首页> 外文期刊>Nature >DAXX envelops a histone H3.3-H4 dimer for H3.3 - specific recognition
【24h】

DAXX envelops a histone H3.3-H4 dimer for H3.3 - specific recognition

机译:DAXX封装了用于H3.3的组蛋白H3.3-H4二聚体-特异性识别

获取原文
获取原文并翻译 | 示例
           

摘要

Histone chaperones represent a structurally and functionally diverse family of histone-binding proteins that prevent promiscuous interactions of histones before their assembly into chromatin. DAXX is a metazoan histone chaperone specific to the evolutionarily conserved histone variant H3.3. Here we report the crystal structures of the DAXX histone-binding domain with a histone H3.3-H4 dimer, including mutants within DAXX and H3.3, together with in vitro and in vivo functional studies that elucidate the principles underlying H3.3 recognition specificity. Occupying 40% of the histone surface-accessible area, DAXX wraps around the H3.3-H4 dimer, with complex formation accompanied by structural transitions in the H3.3-H4 histone fold. DAXX uses an extended a-helical conformation to compete with major inter-histone, DNA and ASF1 interaction sites. Our structural studies identify recognition elements that read out H3.3-specific residues, and functional studies address the contributions of Gly 90 in H3.3 and Glu 225 in DAXX to chaperone-mediated H3.3 variant recognition specificity.
机译:组蛋白伴侣代表结构和功能多样的组蛋白结合蛋白家族,可防止组蛋白在组装成染色质之前的混杂相互作用。 DAXX是后生的组蛋白分子伴侣,特异于进化保守的组蛋白变体H3.3。在这里,我们报告了具有组蛋白H3.3-H4二聚体的DAXX组蛋白结合域的晶体结构,包括DAXX和H3.3中的突变体,以及阐明了H3.3识别原理的体外和体内功能研究特异性。 DAXX占据了组蛋白表面可及区域的40%,包裹在H3.3-H4二聚体周围,形成复杂的结构,并伴随着H3.3-H4组蛋白折叠的结构转变。 DAXX使用扩展的a螺旋构象与主要的组蛋白间,DNA和ASF1相互作用位点竞争。我们的结构研究确定了识别元件,该元件可读取H3.3特异性残基,功能研究则研究了H3.3中的Gly 90和DAXX中的Glu 225对伴侣介导的H3.3变体识别特异性的贡献。

著录项

  • 来源
    《Nature》 |2012年第7425期|p.560-565|共6页
  • 作者单位

    Laboratory of Chromatin Biology and Epigenetics, The Rockefeller University, New York, New York 10065, USA,MRC Laboratory of Molecular Biology, Cambridge CB2 OQH, UK;

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA;

    Laboratory of Chromatin Biology and Epigenetics, The Rockefeller University, New York, New York 10065, USA;

    MRC Laboratory of Molecular Biology, Cambridge CB2 OQH, UK;

    Laboratory of Chromatin Biology and Epigenetics, The Rockefeller University, New York, New York 10065, USA;

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号