Blocking promiscuous activation at cryptic promoters directs cell type-specific gene expression.

Blocking promiscuous activation at cryptic promoters directs cell type-specific gene expression.
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阻止隐性启动子的混杂激活指导细胞类型特异性基因表达。

DOI:
10.1126/science.aal3096
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发表时间:
2017-05-19
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Fuller MT
Fuller MT
中科院分区:
其他
文献类型:
--
作者:
Kim J;Lu C;Srinivasan S;Awe S;Brehm A;Fuller MT

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为了在发育过程中选择性地表达细胞类型特异性转录物,保持其他谱系所需的基因处于沉默状态至关重要。在这里,我们表明,在果蝇雄性生殖系干细胞谱系,精母细胞特异性锌指蛋白,金刚(Kmg),与染色质重塑,dMi-2,防止转录的基因通常只在体细胞谱系中表达。通过阻断通常隐蔽的启动子的转录,Kmg限制了睾丸减数分裂阻滞复合物(tMAC)的一个组分Aly对雄性生殖细胞分化的转录物的激活。我们的研究结果表明,随着基因组的新区域在终末分化过程中对转录开放,阻断混杂激活剂对隐蔽启动子的作用是指定精确基因激活的关键机制。
To selectively express cell-type specific transcripts during development, it is critical to maintain genes required for other lineages in a silent state. Here we show in the Drosophila male germ line stem cell lineage that a spermatocyte specific zinc finger protein, Kumgang (Kmg), working with the chromatin remodeler, dMi-2, prevents transcription of genes normally expressed only in somatic lineages. By blocking transcription from normally cryptic promoters, Kmg restricts activation by Aly, a component of the testis-meiotic arrest complex (tMAC), to transcripts for male germ cell differentiation. Our results suggest that as new regions of the genome become open for transcription during terminal differentiation, blocking the action of a promiscuous activator on cryptic promoters is a critical mechanism for specifying precise gene activation.
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发表时间: 2014-03
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影响因子: 30.5
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