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  • 1
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    Colocalization of X-linked agammaglobulinemia and X-linked immunodeficiency genes (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-07-16
    Description: Mice that bear the X-linked immunodeficiency (xid) mutation have a B lymphocyte-specific defect resulting in an inability to make antibody responses to polysaccharide antigens. A backcross of 1114 progeny revealed the colocalization of xid with Bruton's agammaglobulinemia tyrosine kinase (btk) gene, which is implicated in the human immune deficiency, X-linked agammaglobulinemia. Mice that carry xid have a missense mutation that alters a highly conserved arginine near the amino-terminus of the btk protein, Btk. Because this region of Btk lies outside any obvious kinase domain, the xid mutation may define another aspect of tyrosine kinase function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thomas, J D -- Sideras, P -- Smith, C I -- Vorechovsky, I -- Chapman, V -- Paul, W E -- GM33160/GM/NIGMS NIH HHS/ -- HG00277/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 1993 Jul 16;261(5119):355-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Immunology, National Institute of Allergy and Infectious 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/8332900" target="_blank"〉PubMed〈/a〉
    Keywords: Agammaglobulinemia/enzymology/*genetics/immunology ; Amino Acid Sequence ; Animals ; B-Lymphocytes/enzymology/immunology ; Base Sequence ; Chromosome Mapping ; Crosses, Genetic ; Female ; *Genes ; Genetic Linkage ; Immunologic Deficiency Syndromes/enzymology/*genetics/immunology ; Male ; Mice ; Mice, Inbred CBA ; Mice, Mutant Strains ; Molecular Sequence Data ; Muridae ; Mutation ; Protein-Tyrosine Kinases/chemistry/*genetics/metabolism ; *X Chromosome
    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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    Btk29A promotes Wnt4 signaling in the niche to terminate germ cell proliferation in Drosophila (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-01-18
    Description: Btk29A is the Drosophila ortholog of the mammalian Bruton's tyrosine kinase (Btk), mutations of which in humans cause a heritable immunodeficiency disease. Btk29A mutations stabilized the proliferating cystoblast fate, leading to an ovarian tumor. This phenotype was rescued by overexpression of wild-type Btk29A and phenocopied by the interference of Wnt4-beta-catenin signaling or its putative downstream nuclear protein Piwi in somatic escort cells. Btk29A and mammalian Btk directly phosphorylated tyrosine residues of beta-catenin, leading to the up-regulation of its transcriptional activity. Thus, we identify a transcriptional switch involving the kinase Btk29A/Btk and its phosphorylation target, beta-catenin, which functions downstream of Wnt4 in escort cells to terminate Drosophila germ cell proliferation through up-regulation of piwi expression. This signaling mechanism likely represents a versatile developmental switch.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hamada-Kawaguchi, Noriko -- Nore, Beston F -- Kuwada, Yusuke -- Smith, C I Edvard -- Yamamoto, Daisuke -- New York, N.Y. -- Science. 2014 Jan 17;343(6168):294-7. doi: 10.1126/science.1244512.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Biology and Neurosciences, Tohoku University Graduate School of Life Sciences, Sendai 980-8577, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24436419" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Argonaute Proteins/*biosynthesis ; *Cell Proliferation ; DNA Breaks, Double-Stranded ; Drosophila Proteins/*biosynthesis/genetics/*metabolism ; Drosophila melanogaster/genetics/metabolism/*physiology ; Gene Knockdown Techniques ; Genomic Instability ; Germ Cells/cytology/metabolism/*physiology ; Glycoproteins/genetics/*metabolism ; Phosphorylation ; Protein-Tyrosine Kinases/genetics/*metabolism ; RNA, Small Interfering/genetics/metabolism ; Signal Transduction ; Transcription, Genetic ; Tyrosine/genetics/metabolism ; Up-Regulation ; Wnt Proteins/genetics/*metabolism ; beta Catenin/genetics/*metabolism
    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)
    Location Call Number Expected Availability
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