  (18)
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  • 1
    Publication Date: 2016-01-20
    Description: The final identity and functional properties of a neuron are specified by terminal differentiation genes, which are controlled by specific motifs in compact regulatory regions. To determine how these sequences integrate inputs from transcription factors that specify cell types, we compared the regulatory mechanism of Drosophila Rhodopsin genes that are expressed in subsets of photoreceptors to that of phototransduction genes that are expressed broadly, in all photoreceptors. Both sets of genes share an 11-base pair (bp) activator motif. Broadly expressed genes contain a palindromic version that mediates expression in all photoreceptors. In contrast, each Rhodopsin exhibits characteristic single-bp substitutions that break the symmetry of the palindrome and generate activator or repressor motifs critical for restricting expression to photoreceptor subsets. Sensory neuron subtypes can therefore evolve through single-bp changes in short regulatory motifs, allowing the discrimination of a wide spectrum of stimuli.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rister, Jens -- Razzaq, Ansa -- Boodram, Pamela -- Desai, Nisha -- Tsanis, Cleopatra -- Chen, Hongtao -- Jukam, David -- Desplan, Claude -- K99EY023995/EY/NEI NIH HHS/ -- R01 EY13010/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2015 Dec 4;350(6265):1258-61. doi: 10.1126/science.aab3417.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Developmental Genetics, Department of Biology, New York University, 100 Washington Square East, New York, NY 10003-6688, USA. ; Center for Developmental Genetics, Department of Biology, New York University, 100 Washington Square East, New York, NY 10003-6688, USA. cd38@nyu.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26785491" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Pairing ; Drosophila Proteins/*genetics ; Drosophila melanogaster/genetics/growth & development ; *Gene Expression Regulation, Developmental ; Mutation ; Photoreceptor Cells, Invertebrate/*physiology ; Promoter Regions, Genetic/*genetics ; Rhodopsin/*genetics ; Transcription Factors/metabolism ; Vision, Ocular/*genetics
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2016-01-20
    Description: Congenital heart disease (CHD) patients have an increased prevalence of extracardiac congenital anomalies (CAs) and risk of neurodevelopmental disabilities (NDDs). Exome sequencing of 1213 CHD parent-offspring trios identified an excess of protein-damaging de novo mutations, especially in genes highly expressed in the developing heart and brain. These mutations accounted for 20% of patients with CHD, NDD, and CA but only 2% of patients with isolated CHD. Mutations altered genes involved in morphogenesis, chromatin modification, and transcriptional regulation, including multiple mutations in RBFOX2, a regulator of mRNA splicing. Genes mutated in other cohorts examined for NDD were enriched in CHD cases, particularly those with coexisting NDD. These findings reveal shared genetic contributions to CHD, NDD, and CA and provide opportunities for improved prognostic assessment and early therapeutic intervention in CHD patients.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Homsy, Jason -- Zaidi, Samir -- Shen, Yufeng -- Ware, James S -- Samocha, Kaitlin E -- Karczewski, Konrad J -- DePalma, Steven R -- McKean, David -- Wakimoto, Hiroko -- Gorham, Josh -- Jin, Sheng Chih -- Deanfield, John -- Giardini, Alessandro -- Porter, George A Jr -- Kim, Richard -- Bilguvar, Kaya -- Lopez-Giraldez, Francesc -- Tikhonova, Irina -- Mane, Shrikant -- Romano-Adesman, Angela -- Qi, Hongjian -- Vardarajan, Badri -- Ma, Lijiang -- Daly, Mark -- Roberts, Amy E -- Russell, Mark W -- Mital, Seema -- Newburger, Jane W -- Gaynor, J William -- Breitbart, Roger E -- Iossifov, Ivan -- Ronemus, Michael -- Sanders, Stephan J -- Kaltman, Jonathan R -- Seidman, Jonathan G -- Brueckner, Martina -- Gelb, Bruce D -- Goldmuntz, Elizabeth -- Lifton, Richard P -- Seidman, Christine E -- Chung, Wendy K -- T32 HL007208/HL/NHLBI NIH HHS/ -- Arthritis Research UK/United Kingdom -- British Heart Foundation/United Kingdom -- Department of Health/United Kingdom -- Howard Hughes Medical Institute/ -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2015 Dec 4;350(6265):1262-6. doi: 10.1126/science.aac9396.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Harvard Medical School, Boston, MA, USA. Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA. ; Department of Genetics, Yale University School of Medicine, New Haven, CT, USA. ; Departments of Systems Biology and Biomedical Informatics, Columbia University Medical Center, New York, NY, USA. ; Department of Genetics, Harvard Medical School, Boston, MA, USA. NIHR Cardiovascular Biomedical Research Unit at Royal Brompton & Harefield NHS Foundation and Trust and Imperial College London, London, UK. National Heart & Lung Institute, Imperial College London, London, UK. ; Department of Genetics, Harvard Medical School, Boston, MA, USA. Analytical and Translational Genetics Unit, Massachusetts General Hospital and Harvard Medical School, Boston MA, USA. ; Department of Genetics, Harvard Medical School, Boston, MA, USA. Howard Hughes Medical Institute, Harvard University, Boston, MA, USA. ; Department of Genetics, Harvard Medical School, Boston, MA, USA. ; Department of Cardiology, University College London and Great Ormond Street Hospital, London, UK. ; Department of Pediatrics, University of Rochester Medical Center, The School of Medicine and Dentistry, Rochester, NY, USA. ; Section of Cardiothoracic Surgery, University of Southern California Keck School of Medicine, Los Angeles, CA, USA. ; Department of Genetics, Yale University School of Medicine, New Haven, CT, USA. Yale Center for Genome Analysis, Yale University, New Haven, CT, USA. ; Yale Center for Genome Analysis, Yale University, New Haven, CT, USA. ; Steven and Alexandra Cohen Children's Medical Center of New York, New Hyde Park, NY, USA. ; Departments of Systems Biology and Biomedical Informatics, Columbia University Medical Center, New York, NY, USA. Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, USA. ; Department of Neurology, Columbia University Medical Center, New York, NY, USA. ; Department of Pediatrics, Columbia University Medical Center, New York, NY, USA. ; Department of Cardiology, Children's Hospital Boston, Boston, MA, USA. ; Division of Pediatric Cardiology, University of Michigan, Ann Arbor, MI, USA. ; Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada. ; Department of Cardiology, Boston Children's Hospital, Boston, MA, USA. ; Department of Pediatric Cardiac Surgery, The Children's Hospital of Philadelphia, Philadelphia, PA, USA. ; Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA. ; Department of Psychiatry, University of California San Francisco, San Francisco, CA, USA. ; Heart Development and Structural Diseases Branch, Division of Cardiovascular Sciences, NHLBI/NIH, Bethesda, MD, USA. ; Department of Genetics, Yale University School of Medicine, New Haven, CT, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu. ; Mindich Child Health and Development Institute and Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu. ; Department of Pediatrics, The Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia, PA, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu. ; Department of Genetics, Yale University School of Medicine, New Haven, CT, USA. Howard Hughes Medical Institute, Yale University, New Haven, CT, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu. ; Department of Genetics, Harvard Medical School, Boston, MA, USA. Howard Hughes Medical Institute, Harvard University, Boston, MA, USA. Cardiovascular Division, Brigham & Women's Hospital, Harvard University, Boston, MA, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu. ; Departments of Pediatrics and Medicine, Columbia University Medical Center, New York, NY, USA. bruce.gelb@mssm.edu goldmuntz@email.chop.edu martina.brueckner@yale.edu richard.lifton@yale.edu cseidman@genetics.med.harvard.edu wkc15@cumc.columbia.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26785492" target="_blank"〉PubMed〈/a〉
    Keywords: Brain/abnormalities/metabolism ; Child ; Congenital Abnormalities/genetics ; Exome/genetics ; Heart Defects, Congenital/*diagnosis/*genetics ; Humans ; Mutation ; Nervous System Malformations/*genetics ; Neurogenesis/*genetics ; Prognosis ; RNA Splicing/genetics ; RNA, Messenger/genetics ; RNA-Binding Proteins/genetics ; Repressor Proteins/genetics ; Transcription, Genetic
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  • 3
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2016-01-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alexandrov, Ludmil B -- New York, N.Y. -- Science. 2015 Dec 4;350(6265):1175. doi: 10.1126/science.aad7363.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Theoretical Biology and Biophysics (T-6), Los Alamos National Laboratory, Los Alamos, NM 87545, USA. lba@lanl.gov.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26785464" target="_blank"〉PubMed〈/a〉
    Keywords: *Computer Simulation ; DNA Mutational Analysis ; Genomics/*methods ; Humans ; *Models, Genetic ; *Mutagenesis ; Mutation ; Neoplasms/classification/*genetics/pathology
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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2016-01-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, Jon -- New York, N.Y. -- Science. 2015 Dec 4;350(6265):1186-7. doi: 10.1126/science.350.6265.1186.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26785474" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/genetics/physiology ; Caenorhabditis elegans Proteins/genetics/physiology ; Caloric Restriction ; Death ; Humans ; Hydra/genetics/physiology ; Longevity/genetics/*physiology ; Mice ; Mutation ; Phosphatidylinositol 3-Kinases/genetics/physiology
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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2016-01-20
    Description: Research into stem cells and aging aims to understand how stem cells maintain tissue health, what mechanisms ultimately lead to decline in stem cell function with age, and how the regenerative capacity of somatic stem cells can be enhanced to promote healthy aging. Here, we explore the effects of aging on stem cells in different tissues. Recent research has focused on the ways that genetic mutations, epigenetic changes, and the extrinsic environmental milieu influence stem cell functionality over time. We describe each of these three factors, the ways in which they interact, and how these interactions decrease stem cell health over time. We are optimistic that a better understanding of these changes will uncover potential strategies to enhance stem cell function and increase tissue resiliency into old age.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goodell, Margaret A -- Rando, Thomas A -- P01 AG036695/AG/NIA NIH HHS/ -- R01 AG047820/AG/NIA NIH HHS/ -- R01 AR062185/AR/NIAMS NIH HHS/ -- R37 AG023806/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2015 Dec 4;350(6265):1199-204. doi: 10.1126/science.aab3388.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Stem Cells and Regenerative Medicine Center, Center for Cell and Gene Therapy, and Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA. goodell@bcm.edu rando@stanford.edu. ; Glenn Center for the Biology of Aging and Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA 94305, USA, and Center for Regenerative Rehabilitation, Veterans Administration Palo Alto Health Care System, Palo Alto, CA 94304, USA. goodell@bcm.edu rando@stanford.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26785478" target="_blank"〉PubMed〈/a〉
    Keywords: Adult Stem Cells/*physiology ; Aging/*physiology ; Animals ; Cell Aging ; Epigenesis, Genetic ; Genetic Drift ; *Health ; Humans ; Mice ; Mutation ; Organ Specificity ; Selection, Genetic
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  • 6
    Publication Date: 2016-02-26
    Description: Hundreds of pathways for degradation converge at ubiquitin recognition by a proteasome. Here, we found that the five known proteasomal ubiquitin receptors in yeast are collectively nonessential for ubiquitin recognition and identified a sixth receptor, Rpn1. A site ( T1: ) in the Rpn1 toroid recognized ubiquitin and ubiquitin-like ( UBL: ) domains of substrate shuttling factors. T1 structures with monoubiquitin or lysine 48 diubiquitin show three neighboring outer helices engaging two ubiquitins. T1 contributes a distinct substrate-binding pathway with preference for lysine 48-linked chains. Proximal to T1 within the Rpn1 toroid is a second UBL-binding site ( T2: ) that assists in ubiquitin chain disassembly, by binding the UBL of deubiquitinating enzyme Ubp6. Thus, a two-site recognition domain intrinsic to the proteasome uses distinct ubiquitin-fold ligands to assemble substrates, shuttling factors, and a deubiquitinating enzyme.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shi, Yuan -- Chen, Xiang -- Elsasser, Suzanne -- Stocks, Bradley B -- Tian, Geng -- Lee, Byung-Hoon -- Shi, Yanhong -- Zhang, Naixia -- de Poot, Stefanie A H -- Tuebing, Fabian -- Sun, Shuangwu -- Vannoy, Jacob -- Tarasov, Sergey G -- Engen, John R -- Finley, Daniel -- Walters, Kylie J -- New York, N.Y. -- Science. 2016 Feb 19;351(6275). pii: aad9421. doi: 10.1126/science.aad9421.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA. ; Protein Processing Section, Structural Biophysics Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA. ; Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, USA. ; Protein Processing Section, Structural Biophysics Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA. Department of Analytical Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China. ; Department of Analytical Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China. ; Protein Processing Section, Structural Biophysics Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA. Linganore High School, Frederick, MD 21701, USA. ; Biophysics Resource, Structural Biophysics Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA. ; Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, USA. j.engen@neu.edu kylie.walters@nih.gov daniel_finley@hms.harvard.edu. ; Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA. j.engen@neu.edu kylie.walters@nih.gov daniel_finley@hms.harvard.edu. ; Protein Processing Section, Structural Biophysics Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA. j.engen@neu.edu kylie.walters@nih.gov daniel_finley@hms.harvard.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26912900" target="_blank"〉PubMed〈/a〉
    Keywords: DNA-Binding Proteins/metabolism ; Endopeptidases/metabolism ; Metabolic Networks and Pathways ; Models, Molecular ; Mutation ; Proteasome Endopeptidase Complex/chemistry/genetics/*metabolism ; Saccharomyces cerevisiae/*metabolism ; Saccharomyces cerevisiae Proteins/*chemistry/genetics/*metabolism ; Ubiquitin-Specific Proteases/metabolism ; Ubiquitination
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  • 7
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2016-01-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Couzin-Frankel, Jennifer -- New York, N.Y. -- Science. 2016 Jan 29;351(6272):440-3. doi: 10.1126/science.351.6272.440.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26823410" target="_blank"〉PubMed〈/a〉
    Keywords: Child ; Child, Preschool ; DNA Mutational Analysis ; DNA Repair/genetics ; Female ; *Genes, Neoplasm ; *Genetic Predisposition to Disease ; Humans ; Male ; Mutation ; Neoplasms/*genetics/mortality ; Pedigree ; Tumor Suppressor Protein p53/genetics
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  • 8
    Publication Date: 2016-03-05
    Description: As tumors grow, they acquire mutations, some of which create neoantigens that influence the response of patients to immune checkpoint inhibitors. We explored the impact of neoantigen intratumor heterogeneity (ITH) on antitumor immunity. Through integrated analysis of ITH and neoantigen burden, we demonstrate a relationship between clonal neoantigen burden and overall survival in primary lung adenocarcinomas. CD8(+)tumor-infiltrating lymphocytes reactive to clonal neoantigens were identified in early-stage non-small cell lung cancer and expressed high levels of PD-1. Sensitivity to PD-1 and CTLA-4 blockade in patients with advanced NSCLC and melanoma was enhanced in tumors enriched for clonal neoantigens. T cells recognizing clonal neoantigens were detectable in patients with durable clinical benefit. Cytotoxic chemotherapy-induced subclonal neoantigens, contributing to an increased mutational load, were enriched in certain poor responders. These data suggest that neoantigen heterogeneity may influence immune surveillance and support therapeutic developments targeting clonal neoantigens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGranahan, Nicholas -- Furness, Andrew J S -- Rosenthal, Rachel -- Ramskov, Sofie -- Lyngaa, Rikke -- Saini, Sunil Kumar -- Jamal-Hanjani, Mariam -- Wilson, Gareth A -- Birkbak, Nicolai J -- Hiley, Crispin T -- Watkins, Thomas B K -- Shafi, Seema -- Murugaesu, Nirupa -- Mitter, Richard -- Akarca, Ayse U -- Linares, Joseph -- Marafioti, Teresa -- Henry, Jake Y -- Van Allen, Eliezer M -- Miao, Diana -- Schilling, Bastian -- Schadendorf, Dirk -- Garraway, Levi A -- Makarov, Vladimir -- Rizvi, Naiyer A -- Snyder, Alexandra -- Hellmann, Matthew D -- Merghoub, Taha -- Wolchok, Jedd D -- Shukla, Sachet A -- Wu, Catherine J -- Peggs, Karl S -- Chan, Timothy A -- Hadrup, Sine R -- Quezada, Sergio A -- Swanton, Charles -- 12100/Cancer Research UK/United Kingdom -- 1R01CA155010-02/CA/NCI NIH HHS/ -- 1R01CA182461-01/CA/NCI NIH HHS/ -- 1R01CA184922-01/CA/NCI NIH HHS/ -- Cancer Research UK/United Kingdom -- New York, N.Y. -- Science. 2016 Mar 25;351(6280):1463-9. doi: 10.1126/science.aaf1490. Epub 2016 Mar 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Francis Crick Institute, London WC2A 3LY, UK. Centre for Mathematics and Physics in the Life Sciences and Experimental Biology (CoMPLEX), University College London (UCL), London WC1E 6BT, UK. Cancer Research UK Lung Cancer Centre of Excellence, UCL Cancer Institute, London WC1E 6BT, UK. ; Cancer Research UK Lung Cancer Centre of Excellence, UCL Cancer Institute, London WC1E 6BT, UK. Cancer Immunology Unit, UCL Cancer Institute, UCL, London WC1E 6BT, UK. ; Cancer Research UK Lung Cancer Centre of Excellence, UCL Cancer Institute, London WC1E 6BT, UK. ; Section for Immunology and Vaccinology, National Veterinary Institute, Technical University of Denmark, 1970 Frederiksberg C, Denmark. ; The Francis Crick Institute, London WC2A 3LY, UK. Cancer Research UK Lung Cancer Centre of Excellence, UCL Cancer Institute, London WC1E 6BT, UK. ; The Francis Crick Institute, London WC2A 3LY, UK. ; Cancer Immunology Unit, UCL Cancer Institute, UCL, London WC1E 6BT, UK. Department of Cellular Pathology, UCL, London WC1E 6BT, UK. ; Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA. Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. Center for Cancer Precision Medicine, Dana-Farber Cancer Institute, Boston, MA 02215, USA. ; Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA. Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. ; Department of Dermatology, University Hospital, University Duisburg-Essen, 45147 Essen, Germany. German Cancer Consortium (DKTK), 69121 Heidelberg, Germany. ; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. ; Hematology/Oncology Division, 177 Fort Washington Avenue, Columbia University, New York, NY 10032, USA. ; Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. Weill Cornell Medical College, New York, NY 10065, USA. ; Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. Ludwig Collaborative Laboratory, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. ; Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. Weill Cornell Medical College, New York, NY 10065, USA. Ludwig Collaborative Laboratory, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. ; Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA. Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. Department of Medicine, Harvard Medical School, Boston, MA 02115, USA. Department of Internal Medicine, Brigham and Woman's Hospital, Boston, MA 02115, USA. ; Cancer Research UK Lung Cancer Centre of Excellence, UCL Cancer Institute, London WC1E 6BT, UK. Cancer Immunology Unit, UCL Cancer Institute, UCL, London WC1E 6BT, UK. s.quezada@ucl.ac.uk charles.swanton@crick.ac.uk. ; The Francis Crick Institute, London WC2A 3LY, UK. Cancer Research UK Lung Cancer Centre of Excellence, UCL Cancer Institute, London WC1E 6BT, UK. s.quezada@ucl.ac.uk charles.swanton@crick.ac.uk.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26940869" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/drug therapy/genetics/*immunology ; Aged ; Aged, 80 and over ; Antigens, Neoplasm/genetics/*immunology ; Antineoplastic Agents/therapeutic use ; CD4-Positive T-Lymphocytes/*immunology ; CTLA-4 Antigen/immunology ; Carcinoma, Non-Small-Cell Lung/genetics/immunology ; Cell Cycle Checkpoints/immunology ; Female ; Humans ; *Immunologic Surveillance ; Lung Neoplasms/drug therapy/genetics/*immunology ; Lymphocytes, Tumor-Infiltrating/immunology ; Male ; Melanoma/immunology ; Middle Aged ; Mutation ; Programmed Cell Death 1 Receptor/immunology ; Skin Neoplasms/immunology
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  • 9
    Publication Date: 2016-03-26
    Description: Brazil has experienced an unprecedented epidemic of Zika virus (ZIKV), with ~30,000 cases reported to date. ZIKV was first detected in Brazil in May 2015, and cases of microcephaly potentially associated with ZIKV infection were identified in November 2015. We performed next-generation sequencing to generate seven Brazilian ZIKV genomes sampled from four self-limited cases, one blood donor, one fatal adult case, and one newborn with microcephaly and congenital malformations. Results of phylogenetic and molecular clock analyses show a single introduction of ZIKV into the Americas, which we estimated to have occurred between May and December 2013, more than 12 months before the detection of ZIKV in Brazil. The estimated date of origin coincides with an increase in air passengers to Brazil from ZIKV-endemic areas, as well as with reported outbreaks in the Pacific Islands. ZIKV genomes from Brazil are phylogenetically interspersed with those from other South American and Caribbean countries. Mapping mutations onto existing structural models revealed the context of viral amino acid changes present in the outbreak lineage; however, no shared amino acid changes were found among the three currently available virus genomes from microcephaly cases. Municipality-level incidence data indicate that reports of suspected microcephaly in Brazil best correlate with ZIKV incidence around week 17 of pregnancy, although this correlation does not demonstrate causation. Our genetic description and analysis of ZIKV isolates in Brazil provide a baseline for future studies of the evolution and molecular epidemiology of this emerging virus in the Americas.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Faria, Nuno Rodrigues -- Azevedo, Raimunda do Socorro da Silva -- Kraemer, Moritz U G -- Souza, Renato -- Cunha, Mariana Sequetin -- Hill, Sarah C -- Theze, Julien -- Bonsall, Michael B -- Bowden, Thomas A -- Rissanen, Ilona -- Rocco, Iray Maria -- Nogueira, Juliana Silva -- Maeda, Adriana Yurika -- Vasami, Fernanda Giseli da Silva -- Macedo, Fernando Luiz de Lima -- Suzuki, Akemi -- Rodrigues, Sueli Guerreiro -- Cruz, Ana Cecilia Ribeiro -- Nunes, Bruno Tardeli -- Medeiros, Daniele Barbosa de Almeida -- Rodrigues, Daniela Sueli Guerreiro -- Nunes Queiroz, Alice Louize -- da Silva, Eliana Vieira Pinto -- Henriques, Daniele Freitas -- Travassos da Rosa, Elisabeth Salbe -- de Oliveira, Consuelo Silva -- Martins, Livia Caricio -- Vasconcelos, Helena Baldez -- Casseb, Livia Medeiros Neves -- Simith, Darlene de Brito -- Messina, Jane P -- Abade, Leandro -- Lourenco, Jose -- Carlos Junior Alcantara, Luiz -- de Lima, Maricelia Maia -- Giovanetti, Marta -- Hay, Simon I -- de Oliveira, Rodrigo Santos -- Lemos, Poliana da Silva -- de Oliveira, Layanna Freitas -- de Lima, Clayton Pereira Silva -- da Silva, Sandro Patroca -- de Vasconcelos, Janaina Mota -- Franco, Luciano -- Cardoso, Jedson Ferreira -- Vianez-Junior, Joao Lidio da Silva Goncalves -- Mir, Daiana -- Bello, Gonzalo -- Delatorre, Edson -- Khan, Kamran -- Creatore, Marisa -- Coelho, Giovanini Evelim -- de Oliveira, Wanderson Kleber -- Tesh, Robert -- Pybus, Oliver G -- Nunes, Marcio R T -- Vasconcelos, Pedro F C -- 090532/Z/09/Z/Wellcome Trust/United Kingdom -- 095066/Wellcome Trust/United Kingdom -- 102427/Wellcome Trust/United Kingdom -- MR/L009528/1/Medical Research Council/United Kingdom -- R24 AT 120942/AT/NCCIH NIH HHS/ -- New York, N.Y. -- Science. 2016 Apr 15;352(6283):345-9. doi: 10.1126/science.aaf5036. Epub 2016 Mar 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Technological Innovation, Evandro Chagas Institute, Ministry of Health, Ananindeua, PA 67030-000, Brazil. Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK. ; Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Ministry of Health, Ananindeua, Para State, Brazil. ; Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK. ; Instituto Adolfo Lutz, University of Sao Paulo, Sao Paulo, Brazil. ; Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK. ; Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK. Metabiota, San Francisco, CA 94104, USA. ; Oswaldo Cruz Foundation (FIOCRUZ), Salvador, Bahia, Brazil. ; Centre of Post Graduation in Collective Health, Department of Health, Universidade Estadual de Feira de Santana, Feira de Santana, Bahia, Brazil. ; Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA 98121, USA. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK. ; Center for Technological Innovation, Evandro Chagas Institute, Ministry of Health, Ananindeua, PA 67030-000, Brazil. ; Laboratorio de AIDS and Imunologia Molecular, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Brazil. ; Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada. Department of Medicine, Division of Infectious Diseases, University of Toronto, Toronto, Ontario, Canada. ; Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada. ; Brazilian Ministry of Health, Brasilia, Brazil. ; Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA. ; Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK. Metabiota, San Francisco, CA 94104, USA. oliver.pybus@zoo.ox.ac.uk marcionunesbrasil@yahoo.com.br pedrovasconcelos@iec.pa.gov.br. ; Center for Technological Innovation, Evandro Chagas Institute, Ministry of Health, Ananindeua, PA 67030-000, Brazil. Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA. oliver.pybus@zoo.ox.ac.uk marcionunesbrasil@yahoo.com.br pedrovasconcelos@iec.pa.gov.br. ; Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Ministry of Health, Ananindeua, Para State, Brazil. oliver.pybus@zoo.ox.ac.uk marcionunesbrasil@yahoo.com.br pedrovasconcelos@iec.pa.gov.br.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27013429" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/virology ; Americas/epidemiology ; Animals ; *Disease Outbreaks ; Female ; Genome, Viral/genetics ; Humans ; Incidence ; Insect Vectors/virology ; Microcephaly/*epidemiology/virology ; Molecular Epidemiology ; Molecular Sequence Data ; Mutation ; Pacific Islands/epidemiology ; Phylogeny ; Pregnancy ; RNA, Viral/genetics ; Sequence Analysis, RNA ; Travel ; Zika Virus/classification/*genetics/isolation & purification ; Zika Virus Infection/*epidemiology/transmission/*virology
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  • 10
    Publication Date: 2016-04-16
    Description: Drug resistance compromises control of malaria. Here, we show that resistance to a commonly used antimalarial medication, atovaquone, is apparently unable to spread. Atovaquone pressure selects parasites with mutations in cytochrome b, a respiratory protein with low but essential activity in the mammalian blood phase of the parasite life cycle. Resistance mutations rescue parasites from the drug but later prove lethal in the mosquito phase, where parasites require full respiration. Unable to respire efficiently, resistant parasites fail to complete mosquito development, arresting their life cycle. Because cytochrome b is encoded by the maternally inherited parasite mitochondrion, even outcrossing with wild-type strains cannot facilitate spread of resistance. Lack of transmission suggests that resistance will be unable to spread in the field, greatly enhancing the utility of atovaquone in malaria control.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goodman, Christopher D -- Siregar, Josephine E -- Mollard, Vanessa -- Vega-Rodriguez, Joel -- Syafruddin, Din -- Matsuoka, Hiroyuki -- Matsuzaki, Motomichi -- Toyama, Tomoko -- Sturm, Angelika -- Cozijnsen, Anton -- Jacobs-Lorena, Marcelo -- Kita, Kiyoshi -- Marzuki, Sangkot -- McFadden, Geoffrey I -- AI031478/AI/NIAID NIH HHS/ -- RR00052/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2016 Apr 15;352(6283):349-53. doi: 10.1126/science.aad9279.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of BioSciences, University of Melbourne, Melbourne, VIC 3010, Australia. gim@unimelb.edu.au deang@unimelb.edu.au. ; School of BioSciences, University of Melbourne, Melbourne, VIC 3010, Australia. Eijkman Institute for Molecular Biology, JI Diponegoro no. 69, Jakarta, 10430, Indonesia. Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. ; School of BioSciences, University of Melbourne, Melbourne, VIC 3010, Australia. ; Johns Hopkins University Bloomberg School of Public Health, Department of Molecular Microbiology and Immunology, Malaria Research Institute, Baltimore, MD 21205, USA. ; Eijkman Institute for Molecular Biology, JI Diponegoro no. 69, Jakarta, 10430, Indonesia. Department of Parasitology, Faculty of Medicine, Hasanuddin University, Jalan Perintis Kemerdekaan Km10, Makassar 90245, Indonesia. ; Division of Medical Zoology, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi 329-0498, Japan. ; Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. ; Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. School of Tropical Medicine and Global Health, Nagasaki University, Sakamoto, Nagasaki 852-8523, Japan. ; Eijkman Institute for Molecular Biology, JI Diponegoro no. 69, Jakarta, 10430, Indonesia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27081071" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anopheles/*parasitology ; Antimalarials/*pharmacology/therapeutic use ; Atovaquone/*pharmacology/therapeutic use ; Cell Line ; Cytochromes b/*genetics ; Drug Resistance/*genetics ; Genes, Mitochondrial/genetics ; Humans ; Life Cycle Stages/drug effects/genetics ; Malaria/drug therapy/*parasitology/transmission ; Male ; Mice ; Mitochondria/*genetics ; Mutation ; Plasmodium berghei/*drug effects/genetics/growth & development ; Selection, Genetic
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  • 11
    Publication Date: 2016-03-05
    Description: Oncogenes are activated through well-known chromosomal alterations such as gene fusion, translocation, and focal amplification. In light of recent evidence that the control of key genes depends on chromosome structures called insulated neighborhoods, we investigated whether proto-oncogenes occur within these structures and whether oncogene activation can occur via disruption of insulated neighborhood boundaries in cancer cells. We mapped insulated neighborhoods in T cell acute lymphoblastic leukemia (T-ALL) and found that tumor cell genomes contain recurrent microdeletions that eliminate the boundary sites of insulated neighborhoods containing prominent T-ALL proto-oncogenes. Perturbation of such boundaries in nonmalignant cells was sufficient to activate proto-oncogenes. Mutations affecting chromosome neighborhood boundaries were found in many types of cancer. Thus, oncogene activation can occur via genetic alterations that disrupt insulated neighborhoods in malignant cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hnisz, Denes -- Weintraub, Abraham S -- Day, Daniel S -- Valton, Anne-Laure -- Bak, Rasmus O -- Li, Charles H -- Goldmann, Johanna -- Lajoie, Bryan R -- Fan, Zi Peng -- Sigova, Alla A -- Reddy, Jessica -- Borges-Rivera, Diego -- Lee, Tong Ihn -- Jaenisch, Rudolf -- Porteus, Matthew H -- Dekker, Job -- Young, Richard A -- AI120766/AI/NIAID NIH HHS/ -- CA109901/CA/NCI NIH HHS/ -- HG002668/HG/NHGRI NIH HHS/ -- MH104610/MH/NIMH NIH HHS/ -- NS088538/NS/NINDS NIH HHS/ -- R01 GM 112720/GM/NIGMS NIH HHS/ -- R01 HG002668/HG/NHGRI NIH HHS/ -- R01 HG003143/HG/NHGRI NIH HHS/ -- R01 MH104610/MH/NIMH NIH HHS/ -- U01 DA 040588/DA/NIDA NIH HHS/ -- U01 HG007910/HG/NHGRI NIH HHS/ -- U01 R01 AI 117839/AI/NIAID NIH HHS/ -- U54 CA193419/CA/NCI NIH HHS/ -- U54 DK107980/DK/NIDDK NIH HHS/ -- U54 HG007010/HG/NHGRI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2016 Mar 25;351(6280):1454-8. doi: 10.1126/science.aad9024. Epub 2016 Mar 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA. ; Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA. Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. ; Program in Systems Biology, Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA. ; Department of Pediatrics, Stanford University, Stanford, CA, USA. ; Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA. Computational and Systems Biology Program, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. ; Program in Systems Biology, Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA. Howard Hughes Medical Institute. ; Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA. Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. young@wi.mit.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26940867" target="_blank"〉PubMed〈/a〉
    Keywords: *Chromosome Aberrations ; Chromosome Mapping ; *Gene Expression Regulation, Leukemic ; HEK293 Cells ; Humans ; Mutation ; Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/*genetics ; Proto-Oncogenes/*genetics ; *Sequence Deletion ; Transcriptional Activation ; *Translocation, Genetic
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  • 12
    Publication Date: 2016-03-26
    Description: Sequencing of exomes and genomes has revealed abundant genetic variation affecting the coding sequences of human transcription factors (TFs), but the consequences of such variation remain largely unexplored. We developed a computational, structure-based approach to evaluate TF variants for their impact on DNA binding activity and used universal protein-binding microarrays to assay sequence-specific DNA binding activity across 41 reference and 117 variant alleles found in individuals of diverse ancestries and families with Mendelian diseases. We found 77 variants in 28 genes that affect DNA binding affinity or specificity and identified thousands of rare alleles likely to alter the DNA binding activity of human sequence-specific TFs. Our results suggest that most individuals have unique repertoires of TF DNA binding activities, which may contribute to phenotypic variation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4825693/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4825693/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barrera, Luis A -- Vedenko, Anastasia -- Kurland, Jesse V -- Rogers, Julia M -- Gisselbrecht, Stephen S -- Rossin, Elizabeth J -- Woodard, Jaie -- Mariani, Luca -- Kock, Kian Hong -- Inukai, Sachi -- Siggers, Trevor -- Shokri, Leila -- Gordan, Raluca -- Sahni, Nidhi -- Cotsapas, Chris -- Hao, Tong -- Yi, Song -- Kellis, Manolis -- Daly, Mark J -- Vidal, Marc -- Hill, David E -- Bulyk, Martha L -- P50 HG004233/HG/NHGRI NIH HHS/ -- R01 HG003985/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2016 Mar 25;351(6280):1450-4. doi: 10.1126/science.aad2257. Epub 2016 Mar 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. Committee on Higher Degrees in Biophysics, Harvard University, Cambridge, MA 02138, USA. Harvard-MIT Division of Health Sciences and Technology, Harvard Medical School, Boston, MA 02115, USA. Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. ; Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. ; Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. Committee on Higher Degrees in Biophysics, Harvard University, Cambridge, MA 02138, USA. ; Harvard-MIT Division of Health Sciences and Technology, Harvard Medical School, Boston, MA 02115, USA. Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02139, USA. ; Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. Program in Biological and Biomedical Sciences, Harvard University, Cambridge, MA 02138, USA. ; Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA 02215, USA. Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA. Department of Genetics, Harvard Medical School, Boston, MA 02115, USA. ; Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02139, USA. ; Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02139, USA. ; Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02139, USA. Center for Human Genetics Research and Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, MA 02114, USA. ; Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. Committee on Higher Degrees in Biophysics, Harvard University, Cambridge, MA 02138, USA. Harvard-MIT Division of Health Sciences and Technology, Harvard Medical School, Boston, MA 02115, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02139, USA. Program in Biological and Biomedical Sciences, Harvard University, Cambridge, MA 02138, USA. Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA 02215, USA. Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27013732" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; Computer Simulation ; DNA/*metabolism ; DNA-Binding Proteins/*genetics/metabolism ; Exome/genetics ; *Gene Expression Regulation ; Genetic Diseases, Inborn/*genetics ; Genetic Variation ; Genome, Human ; Humans ; Mutation ; Polymorphism, Single Nucleotide ; Protein Array Analysis ; Protein Binding ; Sequence Analysis, DNA ; Transcription Factors/*genetics/metabolism
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  • 13
    Publication Date: 2016-01-02
    Description: Antibiotic treatment has two conflicting effects: the desired, immediate effect of inhibiting bacterial growth and the undesired, long-term effect of promoting the evolution of resistance. Although these contrasting outcomes seem inextricably linked, recent work has revealed several ways by which antibiotics can be combined to inhibit bacterial growth while, counterintuitively, selecting against resistant mutants. Decoupling treatment efficacy from the risk of resistance can be achieved by exploiting specific interactions between drugs, and the ways in which resistance mutations to a given drug can modulate these interactions or increase the sensitivity of the bacteria to other compounds. Although their practical application requires much further development and validation, and relies on advances in genomic diagnostics, these discoveries suggest novel paradigms that may restrict or even reverse the evolution of resistance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baym, Michael -- Stone, Laura K -- Kishony, Roy -- R01-GM081617/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2016 Jan 1;351(6268):aad3292. doi: 10.1126/science.aad3292.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Systems Biology, Harvard Medical School, Boston, MA, USA. ; Department of Systems Biology, Harvard Medical School, Boston, MA, USA. Department of Biology and Department of Computer Science, Technion - Israel Institute of Technology, Haifa, Israel. rkishony@technion.ac.il.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26722002" target="_blank"〉PubMed〈/a〉
    Keywords: Anti-Bacterial Agents/*pharmacology ; Bacteria/*drug effects/*genetics ; Drug Resistance, Bacterial/*genetics ; *Evolution, Molecular ; Humans ; Mutation ; Selection, Genetic
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  • 14
    Publication Date: 2016-03-26
    Description: Induction of broadly neutralizing antibodies (bnAbs) is a major HIV vaccine goal. Germline-targeting immunogens aim to initiate bnAb induction by activating bnAb germline precursor B cells. Critical unmet challenges are to determine whether bnAb precursor naive B cells bind germline-targeting immunogens and occur at sufficient frequency in humans for reliable vaccine responses. Using deep mutational scanning and multitarget optimization, we developed a germline-targeting immunogen (eOD-GT8) for diverse VRC01-class bnAbs. We then used the immunogen to isolate VRC01-class precursor naive B cells from HIV-uninfected donors. Frequencies of true VRC01-class precursors, their structures, and their eOD-GT8 affinities support this immunogen as a candidate human vaccine prime. These methods could be applied to germline targeting for other classes of HIV bnAbs and for Abs to other pathogens.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4872700/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4872700/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jardine, Joseph G -- Kulp, Daniel W -- Havenar-Daughton, Colin -- Sarkar, Anita -- Briney, Bryan -- Sok, Devin -- Sesterhenn, Fabian -- Ereno-Orbea, June -- Kalyuzhniy, Oleksandr -- Deresa, Isaiah -- Hu, Xiaozhen -- Spencer, Skye -- Jones, Meaghan -- Georgeson, Erik -- Adachi, Yumiko -- Kubitz, Michael -- deCamp, Allan C -- Julien, Jean-Philippe -- Wilson, Ian A -- Burton, Dennis R -- Crotty, Shane -- Schief, William R -- P01 AI094419/AI/NIAID NIH HHS/ -- P01 AI110657/AI/NIAID NIH HHS/ -- P41GM103393/GM/NIGMS NIH HHS/ -- R01 AI084817/AI/NIAID NIH HHS/ -- UM1 AI100663/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2016 Mar 25;351(6280):1458-63. doi: 10.1126/science.aad9195.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA. IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA. ; IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Program in Molecular Structure and Function, Hospital for Sick Children Research Institute, Toronto, Ontario M5G 0A4, Canada. ; Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Vaccine and Infectious Disease Division, Statistical Center for HIV/AIDS Research and Prevention (SCHARP), Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. ; IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. Program in Molecular Structure and Function, Hospital for Sick Children Research Institute, Toronto, Ontario M5G 0A4, Canada. Departments of Biochemistry and Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada. ; IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA. IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA 02129, USA. ; Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA. Division of Infectious Diseases, Department of Medicine, University of California San Diego School of Medicine, La Jolla, CA, USA. schief@scripps.edu shane@lji.org. ; Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA. IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA 02129, USA. schief@scripps.edu shane@lji.org.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27013733" target="_blank"〉PubMed〈/a〉
    Keywords: AIDS Vaccines/*immunology ; Amino Acid Sequence ; Antibodies, Monoclonal/chemistry/*immunology/isolation & purification ; Antibodies, Neutralizing/chemistry/*immunology/isolation & purification ; Antibody Affinity ; B-Lymphocytes/immunology ; Cell Separation ; Combinatorial Chemistry Techniques ; Epitopes, B-Lymphocyte/chemistry/genetics/*immunology ; Germ Cells/*immunology ; HIV Antibodies/chemistry/*immunology/isolation & purification ; HIV-1/*immunology ; Humans ; Molecular Sequence Data ; Mutation ; Peptide Library ; Precursor Cells, B-Lymphoid/*immunology ; Protein Conformation
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  • 15
    Publication Date: 2016-01-09
    Description: The lung is constantly exposed to environmental atmospheric cues. How it senses and responds to these cues is poorly defined. Here, we show that Roundabout receptor (Robo) genes are expressed in pulmonary neuroendocrine cells (PNECs), a rare, innervated epithelial population. Robo inactivation in mouse lung results in an inability of PNECs to cluster into sensory organoids and triggers increased neuropeptide production upon exposure to air. Excess neuropeptides lead to an increase in immune infiltrates, which in turn remodel the matrix and irreversibly simplify the alveoli. We demonstrate in vivo that PNECs act as precise airway sensors that elicit immune responses via neuropeptides. These findings suggest that the PNEC and neuropeptide abnormalities documented in a wide array of pulmonary diseases may profoundly affect symptoms and progression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Branchfield, Kelsey -- Nantie, Leah -- Verheyden, Jamie M -- Sui, Pengfei -- Wienhold, Mark D -- Sun, Xin -- 5T32AI007635/AI/NIAID NIH HHS/ -- HL097134/HL/NHLBI NIH HHS/ -- HL122406/HL/NHLBI NIH HHS/ -- R01 HL113870/HL/NHLBI NIH HHS/ -- T32 GM007133/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2016 Feb 12;351(6274):707-10. doi: 10.1126/science.aad7969. Epub 2016 Jan 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genetics, Department of Medical Genetics, University of Wisconsin-Madison, Madison, WI 53706, USA. ; Department of Pediatrics, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53706, USA. ; Laboratory of Genetics, Department of Medical Genetics, University of Wisconsin-Madison, Madison, WI 53706, USA. xsun@wisc.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26743624" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Clodronic Acid/pharmacology ; Lung/cytology/*immunology ; Lung Diseases/genetics/immunology ; Macrophages/drug effects/immunology ; Mice ; Mice, Mutant Strains ; Mutation ; Nerve Tissue Proteins/genetics/*physiology ; Neuroendocrine Cells/*immunology/metabolism ; Neuropeptides/*biosynthesis ; Receptors, Immunologic/genetics/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 16
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2016-04-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, Leslie -- New York, N.Y. -- Science. 2016 Apr 22;352(6284):403. doi: 10.1126/science.352.6284.403. Epub 2016 Apr 21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27102460" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antimalarials/pharmacology/*therapeutic use ; Artemisinins/pharmacology/*therapeutic use ; Drug Resistance/*genetics ; Humans ; Malaria, Falciparum/*drug therapy/epidemiology/*parasitology ; Mutation ; Myanmar/epidemiology ; Plasmodium falciparum/*drug effects/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 17
    Publication Date: 2016-01-30
    Description: The "cancerized field" concept posits that cancer-prone cells in a given tissue share an oncogenic mutation, but only discreet clones within the field initiate tumors. Most benign nevi carry oncogenic BRAF(V600E) mutations but rarely become melanoma. The zebrafish crestin gene is expressed embryonically in neural crest progenitors (NCPs) and specifically reexpressed in melanoma. Live imaging of transgenic zebrafish crestin reporters shows that within a cancerized field (BRAF(V600E)-mutant; p53-deficient), a single melanocyte reactivates the NCP state, revealing a fate change at melanoma initiation in this model. NCP transcription factors, including sox10, regulate crestin expression. Forced sox10 overexpression in melanocytes accelerated melanoma formation, which is consistent with activation of NCP genes and super-enhancers leading to melanoma. Our work highlights NCP state reemergence as a key event in melanoma initiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaufman, Charles K -- Mosimann, Christian -- Fan, Zi Peng -- Yang, Song -- Thomas, Andrew J -- Ablain, Julien -- Tan, Justin L -- Fogley, Rachel D -- van Rooijen, Ellen -- Hagedorn, Elliott J -- Ciarlo, Christie -- White, Richard M -- Matos, Dominick A -- Puller, Ann-Christin -- Santoriello, Cristina -- Liao, Eric C -- Young, Richard A -- Zon, Leonard I -- HG002668/HG/NHGRI NIH HHS/ -- K08 AR061071/AR/NIAMS NIH HHS/ -- R01 CA103846/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2016 Jan 29;351(6272):aad2197. doi: 10.1126/science.aad2197. Epub 2016 Jan 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Stem Cell Program and Division of Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, MA 02115, USA. Harvard Stem Cell Institute, Boston, MA 02115, USA. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA. Harvard Medical School, Boston, MA 02115, USA. ; Institute of Molecular Life Sciences, University of Zurich, 8057 Zurich, Switzerland. ; Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, MA 02142, USA. Computational and Systems Biology Program, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. ; Stem Cell Program and Division of Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, MA 02115, USA. Harvard Stem Cell Institute, Boston, MA 02115, USA. ; Stem Cell Program and Division of Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, MA 02115, USA. ; Stem Cell Program and Division of Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, MA 02115, USA. Harvard Stem Cell Institute, Boston, MA 02115, USA. Harvard Medical School, Boston, MA 02115, USA. ; Stem Cell Program and Division of Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, MA 02115, USA. Harvard Medical School, Boston, MA 02115, USA. ; Memorial Sloan Kettering Cancer Center, Weill Cornell Medical College, New York, NY 10075, USA. ; Massachusetts General Hospital Cancer Center, Harvard Medical School, Charlestown, MA 02129, USA. ; Research Institute Children's Cancer Center Hamburg and Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany. ; Stem Cell Program and Division of Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, MA 02115, USA. Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA. ; Harvard Stem Cell Institute, Boston, MA 02115, USA. Harvard Medical School, Boston, MA 02115, USA. Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02114, USA. ; Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, MA 02142, USA. Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. ; Stem Cell Program and Division of Hematology/Oncology, Children's Hospital Boston, Howard Hughes Medical Institute, Boston, MA 02115, USA. Harvard Stem Cell Institute, Boston, MA 02115, USA. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA. Harvard Medical School, Boston, MA 02115, USA. Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA. zon@enders.tch.harvard.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26823433" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Genetically Modified ; Carcinogenesis/*genetics ; Embryonic Stem Cells/metabolism ; Enhancer Elements, Genetic ; *Gene Expression Regulation, Developmental ; *Gene Expression Regulation, Neoplastic ; Genes, Reporter ; Green Fluorescent Proteins/genetics ; Melanocytes/metabolism ; Melanoma/*genetics ; Melanoma, Experimental/*genetics ; Mutation ; Nerve Tissue Proteins/genetics ; Neural Crest/*metabolism ; Proto-Oncogene Proteins B-raf/genetics ; SOXE Transcription Factors/genetics ; Skin Neoplasms/*genetics ; Tumor Suppressor Protein p53/genetics ; *Zebrafish ; Zebrafish Proteins/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 18
    Publication Date: 2016-03-12
    Description: Type IVa pili are filamentous cell surface structures observed in many bacteria. They pull cells forward by extending, adhering to surfaces, and then retracting. We used cryo-electron tomography of intact Myxococcus xanthus cells to visualize type IVa pili and the protein machine that assembles and retracts them (the type IVa pilus machine, or T4PM) in situ, in both the piliated and nonpiliated states, at a resolution of 3 to 4 nanometers. We found that T4PM comprises an outer membrane pore, four interconnected ring structures in the periplasm and cytoplasm, a cytoplasmic disc and dome, and a periplasmic stem. By systematically imaging mutants lacking defined T4PM proteins or with individual proteins fused to tags, we mapped the locations of all 10 T4PM core components and the minor pilins, thereby providing insights into pilus assembly, structure, and function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, Yi-Wei -- Rettberg, Lee A -- Treuner-Lange, Anke -- Iwasa, Janet -- Sogaard-Andersen, Lotte -- Jensen, Grant J -- R01 GM094800B/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2016 Mar 11;351(6278):aad2001. doi: 10.1126/science.aad2001. Epub 2016 Mar 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉California Institute of Technology, Pasadena, CA 91125, USA. Howard Hughes Medical Institute, Pasadena, CA 91125, USA. ; Howard Hughes Medical Institute, Pasadena, CA 91125, USA. ; Max Planck Institute for Terrestrial Microbiology, 35043 Marburg, Germany. ; University of Utah, Salt Lake City, UT 84112, USA. ; California Institute of Technology, Pasadena, CA 91125, USA. Howard Hughes Medical Institute, Pasadena, CA 91125, USA. jensen@caltech.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26965631" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Adhesion ; Cryoelectron Microscopy ; Fimbriae, Bacterial/genetics/*ultrastructure ; Microscopy, Electron, Transmission ; Models, Molecular ; Mutation ; Myxococcus xanthus/genetics/physiology/*ultrastructure
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 19
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    Journal of molecular evolution 39 (1994), S. 448-451 
    ISSN: 1432-1432
    Keywords: Synonymous substitution ; Escherichia coli ; Salmonella typhimurium ; Mutation ; Recombination ; Selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The spatial distribution of synonymous substitutions in enterobacterial genes is investigated. It is shown that synonymous substitutions are significantly clustered in such a way that a synonymous substitution in one codon elevates the rate of synonymous substitution in an adjacent codon by about 10%. The level of clustering does not appear to be related to the level of gene expression, and it is restricted to a range of two or three codons. There are at least three possible explanations: (1) sequence-directed mutagenesis, (2) recombination, and (3) selection.
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  • 20
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    Plant cell reports 13 (1994), S. 372-376 
    ISSN: 1432-203X
    Keywords: Asparagus officinalis L ; Habituation ; Mutation ; Somatic embryogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Somatic embryogenesis from different genotypes of Asparagus officinalis L. could be obtained by in vitro culture of shoot apices. Apices were first cultured on an auxin-rich inducing medium and then transferred onto a hormone-free development medium. All genotypes tested in this way produced a few somatic embryos. In some experiments, during the development phase, a new kind of friable highly embryogenic tissue appeared in a random manner. These tissues could be continuously subcultured on a hormone-free medium and were named embryogenic lines. Five of these embryogenic lines regenerated plants from somatic embryos. These regenerated plants exhibited an increased embryogenic response compared to the parent plants; e.g. apex culture produced somatic embryos without any auxin treatments. For one of the embryogenic lines, a genetic analysis showed that the improved embryogenic response of regenerated plants was controlled by a mendelian dominant monogenic mutation.
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  • 21
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    Current genetics 26 (1994), S. 281-284 
    ISSN: 1432-0983
    Keywords: Ofloxacin ; Mitochondria ; Mutation ; Recombination ; Topoisomerase ; Yeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ofloxacin, a specific inhibitor of bacterial topoisomerase II, is known to inhibit the growth of yeast cells and to induce rho − mutants in the yeast S. cerevisiae. The frequency of ofloxacin-induced petite mutants under non-growth conditions was found to be strongly diminished when the cells were depleted in intramitochondrial ATP. Under optimal conditions of mitochondrial mutagenesis the drug induced mitotic recombination and reverse mutation in diploid strains but failed to cure either killer plasmids or the 2 μm DNA of dividing cells. The sensitivity to ofloxacin of the strains deficient in the DNA strandbreak repair pathway (rad52) was significantly higher then that of the wild-type strains and of the mutants deficient in excision or mutagenic DNA repair. The results are compatible with the idea that the cytotoxic and genetic activity of ofloxacin in yeast probably results from the inhibited DNA ligation function of topoisomerase II creating DNA breaks that are reparable through the recombination repair pathway.
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  • 22
    ISSN: 1432-072X
    Keywords: Fatty acids ; Mortierella alpina ; ω3-Desaturation ; Mutation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A mutant considered to be defective in the conversion of n-6 to n-3 fatty acids (ω3-desaturation) was derived from a Δ5-desaturation-defective mutant (Mut44) of Mortierella alpina 1S-4, after treating its spores with N-methyl-N′-nitro-N-nitrosoguanidine. This mutant cannot produce 8(Z),11(Z),14(Z),17(Z)-eicosatetraenoic acid or any other n-3 fatty acids, of which about 10% was found in its parental strain upon cultivation at 12°C. The mutant's growth rate was comparable to that of the parental strain when grown at 28°C, but it became much slower when the mutant grew at 12°C, at which the lag phase for Mut44 was about 2 d but 5 d for the mutant.
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  • 23
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    Journal of mathematical biology 33 (1994), S. 111-137 
    ISSN: 1432-1416
    Keywords: B-cells ; Immune system ; Idiotypic networks ; Mutation ; Replicator equations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract In order to evaluate the role of idiotypic networks in the operation of the immune system a number of mathematical models have been formulated. Here we examine a class of B-cell models in which cell proliferation is governed by a non-negative, unimodal, symmetric response function f(h), where the field h summarizes the effect of the network on a single clone. We show that by transforming into relative concentrations, the B-cell network equations can be brought into a form that closely resembles the replicator equation. We then show that when the total number of clones in a network is conserved, the dynamics of the network can be represented by the dynamics of a replicator equation. The number of equilibria and their stability are then characterized using methods developed for the study of second-order replicator equations. Analogies with standard Lotka-Volterra equations are also indicated. A particularly interesting result of our analysis is the fact that even though the immune network equations are not second-order, the number and stability of their equilibria can be obtained by a superposition of second-order replicator systems. As a consequence, the problem of finding all of the equilibrium points of the nonlinear network equations can be reduced to solving linear equations.
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  • 24
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    The journal of membrane biology 139 (1994), S. 203-212 
    ISSN: 1432-1424
    Keywords: Mg2+ current ; Mutation ; Paramecium ; Intracellular Mg2+ homeostasis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract “Eccentric” is a newly-isolated mutant of Paramecium tetraurelia that fails to swim backwards in response to Mg2+. In the wild type, this backward swimming results from Mg2+ influx via a Mg2+-specific ion conductance (I Mg. Voltage-clamp analysis confirmed that, as suspected, step changes in membrane potential over a physiological range fail to elicit I Mg from eccentric. Further electrophysiological investigation revealed a number of additional ion-current defects in eccentric: (i) The Ca2+ current activated upon depolarization inactivates more slowly in eccentric than in the wild type, and it requires longer to recover from this inactivation. (ii) The Ca2+-dependent Na+ current deactivates significantly faster in the mutant, (iii) The two K+ currents observed upon hyperpolarization are reduced by 〉60% in eccentric. It is difficult to envision how these varied pleiotropic effects could result from loss of a single ion current. Rather, they suggest that the eccentric mutation affects a global regulatory system. Two plausible hypotheses are discussed.
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  • 25
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    Journal of mathematical biology 32 (1994), S. 193-218 
    ISSN: 1432-1416
    Keywords: Selection ; Mutation ; Mutation load ; Quantitative genetic traits
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract Haldane (1937) showed that the reduction of equilibrium mean fitness in an infinite population due to recurrent deleterious mutations depends only on the mutation rate but not on the harmfulness of mutants. His analysis, as well as more recent ones (cf. Crow 1970), ignored back mutation. The purpose of the present paper is to extend these results to arbitrary mutation patterns among alleles and to quantitative genetic traits. We derive first-order approximations for the equilibrium mean fitness (and the mutation load) and determine the order of the error term. For a metric trait under mutation-stabilizing-selection balance our result differs qualitatively from that of Crow and Kimura (1964), whose analysis is based on a Gaussian assumption. Our general approach also yields a mathematical proof that the variance under the usual mutation-stabilizing-selection model is, to first order, µ/s (the house-of-cards approximation) as µ/s tends to zero. This holds for arbitrary mutant distributions and does not require that the population mean coincide with the optimum. We show how the mutant distribution determines the order of the error term, and thus the accuracy of the house-of-cards approximation. Upper and lower bounds to the equilibrium variance are derived that deviate only to second order as µ/s tends to zero. The multilocus case is treated under the assumption of global linkage equilibrium.
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  • 26
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    Theoretical and applied genetics 87 (1994), S. 657-667 
    ISSN: 1432-2242
    Keywords: Transposable elements ; Mutation ; Evolution ; DNA repair ; Gene conversion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The mobile DNAs of the Mutator system of maize (Zea mays) are exceptional both in structure and diversity. So far, six subfamilies of Mu elements have been discovered; all Mu elements share highly conserved terminal inverted repeats (TIRs), but each sub-family is defined by internal sequences that are apparently unrelated to the internal sequences of any other Mu subfamily. The Mu1/Mu2 subfamily of elements was created by the acquisition of a portion of a standard maize gene (termed MRS-A) within two Mu TIRs. Beside the unusually long (185–359 bp) and diverse TIRs found on all of these elements, other direct and inverted repeats are often found either within the central portion of a Mu element or within a TIR. Our computer analyses have shown that sequence duplications (mostly short direct repeats interrupted by a few base pairs) are common in non-autonomous members of the Mutator, Ac/Ds, and Spm(En) systems. These duplications are often tightly associated with the element-internal end of the TIRs. Comparisons of Mu element sequences have indicated that they share more terminal components than previously reported; all subfamilies have at least the most terminal 215 bp, at one end or the other, of the 359-bp Mu5 TIR. These data suggest that many Mu element subfamilies were generated from a parental element that had termini like those of Mu5. With the Mu5 TIRs as a standard, it was possible to determine that elements like Mu4 could have had their unusual TIRs created through a three-step process involving (1) addition of sequences to interrupt one TIR, (2) formation of a stem-loop structure by one strand of the element, and (3) a subsequent DNA repair/gene conversion event that duplicated the insertion(s) within the other TIR. A similar repair/conversion extending from a TIR stem into loop DNA could explain the additional inverted repeat sequences added to the internal ends of the Mu4 and Mu7 TIRs. This same basic mechanism was found to be capable of generating new Mu element subfamilies. After endonucleolytic attack of the loop within the stem-loop structure, repair/conversion of the gap could occur as an intermolecular event to generate novel internal sequences and, therefore, a new Mu element subfamily. Evidence supporting and expanding this model of new Mu element subfamily creation was identified in the sequence of MRS-A.
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  • 27
    ISSN: 1617-4623
    Keywords: Rice ; Tetraploid irradiation ; Genome rearrangement ; rDNA ; Mutation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The organization of tandemly repeated sequences of ribosomal DNA (rDNA) in rice mutants derived from γ-irradiated tetraploids was analyzed. Southern hybridization analysis of nuclear DNA revealed that most of the intergenic spacers (IGSs) in mutant rDNA are replaced concertedly by new molecular species. The new IGSs are produced by the amplification of a subrepeat of about 250 bp. Results obtained from sequence analyses indicate that various intermediate molecular species of the subrepeat were formed during structuring of the IGS region and that many rearrangements occurred between them. These findings demonstrate the effectiveness of recurrent irradiation of tetraploids for inducing artificial genome rearrangement, and also indicate the extreme plasticity and variability of genome structure in plants.
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  • 28
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    Pharmacy world & science 16 (1994), S. 55-61 
    ISSN: 1573-739X
    Keywords: AMP deaminase/deliciency ; Deficiency diseases ; Genetics, biochemical ; Mutation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In man, there are at least four isoforms of adenosine monophosphate deaminase (AMPD): myoadenylate deaminase in skeletal muscle, the L isoform in liver, and the E1 and E2 isoforms in erythrocytes. Myoadenylafe deaminase is encoded by the AMPD1 gene located on chromosome 1 p13-p21, the L isoform by the AMPD2 gene, and both isoforms in erythrocytes by the AMPD3 gene. Myoadenylate deaminase deficiency is found in 2–3% of all muscle biopsies. The inborn type of myoadenylate deaminase deficiency is caused by a single mutant allele harbouring two mutations: C34→T (Gin→Stop) and C143→T (Pro-48→Leu). Population studies revealed a frequency of the mutant allele of 0.12 in Caucasian Americans and Germans. The C34→T mutation is located in exon 2, which is alternatively spliced in part of the AMPD1 transcript in human muscle. Since the second mutation does not affect enzyme function, alternatively spliced mRNA encodes a catalytically active enzyme. Only one patient with a disorder linked to liver AMPD has been described so far. In this patient the decreased inhibition of this enzyme by GTP resulted in uric acid overproduction and gout. A complete lack of erythrocyte AMPD activity is found in asymptomatic subjects. The molecular basis of both disorders is not yet known.
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  • 29
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    Molecular genetics and genomics 244 (1994), S. 295-302 
    ISSN: 1617-4623
    Keywords: DNA repair ; Recombination ; Virulence ; Mutation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The recA + gene of Vibrio cholerae O1 has been cloned, its nucleotide sequence determined and the product characterized. A deletion mutation was constructed in the recA gene and mutants showed the typical sensitivity to UV and to DNA-damaging agents, as well as an inability to mediate homologous DNA recombination. The chromosomal recA deletion mutants in V. cholerae do not show altered virulence in the infant mouse cholera model and are thus ideal strains for use in complementation studies.
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  • 30
    ISSN: 1617-4623
    Keywords: Streptococcus pyogenes ; vir regulon ; emm-related genes ; Recombination ; Mutation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract One of the most prevalent genetic lineages of group A streptococci (GAS) harbors a genomic locus termed the large vir regulon, which contains an emm gene encoding the antiphagocytic M protein, and structurally related fcrA and enn (emm-related) genes encoding immunoglobulin-binding proteins. In the present study more than 100 large vir regulons from 42 different GAS serotypes were analyzed by PCR and partial DNA sequencing. On comparing these data to published sequences, sites of mutational and putative recombinational events were identified and ordered with respect to their intra/intergenic or intra/intergenomic nature. The emm-related genes were found to display small intragenic deletions or insertions, were completely deleted from, or newly inserted into the genome, or were fused to adjacent genes. Intergenomic exchanges of complete emm-related genes, or segments thereof, between different vir regulons were detected. Most of these processes seem to involve short flanking direct repeats. Occasionally, the structural changes could be correlated with changes in the functions of the encoded proteins.
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  • 31
    ISSN: 1617-4623
    Keywords: Deficiency mapping ; Mutation ; Telomere Chromosome structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A mutator, mu2, in Drosophila melanogaster has been identified recently that potentiates the recovery of terminal deficiencies. The deleted chromosomes behave as if they had been capped; that is, they are protected from degradation and from fusion with other chromosome fragments. The mutator maps near the telomere on the left arm of chromosome 3. Using the selectable marker Aprt, 150 deficiencies for region 62 of the cytological map have been recovered. These deficiencies identify the map position of mu2 as 62B11-C1. A yeast artificial chromosome spanning this region has been subcloned into lambda phage, and the positions of deficiency breakpoints on either side of the mu2 gene have been identified within the subclones. These positions limit the location of the left end of the gene to a 23 kb region. In the course of these experiments, three additional, presumptive mutant alleles were identified, suggesting that other mutator alleles remain undiscovered in many standard laboratory stocks.
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  • 32
    Publication Date: 1994-10-14
    Description: Mice deficient for the gene encoding alpha-calcium-calmodulin-dependent kinase II (alpha-CaMKII knockout mice) provide a promising tool to link behavioral and cellular abnormalities with a specific molecular lesion. The heterozygous mouse exhibited a well-circumscribed syndrome of behavioral abnormalities, consisting primarily of a decreased fear response and an increase in defensive aggression, in the absence of any measured cognitive deficits. Unlike the heterozygote, the homozygote displayed abnormal behavior in all paradigms tested. At the cellular level, both extracellular and whole-cell patch clamp recordings indicated that serotonin release in putative serotonergic neurons of the dorsal raphe was reduced. Thus, alpha-CaMKII knockout mice, in particular the heterozygote, may provide a model for studying the molecular and cellular basis underlying emotional disorders involving fear and aggression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, C -- Rainnie, D G -- Greene, R W -- Tonegawa, S -- New York, N.Y. -- Science. 1994 Oct 14;266(5183):291-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Center for Cancer Research, Cambridge, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7939668" target="_blank"〉PubMed〈/a〉
    Keywords: *Aggression ; Animals ; Behavior, Animal ; Calcium-Calmodulin-Dependent Protein Kinase Type 2 ; Calcium-Calmodulin-Dependent Protein Kinases/deficiency/genetics/*physiology ; *Fear ; Fluoxetine/pharmacology ; Gene Dosage ; Heterozygote ; Homozygote ; In Vitro Techniques ; Membrane Potentials ; Mice ; Mice, Knockout ; Mutation ; Neurons/metabolism ; Patch-Clamp Techniques ; Raphe Nuclei/metabolism ; Serotonin/metabolism/pharmacology ; Synaptic Transmission/drug effects
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 33
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-11-18
    Description: A diverse set of circadian clock mutants was isolated in a cyanobacterial strain that carries a bacterial luciferase reporter gene attached to a clock-controlled promoter. Among 150,000 clones of chemically mutagenized bioluminescent cells, 12 mutants were isolated that exhibit a broad spectrum of periods (between 16 and 60 hours), and 5 mutants were found that show a variety of unusual patterns, including arrhythmia. These mutations appear to be clock-specific. Moreover, it was demonstrated that in this cyanobacterium it is possible to clone mutant genes by complementation, which provides a means to genetically dissect the circadian mechanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kondo, T -- Tsinoremas, N F -- Golden, S S -- Johnson, C H -- Kutsuna, S -- Ishiura, M -- GM37040/GM/NIGMS NIH HHS/ -- MH43836/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1994 Nov 18;266(5188):1233-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Institute for Basic Biology, Okazaki, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973706" target="_blank"〉PubMed〈/a〉
    Keywords: Circadian Rhythm/*genetics ; Cloning, Molecular ; Cyanobacteria/*genetics/growth & development/physiology ; Darkness ; *Genes, Bacterial ; Genetic Complementation Test ; Light ; Luminescent Measurements ; Mutagenesis ; Mutation ; Temperature
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  • 34
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-04-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simm, M -- New York, N.Y. -- Science. 1994 Apr 29;264(5159):653.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8171314" target="_blank"〉PubMed〈/a〉
    Keywords: Academies and Institutes/*organization & administration ; Aggression ; Behavioral Research ; Dissent and Disputes ; *Genetics, Behavioral ; Germany ; Group Processes ; Humans ; *Molecular Biology ; Mutation ; National Socialism ; *Violence
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  • 35
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-12-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koshland, D E Jr -- New York, N.Y. -- Science. 1994 Dec 23;266(5193):1925.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7801114" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA Damage ; *DNA Ligases ; *DNA Repair ; DNA Replication ; Humans ; Mutation ; Species Specificity
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  • 36
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-12-02
    Description: Estrogen hormones produce physiological actions within a variety of target sites in the body and during development by activating a specific receptor protein. Hormone responsiveness for the estrogen receptor protein was investigated at different stages of development with the use of gene knockout techniques because no natural genetic mutants have been described. A mutant mouse line without a functional estrogen receptor was created and is being used to assess estrogen responsiveness. Both sexes of these mutant animals are infertile and show a variety of phenotypic changes, some of which are associated with the gonads, mammary glands, reproductive tracts, and skeletal tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Korach, K S -- New York, N.Y. -- Science. 1994 Dec 2;266(5190):1524-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Receptor Biology Section, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7985022" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Estrogens/*physiology ; Female ; Heterozygote ; Homozygote ; Humans ; Infertility, Female/etiology ; Infertility, Male/etiology ; Male ; Mice ; Mice, Knockout ; Mutation ; Phenotype ; Receptors, Estrogen/genetics/*physiology ; Signal Transduction
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  • 37
    Publication Date: 1994-11-04
    Description: Transcription terminators recognized by several RNA polymerases include a DNA segment encoding uridine-rich RNA and, for bacterial RNA polymerase, a hairpin loop located immediately upstream. Here, mutationally altered Escherichia coli RNA polymerase enzymes that have different termination efficiencies were used to show that the extent of transcription through the uridine-rich encoding segment is controlled by the substrate concentration of nucleoside triphosphate. This result implies that the rate of elongation determines the probability of transcript release. Moreover, the position of release sites suggests an important spatial relation between the RNA hairpin and the boundary of the terminator.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McDowell, J C -- Roberts, J W -- Jin, D J -- Gross, C -- New York, N.Y. -- Science. 1994 Nov 4;266(5186):822-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Biochemistry, Molecular and Cell Biology, Cornell University, Ithaca, NY 14853.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7526463" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; DNA-Directed RNA Polymerases/genetics/*metabolism ; Escherichia coli/enzymology/genetics ; Molecular Sequence Data ; Mutation ; Nucleic Acid Conformation ; Nucleotides/metabolism ; RNA, Bacterial/*genetics/metabolism ; *Terminator Regions, Genetic ; *Transcription, Genetic ; Uridine Triphosphate/metabolism
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  • 38
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-05-20
    Description: A predictive rule for protein folding is presented that involves two recurrent glycine-based motifs that cap the carboxyl termini of alpha helices. In proteins, helices that terminated in glycine residues were found predominantly in one of these two motifs. These glycine structures had a characteristic pattern of polar and apolar residues. Visual inspection of known helical sequences was sufficient to distinguish the two motifs from each other and from internal glycines that fail to terminate helices. These glycine motifs--in which the local sequence selects between available structures--represent an example of a stereochemical rule for protein folding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aurora, R -- Srinivasan, R -- Rose, G D -- GM 29458/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1994 May 20;264(5162):1126-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8178170" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Glycine/*chemistry ; Hydrogen Bonding ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Oligopeptides/chemistry ; *Protein Folding ; *Protein Structure, Secondary
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  • 39
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-02-11
    Description: The TAFII250 subunit of the human transcription factor IID (TFIID) rescues the temperature-sensitive hamster cell line ts13 and overcomes a G1 arrest. Investigation of the transcriptional properties of ts13 nuclear extracts in vitro showed that activation by the site-specific regulators Sp1 and Gal4VP16 is temperature sensitive in ts13 extracts, whereas basal transcription remains unaffected. This transcriptional defect can be rescued by purified human TFIID or by expression of wild-type TAFII250 in ts13 cells. Expression from the cyclin A but not c-fos promoter is temperature sensitive in these mutant cells. Thus, the mutation in TAFII250 appears to have gene-specific effects that may lead to the ts13 cell cycle phenotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, E H -- Tjian, R -- New York, N.Y. -- Science. 1994 Feb 11;263(5148):811-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, Howard Hughes Medical Institute, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8303298" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cyclins/genetics ; DNA-Binding Proteins/*genetics/physiology ; Fungal Proteins/physiology ; *G1 Phase ; Genes, fos ; Genetic Complementation Test ; Genetic Vectors ; Histone Acetyltransferases ; Humans ; Mutation ; Nuclear Proteins/*genetics/physiology ; *Promoter Regions, Genetic ; Sp1 Transcription Factor/physiology ; *TATA-Binding Protein Associated Factors ; Temperature ; Trans-Activators/physiology ; Transcription Factor TFIID ; Transcription Factors/pharmacology ; *Transcription, Genetic ; Transfection
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  • 40
    Publication Date: 1994-04-29
    Description: To facilitate molecular genetic analysis of vertebrate development, haploid genetics was used to construct a recombination map for the zebrafish Danio (Brachydanio) rerio. The map consists of 401 random amplified polymorphic DNAs (RAPDs) and 13 simple sequence repeats spaced at an average interval of 5.8 centimorgans. Strategies that exploit the advantages of haploid genetics and RAPD markers were developed that quickly mapped lethal and visible mutations and that placed cloned genes on the map. This map is useful for the position-based cloning of mutant genes, the characterization of chromosome rearrangements, and the investigation of evolution in vertebrate genomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Postlethwait, J H -- Johnson, S L -- Midson, C N -- Talbot, W S -- Gates, M -- Ballinger, E W -- Africa, D -- Andrews, R -- Carl, T -- Eisen, J S -- 1RO1AI26734/AI/NIAID NIH HHS/ -- HD07470/HD/NICHD NIH HHS/ -- NS23915/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1994 Apr 29;264(5159):699-703.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Neurosciences, University of Oregon, Eugene 97403.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8171321" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Chromosome Mapping ; Cloning, Molecular ; Female ; Genetic Markers ; Genotype ; Male ; Mutation ; Phenotype ; Polymerase Chain Reaction ; Repetitive Sequences, Nucleic Acid ; Software ; Zebrafish/*genetics
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  • 41
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-06-03
    Description: Two Arabidopsis thaliana genes, QRT1 and QRT2, are required for pollen separation during normal development. In qrt mutants, the outer walls of the four meiotic products of the pollen mother cell are fused, and pollen grains are released in tetrads. Pollen is viable and fertile, and the cytoplasmic pollen contents are discrete. Pollination with a single tetrad usually yields four seeds, and genetic analysis confirmed that marker loci segregate in a 2:2 ratio within these tetrads. These mutations allow tetrad analysis to be performed in Arabidopsis and define steps in pollen cell wall development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Preuss, D -- Rhee, S Y -- Davis, R W -- New York, N.Y. -- Science. 1994 Jun 3;264(5164):1458-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Stanford University, CA 94305-5307.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8197459" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/*genetics/physiology/ultrastructure ; Cell Wall/ultrastructure ; Chromosome Mapping ; *Genes, Plant ; Genetic Markers ; Glucuronidase/genetics ; Heterozygote ; Meiosis ; Microscopy, Electron, Scanning ; Mutation ; Phenotype ; Pollen/*physiology/ultrastructure
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  • 42
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-04-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, F E -- Pan, K M -- Huang, Z -- Baldwin, M -- Fletterick, R J -- Prusiner, S B -- New York, N.Y. -- Science. 1994 Apr 22;264(5158):530-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of California, San Francisco 94143-0518.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7909169" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Mice ; Mice, Transgenic ; Models, Biological ; Mutation ; PrPSc Proteins ; Prion Diseases/*metabolism/transmission ; Prions/*biosynthesis/chemistry/genetics/metabolism ; Protein Conformation ; Protein Structure, Secondary
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  • 43
    Publication Date: 1994-01-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉St George-Hyslop, P -- McLachlan, D C -- Tsuda, T -- Rogaev, E -- Karlinsky, H -- Lippa, C F -- Pollen, D -- New York, N.Y. -- Science. 1994 Jan 28;263(5146):537.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8290965" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/*genetics ; Amyloid beta-Protein Precursor/*genetics ; Apolipoprotein E4 ; Apolipoproteins E/*genetics ; Genotype ; Humans ; Mutation ; Phenotype
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  • 44
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-04-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weissmann, C -- New York, N.Y. -- Science. 1994 Apr 22;264(5158):528-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Molecularbiologie I, Universitat Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7909168" target="_blank"〉PubMed〈/a〉
    Keywords: Aspartic Acid/analogs & derivatives/metabolism ; Fungal Proteins/chemistry/*genetics ; Genes, Fungal ; Glutathione Peroxidase ; Mutation ; PrPSc Proteins ; Prions/chemistry/genetics ; Protein Conformation ; Saccharomyces cerevisiae/*genetics/metabolism ; *Saccharomyces cerevisiae Proteins
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  • 45
    Publication Date: 1994-04-29
    Description: A gene, reaper (rpr), that appears to play a central control function for the initiation of programmed cell death (apoptosis) in Drosophila was identified. Virtually all programmed cell death that normally occurs during Drosophila embryogenesis was blocked in embryos homozygous for a small deletion that includes the reaper gene. Mutant embryos contained many extra cells and failed to hatch, but many other aspects of development appeared quite normal. Deletions that include reaper also protected embryos from apoptosis caused by x-irradiation and developmental defects. However, high doses of x-rays induced some apoptosis in mutant embryos, and the resulting corpses were phagocytosed by macrophages. These data suggest that the basic cell death program is intact although it was not activated in mutant embryos. The DNA encompassed by the deletion was cloned and the reaper gene was identified on the basis of the ability of cloned DNA to restore apoptosis to cell death defective embryos in germ line transformation experiments. The reaper gene appears to encode a small peptide that shows no homology to known proteins, and reaper messenger RNA is expressed in cells destined to undergo apoptosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉White, K -- Grether, M E -- Abrams, J M -- Young, L -- Farrell, K -- Steller, H -- 5 F32 NS08536/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1994 Apr 29;264(5159):677-83.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Brain and Cognitive Sciences, Cambridge, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8171319" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Apoptosis/*genetics ; Base Sequence ; Cloning, Molecular ; DNA Primers ; Drosophila/cytology/embryology/*genetics ; *Drosophila Proteins ; Embryo, Nonmammalian/cytology ; *Genes, Insect ; Models, Genetic ; Molecular Sequence Data ; Mutation ; Nervous System/cytology ; Neurons/cytology ; Peptides/chemistry/*genetics/physiology
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  • 46
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-07-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Friend, S -- New York, N.Y. -- Science. 1994 Jul 15;265(5170):334-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MGH Cancer Center, Massachusetts General Hospital, Charlestown.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8023155" target="_blank"〉PubMed〈/a〉
    Keywords: Crystallization ; Crystallography, X-Ray ; DNA/metabolism ; Genes, p53 ; Hydrogen Bonding ; Mutation ; *Protein Conformation ; Protein Structure, Secondary ; Tumor Suppressor Protein p53/*chemistry/genetics/metabolism
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  • 47
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-04-22
    Description: A cytoplasmically inherited element, [URE3], allows yeast to use ureidosuccinate in the presence of ammonium ion. Chromosomal mutations in the URE2 gene produce the same phenotype. [URE3] depends for its propagation on the URE2 product (Ure2p), a negative regulator of enzymes of nitrogen metabolism. Saccharomyces cerevisiae strains cured of [URE3] with guanidium chloride were shown to return to the [URE3]-carrying state without its introduction from other cells. Overproduction of Ure2p increased the frequency with which a strain became [URE3] by 100-fold. In analogy to mammalian prions, [URE3] may be an altered form of Ure2p that is inactive for its normal function but can convert normal Ure2p to the altered form. The genetic evidence presented here suggests that protein-based inheritance, involving a protein unrelated to the mammalian prion protein, can occur in a microorganism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickner, R B -- New York, N.Y. -- Science. 1994 Apr 22;264(5158):566-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section on Genetics of Simple Eukaryotes, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7909170" target="_blank"〉PubMed〈/a〉
    Keywords: Aspartic Acid/analogs & derivatives/metabolism ; Base Sequence ; Crosses, Genetic ; Fungal Proteins/chemistry/*genetics/metabolism ; Genes, Dominant ; Genes, Fungal ; Genes, Recessive ; Glutathione Peroxidase ; Guanidine ; Guanidines/pharmacology ; Molecular Sequence Data ; Mutation ; Phenotype ; Plasmids ; PrPSc Proteins ; Prions/chemistry/genetics/metabolism ; Saccharomyces cerevisiae/*genetics/metabolism ; *Saccharomyces cerevisiae Proteins
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  • 48
    Publication Date: 1994-09-23
    Description: The proposal that nitric oxide (NO) or its reactant products mediate toxicity in brain remains controversial in part because of the use of nonselective agents that block NO formation in neuronal, glial, and vascular compartments. In mutant mice deficient in neuronal NO synthase (NOS) activity, infarct volumes decreased significantly 24 and 72 hours after middle cerebral artery occlusion, and the neurological deficits were less than those in normal mice. This result could not be accounted for by differences in blood flow or vascular anatomy. However, infarct size in the mutant became larger after endothelial NOS inhibition by nitro-L-arginine administration. Hence, neuronal NO production appears to exacerbate acute ischemic injury, whereas vascular NO protects after middle cerebral artery occlusion. The data emphasize the importance of developing selective inhibitors of the neuronal isoform.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, Z -- Huang, P L -- Panahian, N -- Dalkara, T -- Fishman, M C -- Moskowitz, M A -- NS10828/NS/NINDS NIH HHS/ -- NS2636/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1994 Sep 23;265(5180):1883-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Stroke Research Laboratory, Massachusetts General Hospital, Charlestown 02129.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7522345" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Oxidoreductases/antagonists & inhibitors/deficiency/*metabolism ; Animals ; Arginine/analogs & derivatives/pharmacology ; Brain/enzymology/*metabolism ; Brain Ischemia/complications/*metabolism ; Cerebral Infarction/*etiology ; Cerebrovascular Circulation ; Female ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mutation ; Neurons/*enzymology ; Nitric Oxide/*metabolism ; Nitric Oxide Synthase ; Nitroarginine
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  • 49
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-01-14
    Description: Comparative studies suggest that sex chromosomes begin as ordinary autosomes that happen to carry a major sex determining locus. Over evolutionary time the Y chromosome is selected to stop recombining with the X chromosome, perhaps in response to accumulation of alleles beneficial to the heterogametic but harmful to the homogametic sex. Population genetic theory predicts that a nonrecombining Y chromosome should degenerate. Here this prediction is tested by application of specific selection pressures to Drosophila melanogaster populations. Results demonstrate the decay of a nonrecombining, nascent Y chromosome and the capacity for recombination to ameliorate such decay.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rice, W R -- New York, N.Y. -- Science. 1994 Jan 14;263(5144):230-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California, Santa Cruz 95064.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8284674" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Crosses, Genetic ; Drosophila melanogaster/*genetics/physiology ; Female ; Haplotypes ; Male ; Mutation ; *Recombination, Genetic ; *Y Chromosome
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  • 50
    Publication Date: 1994-03-25
    Description: The Drosophila decapentaplegic (dpp) gene encodes a transforming growth factor-beta (TGF-beta)-like protein that plays a key role in several aspects of development. Transduction of the DPP signal was investigated by cloning of serine-threonine kinase transmembrane receptors from Drosophila because this type of receptor is specific for the TGF-beta-like ligands. Here evidence is provided demonstrating that the Drosophila saxophone (sax) gene, a previously identified female sterile locus, encodes a TGF-beta-like type I receptor. Embryos from sax mothers and dpp embryos exhibit similar mutant phenotypes during early gastrulation, and these two loci exhibit genetic interactions, which suggest that they are utilized in the same pathway. These data suggest that sax encodes a receptor for dpp.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xie, T -- Finelli, A L -- Padgett, R W -- New York, N.Y. -- Science. 1994 Mar 25;263(5154):1756-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Waksman Institute, Rutgers University, Piscataway, NJ 08855-0759.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8134837" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cloning, Molecular ; Drosophila/embryology/*genetics/metabolism ; *Drosophila Proteins ; Embryo, Nonmammalian/metabolism ; Female ; *Genes, Insect ; Insect Hormones/genetics/*metabolism ; Male ; Molecular Sequence Data ; Mutation ; Protein-Serine-Threonine Kinases/chemistry/*genetics/metabolism ; Receptors, Transforming Growth Factor beta/chemistry/*genetics/metabolism ; Signal Transduction ; Transforming Growth Factor beta/genetics/*metabolism
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  • 51
    Publication Date: 1994-06-03
    Description: The Arabidopsis ABI1 locus is essential for a wide spectrum of abscisic acid (ABA) responses throughout plant development. Here, ABI1 was shown to regulate stomatal aperture in leaves and mitotic activity in root meristems. The ABI1 gene was cloned and predicted to encode a signaling protein. Although its carboxyl-terminal domain is related to serine-threonine phosphatase 2C, the ABI1 protein has a unique amino-terminal extension containing an EF hand calcium-binding site. These results suggest that the ABI1 protein is a Ca(2+)-modulated phosphatase and functions to integrate ABA and Ca2+ signals with phosphorylation-dependent response pathways.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leung, J -- Bouvier-Durand, M -- Morris, P C -- Guerrier, D -- Chefdor, F -- Giraudat, J -- New York, N.Y. -- Science. 1994 Jun 3;264(5164):1448-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut des Sciences Vegetales, Centre National de la Recherche Scientifique UPR 40, Gif-sur-Yvette, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7910981" target="_blank"〉PubMed〈/a〉
    Keywords: Abscisic Acid/*pharmacology ; Amino Acid Sequence ; Arabidopsis/chemistry/cytology/*genetics/physiology ; *Arabidopsis Proteins ; Calcium/*metabolism ; Cloning, Molecular ; *Genes, Plant ; Mitosis ; Molecular Sequence Data ; Mutation ; Phenotype ; Phosphoprotein Phosphatases/chemistry/*genetics/*metabolism ; Phosphorylation ; Plants, Genetically Modified ; Polymorphism, Restriction Fragment Length ; Signal Transduction ; Transformation, Genetic
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  • 52
    Publication Date: 1994-02-25
    Description: The T cell antigen receptor (TCR) initiates signals by interacting with cytoplasmic protein tyrosine kinases (PTKs) through a 17-residue sequence motif [called the antigen recognition activation motif (ARAM)] that is contained in the TCR zeta and CD3 chains. TCR stimulation induces the tyrosine phosphorylation of several cellular substrates, including the ARAMs. Lck kinase activity is required for phosphorylation of two conserved tyrosine residues in an ARAM. This phosphorylation leads to the recruitment of a second cytoplasmic PTK, ZAP-70, through both of the ZAP-70 Src homology 2 domains and its phosphorylation. Thus, TCR signal transduction is initiated by the sequential interaction of two PTKs with TCR ARAMs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Iwashima, M -- Irving, B A -- van Oers, N S -- Chan, A C -- Weiss, A -- AR-20684/AR/NIAMS NIH HHS/ -- GM39553/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1994 Feb 25;263(5150):1136-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, University of California, San Francisco 94143.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7509083" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antigens, CD8/metabolism ; Cell Line ; Cytoplasm/enzymology ; Haplorhini ; Humans ; Lymphocyte Specific Protein Tyrosine Kinase p56(lck) ; Membrane Proteins/*metabolism ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Phosphotyrosine ; Protein-Tyrosine Kinases/*metabolism ; Receptors, Antigen, T-Cell/*metabolism ; Signal Transduction ; Tumor Cells, Cultured ; Tyrosine/analogs & derivatives/metabolism ; ZAP-70 Protein-Tyrosine Kinase
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  • 53
    Publication Date: 1994-10-14
    Description: An engineered variant of subtilisin BPN', termed subtiligase, which efficiently ligates esterified peptides in aqueous solution, was used for the complete synthesis of ribonuclease (RNase) A that contains unnatural catalytic residues. Fully active RNase A (124 residues long) was produced in milligram quantities by stepwise ligation of six esterified peptide fragments (each 12 to 30 residues long) at yields averaging 70 percent per ligation. Variants of RNase A were produced in which the catalytic histidines at positions 12 and 119 were substituted with the unnatural amino acid 4-fluorohistidine, which has a pKa of 3.5 compared to 6.8 for histidine. Large changes in the profile of the pH as it affects rate occurred for the single and double mutants with surprisingly little change in the kcat for either the RNA cleavage or hydrolysis steps. The data indicate that these imidazoles function as general acids and bases, but that the proton transfer steps are not rate-limiting when the imidazoles are present in their correct protonation states. These studies indicate the potential of subtiligase for the blockwise synthesis of large proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jackson, D Y -- Burnier, J -- Quan, C -- Stanley, M -- Tom, J -- Wells, J A -- New York, N.Y. -- Science. 1994 Oct 14;266(5183):243-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Protein Engineering, Genentech, Inc., South San Francisco, CA 94080.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7939659" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Esterification ; Histidine/analogs & derivatives/analysis ; Hydrogen-Ion Concentration ; Molecular Sequence Data ; Mutation ; Nucleotides, Cyclic/metabolism ; Protein Engineering/*methods ; Ribonuclease, Pancreatic/*chemical synthesis/chemistry/isolation & purification ; Subtilisins/chemistry/genetics/*metabolism ; Uridine Monophosphate/metabolism
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  • 54
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-09-23
    Description: The functional consequences of single proton transfers occurring in the pore of a cyclic nucleotide-gated channel were observed with patch recording techniques. These results led to three conclusions about the chemical nature of ion binding sites in the conduction pathway: The channel contains two identical titratable sites, even though there are more than two (probably four) identical subunits; the sites are formed by glutamate residues that have a pKa (where K(a) is the acid constant) of 7.6; and protonation of one site does not perturb the pKa of the other. These properties point to an unusual arrangement of carboxyl side-chain residues in the pore of a cation channel.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Root, M J -- MacKinnon, R -- 5 T32 GM083113/GM/NIGMS NIH HHS/ -- GM47400/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1994 Sep 23;265(5180):1852-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Harvard Medical School, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7522344" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Calcium Channels/metabolism ; Catfishes ; Electric Conductivity ; Hydrogen-Ion Concentration ; Ion Channel Gating ; Ion Channels/chemistry/genetics/*metabolism ; Kinetics ; Molecular Sequence Data ; Mutation ; *Protons ; Sodium/metabolism ; Xenopus
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  • 55
    Publication Date: 1994-06-24
    Description: Mice lacking the known subunit of the type I interferon (IFN) receptor were completely unresponsive to type I IFNs, suggesting that this receptor chain is essential for type I IFN-mediated signal transduction. These mice showed no overt anomalies but were unable to cope with viral infections, despite otherwise normal immune responses. Comparison of mice lacking either type I or type II IFN receptors showed that, at least in response to some viruses, both IFN systems are essential for antiviral defense and are functionally nonredundant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Muller, U -- Steinhoff, U -- Reis, L F -- Hemmi, S -- Pavlovic, J -- Zinkernagel, R M -- Aguet, M -- New York, N.Y. -- Science. 1994 Jun 24;264(5167):1918-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Molecular Biology I, University of Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8009221" target="_blank"〉PubMed〈/a〉
    Keywords: Alphavirus Infections/immunology ; Animals ; Antibodies, Viral/biosynthesis ; Disease Susceptibility ; Immunity, Innate ; Interferon Type I/*physiology ; Interferon-gamma/*physiology ; Lymphocytic Choriomeningitis/immunology ; Membrane Proteins ; Mice ; Mutation ; Receptor, Interferon alpha-beta ; Receptors, Interferon/genetics/*physiology ; Rhabdoviridae Infections/immunology ; Semliki forest virus ; Signal Transduction ; T-Lymphocytes/immunology ; Vesicular stomatitis Indiana virus ; Virus Diseases/*immunology
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  • 56
    Publication Date: 1994-11-11
    Description: Interleukin-2 (IL-2) signaling requires the dimerization of the IL-2 receptor beta.(IL-2R beta) and common gamma (gamma c) chains. Mutations of gamma c can result in X-linked severe combined immunodeficiency (XSCID). IL-2, IL-4, IL-7 (whose receptors are known to contain gamma c), and IL-9 (whose receptor is shown here to contain gamma c) induced the tyrosine phosphorylation and activation of the Janus family tyrosine kinases Jak1 and Jak3. Jak1 and Jak3 associated with IL-2R beta and gamma c, respectively; IL-2 induced Jak3-IL-2R beta and increased Jak3-gamma c associations. Truncations of gamma c, and a gamma c, point mutation causing moderate X-linked combined immunodeficiency (XCID), decreased gamma c-Jak3 association. Thus, gamma c mutations in at least some XSCID and XCID patients prevent normal Jak3 activation, suggesting that mutations of Jak3 may result in an XSCID-like phenotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Russell, S M -- Johnston, J A -- Noguchi, M -- Kawamura, M -- Bacon, C M -- Friedmann, M -- Berg, M -- McVicar, D W -- Witthuhn, B A -- Silvennoinen, O -- P30 CA21765/CA/NCI NIH HHS/ -- R01 DK42932/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1994 Nov 11;266(5187):1042-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Immunology, National Heart, Lung, and Blood Institute, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973658" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Enzyme Activation ; Humans ; Interleukin-2/pharmacology ; Janus Kinase 1 ; Janus Kinase 3 ; Mutation ; Phosphorylation ; Point Mutation ; Protein-Tyrosine Kinases/genetics/*metabolism ; Receptors, Interleukin-2/genetics/*metabolism ; Severe Combined Immunodeficiency/genetics/*immunology/metabolism ; Transfection ; Tyrosine/metabolism
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  • 57
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-04-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Danks, D M -- New York, N.Y. -- Science. 1994 Apr 1;264(5155):13-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8140413" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosomes, Human, Pair 2 ; Colorectal Neoplasms, Hereditary Nonpolyposis/*diagnosis/genetics ; *Genetic Testing ; Humans ; Mutation
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  • 58
    Publication Date: 1994-09-23
    Description: The neuromodulator serotonin (5-hydroxytryptamine, 5-HT) has been associated with mood disorders such as depression, anxiety, and impulsive violence. To define the contribution of 5-HT receptor subtypes to behavior, mutant mice lacking the 5-HT1B receptor were generated by homologous recombination. These mice did not exhibit any obvious developmental or behavioral defects. However, the hyperlocomotor effect of the 5-HT1A/1B agonist RU24969 was absent in mutant mice, indicating that this effect is mediated by 5-HT1B receptors. Moreover, when confronted with an intruder, mutant mice attacked the intruder faster and more intensely than did wild-type mice, suggesting the participation of 5-HT1B receptors in aggressive behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saudou, F -- Amara, D A -- Dierich, A -- LeMeur, M -- Ramboz, S -- Segu, L -- Buhot, M C -- Hen, R -- New York, N.Y. -- Science. 1994 Sep 23;265(5180):1875-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Genetique Moleculaire des Eucaryotes du CNRS, U184 de l'INSERM, Faculte de Medecine, Strasbourg, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8091214" target="_blank"〉PubMed〈/a〉
    Keywords: Aggression/*physiology ; Animals ; Brain Chemistry ; Chimera ; Female ; Indoles/pharmacology ; Male ; Mice ; Motor Activity/drug effects ; Mutation ; Pindolol/analogs & derivatives/metabolism ; Receptor, Serotonin, 5-HT1B ; Receptors, Serotonin/analysis/genetics/*physiology ; Recombination, Genetic ; Serotonin Receptor Agonists/pharmacology
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  • 59
    Publication Date: 1994-11-04
    Description: The therapeutic responsiveness of genetically defined tumors expressing or devoid of the p53 tumor suppressor gene was compared in immunocompromised mice. Tumors expressing the p53 gene contained a high proportion of apoptotic cells and typically regressed after treatment with gamma radiation or adriamycin. In contrast, p53-deficient tumors treated with the same regimens continued to enlarge and contained few apoptotic cells. Acquired mutations in p53 were associated with both treatment resistance and relapse in p53-expressing tumors. These results establish that defects in apoptosis, here caused by the inactivation of p53, can produce treatment-resistant tumors and suggest that p53 status may be an important determinant of tumor response to therapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lowe, S W -- Bodis, S -- McClatchey, A -- Remington, L -- Ruley, H E -- Fisher, D E -- Housman, D E -- Jacks, T -- 5R27CA17575/CA/NCI NIH HHS/ -- CA14051/CA/NCI NIH HHS/ -- R01CA40602/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1994 Nov 4;266(5186):807-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Cancer Research, Massachusetts Institute of Technology, Cambridge 02139.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973635" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Doxorubicin/*therapeutic use ; Drug Resistance ; Fibrosarcoma/drug therapy/*genetics/radiotherapy/*therapy ; *Gamma Rays ; *Genes, p53/genetics ; Immunocompromised Host ; Mice ; Mice, Nude ; Mutation ; Neoplasm Recurrence, Local ; Neoplasm Transplantation ; Radiation Tolerance
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  • 60
    Publication Date: 1994-06-03
    Description: Through the study of transcriptional activation in response to interferon alpha (IFN-alpha) and interferon gamma (IFN-gamma), a previously unrecognized direct signal transduction pathway to the nucleus has been uncovered: IFN-receptor interaction at the cell surface leads to the activation of kinases of the Jak family that then phosphorylate substrate proteins called STATs (signal transducers and activators of transcription). The phosphorylated STAT proteins move to the nucleus, bind specific DNA elements, and direct transcription. Recognition of the molecules involved in the IFN-alpha and IFN-gamma pathway has led to discoveries that a number of STAT family members exist and that other polypeptide ligands also use the Jak-STAT molecules in signal transduction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Darnell, J E Jr -- Kerr, I M -- Stark, G R -- New York, N.Y. -- Science. 1994 Jun 3;264(5164):1415-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Cell Biology, Rockefeller University, New York, NY 10021.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8197455" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; DNA-Binding Proteins/*metabolism ; Genes ; Genetic Complementation Test ; Humans ; Interferon-Stimulated Gene Factor 3 ; Interferon-Stimulated Gene Factor 3, gamma Subunit ; Interferon-alpha/*pharmacology ; Interferon-gamma/*pharmacology ; Molecular Sequence Data ; Mutation ; Protein-Tyrosine Kinases/metabolism ; Regulatory Sequences, Nucleic Acid ; *Signal Transduction ; Transcription Factors/*metabolism ; *Transcriptional Activation
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  • 61
    Publication Date: 1994-06-10
    Description: In spite of recent advances in identifying genes causing monogenic human disease, very little is known about the genes involved in polygenic disease. Three families were identified with mutations in the unlinked photoreceptor-specific genes ROM1 and peripherin/RDS, in which only double heterozygotes develop retinitis pigmentosa (RP). These findings indicate that the allelic and nonallelic heterogeneity known to be a feature of monogenic RP is complicated further by interactions between unlinked mutations causing digenic RP. Recognition of the inheritance pattern exemplified by these three families might facilitate the identification of other examples of digenic inheritance in human disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kajiwara, K -- Berson, E L -- Dryja, T P -- EY00169/EY/NEI NIH HHS/ -- EY08683/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1994 Jun 10;264(5165):1604-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Berman-Gund Laboratory for the Study of Retinal Degenerations, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston 02114.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8202715" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Base Sequence ; Electroretinography ; Eye Proteins/chemistry/*genetics ; Female ; Genes, Dominant ; Genes, Recessive ; Genetic Linkage ; Heterozygote ; Humans ; Intermediate Filament Proteins/chemistry/*genetics ; Male ; *Membrane Glycoproteins ; Membrane Proteins/chemistry/*genetics ; Molecular Sequence Data ; Mutation ; *Nerve Tissue Proteins ; Pedigree ; Peripherins ; Retinitis Pigmentosa/*genetics ; Rod Cell Outer Segment/chemistry ; Tetraspanins
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  • 62
    Publication Date: 1994-07-08
    Description: A gene encoding a 35-kilodalton guanosine triphosphate (GTP)-binding protein, Gem, was cloned from mitogen-induced human peripheral blood T cells. Gem and Rad, the product of a gene overexpressed in skeletal muscle in individuals with Type II diabetes, constitute a new family of Ras-related GTP-binding proteins. The distinct structural features of this family include the G3 GTP-binding motif, extensive amino- and carboxyl-terminal extensions beyond the Ras-related domain, and a motif that determines membrane association. Gem was transiently expressed in human peripheral blood T cells in response to mitogenic stimulation; the protein was phosphorylated on tyrosine residues and localized to the cytosolic face of the plasma membrane. Deregulated Gem expression prevented proliferation of normal and transformed 3T3 cells. These results suggest that Gem is a regulatory protein, possibly participating in receptor-mediated signal transduction at the plasma membrane.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maguire, J -- Santoro, T -- Jensen, P -- Siebenlist, U -- Yewdell, J -- Kelly, K -- New York, N.Y. -- Science. 1994 Jul 8;265(5169):241-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7912851" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; CD4-Positive T-Lymphocytes/metabolism ; Cell Death ; Cell Division ; Cell Line ; Cell Line, Transformed ; Cell Membrane/metabolism ; GTP-Binding Proteins/chemistry/genetics/*metabolism ; Genes, ras ; Guanosine Triphosphate/metabolism ; Humans ; Immediate-Early Proteins/chemistry/genetics/*metabolism ; Mice ; Molecular Sequence Data ; *Monomeric GTP-Binding Proteins ; Mutation ; RNA, Messenger/genetics/metabolism ; Transfection ; *ras Proteins
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  • 63
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-12-02
    Description: Maize partitions the sexes into different flowers on the plant, a condition called monoecy, which facilitates outcrossing. Sex determination in maize is a complex process involving an interplay between genetic determinants, the environment, and hormones. Unisexuality of flowers is achieved by the process of selective arrest and abortion of the inappropriate organ primordia within a bisexual floral meristem. Floral organ abortion is associated with the degeneration of cells within an immature primordia. Masculinizing genes are required for gynoecial abortion, feminizing genes arrest stamen development, and both types also control secondary sexual traits involving morphological characteristics of floral tissues. Gibberellins, steroid-like plant hormones, appear to play a pivotal role in the stamen abortion process and the feminization of floral tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dellaporta, S L -- Calderon-Urrea, A -- GM38148/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1994 Dec 2;266(5190):1501-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Yale University, New Haven, CT 06520-8104.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7985019" target="_blank"〉PubMed〈/a〉
    Keywords: *Genes, Plant ; Gibberellins/biosynthesis/metabolism ; Models, Biological ; Mutation ; Zea mays/*genetics/*growth & development
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  • 64
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-03-11
    Description: Transformed plants expressing the 3' two-thirds of the cowpea chlorotic mottle virus (CCMV) capsid gene were inoculated with a CCMV deletion mutant lacking the 3' one-third of the capsid gene. Although the deletion inoculum replicates in inoculated cells, systemic infections occur only if recombination restores a functional capsid gene. Four of 125 inoculated transgenic plants, representing three different transgenic lines, became systemically infected. Analysis of viral RNA confirmed that RNA recombination had united the transgenic messenger RNA and the challenging virus through aberrant homologous recombination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greene, A E -- Allison, R F -- New York, N.Y. -- Science. 1994 Mar 11;263(5152):1423-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Botany and Plant Pathology, Michigan State University, East Lansing 48824-1312.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8128222" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Bromovirus/*genetics/physiology ; Capsid/genetics ; Gene Deletion ; Genes, Viral ; Molecular Sequence Data ; Mutation ; Plants, Genetically Modified/genetics/*microbiology ; Plants, Toxic ; RNA, Messenger/*genetics ; RNA, Viral/*genetics ; *Recombination, Genetic ; Tobacco/genetics/microbiology ; Virus Replication
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 65
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-09-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nowak, R -- New York, N.Y. -- Science. 1994 Sep 23;265(5180):1796-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8091205" target="_blank"〉PubMed〈/a〉
    Keywords: BRCA1 Protein ; Breast Neoplasms/*genetics ; Chromosome Mapping ; *Chromosomes, Human, Pair 17 ; Female ; Genes ; Genes, Tumor Suppressor ; Genetic Predisposition to Disease ; Humans ; Molecular Sequence Data ; Mutation ; Neoplasm Proteins/*genetics ; Transcription Factors/*genetics
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  • 66
    Publication Date: 1994-07-01
    Description: Deletion of the promoter and the first exon of the DNA polymerase beta gene (pol beta) in the mouse germ line results in a lethal phenotype. With the use of the bacteriophage-derived, site-specific recombinase Cre in a transgenic approach, the same mutation can be selectively introduced into a particular cellular compartment-in this case, T cells. The impact of the mutation on those cells can then be analyzed because the mutant animals are viable.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gu, H -- Marth, J D -- Orban, P C -- Mossmann, H -- Rajewsky, K -- New York, N.Y. -- Science. 1994 Jul 1;265(5168):103-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Genetics, University of Cologne, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8016642" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA Nucleotidyltransferases/genetics/metabolism ; DNA Polymerase I/*genetics/metabolism ; Female ; *Gene Deletion ; Genetic Engineering/*methods ; Homozygote ; *Integrases ; Male ; Mice ; Mice, Knockout ; Mice, Transgenic ; Mutation ; Recombination, Genetic ; Stem Cells/enzymology ; T-Lymphocytes/*enzymology ; Transfection ; *Viral Proteins
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  • 67
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-09-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Brien, C -- New York, N.Y. -- Science. 1994 Sep 23;265(5180):1798.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8091206" target="_blank"〉PubMed〈/a〉
    Keywords: Breast Neoplasms/*genetics ; Chromosome Mapping ; *Chromosomes, Human, Pair 13 ; Female ; Genes, Tumor Suppressor ; Genetic Markers ; Genetic Predisposition to Disease ; Humans ; Male ; Mutation
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  • 68
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-10-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nusslein-Volhard, C -- New York, N.Y. -- Science. 1994 Oct 28;266(5185):572-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Entwicklungsbiologie, Tubingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7939708" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drosophila/embryology/*genetics ; *Embryonic Development ; *Genes ; *Genes, Insect ; Mutation ; Point Mutation ; Zebrafish/embryology/*genetics
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  • 69
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-10-07
    Description: RNA editing in the mitochondrion of Trypanosoma brucei extensively alters the adenosine triphosphate synthase (ATPase) subunit 6 precursor messenger RNA (pre-mRNA) by addition of 447 uridines and removal of 28 uridines. In vivo, the guide RNA gA6[14] is thought to specify the deletion of two uridines from the editing site closest to the 3' end. In this study, an in vitro system was developed that accurately removed uridines from this editing site in synthetic ATPase 6 pre-mRNA when gA6[14] and ATP were added. Mutations in both the guide RNA and the pre-mRNA editing site suggest that base-pairing interactions control the number of uridines deleted in vitro. Thus, guide RNAs are required for RNA editing and for the transfer of genetic information to pre-mRNAs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Seiwert, S D -- Stuart, K -- GM 42188/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1994 Oct 7;266(5182):114-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06536-0182.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7524149" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/genetics ; Adenosine Triphosphate/metabolism ; Animals ; Base Composition ; Base Sequence ; Mitochondria/genetics ; Molecular Sequence Data ; Mutation ; RNA/chemistry/*genetics/metabolism ; *RNA Editing ; RNA Precursors/chemistry/*genetics/metabolism ; RNA, Guide/chemistry/*genetics/metabolism ; RNA, Protozoan/chemistry/genetics/metabolism ; Trypanosoma brucei brucei/*genetics/metabolism ; Uridine/metabolism
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  • 70
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-06-17
    Description: Courtship in Drosophila is influenced by a wide variety of genes, in that many different kinds of pleiotropic mutations lead to defective courtship. This may seem to be a truism, but the broad temporal and spatial expression of most of the fly's "neuro genes" makes it difficult to exclude elements of such genes' actions as materially underlying reproductive behavior. "Courtship genes" that seem to play more particular roles were originally identified as sensory, learning, or rhythm mutations; their reproductive abnormalities have been especially informative for revealing components of male or female actions that might otherwise have gone unnoticed. Further behavioral mutations seemed originally to be courtship-specific, turned out not to have that property, and have led to a broadened perspective on the nature and action of Drosophila's sex-determination genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hall, J C -- GM-21473/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1994 Jun 17;264(5166):1702-14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Brandeis University, Waltham, MA 02254-9110.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8209251" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drosophila melanogaster/anatomy & histology/*genetics/physiology ; Female ; *Genes, Insect ; Male ; Mutation ; Nervous System Physiological Phenomena ; Phenotype ; Sex Characteristics ; Sex Determination Analysis ; *Sexual Behavior, Animal
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  • 71
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-03-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Service, R F -- New York, N.Y. -- Science. 1994 Mar 18;263(5153):1559-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8128240" target="_blank"〉PubMed〈/a〉
    Keywords: *Adenosine Triphosphatases ; Bacterial Proteins/genetics ; Chromosome Mapping ; Chromosomes, Human, Pair 2 ; *Chromosomes, Human, Pair 3 ; Colorectal Neoplasms, Hereditary Nonpolyposis/*genetics ; *DNA Repair ; DNA, Complementary/genetics ; *DNA-Binding Proteins ; Databases, Factual ; *Escherichia coli Proteins ; *Genes ; Humans ; MutS Homolog 2 Protein ; Mutation ; Proto-Oncogene Proteins/genetics
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 72
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-04-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J -- New York, N.Y. -- Science. 1994 Apr 15;264(5157):344-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8153613" target="_blank"〉PubMed〈/a〉
    Keywords: Carrier Proteins/*genetics ; Chromosomes, Human, Pair 9 ; Cyclin-Dependent Kinase 4 ; Cyclin-Dependent Kinase Inhibitor p16 ; *Cyclin-Dependent Kinases ; Gene Deletion ; *Genes, Tumor Suppressor ; Genes, p53 ; Humans ; Melanoma/genetics ; Mutation ; Neoplasms/*genetics ; Protein Kinase Inhibitors ; *Proto-Oncogene Proteins ; Tumor Cells, Cultured
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  • 73
    Publication Date: 1994-03-18
    Description: Some cases of hereditary nonpolyposis colorectal cancer (HNPCC) are due to alterations in a mutS-related mismatch repair gene. A search of a large database of expressed sequence tags derived from random complementary DNA clones revealed three additional human mismatch repair genes, all related to the bacterial mutL gene. One of these genes (hMLH1) resides on chromosome 3p21, within 1 centimorgan of markers previously linked to cancer susceptibility in HNPCC kindreds. Mutations of hMLH1 that would disrupt the gene product were identified in such kindreds, demonstrating that this gene is responsible for the disease. These results suggest that defects in any of several mismatch repair genes can cause HNPCC.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Papadopoulos, N -- Nicolaides, N C -- Wei, Y F -- Ruben, S M -- Carter, K C -- Rosen, C A -- Haseltine, W A -- Fleischmann, R D -- Fraser, C M -- Adams, M D -- CA35494/CA/NCI NIH HHS/ -- CA47527/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1994 Mar 18;263(5153):1625-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Johns Hopkins Oncology Center, Baltimore, MD 21231.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8128251" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; *Adenosine Triphosphatases ; Amino Acid Sequence ; Bacterial Proteins/chemistry/*genetics ; Base Sequence ; Carrier Proteins ; Chromosome Mapping ; *Chromosomes, Human, Pair 3 ; Codon ; Colorectal Neoplasms, Hereditary Nonpolyposis/*genetics ; *DNA Repair ; *DNA-Binding Proteins ; *Escherichia coli Proteins ; Female ; Frameshift Mutation ; *Genes ; Genetic Markers ; Humans ; Male ; Molecular Sequence Data ; MutS Homolog 2 Protein ; Mutation ; Neoplasm Proteins/chemistry/*genetics ; Nuclear Proteins ; Open Reading Frames ; Polymerase Chain Reaction ; Proto-Oncogene Proteins/genetics ; Sequence Deletion ; Tumor Cells, Cultured
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  • 74
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-06-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J -- New York, N.Y. -- Science. 1994 Jun 17;264(5166):1663-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8209242" target="_blank"〉PubMed〈/a〉
    Keywords: Amyotrophic Lateral Sclerosis/enzymology/*genetics ; Animals ; *Disease Models, Animal ; Mice ; *Mice, Transgenic ; Mutation ; Superoxide Dismutase/*genetics/metabolism
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  • 75
    Publication Date: 1994-06-10
    Description: Protein tyrosine kinases (PTKs) play an integral role in T cell activation and differentiation. Defects in the Src-family PTKs in mice and in T cell lines have resulted in variable defects in thymic development and in T cell antigen receptor (TCR) signal transduction. Here, three siblings are described with an autosomal recessive form of severe combined immunodeficiency disease (SCID) in which ZAP-70, a non-Src PTK, is absent as a result of mutations in the ZAP-70 gene. This absence is associated with defects in TCR signal transduction, suggesting an important functional role for ZAP-70.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chan, A C -- Kadlecek, T A -- Elder, M E -- Filipovich, A H -- Kuo, W L -- Iwashima, M -- Parslow, T G -- Weiss, A -- AR-20684/AR/NIAMS NIH HHS/ -- GM39553/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1994 Jun 10;264(5165):1599-601.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Medicine, University of California, San Francisco 94143.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8202713" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Calcium/metabolism ; Cell Line ; Child ; Female ; Gene Deletion ; *Genes, Recessive ; Humans ; Lymphocyte Activation ; Male ; Molecular Sequence Data ; Mutation ; Point Mutation ; Protein-Tyrosine Kinases/deficiency/*genetics/metabolism ; Receptors, Antigen, T-Cell/*metabolism ; Severe Combined Immunodeficiency/*genetics/immunology ; *Signal Transduction ; T-Lymphocyte Subsets/immunology ; ZAP-70 Protein-Tyrosine Kinase
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  • 76
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-08-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Flam, F -- New York, N.Y. -- Science. 1994 Aug 19;265(5175):1032-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7520602" target="_blank"〉PubMed〈/a〉
    Keywords: Biochemistry/*methods ; *Biological Evolution ; Biotechnology/*methods ; Drug Design ; Enzymes/*metabolism ; Escherichia coli/enzymology/genetics ; Mutation ; RNA/genetics/*metabolism
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  • 77
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-04-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koshland, D E Jr -- New York, N.Y. -- Science. 1994 Apr 15;264(5157):327.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8153609" target="_blank"〉PubMed〈/a〉
    Keywords: *Drug Resistance, Microbial ; Humans ; Mutation ; Pneumonia, Pneumococcal/microbiology ; Staphylococcal Infections/microbiology ; Staphylococcus/drug effects ; Streptococcus pneumoniae/drug effects ; Vancomycin/pharmacology
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  • 78
    Publication Date: 1994-04-15
    Description: The most frequently occurring resistance of Gram-negative bacteria against tetracyclines is triggered by drug recognition of the Tet repressor. This causes dissociation of the repressor-operator DNA complex and enables expression of the resistance protein TetA, which is responsible for active efflux of tetracycline. The 2.5 angstrom resolution crystal structure of the homodimeric Tet repressor complexed with tetracycline-magnesium reveals detailed drug recognition. The orientation of the operator-binding helix-turn-helix motifs of the repressor is inverted in comparison with other DNA binding proteins. The repressor-drug complex is unable to interact with DNA because the separation of the DNA binding motifs is 5 angstroms wider than usually observed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hinrichs, W -- Kisker, C -- Duvel, M -- Muller, A -- Tovar, K -- Hillen, W -- Saenger, W -- New York, N.Y. -- Science. 1994 Apr 15;264(5157):418-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Kristallographie, Freie Universitat Berlin, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8153629" target="_blank"〉PubMed〈/a〉
    Keywords: Antiporters/*chemistry/genetics/metabolism ; Bacterial Proteins/*chemistry/genetics/metabolism ; Crystallography, X-Ray ; DNA, Bacterial/metabolism ; Helix-Loop-Helix Motifs ; Hydrogen Bonding ; Magnesium/chemistry ; Models, Molecular ; Mutation ; Operator Regions, Genetic ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Repressor Proteins/*chemistry/genetics/metabolism ; Tetracycline/*chemistry/metabolism ; *Tetracycline Resistance/genetics
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  • 79
    Publication Date: 1994-09-09
    Description: The gene aquaporin-1 encodes channel-forming integral protein (CHIP), a member of a large family of water transporters found throughout nature. Three rare individuals were identified who do not express CHIP-associated Colton blood group antigens and whose red cells exhibit low osmotic water permeabilities. Genomic DNA analyses demonstrated that two individuals were homozygous for different nonsense mutations (exon deletion or frameshift), and the third had a missense mutation encoding a nonfunctioning CHIP molecule. Surprisingly, none of the three suffers any apparent clinical consequence, which raises questions about the physiological importance of CHIP and implies that other mechanisms may compensate for its absence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Preston, G M -- Smith, B L -- Zeidel, M L -- Moulds, J J -- Agre, P -- DK32753/DK/NIDDK NIH HHS/ -- HL33991/HL/NHLBI NIH HHS/ -- HL48268/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1994 Sep 9;265(5178):1585-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7521540" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aquaporin 1 ; *Aquaporins ; Base Sequence ; Blood Group Antigens ; Cell Membrane Permeability ; Erythrocyte Membrane/chemistry/physiology ; Exons ; Female ; Homozygote ; Humans ; Ion Channels/blood/*genetics/urine ; Kidney Tubules/chemistry ; Molecular Sequence Data ; Mutation ; Oocytes ; Phenotype ; Polymerase Chain Reaction ; Xenopus
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  • 80
    Publication Date: 1994-07-15
    Description: The three-dimensional structure of the oligomerization domain (residues 319 to 360) of the tumor suppressor p53 has been solved by multidimensional heteronuclear magnetic resonance (NMR) spectroscopy. The domain forms a 20-kilodalton symmetric tetramer with a topology made up from a dimer of dimers. The two primary dimers each comprise two antiparallel helices linked by an antiparallel beta sheet. One beta strand and one helix are contributed from each monomer. The interface between the two dimers forming the tetramer is mediated solely by helix-helix contacts. The overall result is a symmetric, four-helix bundle with adjacent helices oriented antiparallel to each other and with the two antiparallel beta sheets located on opposing faces of the molecule. The tetramer is stabilized not only by hydrophobic interactions within the protein core but also by a number of electrostatic interactions. The implications of the structure of the tetramer for the biological function of p53 are discussed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clore, G M -- Omichinski, J G -- Sakaguchi, K -- Zambrano, N -- Sakamoto, H -- Appella, E -- Gronenborn, A M -- New York, N.Y. -- Science. 1994 Jul 15;265(5170):386-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8023159" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Computer Graphics ; DNA/chemistry/metabolism ; Genes, p53 ; Macromolecular Substances ; Magnetic Resonance Spectroscopy ; Models, Molecular ; Molecular Sequence Data ; Mutation ; *Protein Conformation ; Protein Structure, Secondary ; Tumor Suppressor Protein p53/*chemistry/genetics/metabolism
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  • 81
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-06-03
    Description: The plant hormone abscisic acid (ABA) mediates various responses such as stomatal closure, the maintenance of seed dormancy, and the inhibition of plant growth. All three responses are affected in the ABA-insensitive mutant abi1 of Arabidopsis thaliana, suggesting that an early step in the signaling of ABA is controlled by the ABI1 locus. The ABI1 gene was cloned by chromosome walking, and a missense mutation was identified in the structural gene of the abi1 mutant. The ABI1 gene encodes a protein with high similarity to protein serine or threonine phosphatases of type 2C with the novel feature of a putative Ca2+ binding site. Thus, the control of the phosphorylation state of cell signaling components by the ABI1 product could mediate pleiotropic hormone responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meyer, K -- Leube, M P -- Grill, E -- New York, N.Y. -- Science. 1994 Jun 3;264(5164):1452-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Plant Sciences, Swiss Federal Institute of Technology, Zurich.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8197457" target="_blank"〉PubMed〈/a〉
    Keywords: Abscisic Acid/*pharmacology ; Amino Acid Sequence ; Arabidopsis/enzymology/genetics/*metabolism ; *Arabidopsis Proteins ; Binding Sites ; Calcium/metabolism ; Chromosome Walking ; Cloning, Molecular ; Genes, Plant ; Genetic Markers ; Molecular Sequence Data ; Mutation ; Phosphoprotein Phosphatases/chemistry/genetics/*metabolism ; Plants, Genetically Modified ; *Signal Transduction
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  • 82
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-12-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Modrich, P -- New York, N.Y. -- Science. 1994 Dec 23;266(5193):1959-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Duke University Medical Center, Durham, NC 27710.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7801122" target="_blank"〉PubMed〈/a〉
    Keywords: Base Composition ; Colorectal Neoplasms, Hereditary Nonpolyposis/*genetics ; DNA Damage ; *DNA Repair ; DNA Replication ; Escherichia coli/genetics ; Genome, Bacterial ; Humans ; Mutation ; Neoplasms/*genetics ; Recombination, Genetic
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  • 83
    Publication Date: 1994-12-02
    Description: Extracellular signaling proteins encoded by the hedgehog (hh) multigene family are responsible for the patterning of a variety of embryonic structures in vertebrates and invertebrates. The Drosophila hh gene has now been shown to generate two predominant protein species that are derived by an internal autoproteolytic cleavage of a larger precursor. Mutations that reduced the efficiency of autoproteolysis in vitro diminished precursor cleavage in vivo and also impaired the signaling and patterning activities of the HH protein. The two HH protein species exhibited distinctive biochemical properties and tissue distribution, and these differences suggest a mechanism that could account for the long- and short-range signaling activities of HH in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, J J -- Ekker, S C -- von Kessler, D P -- Porter, J A -- Sun, B I -- Beachy, P A -- New York, N.Y. -- Science. 1994 Dec 2;266(5190):1528-37.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Molecular Biology and Genetics, Johns Hopkins School of Medicine, Baltimore, MD 21205.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7985023" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Line ; Drosophila/embryology/genetics/*metabolism ; *Drosophila Proteins ; Embryo, Nonmammalian/*metabolism ; Embryonic Induction ; Gene Expression Regulation, Developmental ; Genes, Insect ; Hedgehog Proteins ; Models, Biological ; Molecular Sequence Data ; Mutation ; Protein Precursors/chemistry/genetics/metabolism ; *Protein Processing, Post-Translational ; Proteins/chemistry/genetics/*metabolism ; Serine Endopeptidases/chemistry ; *Signal Transduction
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  • 84
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-03-11
    Description: The low-affinity neurotrophin receptor p75 binds all neurotrophins with similar affinity. For elucidation of its function, mice bearing a null mutation in the p75 locus were generated. Examination of sympathetic innervation of target tissues revealed that pineal glands lacked innervation and sweat gland innervation was absent or reduced in particular footpads. The absence of adult innervation reflects the failure of axons to reach these targets during development rather than a target deficit. These results indicate that p75 facilitates development of specific populations of sympathetic neurons, for which it may support axon growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, K F -- Bachman, K -- Landis, S -- Jaenisch, R -- 5 R35 CA44339/CA/NCI NIH HHS/ -- NS 023678/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1994 Mar 11;263(5152):1447-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Cambridge, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8128229" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic Fibers/*physiology/ultrastructure ; Animals ; Axons/physiology/ultrastructure ; Mice ; Mutation ; Pilocarpine/pharmacology ; Pineal Gland/*innervation ; Receptors, Nerve Growth Factor/genetics/*physiology ; Sweat Glands/chemistry/drug effects/*innervation/physiology ; Sweating ; Vasoactive Intestinal Peptide/analysis
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  • 85
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-03-18
    Description: Although signals for retention in the endoplasmic reticulum (ER) have been identified in the cytoplasmic domain of various ER-resident type I transmembrane proteins, the mechanisms responsible for ER retention are still unknown. Yeast and mammalian ER retention motifs interacted specifically in cell lysates with the coatomer, a polypeptide complex implicated in membrane traffic. Mutations that affect the ER retention capacity of the motifs also abolished binding of the coatomer. These results suggest a role for the coatomer in the retrieval of transmembrane proteins to the ER in both yeast and mammals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cosson, P -- Letourneur, F -- New York, N.Y. -- Science. 1994 Mar 18;263(5153):1629-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Basel Institute for Immunology, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8128252" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Transport ; Cell Line ; Coatomer Protein ; Endoplasmic Reticulum/*metabolism ; Fungal Proteins/chemistry/*metabolism ; Golgi Apparatus/metabolism ; *Hexosyltransferases ; Lysine/chemistry/*metabolism ; Membrane Proteins/*metabolism ; Molecular Sequence Data ; Mutation ; Recombinant Fusion Proteins/chemistry/metabolism ; Transferases/chemistry/*metabolism
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  • 86
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-01-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morell, V -- New York, N.Y. -- Science. 1994 Jan 14;263(5144):171-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8284667" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drosophila melanogaster/genetics ; Female ; Humans ; Male ; Mutation ; *Recombination, Genetic ; Sex Determination Analysis ; *Y Chromosome
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  • 87
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-12-09
    Description: A Candida albicans gene (CPH1) was cloned that encodes a protein homologous to Saccharomyces cerevisiae Ste12p, a transcription factor that is the target of the pheromone response mitogen-activated protein kinase cascade. CPH1 complements both the mating defect of ste12 haploids and the filamentous growth defect of ste12/ste12 diploids. Candida albicans strains without a functional CPH1 gene (cph1/cph1) show suppressed hyphal formation on solid medium. However, cph1/cph1 strains can still form hyphae in liquid culture and in response to serum. Thus, filamentous growth may be activated in C. albicans by the same signaling kinase cascade that activates Ste12p in S. cerevisiae; however, alternative pathways may exist in C. albicans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, H -- Kohler, J -- Fink, G R -- GM402661/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1994 Dec 9;266(5191):1723-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Cambridge, MA 02142.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7992058" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Candida albicans/cytology/genetics/*growth & development ; Cloning, Molecular ; Culture Media ; Fungal Proteins/chemistry/*genetics/physiology ; *Genes, Fungal ; Genetic Complementation Test ; Molecular Sequence Data ; Mutation ; Saccharomyces cerevisiae/cytology/genetics/growth & development ; *Saccharomyces cerevisiae Proteins ; Transcription Factors/chemistry/*genetics/physiology
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  • 88
    Publication Date: 1994-02-25
    Description: CD8 is either an alpha alpha homodimer or an alpha beta heterodimer, although most peripheral CD8-lineage T cells express only the CD8 alpha beta heterodimer. The physiological function of CD8 beta was elucidated with mice that were chimeric for the homozygous disruption of the CD8 beta gene. The CD8 beta-1- T cells developed normally to CD4+CD8+ stage, but did not efficiently differentiate further, which resulted in few peripheral CD8+ T cells. The number of peripheral CD8+ T cells was restored by transfer of an exogenous CD8 beta gene into CD8 beta-deficient T cells. Thus, CD8 beta is necessary for the maturation of CD8+ T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nakayama, K -- Negishi, I -- Kuida, K -- Louie, M C -- Kanagawa, O -- Nakauchi, H -- Loh, D Y -- AI 34580/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1994 Feb 25;263(5150):1131-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, MO 63110.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8108731" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD4/genetics ; Antigens, CD8/chemistry/genetics/*physiology ; CD4-CD8 Ratio ; Cell Differentiation ; Cell Line ; Chimera ; Histocompatibility Antigens Class I/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mutation ; Phenotype ; Receptors, Antigen, T-Cell/metabolism ; T-Lymphocyte Subsets/cytology/*immunology/metabolism ; Transfection
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  • 89
    Publication Date: 1994-02-11
    Description: Tumor necrosis factor (TNF), but not lymphotoxin (LT), is directly trypanolytic for salivarian trypanosomes. This activity was not blocked by soluble 55-kilodalton and 75-kilodalton TNF receptors, but was potently inhibited by N,N'-diacetylchitobiose, an oligosaccharide that binds TNF. Comparative sequence analysis of TNF and LT localized the trypanocidal region, and synthetic peptides were trypanolytic. TNF molecules in which the trypanocidal region was mutated or deleted retained tumoricidal activity. Thus, trypanosome-TNF interactions occur via a TNF domain, probably with lectin-like affinity, which is functionally and spatially distinct from the mammalian TNF receptor binding sites.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lucas, R -- Magez, S -- De Leys, R -- Fransen, L -- Scheerlinck, J P -- Rampelberg, M -- Sablon, E -- De Baetselier, P -- New York, N.Y. -- Science. 1994 Feb 11;263(5148):814-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cellular Immunology, University of Brussels, Sint-Genesius-Rode, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8303299" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Binding Sites ; *Disaccharides ; Glucans/metabolism/pharmacology ; L Cells (Cell Line) ; Lectins/chemistry/metabolism/*pharmacology ; Lymphotoxin-alpha/pharmacology ; Mice ; Molecular Sequence Data ; Mutation ; Peptide Fragments/chemistry/pharmacology ; Receptors, Tumor Necrosis Factor/metabolism ; Trypanosoma brucei brucei/*drug effects ; Tumor Necrosis Factor-alpha/chemistry/genetics/metabolism/*pharmacology
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  • 90
    Publication Date: 1994-12-23
    Description: The rolA gene encoded on the Ri plasmid A4 of Agrobacterium rhizogenes is one of the transferred (TL-DNA) genes involved in the pathogenesis of hairy-root disease in plants. The function of the 100-amino acid protein product of rolA is unknown, although its expression causes physiological and developmental alterations in transgenic plants. The rolA gene of A. rhizogenes contains an intron in its untranslated leader region that has features typical of plant pre-messenger RNA introns. Transcription and splicing of the rolA pre-messenger RNA occur in the plant cell.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Magrelli, A -- Langenkemper, K -- Dehio, C -- Schell, J -- Spena, A -- New York, N.Y. -- Science. 1994 Dec 23;266(5193):1986-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Plank-Institut fur Zuchtungsforschung, Cologne, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7528444" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/*genetics/microbiology ; Base Sequence ; Cloning, Molecular ; DNA, Bacterial/genetics ; Genes, Bacterial ; Introns ; Molecular Sequence Data ; Mutation ; Plants, Genetically Modified ; *Plasmids ; RNA Precursors/*genetics ; *RNA Splicing ; RNA, Bacterial/*genetics ; Rhizobium/*genetics ; Transcription, Genetic
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  • 91
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-10-28
    Description: The polarized microtubule cytoskeleton of the Drosophila oocyte directs the localization of the maternal determinants which establish the anterior-posterior (AP) axis of the embryo. Because the formation of this microtubule array is dependent on signals from the follicle cells that surround the oocyte, it has been proposed that AP polarity originates in the follicle cells. Here it is shown that the movement of the oocyte to the posterior of the egg chamber early in oogenesis determines AP polarity in the follicle cell layer, and also in the oocyte. Moreover, the generation of AP asymmetry requires signaling from the germ line to the soma and back again.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gonzalez-Reyes, A -- St Johnston, D -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1994 Oct 28;266(5185):639-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wellcome/CRC Institute, University of Cambridge, England.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7939717" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drosophila ; Embryo, Nonmammalian/*physiology ; Genes, Insect ; *Homeodomain Proteins ; Insect Hormones/genetics ; Microtubules/*physiology ; Models, Biological ; Mutation ; Oocytes/*physiology ; Oogenesis ; RNA, Messenger/genetics/metabolism ; Signal Transduction ; *Trans-Activators
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  • 92
    Publication Date: 1994-08-12
    Description: Mitogen-activated protein (MAP) kinase kinase (MAPKK) activates MAP kinase in a signal transduction pathway that mediates cellular responses to growth and differentiation factors. Oncogenes such as ras, src, raf, and mos have been proposed to transform cells by prolonging the activated state of MAPKK and of components downstream in the signaling pathway. To test this hypothesis, constitutively active MAPKK mutants were designed that had basal activities up to 400 times greater than that of the unphosphorylated wild-type kinase. Expression of these mutants in mammalian cells activated AP-1-regulated transcription. The cells formed transformed foci, grew efficiently in soft agar, and were highly tumorigenic in nude mice. These findings indicate that constitutive activation of MAPKK is sufficient to promote cell transformation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mansour, S J -- Matten, W T -- Hermann, A S -- Candia, J M -- Rong, S -- Fukasawa, K -- Vande Woude, G F -- Ahn, N G -- GM48521/GM/NIGMS NIH HHS/ -- N01-CO-74101/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 1994 Aug 12;265(5174):966-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry, University of Colorado, Boulder 80309.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8052857" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Amino Acid Sequence ; Animals ; Cell Division ; Cell Line ; *Cell Transformation, Neoplastic ; Enzyme Activation ; Genes, mos ; Mice ; Mitogen-Activated Protein Kinase 1 ; Mitogen-Activated Protein Kinase Kinases ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Protein Kinases/genetics/*metabolism ; Protein-Serine-Threonine Kinases/metabolism ; Protein-Tyrosine Kinases/metabolism ; Proto-Oncogene Proteins c-jun/metabolism ; Signal Transduction ; Transfection
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  • 93
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-09-30
    Description: Embryonic axis specification in Drosophila melanogaster is achieved through the asymmetric subcellular localization of morphogenetic molecules within the oocyte. The cappuccino and spire loci are required for both posterior and dorsoventral patterning. Time-lapse confocal microscopic analyses of living egg chambers demonstrated that these mutations induce microtubule reorganization and the premature initiation of microtubule-dependent ooplasmic streaming. As a result, microtubule organization is altered and bulk ooplasm rapidly streams during the developmental stages in which morphogens are normally localized. These changes in oocyte cytoarchitecture and dynamics appear to disrupt axial patterning of the embryo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Theurkauf, W E -- New York, N.Y. -- Science. 1994 Sep 30;265(5181):2093-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Cell Biology, State University of New York, Stony Brook 11794.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8091233" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cytoplasmic Streaming ; Drosophila melanogaster/genetics ; *Genes, Insect ; Microtubules/*physiology/ultrastructure ; Mutation ; Oocytes/*physiology/ultrastructure
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  • 94
    Publication Date: 1994-09-09
    Description: The transcription factor PU.1 is a hematopoietic-specific member of the ets family. Mice carrying a mutation in the PU.1 locus were generated by gene targeting. Homozygous mutant embryos died at a late gestational stage. Mutant embryos produced normal numbers of megakaryocytes and erythroid progenitors, but some showed an impairment of erythroblast maturation. An invariant consequence of the mutation was a multilineage defect in the generation of progenitors for B and T lymphocytes, monocytes, and granulocytes. Thus, the developmental programs of lymphoid and myeloid lineages require a common genetic function likely acting at the level of a multipotential progenitor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scott, E W -- Simon, M C -- Anastasi, J -- Singh, H -- F32 AI08933/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1994 Sep 9;265(5178):1573-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Genetics and Cell Biology, Howard Hughes Medical Institute, University of Chicago, IL 60637.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8079170" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA-Binding Proteins/genetics/*physiology ; Erythropoiesis ; Female ; Gene Rearrangement ; *Hematopoiesis ; Hematopoietic Stem Cells/cytology/*physiology ; Lymphocytes/cytology/physiology ; Macrophages/cytology/physiology ; Male ; Mice ; Mice, Inbred C57BL ; Monocytes/cytology/physiology ; Mutation ; Neutrophils/cytology/physiology ; Retroviridae Proteins, Oncogenic ; Transcription Factors/genetics/*physiology
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  • 95
    Publication Date: 1994-04-29
    Description: The in vivo function of murine granulocyte-macrophage colony-stimulating factor (GM-CSF) was investigated in mice, carrying a null allele of the GM-CSF gene, that were generated by gene targeting techniques in embryonic stem cells. Although steady-state hematopoiesis was unimpaired in homozygous mutant animals, all animals developed the progressive accumulation of surfactant lipids and proteins in the alveolar space, the defining characteristic of the idiopathic human disorder pulmonary alveolar proteinosis. Extensive lymphoid hyperplasia associated with lung airways and blood vessels was also found, yet no infectious agents could be detected. These results demonstrate that GM-CSF is not an essential growth factor for basal hematopoiesis and reveal an unexpected, critical role for GM-CSF in pulmonary homeostasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dranoff, G -- Crawford, A D -- Sadelain, M -- Ream, B -- Rashid, A -- Bronson, R T -- Dickersin, G R -- Bachurski, C J -- Mark, E L -- Whitsett, J A -- HL37569/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1994 Apr 29;264(5159):713-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Cambridge, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8171324" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bronchoalveolar Lavage Fluid/chemistry ; Granulocyte-Macrophage Colony-Stimulating Factor/genetics/*physiology ; Hematopoiesis ; Homeostasis ; Humans ; Hyperplasia ; Lung/*pathology ; Mice ; Mice, Inbred C57BL ; Mutation ; Proteolipids/metabolism ; Pulmonary Alveolar Proteinosis/metabolism/*pathology ; Pulmonary Alveoli/*metabolism/pathology ; Pulmonary Surfactant-Associated Proteins ; Pulmonary Surfactants/*metabolism
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  • 96
    Publication Date: 1994-03-18
    Description: Eclosion, or emergence of adult flies from the pupa, and locomotor activity of adults occur rhythmically in Drosophila melanogaster, with a circadian period of about 24 hours. Here, a clock mutation, timeless (tim), is described that produces arrhythmia for both behaviors. The effects of tim on behavioral rhythms are likely to involve products of the X chromosome-linked clock gene period (per), because tim alters circadian oscillations of per RNA. Genetic mapping places tim on the left arm of the second chromosome between dumpy (dp) and decapentaplegic (dpp).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sehgal, A -- Price, J L -- Man, B -- Young, M W -- New York, N.Y. -- Science. 1994 Mar 18;263(5153):1603-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, National Science Foundation Science and Technology Center for Biological Timing, Rockefeller University, New York, NY 10021.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8128246" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Clocks/*genetics ; Chromosome Mapping ; Circadian Rhythm/*genetics ; Drosophila Proteins ; Drosophila melanogaster/genetics/*physiology ; Gene Expression Regulation ; *Genes, Insect ; Metamorphosis, Biological ; Motor Activity ; Mutagenesis, Insertional ; Mutation ; Nuclear Proteins/*genetics/physiology ; Period Circadian Proteins ; RNA, Messenger/genetics/*metabolism
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  • 97
    Publication Date: 1994-08-19
    Description: DNA sequences for the gene encoding mitochondrial cytochrome oxidase I in a group of rodents (pocket gophers) and their ectoparasites (chewing lice) provide evidence for cospeciation and reveal different rates of molecular evolution in the hosts and their parasites. The overall rate of nucleotide substitution (both silent and replacement changes) is approximately three times higher in lice, and the rate of synonymous substitution (based on analysis of fourfold degenerate sites) is approximately an order of magnitude greater in lice. The difference in synonymous substitution rate between lice and gophers correlates with a difference of similar magnitude in generation times.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hafner, M S -- Sudman, P D -- Villablanca, F X -- Spradling, T A -- Demastes, J W -- Nadler, S A -- New York, N.Y. -- Science. 1994 Aug 19;265(5175):1087-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Museum of Natural Science, Baton Rouge, LA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8066445" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Biological Evolution ; Electron Transport Complex IV/*genetics ; Host-Parasite Interactions ; Likelihood Functions ; Mitochondria/enzymology ; Molecular Sequence Data ; Mutation ; Phthiraptera/classification/enzymology/*genetics/physiology ; Phylogeny ; Rodentia/classification/*genetics/metabolism/*parasitology
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  • 98
    Publication Date: 1994-10-21
    Description: A number of bacterial protein toxins, including adenylate cyclase (AC) toxin from Bordetella pertussis, require the product of an accessory gene in order to express their biological activities. In this study, mass spectrometry was used to demonstrate that activated, wild-type AC toxin was modified by amide-linked palmitoylation on the epsilon-amino group of lysine 983. This modification was absent from a mutant in which the accessory gene had been disrupted. A synthetic palmitoylated peptide corresponding to the tryptic fragment (glutamine 972 to arginine 984) that contained the acylation blocked AC toxin-induced accumulation of adenosine 3',5'-monophosphate, whereas the non-acylated peptide had no effect.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hackett, M -- Guo, L -- Shabanowitz, J -- Hunt, D F -- Hewlett, E L -- DK38942/DK/NIDDK NIH HHS/ -- GM37537/GM/NIGMS NIH HHS/ -- R0-1 AI18000/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1994 Oct 21;266(5184):433-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, University of Virginia, Charlottesville 22901.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7939682" target="_blank"〉PubMed〈/a〉
    Keywords: Acylation ; *Adenylate Cyclase Toxin ; Amino Acid Sequence ; Animals ; Chromatography, High Pressure Liquid ; Cyclic AMP/metabolism ; Hemolysis ; Humans ; Lysine/*metabolism ; Mass Spectrometry ; Molecular Sequence Data ; Mutation ; Palmitates/*metabolism ; Peptide Fragments/chemistry/toxicity ; Sheep ; Tumor Cells, Cultured ; Virulence Factors, Bordetella/chemistry/*metabolism/toxicity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 99
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-06-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Brien, C -- New York, N.Y. -- Science. 1994 Jun 24;264(5167):1844.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8009204" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosome Mapping ; *Chromosomes, Human, Pair 16 ; Chromosomes, Human, Pair 4 ; Humans ; Mutation ; Polycystic Kidney, Autosomal Recessive/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 100
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-09-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J -- New York, N.Y. -- Science. 1994 Sep 2;265(5177):1364-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8073268" target="_blank"〉PubMed〈/a〉
    Keywords: Carrier Proteins/*genetics ; *Chromosomes, Human, Pair 9 ; Cyclin-Dependent Kinase Inhibitor p16 ; Female ; Genes, Tumor Suppressor ; Humans ; Male ; Melanoma/*genetics ; Mutation ; Pedigree ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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