The Polycomb‐group gene, extra sex combs, encodes a nuclear member of the WD‐40 repeat family.

The Polycomb‐group gene, extra sex combs, encodes a nuclear member of the WD‐40 repeat family.
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Polycomb 组基因(额外性梳)编码 WD-40 重复家族的核心成员。

DOI:
10.1002/j.1460-2075.1995.tb00104.x
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发表时间:
1995
期刊:
The EMBO Journal
影响因子:
--
通讯作者:
Markus Noll
Markus Noll
中科院分区:
--
文献类型:
--
作者:
T. Gutjahr;Erich Frei;C. Spicer;Stefan Baumgartner;R. A. White;Markus Noll

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我们已经将额外的性梳(ESC)基因限制在-lt;4kb,包括一个转录本,并能够挽救母体和受精卵的ESC表型。在ESC转录本中已经发现了几个突变。与早期的遗传学研究一致,胚胎干细胞在母体中表达,其产物在早期胚胎阶段最为丰富。它编码WD-40重复家族的一种蛋白质,主要定位于细胞核。在生殖带延伸过程中,它以神经母细胞的典型模式表达。我们提出了一个模型,在该模型中,ESC被GAP蛋白招募,既充当与TAFII80共激活子竞争的转录抑制因子,又介导多梳族蛋白向永久抑制的转变。
We have delimited the extra sex combs (esc) gene to < 4 kb that include a single transcript and are able to rescue both the maternal and zygotic esc phenotypes. Several mutations have been identified within the esc transcript. In agreement with earlier genetic studies, esc is expressed maternally and its product is most abundant during the early embryonic stages. It encodes a protein of the WD‐40 repeat family, which localizes predominantly to the nucleus. During germ band extension, it is expressed in a stereotypic pattern of neuroblasts. We propose a model in which Esc is recruited by gap proteins both to act as a corepressor that competes with the TAFII80 coactivator to block transcription and also to mediate the transition to permanent repression by Polycomb‐group proteins.
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影响因子: 5.6
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DOI: --
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