Phf7 controls male sex determination in the Drosophila germline.

Phf7 controls male sex determination in the Drosophila germline.
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DOI:
10.1016/j.devcel.2012.04.013
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发表时间:
2012-05-15
期刊:
影响因子:
11.8
通讯作者:
Van Doren, Mark
Van Doren, Mark
中科院分区:
生物学1区
文献类型:
--
作者:
Yang, Shu Yuan;Baxter, Ellen M.;Van Doren, Mark

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生殖系性别身份的建立对于雄性和雌性生殖系干细胞的产生以及精子与卵子的关系至关重要。在这里,我们确定PHD指蛋白7(PHF 7)作为一个重要因素的雄性生殖细胞的性别身份在果蝇。PHF 7在早期生殖细胞、生殖系干细胞和精原细胞中表现出雄性特异性表达。它是男性生殖系干细胞维持和配子发生所必需的,而在女性生殖细胞中的异位表达会消除生殖系。引人注目的是,当XX生殖细胞存在于雄性索马中时,PHF 7的表达促进了它们的精子发生。PHF 7同源物也在哺乳动物睾丸中特异性表达,并且人PHF 7拯救果蝇Phf 7突变体。PHF 7与染色质结合,人和蝇蛋白都结合组蛋白H3 N-末端尾部,优先选择二甲基赖氨酸4(H3 K4 me 2)。我们认为PHF 7是一个保守的表观遗传“阅读器”,激活男性生殖系性程序。
Establishment of germline sexual identity is critical for production of male and female germline stem cells, and sperm vs. eggs. Here we identify PHD Finger Protein 7 (PHF7) as an important factor for male germline sexual identity in Drosophila. PHF7 exhibits male-specific expression in early germ cells, germline stem cells and spermatogonia. It is required for germline stem cell maintenance and gametogenesis in males, whereas ectopic expression in female germ cells ablates the germline. Strikingly, expression of PHF7 promotes spermatogenesis in XX germ cells when they are present in a male soma. PHF7 homologs are also specifically expressed in the mammalian testis, and human PHF7 rescues Drosophila Phf7 mutants. PHF7 associates with chromatin and both the human and fly proteins bind histone H3 N-terminal tails with a preference for dimethyl lysine 4 (H3K4me2). We propose that PHF7 acts as a conserved epigenetic “reader” that activates the male germline sexual program.
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