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:
影响因子:
--
通讯作者:
Fuller MT
中科院分区:
文献类型:
--
作者:
Kim J;Lu C;Srinivasan S;Awe S;Brehm A;Fuller MT
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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