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  • 550 - Earth sciences  (1,064)
  • Mutation
  • 2005-2009  (1,242)
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  • 11
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    MC1R germline variants confer risk for BRAF-mutant melanoma (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-07-01
    Description: Germline variants in MC1R, the gene encoding the melanocortin-1 receptor, and sun exposure increase risk for melanoma in Caucasians. The majority of melanomas that occur on skin with little evidence of chronic sun-induced damage (non-CSD melanoma) have mutations in the BRAF oncogene, whereas in melanomas on skin with marked CSD (CSD melanoma) these mutations are less frequent. In two independent Caucasian populations, we show that MC1R variants are strongly associated with BRAF mutations in non-CSD melanomas. In this tumor subtype, the risk for melanoma associated with MC1R is due to an increase in risk of developing melanomas with BRAF mutations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Landi, Maria Teresa -- Bauer, Jurgen -- Pfeiffer, Ruth M -- Elder, David E -- Hulley, Benjamin -- Minghetti, Paola -- Calista, Donato -- Kanetsky, Peter A -- Pinkel, Daniel -- Bastian, Boris C -- K07 CA80700/CA/NCI NIH HHS/ -- P01 CA025874-25-A1/CA/NCI NIH HHS/ -- R01 CA5558/CA/NCI NIH HHS/ -- R01 CA94963/CA/NCI NIH HHS/ -- R33 CA95300/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2006 Jul 28;313(5786):521-2. Epub 2006 Jun 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Bethesda, MD 20892, USA. landim@mail.nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16809487" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Aged ; Alleles ; Case-Control Studies ; Female ; Genetic Predisposition to Disease ; Genetic Variation ; *Germ-Line Mutation ; Humans ; Italy ; Male ; Melanoma/classification/*genetics/pathology ; Middle Aged ; Mutation ; Odds Ratio ; Proto-Oncogene Proteins B-raf/*genetics ; Receptor, Melanocortin, Type 1/*genetics ; Skin/pathology/*radiation effects ; Skin Neoplasms/classification/*genetics/pathology ; Sunlight/*adverse effects ; United States
    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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  • 12
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    Genome-wide detection of polymorphisms at nucleotide resolution with a single DNA microarray (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-03-11
    Description: A central challenge of genomics is to detect, simply and inexpensively, all differences in sequence among the genomes of individual members of a species. We devised a system to detect all single-nucleotide differences between genomes with the use of data from a single hybridization to a whole-genome DNA microarray. This allowed us to detect a variety of spontaneous single-base pair substitutions, insertions, and deletions, and most (〉90%) of the approximately 30,000 known single-nucleotide polymorphisms between two Saccharomyces cerevisiae strains. We applied this approach to elucidate the genetic basis of phenotypic variants and to identify the small number of single-base pair changes accumulated during experimental evolution of yeast.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gresham, David -- Ruderfer, Douglas M -- Pratt, Stephen C -- Schacherer, Joseph -- Dunham, Maitreya J -- Botstein, David -- Kruglyak, Leonid -- P50 GM071508/GM/NIGMS NIH HHS/ -- R01 GM046406/GM/NIGMS NIH HHS/ -- R37 MH059520/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2006 Mar 31;311(5769):1932-6. Epub 2006 Mar 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA. dgresham@genomics.princeton.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16527929" target="_blank"〉PubMed〈/a〉
    Keywords: Directed Molecular Evolution ; Genes, Fungal ; *Genome, Fungal ; Genomics ; Mutation ; Nucleic Acid Hybridization ; *Oligonucleotide Array Sequence Analysis ; Phenotype ; Point Mutation ; *Polymorphism, Single Nucleotide ; Saccharomyces cerevisiae/*genetics/physiology ; Sequence Deletion ; Suppression, Genetic
    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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  • 13
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    An X chromosome gene, WTX, is commonly inactivated in Wilms tumor (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-01-06
    Description: Wilms tumor is a pediatric kidney cancer associated with inactivation of the WT1 tumor-suppressor gene in 5 to 10% of cases. Using a high-resolution screen for DNA copy-number alterations in Wilms tumor, we identified somatic deletions targeting a previously uncharacterized gene on the X chromosome. This gene, which we call WTX, is inactivated in approximately one-third of Wilms tumors (15 of 51 tumors). Tumors with mutations in WTX lack WT1 mutations, and both genes share a restricted temporal and spatial expression pattern in normal renal precursors. In contrast to biallelic inactivation of autosomal tumor-suppressor genes, WTX is inactivated by a monoallelic "single-hit" event targeting the single X chromosome in tumors from males and the active X chromosome in tumors from females.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rivera, Miguel N -- Kim, Woo Jae -- Wells, Julie -- Driscoll, David R -- Brannigan, Brian W -- Han, Moonjoo -- Kim, James C -- Feinberg, Andrew P -- Gerald, William L -- Vargas, Sara O -- Chin, Lynda -- Iafrate, A John -- Bell, Daphne W -- Haber, Daniel A -- P01-CA101942/CA/NCI NIH HHS/ -- R37 CA054358/CA/NCI NIH HHS/ -- R37 CA054358-17/CA/NCI NIH HHS/ -- R37-CA058596/CA/NCI NIH HHS/ -- T32-CA009216/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2007 Feb 2;315(5812):642-5. Epub 2007 Jan 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Massachusetts General Hospital Cancer Center, Harvard Medical Center, Boston, MA 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17204608" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Alleles ; Amino Acid Sequence ; Animals ; Cell Line ; Chromosome Deletion ; Chromosomes, Human, X/*genetics ; Female ; Gene Expression ; *Gene Silencing ; *Genes, Wilms Tumor ; Heterozygote ; Humans ; In Situ Hybridization, Fluorescence ; Kidney/embryology/metabolism ; Kidney Neoplasms/*genetics ; Male ; Mice ; Mice, Inbred C57BL ; Molecular Sequence Data ; Mutation ; Point Mutation ; Tumor Suppressor Proteins/chemistry/*genetics/physiology ; Wilms Tumor/*genetics ; beta Catenin/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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  • 14
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    A single IGF1 allele is a major determinant of small size in dogs (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-04-07
    Description: The domestic dog exhibits greater diversity in body size than any other terrestrial vertebrate. We used a strategy that exploits the breed structure of dogs to investigate the genetic basis of size. First, through a genome-wide scan, we identified a major quantitative trait locus (QTL) on chromosome 15 influencing size variation within a single breed. Second, we examined genetic variation in the 15-megabase interval surrounding the QTL in small and giant breeds and found marked evidence for a selective sweep spanning a single gene (IGF1), encoding insulin-like growth factor 1. A single IGF1 single-nucleotide polymorphism haplotype is common to all small breeds and nearly absent from giant breeds, suggesting that the same causal sequence variant is a major contributor to body size in all small dogs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2789551/" 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/PMC2789551/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sutter, Nathan B -- Bustamante, Carlos D -- Chase, Kevin -- Gray, Melissa M -- Zhao, Keyan -- Zhu, Lan -- Padhukasahasram, Badri -- Karlins, Eric -- Davis, Sean -- Jones, Paul G -- Quignon, Pascale -- Johnson, Gary S -- Parker, Heidi G -- Fretwell, Neale -- Mosher, Dana S -- Lawler, Dennis F -- Satyaraj, Ebenezer -- Nordborg, Magnus -- Lark, K Gordon -- Wayne, Robert K -- Ostrander, Elaine A -- 063056/PHS HHS/ -- 5T32 HG002536/HG/NHGRI NIH HHS/ -- P50 HG002790/HG/NHGRI NIH HHS/ -- R01 GM063056/GM/NIGMS NIH HHS/ -- R01 GM063056-06/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2007 Apr 6;316(5821):112-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Human Genome Research Institute, Building 50, Room 5349, 50 South Drive MSC 8000, Bethesda, MD 20892-8000, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17412960" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Body Size/genetics ; Breeding ; Dogs/*anatomy & histology/*genetics ; Exons ; Genetic Variation ; Genotype ; Haplotypes ; Heterozygote ; Insulin-Like Growth Factor I/*genetics/metabolism ; Introns ; Mutation ; *Polymorphism, Single Nucleotide ; Quantitative Trait Loci ; Selection, Genetic ; Sequence Analysis, DNA
    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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  • 15
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    Serine-7 of the RNA polymerase II CTD is specifically required for snRNA gene expression (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-12-15
    Description: RNA polymerase II (Pol II) transcribes genes that encode proteins and noncoding small nuclear RNAs (snRNAs). The carboxyl-terminal repeat domain (CTD) of the largest subunit of mammalian RNA Pol II, comprising tandem repeats of the heptapeptide consensus Tyr1-Ser2-Pro3-Thr4-Ser5-Pro6-Ser7, is required for expression of both gene types. We show that mutation of serine-7 to alanine causes a specific defect in snRNA gene expression. We also present evidence that phosphorylation of serine-7 facilitates interaction with the snRNA gene-specific Integrator complex. These findings assign a biological function to this amino acid and highlight a gene type-specific requirement for a residue within the CTD heptapeptide, supporting the existence of a CTD code.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2263945/" 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/PMC2263945/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Egloff, Sylvain -- O'Reilly, Dawn -- Chapman, Rob D -- Taylor, Alice -- Tanzhaus, Katrin -- Pitts, Laura -- Eick, Dirk -- Murphy, Shona -- 072107/Wellcome Trust/United Kingdom -- 081312/Wellcome Trust/United Kingdom -- G0400653/Medical Research Council/United Kingdom -- G0400653(71330)/Medical Research Council/United Kingdom -- G9826944/Medical Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2007 Dec 14;318(5857):1777-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18079403" target="_blank"〉PubMed〈/a〉
    Keywords: Alanine ; Amino Acid Sequence ; Cell Line ; Consensus Sequence ; *Gene Expression Regulation ; Heterogeneous-Nuclear Ribonucleoproteins/genetics ; Humans ; Mutation ; Oligopeptides/chemistry/metabolism ; Phosphorylation ; Protein Structure, Tertiary ; Protein Subunits/genetics/metabolism ; RNA Polymerase II/chemistry/genetics/*metabolism ; RNA Processing, Post-Transcriptional ; RNA, Messenger/genetics/metabolism ; RNA, Small Nuclear/*genetics ; Serine/*metabolism ; Templates, Genetic ; *Transcription, Genetic
    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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    An inhibitor of FtsZ with potent and selective anti-staphylococcal activity (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-09-20
    Description: FtsZ is an essential bacterial guanosine triphosphatase and homolog of mammalian beta-tubulin that polymerizes and assembles into a ring to initiate cell division. We have created a class of small synthetic antibacterials, exemplified by PC190723, which inhibits FtsZ and prevents cell division. PC190723 has potent and selective in vitro bactericidal activity against staphylococci, including methicillin- and multi-drug-resistant Staphylococcus aureus. The putative inhibitor-binding site of PC190723 was mapped to a region of FtsZ that is analogous to the Taxol-binding site of tubulin. PC190723 was efficacious in an in vivo model of infection, curing mice infected with a lethal dose of S. aureus. The data validate FtsZ as a target for antibacterial intervention and identify PC190723 as suitable for optimization into a new anti-staphylococcal therapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haydon, David J -- Stokes, Neil R -- Ure, Rebecca -- Galbraith, Greta -- Bennett, James M -- Brown, David R -- Baker, Patrick J -- Barynin, Vladimir V -- Rice, David W -- Sedelnikova, Sveta E -- Heal, Jonathan R -- Sheridan, Joseph M -- Aiwale, Sachin T -- Chauhan, Pramod K -- Srivastava, Anil -- Taneja, Amit -- Collins, Ian -- Errington, Jeff -- Czaplewski, Lloyd G -- Biotechnology and Biological Sciences Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2008 Sep 19;321(5896):1673-5. doi: 10.1126/science.1159961.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Prolysis, Begbroke Science Park, Oxfordshire OX5 1PF, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18801997" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Anti-Bacterial Agents/*pharmacology/therapeutic use ; Bacillus subtilis/chemistry/*drug effects/genetics ; Bacterial Proteins/*antagonists & inhibitors/chemistry/genetics/metabolism ; Binding Sites ; Cell Division/drug effects ; Crystallography, X-Ray ; Cytoskeletal Proteins/*antagonists & inhibitors/chemistry/genetics/metabolism ; Drug Resistance, Bacterial/genetics ; Drug Resistance, Multiple, Bacterial ; Ligands ; Methicillin Resistance ; Mice ; Microbial Sensitivity Tests ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Protein Conformation ; Pyridines/chemistry/metabolism/*pharmacology/therapeutic use ; Staphylococcal Infections/*drug therapy ; Staphylococcus aureus/chemistry/*drug effects ; Thiazoles/chemistry/metabolism/*pharmacology/therapeutic use ; Tubulin/chemistry/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 17
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    Abscisic acid inhibits type 2C protein phosphatases via the PYR/PYL family of START proteins (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-02
    Description: Type 2C protein phosphatases (PP2Cs) are vitally involved in abscisic acid (ABA) signaling. Here, we show that a synthetic growth inhibitor called pyrabactin functions as a selective ABA agonist. Pyrabactin acts through PYRABACTIN RESISTANCE 1 (PYR1), the founding member of a family of START proteins called PYR/PYLs, which are necessary for both pyrabactin and ABA signaling in vivo. We show that ABA binds to PYR1, which in turn binds to and inhibits PP2Cs. We conclude that PYR/PYLs are ABA receptors functioning at the apex of a negative regulatory pathway that controls ABA signaling by inhibiting PP2Cs. Our results illustrate the power of the chemical genetic approach for sidestepping genetic redundancy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2827199/" 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/PMC2827199/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Park, Sang-Youl -- Fung, Pauline -- Nishimura, Noriyuki -- Jensen, Davin R -- Fujii, Hiroaki -- Zhao, Yang -- Lumba, Shelley -- Santiago, Julia -- Rodrigues, Americo -- Chow, Tsz-Fung F -- Alfred, Simon E -- Bonetta, Dario -- Finkelstein, Ruth -- Provart, Nicholas J -- Desveaux, Darrell -- Rodriguez, Pedro L -- McCourt, Peter -- Zhu, Jian-Kang -- Schroeder, Julian I -- Volkman, Brian F -- Cutler, Sean R -- 01GM59138/GM/NIGMS NIH HHS/ -- R01 GM060396/GM/NIGMS NIH HHS/ -- R01 GM060396-08/GM/NIGMS NIH HHS/ -- R01GM060396/GM/NIGMS NIH HHS/ -- U54GM074901/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 May 22;324(5930):1068-71. doi: 10.1126/science.1173041. Epub 2009 Apr 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Botany and Plant Sciences, University of California at Riverside, Riverside, CA 92521, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19407142" target="_blank"〉PubMed〈/a〉
    Keywords: Abscisic Acid/agonists/*metabolism ; Arabidopsis/enzymology/genetics/growth & development/*metabolism ; Arabidopsis Proteins/*antagonists & inhibitors/genetics/*metabolism ; Genes, Plant ; Germination/drug effects ; Ligands ; Membrane Transport Proteins/genetics/*metabolism ; Mutation ; Naphthalenes/chemistry/metabolism/*pharmacology ; Phosphoprotein Phosphatases/*antagonists & inhibitors/metabolism ; Protein Binding ; Recombinant Fusion Proteins/metabolism ; Seeds/growth & development/metabolism ; Signal Transduction ; Sulfonamides/chemistry/metabolism/*pharmacology ; Two-Hybrid System Techniques
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 18
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    Histone H2A.Z and DNA methylation are mutually antagonistic chromatin marks (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-09-26
    Description: Eukaryotic chromatin is separated into functional domains differentiated by post-translational histone modifications, histone variants and DNA methylation. Methylation is associated with repression of transcriptional initiation in plants and animals, and is frequently found in transposable elements. Proper methylation patterns are crucial for eukaryotic development, and aberrant methylation-induced silencing of tumour suppressor genes is a common feature of human cancer. In contrast to methylation, the histone variant H2A.Z is preferentially deposited by the Swr1 ATPase complex near 5' ends of genes where it promotes transcriptional competence. How DNA methylation and H2A.Z influence transcription remains largely unknown. Here we show that in the plant Arabidopsis thaliana regions of DNA methylation are quantitatively deficient in H2A.Z. Exclusion of H2A.Z is seen at sites of DNA methylation in the bodies of actively transcribed genes and in methylated transposons. Mutation of the MET1 DNA methyltransferase, which causes both losses and gains of DNA methylation, engenders opposite changes (gains and losses) in H2A.Z deposition, whereas mutation of the PIE1 subunit of the Swr1 complex that deposits H2A.Z leads to genome-wide hypermethylation. Our findings indicate that DNA methylation can influence chromatin structure and effect gene silencing by excluding H2A.Z, and that H2A.Z protects genes from DNA methylation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2877514/" 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/PMC2877514/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zilberman, Daniel -- Coleman-Derr, Devin -- Ballinger, Tracy -- Henikoff, Steven -- Howard Hughes Medical Institute/ -- England -- Nature. 2008 Nov 6;456(7218):125-9. doi: 10.1038/nature07324. Epub 2008 Sep 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of California, 211 Koshland Hall, Berkeley, California 94720, USA. daniel.zilberman@nature.berkely.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18815594" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/enzymology/*genetics/*metabolism ; Arabidopsis Proteins/genetics/metabolism ; Chromatin/genetics/*metabolism ; DNA (Cytosine-5-)-Methyltransferase/genetics/metabolism ; *DNA Methylation ; Gene Expression Regulation, Plant ; Gene Silencing ; Histones/*metabolism ; Mutation ; Transcription Factors/genetics/metabolism ; Transcription, Genetic
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 19
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    Prominin 1 marks intestinal stem cells that are susceptible to neoplastic transformation (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-12-19
    Description: Cancer stem cells are remarkably similar to normal stem cells: both self-renew, are multipotent and express common surface markers, for example, prominin 1 (PROM1, also called CD133). What remains unclear is whether cancer stem cells are the direct progeny of mutated stem cells or more mature cells that reacquire stem cell properties during tumour formation. Answering this question will require knowledge of whether normal stem cells are susceptible to cancer-causing mutations; however, this has proved difficult to test because the identity of most adult tissue stem cells is not known. Here, using an inducible Cre, nuclear LacZ reporter allele knocked into the Prom1 locus (Prom1(C-L)), we show that Prom1 is expressed in a variety of developing and adult tissues. Lineage-tracing studies of adult Prom1(+/C-L) mice containing the Rosa26-YFP reporter allele showed that Prom1(+) cells are located at the base of crypts in the small intestine, co-express Lgr5 (ref. 2), generate the entire intestinal epithelium, and are therefore the small intestinal stem cell. Prom1 was reported recently to mark cancer stem cells of human intestinal tumours that arise frequently as a consequence of aberrant wingless (Wnt) signalling. Activation of endogenous Wnt signalling in Prom1(+/C-L) mice containing a Cre-dependent mutant allele of beta-catenin (Ctnnb1(lox(ex3))) resulted in a gross disruption of crypt architecture and a disproportionate expansion of Prom1(+) cells at the crypt base. Lineage tracing demonstrated that the progeny of these cells replaced the mucosa of the entire small intestine with neoplastic tissue that was characterized by focal high-grade intraepithelial neoplasia and crypt adenoma formation. Although all neoplastic cells arose from Prom1(+) cells in these mice, only 7% of tumour cells retained Prom1 expression. Our data indicate that Prom1 marks stem cells in the adult small intestine that are susceptible to transformation into tumours retaining a fraction of mutant Prom1(+) tumour cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2633030/" 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/PMC2633030/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhu, Liqin -- Gibson, Paul -- Currle, D Spencer -- Tong, Yiai -- Richardson, Robert J -- Bayazitov, Ildar T -- Poppleton, Helen -- Zakharenko, Stanislav -- Ellison, David W -- Gilbertson, Richard J -- P01 CA096832/CA/NCI NIH HHS/ -- P01 CA096832-01A10003/CA/NCI NIH HHS/ -- P01CA96832/CA/NCI NIH HHS/ -- P30CA021765/CA/NCI NIH HHS/ -- R01 CA129541/CA/NCI NIH HHS/ -- R01 CA129541-01/CA/NCI NIH HHS/ -- R01 CA129541-02/CA/NCI NIH HHS/ -- R01 MH079079/MH/NIMH NIH HHS/ -- R01 MH079079-01A2/MH/NIMH NIH HHS/ -- R01 MH079079-02/MH/NIMH NIH HHS/ -- R01 MH079079-03/MH/NIMH NIH HHS/ -- R01 MH079079-04/MH/NIMH NIH HHS/ -- R01 MH079079-05/MH/NIMH NIH HHS/ -- R01CA129541/CA/NCI NIH HHS/ -- England -- Nature. 2009 Jan 29;457(7229):603-7. doi: 10.1038/nature07589. Epub 2008 Dec 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Neurobiology, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, Tennessee 38105, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19092805" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoma/genetics/metabolism/pathology ; Animals ; Antigens, CD/analysis/genetics/*metabolism ; Biomarkers/analysis/metabolism ; *Cell Lineage ; *Cell Transformation, Neoplastic ; Cells, Cultured ; Genes, Reporter/genetics ; Glycoproteins/analysis/genetics/*metabolism ; Intestinal Neoplasms/genetics/metabolism/pathology ; Intestine, Small/*cytology/pathology ; Mice ; Mutation ; Neoplasm Transplantation ; Neoplastic Stem Cells/cytology/*metabolism/pathology ; Peptides/analysis/genetics/*metabolism ; Receptors, G-Protein-Coupled/metabolism ; Stem Cells/cytology/*metabolism/*pathology ; Transplantation, Heterologous ; Wnt Proteins/metabolism ; beta Catenin/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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    Subcellular homeostasis of phytohormone auxin is mediated by the ER-localized PIN5 transporter (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-06-10
    Description: The plant signalling molecule auxin provides positional information in a variety of developmental processes by means of its differential distribution (gradients) within plant tissues. Thus, cellular auxin levels often determine the developmental output of auxin signalling. Conceptually, transmembrane transport and metabolic processes regulate the steady-state levels of auxin in any given cell. In particular, PIN auxin-efflux-carrier-mediated, directional transport between cells is crucial for generating auxin gradients. Here we show that Arabidopsis thaliana PIN5, an atypical member of the PIN gene family, encodes a functional auxin transporter that is required for auxin-mediated development. PIN5 does not have a direct role in cell-to-cell transport but regulates intracellular auxin homeostasis and metabolism. PIN5 localizes, unlike other characterized plasma membrane PIN proteins, to endoplasmic reticulum (ER), presumably mediating auxin flow from the cytosol to the lumen of the ER. The ER localization of other PIN5-like transporters (including the moss PIN) indicates that the diversification of PIN protein functions in mediating auxin homeostasis at the ER, and cell-to-cell auxin transport at the plasma membrane, represent an ancient event during the evolution of land plants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mravec, Jozef -- Skupa, Petr -- Bailly, Aurelien -- Hoyerova, Klara -- Krecek, Pavel -- Bielach, Agnieszka -- Petrasek, Jan -- Zhang, Jing -- Gaykova, Vassilena -- Stierhof, York-Dieter -- Dobrev, Petre I -- Schwarzerova, Katerina -- Rolcik, Jakub -- Seifertova, Daniela -- Luschnig, Christian -- Benkova, Eva -- Zazimalova, Eva -- Geisler, Markus -- Friml, Jiri -- P 19585/Austrian Science Fund FWF/Austria -- England -- Nature. 2009 Jun 25;459(7250):1136-40. doi: 10.1038/nature08066. Epub 2009 Jun 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Systems Biology, VIB and Department of Plant Biotechnology and Genetics, Ghent University, 9052 Gent, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19506555" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/classification/genetics/metabolism/*physiology ; Arabidopsis Proteins/genetics/*metabolism ; Cells, Cultured ; Endoplasmic Reticulum/*metabolism ; Gene Knockout Techniques ; Homeostasis/*physiology ; Indoleacetic Acids/*metabolism ; Membrane Transport Proteins/genetics/*metabolism ; Mutation ; Phenotype ; Phylogeny ; Plant Growth Regulators/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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