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Mammalian ubiquitin-conjugating enzyme Ubc9 interacts with Rad51 recombination protein and localizes in synaptonemal complexes.

机译:哺乳动物泛素结合酶Ubc9与Rad51重组蛋白相互作用,并位于突触复合物中。

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摘要

Hsubc9, a human gene encoding a ubiquitin-conjugating enzyme, has been cloned. The 18-kDa HsUbc9 protein is homologous to the ubiquitin-conjugating enzymes Hus5 of Schizosaccharomyces pombe and Ubc9 of Saccharomyces cerevisiae. The Hsubc9 gene complements a ubc9 mutation of S. cerevisiae. It has been mapped to chromosome 16p13.3 and is expressed in many human tissues, with the highest levels in testis and thymus. According to the Ga14 two-hybrid system analysis, HsUbc9 protein interacts with human recombination protein Rad51. A mouse homolog, Mmubc9, encodes an amino acid sequence that is identical to the human protein. In mouse spermatocytes, MmUbc9 protein, like Rad51 protein, localizes in synaptonemal complexes, which suggests that Ubc9 protein plays a regulatory role in meiosis.
机译:已经克隆了编码泛素结合酶的人类基因Hsubc9。 18 kDa HsUbc9蛋白与粟酒裂殖酵母的泛素结合酶Hus5和酿酒酵母Ubc9同源。 Hsubc9基因与酿酒酵母的ubc9突变互补。它已被映射到16p13.3号染色体,并在许多人体组织中表达,在睾丸和胸腺中含量最高。根据Ga14双杂交系统分析,HsUbc9蛋白与人重组蛋白Rad51相互作用。小鼠同源物Mmubc9编码与人蛋白质相同的氨基酸序列。在小鼠精母细胞中,MmUbc9蛋白与Rad51蛋白一样位于突触复合物中,这表明Ubc9蛋白在减数分裂中起调节作用。

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