The H3K9 methyltransferase SETDB1 maintains female identity in Drosophila germ cells.

The H3K9 methyltransferase SETDB1 maintains female identity in Drosophila germ cells.
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DOI:
10.1038/s41467-018-06697-x
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发表时间:
2018-10-08
影响因子:
16.6
通讯作者:
Salz HK
Salz HK
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Smolko AE;Shapiro-Kulnane L;Salz HK

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生殖细胞性别特征的保存对于配子发生至关重要。在这里,我们证明 H3K9me3 介导的基因沉默对于果蝇生殖细胞中雌性命运的维持是不可或缺的。 H3K9me3 通路成员(H3K9 甲基转移酶 SETDB1、WDE 和 HP1a)的生殖细胞特异性丢失会导致基因异位表达,其中许多基因通常在睾丸中表达。 SETDB1 控制 H3K9me3 在这些基因的子集上的积累,而不扩散到邻近的基因座。在 phf7(雄性生殖细胞性命运的调节因子)处,H3K9me3 峰值落在沉默的睾丸特异性转录起始位点上。此外,H3K9me3 招募到 phf7 和睾丸特异性转录的抑制取决于女性性别决定基因 Sxl。因此,女性身份通过 H3K9me3 表观遗传途径得到保障,其中 Sxl 是上游女性特异性调节因子,SETDB1 是所需的染色质书写器,phf7 是关键的 SETDB1 靶基因之一。表观遗传调控对于维持生殖细胞身份至关重要。作者在此表明,H3K9me3 介导的基因沉默对于果蝇雌性生殖细胞中睾丸特异性转录的抑制至关重要,表明 H3K9me3 维持雌性生殖细胞的性身份。
The preservation of germ cell sexual identity is essential for gametogenesis. Here we show that H3K9me3-mediated gene silencing is integral to female fate maintenance in Drosophila germ cells. Germ cell specific loss of the H3K9me3 pathway members, the H3K9 methyltransferase SETDB1, WDE, and HP1a, leads to ectopic expression of genes, many of which are normally expressed in testis. SETDB1 controls the accumulation of H3K9me3 over a subset of these genes without spreading into neighboring loci. At phf7, a regulator of male germ cell sexual fate, the H3K9me3 peak falls over the silenced testis-specific transcription start site. Furthermore, H3K9me3 recruitment to phf7 and repression of testis-specific transcription is dependent on the female sex determination gene Sxl. Thus, female identity is secured by an H3K9me3 epigenetic pathway in which Sxl is the upstream female-specific regulator, SETDB1 is the required chromatin writer, and phf7 is one of the critical SETDB1 target genes. Epigenetic regulation is critical for the maintenance of germ cell identity. Here the authors show that H3K9me3-mediated gene silencing is critical for repression of testis-specific transcription in Drosophila female germ cells, indicating H3K9me3 maintains female germ cell sexual identity.
果蝇组蛋白甲基转移酶无蛋/DSETDB1对卵子发生和生殖干细胞维持的表观遗传调节。
DOI: 10.1016/j.ydbio.2014.01.014
发表时间: 2014-04-15
影响因子: 2.7
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发表时间: 2016-01
期刊: Trends in genetics : TIG
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发表时间: 2007-01-01
期刊: DEVELOPMENT
影响因子: 4.6
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