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  • Biochemistry and Biotechnology  (526)
  • Molecular Sequence Data  (475)
  • 2020-2022
  • 1995-1999  (976)
  • 1960-1964  (25)
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  • 1
    Electronic Resource
    Electronic Resource
    CHO DUKX cell lineages preadapted to growth in serum-free suspension culture enable rapid development of cell culture processes for the manufacture of recombinant proteins (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 52 (1996), S. 518-528 
    Details
    ISSN: 0006-3592
    Keywords: CHO cells ; serum-free medium ; adaptation ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Using an adaptive strategy, Chinese hamster ovary (CHO) cell lines were developed that are capable of robust growth in serum-free suspension culture. These preadapted derivatives of the commonly used strain of CHO cells (CHO DUKX), termed PA-DUKX, were used for the introduction and stable expression of several heterologous human genes. A significant advantage of recombinant PA-DUKX cells was their ability to readily resume growth in serum-free suspension culture after transfection and amplification of heterologous genes. Expression of recombinant human proteins in PA-DUKX cells was quantitatively similar to that of lineages generated using conventional CHO DUKX cells. In addition, recombinant human proteins expressed by transfected PA-DUKX lineages were shown to be biochemically and structurally similar to those expressed in CHO DUKX cells, PA-DUKX host cell technology provides an opportunity for reducing the time and resources required to develop large-scale, suspension culture-based manufacturing processes employing serum-free medium. © 1996 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
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  • 2
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    Niemann-Pick C1 disease gene: homology to mediators of cholesterol homeostasis (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-11
    Description: Niemann-Pick type C (NP-C) disease, a fatal neurovisceral disorder, is characterized by lysosomal accumulation of low density lipoprotein (LDL)-derived cholesterol. By positional cloning methods, a gene (NPC1) with insertion, deletion, and missense mutations has been identified in NP-C patients. Transfection of NP-C fibroblasts with wild-type NPC1 cDNA resulted in correction of their excessive lysosomal storage of LDL cholesterol, thereby defining the critical role of NPC1 in regulation of intracellular cholesterol trafficking. The 1278-amino acid NPC1 protein has sequence similarity to the morphogen receptor PATCHED and the putative sterol-sensing regions of SREBP cleavage-activating protein (SCAP) and 3-hydroxy-3-methyl-glutaryl coenzyme A (HMG-CoA) reductase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carstea, E D -- Morris, J A -- Coleman, K G -- Loftus, S K -- Zhang, D -- Cummings, C -- Gu, J -- Rosenfeld, M A -- Pavan, W J -- Krizman, D B -- Nagle, J -- Polymeropoulos, M H -- Sturley, S L -- Ioannou, Y A -- Higgins, M E -- Comly, M -- Cooney, A -- Brown, A -- Kaneski, C R -- Blanchette-Mackie, E J -- Dwyer, N K -- Neufeld, E B -- Chang, T Y -- Liscum, L -- Strauss, J F 3rd -- Ohno, K -- Zeigler, M -- Carmi, R -- Sokol, J -- Markie, D -- O'Neill, R R -- van Diggelen, O P -- Elleder, M -- Patterson, M C -- Brady, R O -- Vanier, M T -- Pentchev, P G -- Tagle, D A -- New York, N.Y. -- Science. 1997 Jul 11;277(5323):228-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9211849" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; *Carrier Proteins ; Cholesterol/*metabolism ; Cholesterol, LDL/metabolism ; Chromosome Mapping ; Chromosomes, Human, Pair 18 ; Cloning, Molecular ; *Drosophila Proteins ; Homeostasis ; Humans ; Hydroxymethylglutaryl CoA Reductases/chemistry ; Insect Proteins/chemistry ; Intracellular Signaling Peptides and Proteins ; Lysosomes/metabolism ; *Membrane Glycoproteins ; Membrane Proteins/chemistry ; Molecular Sequence Data ; Mutation ; Niemann-Pick Diseases/*genetics/metabolism ; Polymorphism, Single-Stranded Conformational ; Proteins/chemistry/*genetics/physiology ; Receptors, Cell Surface/chemistry ; Sequence Homology, Amino Acid ; Transfection
    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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  • 3
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    Complete genome sequence of Treponema pallidum, the syphilis spirochete (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-07-17
    Description: The complete genome sequence of Treponema pallidum was determined and shown to be 1,138,006 base pairs containing 1041 predicted coding sequences (open reading frames). Systems for DNA replication, transcription, translation, and repair are intact, but catabolic and biosynthetic activities are minimized. The number of identifiable transporters is small, and no phosphoenolpyruvate:phosphotransferase carbohydrate transporters were found. Potential virulence factors include a family of 12 potential membrane proteins and several putative hemolysins. Comparison of the T. pallidum genome sequence with that of another pathogenic spirochete, Borrelia burgdorferi, the agent of Lyme disease, identified unique and common genes and substantiates the considerable diversity observed among pathogenic spirochetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fraser, C M -- Norris, S J -- Weinstock, G M -- White, O -- Sutton, G G -- Dodson, R -- Gwinn, M -- Hickey, E K -- Clayton, R -- Ketchum, K A -- Sodergren, E -- Hardham, J M -- McLeod, M P -- Salzberg, S -- Peterson, J -- Khalak, H -- Richardson, D -- Howell, J K -- Chidambaram, M -- Utterback, T -- McDonald, L -- Artiach, P -- Bowman, C -- Cotton, M D -- Fujii, C -- Garland, S -- Hatch, B -- Horst, K -- Roberts, K -- Sandusky, M -- Weidman, J -- Smith, H O -- Venter, J C -- AI31068/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1998 Jul 17;281(5375):375-88.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Genomic Research, Rockville, MD 20850, USA. tpdb@tigr.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9665876" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/genetics/metabolism ; Base Sequence ; Borrelia burgdorferi Group/genetics ; Carrier Proteins/genetics/metabolism ; DNA Repair/genetics ; DNA Replication/genetics ; DNA Restriction Enzymes/genetics ; Energy Metabolism/genetics ; Genes, Bacterial ; Genes, Regulator ; *Genome, Bacterial ; Heat-Shock Response/genetics ; Lipoproteins/genetics ; Membrane Proteins/genetics ; Molecular Sequence Data ; Movement ; Open Reading Frames ; Oxygen Consumption/genetics ; Protein Biosynthesis ; Recombination, Genetic ; Replication Origin ; *Sequence Analysis, DNA ; Transcription, Genetic ; Treponema pallidum/*genetics/metabolism/pathogenicity
    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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  • 4
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    Identification of the tuberous sclerosis gene TSC1 on chromosome 9q34 (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-08
    Description: Tuberous sclerosis complex (TSC) is an autosomal dominant disorder characterized by the widespread development of distinctive tumors termed hamartomas. TSC-determining loci have been mapped to chromosomes 9q34 (TSC1) and 16p13 (TSC2). The TSC1 gene was identified from a 900-kilobase region containing at least 30 genes. The 8.6-kilobase TSC1 transcript is widely expressed and encodes a protein of 130 kilodaltons (hamartin) that has homology to a putative yeast protein of unknown function. Thirty-two distinct mutations were identified in TSC1, 30 of which were truncating, and a single mutation (2105delAAAG) was seen in six apparently unrelated patients. In one of these six, a somatic mutation in the wild-type allele was found in a TSC-associated renal carcinoma, which suggests that hamartin acts as a tumor suppressor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉van Slegtenhorst, M -- de Hoogt, R -- Hermans, C -- Nellist, M -- Janssen, B -- Verhoef, S -- Lindhout, D -- van den Ouweland, A -- Halley, D -- Young, J -- Burley, M -- Jeremiah, S -- Woodward, K -- Nahmias, J -- Fox, M -- Ekong, R -- Osborne, J -- Wolfe, J -- Povey, S -- Snell, R G -- Cheadle, J P -- Jones, A C -- Tachataki, M -- Ravine, D -- Sampson, J R -- Reeve, M P -- Richardson, P -- Wilmer, F -- Munro, C -- Hawkins, T L -- Sepp, T -- Ali, J B -- Ward, S -- Green, A J -- Yates, J R -- Kwiatkowska, J -- Henske, E P -- Short, M P -- Haines, J H -- Jozwiak, S -- Kwiatkowski, D J -- New York, N.Y. -- Science. 1997 Aug 8;277(5327):805-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Clinical Genetics, Erasmus University and University Hospital, Rotterdam, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9242607" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Chromosome Mapping ; Chromosomes, Human, Pair 9/*genetics ; Exons ; *Genes, Tumor Suppressor ; Humans ; Microsatellite Repeats ; Molecular Sequence Data ; Molecular Weight ; Mutation ; Polymerase Chain Reaction ; Proteins/chemistry/*genetics/physiology ; Repressor Proteins/genetics/physiology ; Tuberous Sclerosis/*genetics ; Tumor Suppressor Proteins
    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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  • 5
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    Purification and cloning of aggrecanase-1: a member of the ADAMTS family of proteins (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-05
    Description: We purified, cloned, and expressed aggrecanase, a protease that is thought to be responsible for the degradation of cartilage aggrecan in arthritic diseases. Aggrecanase-1 [a disintegrin and metalloproteinase with thrombospondin motifs-4 (ADAMTS-4)] is a member of the ADAMTS protein family that cleaves aggrecan at the glutamic acid-373-alanine-374 bond. The identification of this protease provides a specific target for the development of therapeutics to prevent cartilage degradation in arthritis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tortorella, M D -- Burn, T C -- Pratta, M A -- Abbaszade, I -- Hollis, J M -- Liu, R -- Rosenfeld, S A -- Copeland, R A -- Decicco, C P -- Wynn, R -- Rockwell, A -- Yang, F -- Duke, J L -- Solomon, K -- George, H -- Bruckner, R -- Nagase, H -- Itoh, Y -- Ellis, D M -- Ross, H -- Wiswall, B H -- Murphy, K -- Hillman, M C Jr -- Hollis, G F -- Newton, R C -- Magolda, R L -- Trzaskos, J M -- Arner, E C -- New York, N.Y. -- Science. 1999 Jun 4;284(5420):1664-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Inflammatory Diseases Research, DuPont Pharmaceuticals Company, Wilmington, DE 19880-0400, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10356395" target="_blank"〉PubMed〈/a〉
    Keywords: ADAM Proteins ; Aggrecans ; Amino Acid Sequence ; Arthritis/drug therapy ; Cartilage/metabolism ; Catalytic Domain ; Cloning, Molecular ; Disintegrins/chemistry/metabolism ; *Extracellular Matrix Proteins ; Humans ; Hydroxamic Acids/pharmacology ; Interleukin-1/pharmacology ; Lectins, C-Type ; Metalloendopeptidases/*chemistry/*genetics/isolation & purification/metabolism ; Molecular Sequence Data ; Procollagen N-Endopeptidase ; Protease Inhibitors/pharmacology ; Protein Sorting Signals ; Proteoglycans/metabolism ; Recombinant Proteins/chemistry/metabolism ; Sequence Analysis
    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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  • 6
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    Alopecia universalis associated with a mutation in the human hairless gene (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-02-21
    Description: There are several forms of hereditary human hair loss, known collectively as alopecias, the molecular bases of which are entirely unknown. A kindred with a rare, recessively inherited type of alopecia universalis was used to search for a locus by homozygosity mapping, and linkage was established in a 6-centimorgan interval on chromosome 8p12 (the logarithm of the odds favoring linkage score was 6.19). The human homolog of a murine gene, hairless, was localized in this interval by radiation hybrid mapping, and a missense mutation was found in affected individuals. Human hairless encodes a putative single zinc finger transcription factor protein with restricted expression in the brain and skin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ahmad, W -- Faiyaz ul Haque, M -- Brancolini, V -- Tsou, H C -- ul Haque, S -- Lam, H -- Aita, V M -- Owen, J -- deBlaquiere, M -- Frank, J -- Cserhalmi-Friedman, P B -- Leask, A -- McGrath, J A -- Peacocke, M -- Ahmad, M -- Ott, J -- Christiano, A M -- HG-00008/HG/NHGRI NIH HHS/ -- P30AR44535/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 1998 Jan 30;279(5351):720-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Dermatology, Columbia University, 630 West 168 Street, VC-15-526, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9445480" target="_blank"〉PubMed〈/a〉
    Keywords: Alopecia/*genetics ; Amino Acid Sequence ; Animals ; Brain/metabolism ; Chromosome Mapping ; Chromosomes, Human, Pair 8 ; DNA-Binding Proteins/genetics ; Female ; Forkhead Transcription Factors ; Gene Expression ; Genes, Recessive ; Homozygote ; Humans ; Male ; Mice ; Mice, Hairless/genetics ; Microsatellite Repeats ; Molecular Sequence Data ; Mutation ; Pedigree ; Proteins/chemistry/*genetics ; Rats ; Sequence Analysis, DNA ; Sequence Homology, Amino Acid ; Skin/metabolism ; Transcription Factors/genetics ; *Zinc Fingers
    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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  • 7
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    Rapid identification of subtype-selective agonists of the somatostatin receptor through combinatorial chemistry (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-10-23
    Description: Nonpeptide agonists of each of the five somatostatin receptors were identified in combinatorial libraries constructed on the basis of molecular modeling of known peptide agonists. In vitro experiments using these selective compounds demonstrated the role of the somatostatin subtype-2 receptor in inhibition of glucagon release from mouse pancreatic alpha cells and the somatostatin subtype-5 receptor as a mediator of insulin secretion from pancreatic beta cells. Both receptors regulated growth hormone release from the rat anterior pituitary gland. The availability of high-affinity, subtype-selective agonists for each of the somatostatin receptors provides a direct approach to defining their physiological functions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rohrer, S P -- Birzin, E T -- Mosley, R T -- Berk, S C -- Hutchins, S M -- Shen, D M -- Xiong, Y -- Hayes, E C -- Parmar, R M -- Foor, F -- Mitra, S W -- Degrado, S J -- Shu, M -- Klopp, J M -- Cai, S J -- Blake, A -- Chan, W W -- Pasternak, A -- Yang, L -- Patchett, A A -- Smith, R G -- Chapman, K T -- Schaeffer, J M -- New York, N.Y. -- Science. 1998 Oct 23;282(5389):737-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biochemistry and Physiology, Merck Research Laboratories, Post Office Box 2000, Rahway, NJ 07065, USA. susanvrohrer@merck.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9784130" target="_blank"〉PubMed〈/a〉
    Keywords: Amides/metabolism/*pharmacology ; Amino Acid Sequence ; Animals ; Cell Line ; Cells, Cultured ; Cricetinae ; Drug Design ; Glucagon/secretion ; Growth Hormone/secretion ; Insulin/secretion ; Islets of Langerhans/drug effects/secretion ; Ligands ; Membrane Proteins ; Mice ; Models, Chemical ; Molecular Sequence Data ; Pituitary Gland, Anterior/drug effects/metabolism ; Rats ; Receptors, Somatostatin/*agonists/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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  • 8
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    The minimal gene complement of Mycoplasma genitalium (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-10-20
    Description: The complete nucleotide sequence (580,070 base pairs) of the Mycoplasma genitalium genome, the smallest known genome of any free-living organism, has been determined by whole-genome random sequencing and assembly. A total of only 470 predicted coding regions were identified that include genes required for DNA replication, transcription and translation, DNA repair, cellular transport, and energy metabolism. Comparison of this genome to that of Haemophilus influenzae suggests that differences in genome content are reflected as profound differences in physiology and metabolic capacity between these two organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fraser, C M -- Gocayne, J D -- White, O -- Adams, M D -- Clayton, R A -- Fleischmann, R D -- Bult, C J -- Kerlavage, A R -- Sutton, G -- Kelley, J M -- Fritchman, R D -- Weidman, J F -- Small, K V -- Sandusky, M -- Fuhrmann, J -- Nguyen, D -- Utterback, T R -- Saudek, D M -- Phillips, C A -- Merrick, J M -- Tomb, J F -- Dougherty, B A -- Bott, K F -- Hu, P C -- Lucier, T S -- Peterson, S N -- Smith, H O -- Hutchison, C A 3rd -- Venter, J C -- AI33161/AI/NIAID NIH HHS/ -- AIO8998/AI/NIAID NIH HHS/ -- HL19171/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1995 Oct 20;270(5235):397-403.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Genomic Research, Rockville, MD 20850, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7569993" target="_blank"〉PubMed〈/a〉
    Keywords: Antigenic Variation/genetics ; Bacterial Proteins/genetics ; Biological Transport/genetics ; DNA Repair/genetics ; DNA Replication/genetics ; DNA, Bacterial/genetics ; Databases, Factual ; Energy Metabolism/genetics ; Genes, Bacterial ; *Genome, Bacterial ; Haemophilus influenzae/genetics ; Molecular Sequence Data ; Mycoplasma/*genetics/immunology/metabolism ; Open Reading Frames ; Protein Biosynthesis ; *Sequence Analysis, DNA ; 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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  • 9
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    A single ataxia telangiectasia gene with a product similar to PI-3 kinase (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-06-23
    Description: A gene, ATM, that is mutated in the autosomal recessive disorder ataxia telangiectasia (AT) was identified by positional cloning on chromosome 11q22-23. AT is characterized by cerebellar degeneration, immunodeficiency, chromosomal instability, cancer predisposition, radiation sensitivity, and cell cycle abnormalities. The disease is genetically heterogeneous, with four complementation groups that have been suspected to represent different genes. ATM, which has a transcript of 12 kilobases, was found to be mutated in AT patients from all complementation groups, indicating that it is probably the sole gene responsible for this disorder. A partial ATM complementary DNA clone of 5.9 kilobases encoded a putative protein that is similar to several yeast and mammalian phosphatidylinositol-3' kinases that are involved in mitogenic signal transduction, meiotic recombination, and cell cycle control. The discovery of ATM should enhance understanding of AT and related syndromes and may allow the identification of AT heterozygotes, who are at increased risk of cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Savitsky, K -- Bar-Shira, A -- Gilad, S -- Rotman, G -- Ziv, Y -- Vanagaite, L -- Tagle, D A -- Smith, S -- Uziel, T -- Sfez, S -- Ashkenazi, M -- Pecker, I -- Frydman, M -- Harnik, R -- Patanjali, S R -- Simmons, A -- Clines, G A -- Sartiel, A -- Gatti, R A -- Chessa, L -- Sanal, O -- Lavin, M F -- Jaspers, N G -- Taylor, A M -- Arlett, C F -- Miki, T -- Weissman, S M -- Lovett, M -- Collins, F S -- Shiloh, Y -- HG00882/HG/NHGRI NIH HHS/ -- NS31763/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1995 Jun 23;268(5218):1749-53.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics, Sackler School of Medicine, Tel Aviv University, Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7792600" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Ataxia Telangiectasia/*genetics ; Ataxia Telangiectasia Mutated Proteins ; Cell Cycle ; Cell Cycle Proteins ; Chromosome Mapping ; Chromosomes, Artificial, Yeast ; *Chromosomes, Human, Pair 11 ; Cloning, Molecular ; DNA, Complementary/genetics ; DNA-Binding Proteins ; Female ; Genetic Complementation Test ; Genetic Predisposition to Disease ; Heterozygote ; Humans ; Male ; Meiosis ; Molecular Sequence Data ; Neoplasms/genetics ; Nucleic Acid Hybridization ; Phosphatidylinositol 3-Kinases ; Phosphotransferases (Alcohol Group Acceptor)/chemistry/*genetics/physiology ; *Protein-Serine-Threonine Kinases ; Proteins/chemistry/*genetics/physiology ; Radiation Tolerance ; Sequence Deletion ; Signal Transduction ; Tumor Suppressor Proteins
    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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  • 10
    Electronic Resource
    Electronic Resource
    Deactivation and conformational changes of cutinase in reverse micelles (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 58 (1998), S. 380-386 
    Details
    ISSN: 0006-3592
    Keywords: reverse micelles ; cutinase ; deactivation ; conformational changes ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Deactivation data and fluorescence intensity changes were used to probe functional and structural stability of cutinase in reverse micelles. A fast deactivation of cutinase in anionic (AOT) reverse micelles occurs due to a reversible denaturation process. The deactivation and denaturation of cutinase is slower in small cationic (CTAB/1-hexanol) reverse micelles and does not occur when the size of the cationic reverse micellar water-pool is larger than cutinase. In both systems, activity loss and denaturation are coupled processes showing the same trend with time. Denaturation is probably caused by the interaction between the enzyme and the surfactant interface of the reversed micelle. When the size of the empty reversed micelle water-pool is smaller than cutinase (at W0 5, with W0 being the water:surfactant concentration ratio) a three-state model describes denaturation and deactivation with an intermediate conformational state existing on the path from native to denaturated cutinase. This intermediate was clearly detected by an increase in activity and shows only minor conformational changes relative to the native state. At W0 20, the size of the empty water-pool was larger than cutinase and the data was well described by a two-state model for both anionic and cationic reverse micelles. For AOT reverse micelles at W0 20, the intermediate state became a transient state and the deactivation and denaturation were described by a two-state model in which only native and denaturated cutinase were present. For CTAB/1-hexanol reverse micelles at W0 20, the native cutinase was in equilibrium with an intermediate state, which did not suffer denaturation. 1-Hexanol showed a stabilizing effect on cutinase in reverse micelles, contributing to the higher stabilities observed in the cationic CTAB/1-hexanol reverse micelles. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 58:380-386, 1998.
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