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61.
Nephrocystin-5, a ciliary IQ domain protein, is mutated in Senior-Loken syndrome and interacts with RPGR and calmodulin 总被引:14,自引:0,他引:14
Otto EA Loeys B Khanna H Hellemans J Sudbrak R Fan S Muerb U O'Toole JF Helou J Attanasio M Utsch B Sayer JA Lillo C Jimeno D Coucke P De Paepe A Reinhardt R Klages S Tsuda M Kawakami I Kusakabe T Omran H Imm A Tippens M Raymond PA Hill J Beales P He S Kispert A Margolis B Williams DS Swaroop A Hildebrandt F 《Nature genetics》2005,37(3):282-288
Nephronophthisis (NPHP) is the most frequent genetic cause of chronic renal failure in children. Identification of four genes mutated in NPHP subtypes 1-4 (refs. 4-9) has linked the pathogenesis of NPHP to ciliary functions. Ten percent of affected individuals have retinitis pigmentosa, constituting the renal-retinal Senior-Loken syndrome (SLSN). Here we identify, by positional cloning, mutations in an evolutionarily conserved gene, IQCB1 (also called NPHP5), as the most frequent cause of SLSN. IQCB1 encodes an IQ-domain protein, nephrocystin-5. All individuals with IQCB1 mutations have retinitis pigmentosa. Hence, we examined the interaction of nephrocystin-5 with RPGR (retinitis pigmentosa GTPase regulator), which is expressed in photoreceptor cilia and associated with 10-20% of retinitis pigmentosa. We show that nephrocystin-5, RPGR and calmodulin can be coimmunoprecipitated from retinal extracts, and that these proteins localize to connecting cilia of photoreceptors and to primary cilia of renal epithelial cells. Our studies emphasize the central role of ciliary dysfunction in the pathogenesis of SLSN. 相似文献
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Vinuesa CG Cook MC Angelucci C Athanasopoulos V Rui L Hill KM Yu D Domaschenz H Whittle B Lambe T Roberts IS Copley RR Bell JI Cornall RJ Goodnow CC 《Nature》2005,435(7041):452-458
Despite the sequencing of the human and mouse genomes, few genetic mechanisms for protecting against autoimmune disease are currently known. Here we systematically screen the mouse genome for autoimmune regulators to isolate a mouse strain, sanroque, with severe autoimmune disease resulting from a single recessive defect in a previously unknown mechanism for repressing antibody responses to self. The sanroque mutation acts within mature T cells to cause formation of excessive numbers of follicular helper T cells and germinal centres. The mutation disrupts a repressor of ICOS, an essential co-stimulatory receptor for follicular T cells, and results in excessive production of the cytokine interleukin-21. sanroque mice fail to repress diabetes-causing T cells, and develop high titres of autoantibodies and a pattern of pathology consistent with lupus. The causative mutation is in a gene of previously unknown function, roquin (Rc3h1), which encodes a highly conserved member of the RING-type ubiquitin ligase protein family. The Roquin protein is distinguished by the presence of a CCCH zinc-finger found in RNA-binding proteins, and localization to cytosolic RNA granules implicated in regulating messenger RNA translation and stability. 相似文献
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Y-chromosome variation and Irish origins 总被引:12,自引:0,他引:12
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Auriol C. Hill H. Georgis Joyce Breaden 《Cellular and molecular life sciences : CMLS》1977,33(7):954-955
Summary Pigment present in the spleen of C57BL and related mice, after the stress of experimental procedures, was shown to be melanin.Acknowledgments. We would like to thank Dr. J. Hewson, British Industrial Biological Research Association, Carshalton, Surrey, for the help and advice. 相似文献
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M. Hill 《Cellular and molecular life sciences : CMLS》1966,22(11):726-727
Zusammenfassung L-Zellen-Population wurde durch3H-Thymidin-Puls markiert, gewaschen und in Petri-Schalen kultiviert, nach 24- und 48-stündiger Inkubation fixiert und autoradiographisch verarbeitet. In den nach der Inkubation mit3H-Thymidin unmarkiert gebliebenen Zellen erschien um die Nukleolen eine markierte DNS. Eine Vorstellung über den DNS-Einbau wird entwickelt. 相似文献
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