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  • Mutation  (52)
  • American Association for the Advancement of Science (AAAS)  (50)
  • Springer  (2)
  • American Geophysical Union
  • 2005-2009  (38)
  • 1985-1989  (14)
  • 2005  (38)
  • 1987  (14)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (50)
  • Springer  (2)
  • American Geophysical Union
Years
  • 2005-2009  (38)
  • 1985-1989  (14)
Year
  • 1
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    SLC24A5, a putative cation exchanger, affects pigmentation in zebrafish and humans (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-12-17
    Description: Lighter variations of pigmentation in humans are associated with diminished number, size, and density of melanosomes, the pigmented organelles of melanocytes. Here we show that zebrafish golden mutants share these melanosomal changes and that golden encodes a putative cation exchanger slc24a5 (nckx5) that localizes to an intracellular membrane, likely the melanosome or its precursor. The human ortholog is highly similar in sequence and functional in zebrafish. The evolutionarily conserved ancestral allele of a human coding polymorphism predominates in African and East Asian populations. In contrast, the variant allele is nearly fixed in European populations, is associated with a substantial reduction in regional heterozygosity, and correlates with lighter skin pigmentation in admixed populations, suggesting a key role for the SLC24A5 gene in human pigmentation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lamason, Rebecca L -- Mohideen, Manzoor-Ali P K -- Mest, Jason R -- Wong, Andrew C -- Norton, Heather L -- Aros, Michele C -- Jurynec, Michael J -- Mao, Xianyun -- Humphreville, Vanessa R -- Humbert, Jasper E -- Sinha, Soniya -- Moore, Jessica L -- Jagadeeswaran, Pudur -- Zhao, Wei -- Ning, Gang -- Makalowska, Izabela -- McKeigue, Paul M -- O'donnell, David -- Kittles, Rick -- Parra, Esteban J -- Mangini, Nancy J -- Grunwald, David J -- Shriver, Mark D -- Canfield, Victor A -- Cheng, Keith C -- CA73935/CA/NCI NIH HHS/ -- EY11308/EY/NEI NIH HHS/ -- HD37572/HD/NICHD NIH HHS/ -- HD40179/HD/NICHD NIH HHS/ -- HG002154/HG/NHGRI NIH HHS/ -- HL077910/HL/NHLBI NIH HHS/ -- RR017441/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2005 Dec 16;310(5755):1782-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Jake Gittlen Cancer Research Foundation, Department of Pathology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16357253" target="_blank"〉PubMed〈/a〉
    Keywords: African Americans/genetics ; African Continental Ancestry Group/genetics ; Alanine/genetics ; Alleles ; Amino Acid Sequence ; Animals ; Antiporters/chemistry/*genetics/physiology ; Asian Continental Ancestry Group/genetics ; Biological Evolution ; Calcium/metabolism ; European Continental Ancestry Group/genetics ; Gene Frequency ; Genes ; Genetic Variation ; Haplotypes ; Heterozygote ; Humans ; Ion Transport ; Melanins/analysis ; Melanosomes/chemistry/ultrastructure ; Mice ; Molecular Sequence Data ; Multifactorial Inheritance ; Mutation ; Pigment Epithelium of Eye/chemistry/ultrastructure ; Polymorphism, Single Nucleotide ; Selection, Genetic ; Skin Pigmentation/*genetics ; Threonine/genetics ; Zebrafish/embryology/*genetics/metabolism ; Zebrafish Proteins/chemistry/*genetics/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Type VII collagen is required for Ras-driven human epidermal tumorigenesis (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-03-19
    Description: Type VII collagen defects cause recessive dystrophic epidermolysis bullosa (RDEB), a blistering skin disorder often accompanied by epidermal cancers. To study the role of collagen VII in these cancers, we examined Ras-driven tumorigenesis in RDEB keratinocytes. Cells devoid of collagen VII did not form tumors in mice, whereas those retaining a specific collagen VII fragment (the amino-terminal noncollagenous domain NC1) were tumorigenic. Forced NC1 expression restored tumorigenicity to collagen VII-null epidermis in a non-cell-autonomous fashion. Fibronectin-like sequences within NC1 (FNC1) promoted tumor cell invasion in a laminin 5-dependent manner and were required for tumorigenesis. Tumor-stroma interactions mediated by collagen VII thus promote neoplasia, and retention of NC1 sequences in a subset of RDEB patients may contribute to their increased susceptibility to squamous cell carcinoma.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ortiz-Urda, Susana -- Garcia, John -- Green, Cheryl L -- Chen, Lei -- Lin, Qun -- Veitch, Dallas P -- Sakai, Lynn Y -- Lee, Hyangkyu -- Marinkovich, M Peter -- Khavari, Paul A -- AR43799/AR/NIAMS NIH HHS/ -- AR44012/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2005 Mar 18;307(5716):1773-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉VA Palo Alto Healthcare System, Palo Alto, CA 94304, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15774758" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Animals ; Antibodies/immunology ; Apoptosis ; Carcinoma, Squamous Cell/etiology/*physiopathology ; Cell Adhesion Molecules/immunology/metabolism ; Cell Proliferation ; Cell Transformation, Neoplastic ; Child ; Collagen Type VII/chemistry/*genetics/immunology/*physiology ; Disease Susceptibility ; Epidermolysis Bullosa Dystrophica/complications/*genetics/metabolism/pathology ; Female ; *Genes, ras ; Humans ; I-kappa B Proteins/genetics/metabolism ; Keratinocytes/*metabolism/pathology ; Male ; Mice ; Mice, SCID ; Middle Aged ; Mutation ; Neoplasm Invasiveness ; Protein Structure, Tertiary ; Skin Neoplasms/etiology/pathology/*physiopathology
    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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    Nod2 mutation in Crohn's disease potentiates NF-kappaB activity and IL-1beta processing (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-02-05
    Description: Variants of NOD2, an intracellular sensor of bacteria-derived muramyl dipeptide (MDP), increase susceptibility to Crohn's disease (CD). These variants are thought to be defective in activation of nuclear factor kappaB (NF-kappaB) and antibacterial defenses, but CD clinical specimens display elevated NF-kappaB activity. To illuminate the pathophysiological function of NOD2, we introduced such a variant to the mouse Nod2 locus. Mutant mice exhibited elevated NF-kappaB activation in response to MDP and more efficient processing and secretion of the cytokine interleukin-1beta (IL-1beta). These effects are linked to increased susceptibility to bacterial-induced intestinal inflammation and identify NOD2 as a positive regulator of NF-kappaB activation and IL-1beta secretion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maeda, Shin -- Hsu, Li-Chung -- Liu, Hongjun -- Bankston, Laurie A -- Iimura, Mitsutoshi -- Kagnoff, Martin F -- Eckmann, Lars -- Karin, Michael -- AI43477/AI/NIAID NIH HHS/ -- AI56075/AI/NIAID NIH HHS/ -- DK07202/DK/NIDDK NIH HHS/ -- DK35108/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2005 Feb 4;307(5710):734-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0723, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15692052" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylmuramyl-Alanyl-Isoglutamine/immunology ; Animals ; Anti-Bacterial Agents/pharmacology ; Apoptosis ; Bacteria/immunology ; Cells, Cultured ; Colitis/immunology/pathology ; Colon/*immunology/microbiology ; Crohn Disease/genetics/*immunology ; Cytokines/biosynthesis/genetics ; Dextran Sulfate/pharmacology ; Interleukin-1/*metabolism ; Intestinal Mucosa/immunology ; Intracellular Signaling Peptides and Proteins/*genetics/*physiology ; Lipopolysaccharides/immunology ; Macrophage Activation ; Macrophages/*immunology/metabolism ; Mice ; Mutation ; NF-kappa B/*metabolism ; Nod2 Signaling Adaptor Protein ; Peptidoglycan/immunology ; Signal Transduction
    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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    Variable control of Ets-1 DNA binding by multiple phosphates in an unstructured region (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-07-05
    Description: Cell signaling that culminates in posttranslational modifications directs protein activity. Here we report how multiple Ca2+-dependent phosphorylation sites within the transcription activator Ets-1 act additively to produce graded DNA binding affinity. Nuclear magnetic resonance spectroscopic analyses show that phosphorylation shifts Ets-1 from a dynamic conformation poised to bind DNA to a well-folded inhibited state. These phosphates lie in an unstructured flexible region that functions as the allosteric effector of autoinhibition. Variable phosphorylation thus serves as a "rheostat" for cell signaling to fine-tune transcription at the level of DNA binding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pufall, Miles A -- Lee, Gregory M -- Nelson, Mary L -- Kang, Hyun-Seo -- Velyvis, Algirdas -- Kay, Lewis E -- McIntosh, Lawrence P -- Graves, Barbara J -- GM08537/GM/NIGMS NIH HHS/ -- P01-CA24014/CA/NCI NIH HHS/ -- R01 GM38663/GM/NIGMS NIH HHS/ -- T32-CA93247/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2005 Jul 1;309(5731):142-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Huntsman Cancer Institute, Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112-5550, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15994560" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Calcium-Calmodulin-Dependent Protein Kinase Type 2 ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; DNA/*metabolism ; Hydrophobic and Hydrophilic Interactions ; Mice ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Nuclear Magnetic Resonance, Biomolecular ; Phosphorylation ; Protein Binding ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Proto-Oncogene Protein c-ets-1 ; Proto-Oncogene Proteins/*chemistry/genetics/*metabolism ; Proto-Oncogene Proteins c-ets ; Signal Transduction ; Transcription Factors/*chemistry/genetics/*metabolism
    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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    Cloning of genomic and complementary DNA from Shaker, a putative potassium channel gene from Drosophila (1987)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1987-08-14
    Description: On the basis of electrophysiological analysis of Shaker mutants, the Shaker locus of Drosophila melanogaster has been proposed to encode a structural component of a voltage-dependent potassium channel, the A channel. Unlike sodium channels, acetylcholine receptors, and calcium channels, K+ channels have not been purified biochemically. To facilitate biochemical studies of a K+ channel, genomic DNA from the Shaker locus has been cloned. Rearrangements in five Shaker mutants have been mapped to a 60-kilobase segment of the genome. Four complementary DNA clones have been analyzed. These clones indicate that the Shaker gene contains multiple exons distributed over at least 65 kilobases of genomic DNA in the region where the mutations mapped. Furthermore, the gene may produce several classes of alternatively spliced transcripts. Two of the complementary DNA clones have been sequenced and their sequences support the hypothesis that Shaker encodes a component of a K+ channel.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Papazian, D M -- Schwarz, T L -- Tempel, B L -- Jan, Y N -- Jan, L Y -- NS15963/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1987 Aug 14;237(4816):749-53.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2441470" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cloning, Molecular ; DNA/*genetics/isolation & purification ; Drosophila melanogaster/*genetics ; Exons ; *Ion Channels ; Membrane Proteins/*genetics ; Mutation ; Nucleic Acid Hybridization ; Potassium/*metabolism ; RNA Splicing ; Transcription, Genetic ; Translocation, 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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  • 6
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    Sequence of a probable potassium channel component encoded at Shaker locus of Drosophila (1987)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1987-08-14
    Description: Potassium currents are crucial for the repolarization of electrically excitable membranes, a role that makes potassium channels a target for physiological modifications that alter synaptic efficacy. The Shaker locus of Drosophila is thought to encode a K+ channel. The sequence of two complementary DNA clones from the Shaker locus is reported here. The sequence predicts an integral membrane protein of 70,200 daltons containing seven potential membrane-spanning sequences. In addition, the predicted protein is homologous to the vertebrate sodium channel in a region previously proposed to be involved in the voltage-dependent activation of the Na+ channel. These results support the hypothesis that Shaker encodes a structural component of a voltage-dependent K+ channel and suggest a conserved mechanism for voltage activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tempel, B L -- Papazian, D M -- Schwarz, T L -- Jan, Y N -- Jan, L Y -- NS15963/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1987 Aug 14;237(4816):770-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2441471" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Codon ; DNA/*genetics ; Drosophila melanogaster/*genetics ; Electrophorus/genetics ; Genes ; *Ion Channels ; Membrane Proteins/*genetics ; Mutation ; Potassium/*metabolism ; Sodium/metabolism
    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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    T helper cell fate specified by kinase-mediated interaction of T-bet with GATA-3 (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-01-22
    Description: Cell lineage specification depends on both gene activation and gene silencing, and in the differentiation of T helper progenitors to Th1 or Th2 effector cells, this requires the action of two opposing transcription factors, T-bet and GATA-3. T-bet is essential for the development of Th1 cells, and GATA-3 performs an equivalent role in Th2 development. We report that T-bet represses Th2 lineage commitment through tyrosine kinase-mediated interaction between the two transcription factors that interferes with the binding of GATA-3 to its target DNA. These results provide a novel function for tyrosine phosphorylation of a transcription factor in specifying alternate fates of a common progenitor cell.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hwang, Eun Sook -- Szabo, Susanne J -- Schwartzberg, Pamela L -- Glimcher, Laurie H -- AI48126/AI/NIAID NIH HHS/ -- AI56296/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2005 Jan 21;307(5708):430-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15662016" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Lineage ; Cytokines/pharmacology/physiology ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; GATA3 Transcription Factor ; Interleukin-5/genetics ; Mice ; Mice, Inbred BALB C ; Mutation ; Phosphorylation ; Phosphotyrosine/metabolism ; Promoter Regions, Genetic ; Protein Structure, Tertiary ; Protein-Tyrosine Kinases/metabolism ; T-Box Domain Proteins ; T-Lymphocytes, Helper-Inducer/cytology/*physiology ; Th1 Cells/cytology/physiology ; Th2 Cells/cytology/*physiology ; Trans-Activators/chemistry/genetics/*metabolism ; Transcription Factors/chemistry/genetics/*metabolism
    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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    A homolog of Drosophila grainy head is essential for epidermal integrity in mice (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-04-16
    Description: The Drosophila cuticle is essential for maintaining the surface barrier defenses of the fly. Integral to cuticle resilience is the transcription factor grainy head, which regulates production of the enzyme required for covalent cross-linking of the cuticular structural components. We report that formation and maintenance of the epidermal barrier in mice are dependent on a mammalian homolog of grainy head, Grainy head-like 3. Mice lacking this factor display defective skin barrier function and deficient wound repair, accompanied by reduced expression of transglutaminase 1, the key enzyme involved in cross-linking the structural components of the superficial epidermis. These findings suggest that the functional mechanisms involving protein cross-linking that maintain the epidermal barrier and induce tissue repair are conserved across 700 million years of evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ting, Stephen B -- Caddy, Jacinta -- Hislop, Nikki -- Wilanowski, Tomasz -- Auden, Alana -- Zhao, Lin-Lin -- Ellis, Sarah -- Kaur, Pritinder -- Uchida, Yoshikazu -- Holleran, Walter M -- Elias, Peter M -- Cunningham, John M -- Jane, Stephen M -- P01 HL53749-03/HL/NHLBI NIH HHS/ -- P01-AR39448/AR/NIAMS NIH HHS/ -- P30 CA 21765/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2005 Apr 15;308(5720):411-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rotary Bone Marrow Research Laboratories, c/o Royal Melbourne Hospital Post Office, Grattan Street, Parkville, Victoria, Australia 3050.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15831758" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Biological Evolution ; DNA-Binding Proteins/*genetics/metabolism/*physiology ; Embryo, Mammalian/physiology ; Embryonic Development ; Epidermis/*embryology/*physiology ; Epithelium/physiology ; Gene Expression ; Kruppel-Like Transcription Factors ; Mice ; Mutation ; Permeability ; Transcription Factors/*genetics/metabolism/*physiology ; Transglutaminases/genetics/metabolism ; Wound Healing/*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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  • 9
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    Apolipoprotein L-I promotes trypanosome lysis by forming pores in lysosomal membranes (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-07-16
    Description: Apolipoprotein L-I is the trypanolytic factor of human serum. Here we show that this protein contains a membrane pore-forming domain functionally similar to that of bacterial colicins, flanked by a membrane-addressing domain. In lipid bilayer membranes, apolipoprotein L-I formed anion channels. In Trypanosoma brucei, apolipoprotein L-I was targeted to the lysosomal membrane and triggered depolarization of this membrane, continuous influx of chloride, and subsequent osmotic swelling of the lysosome until the trypanosome lysed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Perez-Morga, David -- Vanhollebeke, Benoit -- Paturiaux-Hanocq, Francoise -- Nolan, Derek P -- Lins, Laurence -- Homble, Fabrice -- Vanhamme, Luc -- Tebabi, Patricia -- Pays, Annette -- Poelvoorde, Philippe -- Jacquet, Alain -- Brasseur, Robert -- Pays, Etienne -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2005 Jul 15;309(5733):469-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Parasitology, IBMM, Universite Libre de Bruxelles, 12, rue des Profs Jeener et Brachet, B6041 Gosselies, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16020735" target="_blank"〉PubMed〈/a〉
    Keywords: 4,4'-Diisothiocyanostilbene-2,2'-Disulfonic Acid/pharmacology ; Amino Acid Sequence ; Animals ; Anions/metabolism ; Apolipoproteins/*chemistry/genetics/*metabolism/pharmacology ; Cells, Immobilized ; Chlorides/metabolism ; Colicins/chemistry/pharmacology ; Escherichia coli/drug effects/growth & development ; Humans ; Intracellular Membranes/drug effects/*metabolism/ultrastructure ; Ion Channels/metabolism ; Lipid Bilayers/chemistry ; Lipoproteins, HDL/*chemistry/genetics/*metabolism/pharmacology ; Lysosomes/drug effects/*metabolism/ultrastructure ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Permeability ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Recombinant Proteins/metabolism ; Trypanosoma brucei brucei/drug effects/*metabolism/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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  • 10
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    Requirement of voltage-gated calcium channel beta4 subunit for T lymphocyte functions (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-01-08
    Description: Calcium is known to play vital roles in diverse physiological processes, and it is known that voltage-gated calcium channels (Cav) mediate calcium influx in excitable cells. However, no consensus exists on the molecular identity of the calcium channels present in nonexcitable cells such as T lymphocytes. Here, we demonstrate that T lymphocytes express both regulatory beta4 and poreforming Cav1 alpha1 subunits of Cav channels. Cav beta4-mutant T lymphocytes fail to acquire normal functions and display impairment in the calcium response, activation of the transcription factor NFAT, and cytokine production. Although Cav1 channels of lymphocytes retain their voltage dependency, T cell receptor stimulation dramatically increases channel opening, providing a new mechanism for calcium entry in lymphocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Badou, Abdallah -- Basavappa, Srisaila -- Desai, Rooma -- Peng, You-Qing -- Matza, Didi -- Mehal, Wajahat Z -- Kaczmarek, Leonard K -- Boulpaep, Emile L -- Flavell, Richard A -- New York, N.Y. -- Science. 2005 Jan 7;307(5706):117-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15637280" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CD4-Positive T-Lymphocytes/*immunology/*metabolism ; Calcium/*metabolism ; Calcium Channels, L-Type/*metabolism ; *Calcium Signaling ; Cytokines/biosynthesis ; DNA-Binding Proteins/metabolism ; Ion Channel Gating ; Lymphocyte Activation ; Membrane Potentials ; Mice ; Mice, Inbred C3H ; Mice, Inbred C57BL ; Mutation ; NFATC Transcription Factors ; Nuclear Proteins/metabolism ; Patch-Clamp Techniques ; Phosphorylation ; Protein Subunits/metabolism ; Receptors, Antigen, T-Cell/metabolism ; T-Lymphocytes/immunology/metabolism ; Transcription Factors/metabolism
    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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