NAT STRUCT MOL BIO:卵母细胞中组蛋白甲基化新机制

2018-01-02 海北 MedSci原创

组蛋白3在K4位点的三甲基化(沉积H3K4me3标记)通常与启动子的活化相关,但矛盾的是,其也会发生在未转录的结构域。现在,探究靶向H3K4甲基转移酶的机制的研究正在进行。

组蛋白3K4位点的三甲基化(沉积H3K4me3标记)通常与启动子的活化相关,但矛盾的是,其也会发生在未转录的结构域。现在,探究靶向H3K4甲基转移酶的机制的研究正在进行。卵母细胞是一个非常具有吸引力的来调查这些机制的系统,因为广泛的H3K4me3聚积是发生在非分裂的细胞中的。

近日,来自英国巴布拉汉研究所(Babraham Institute)的研究人员开发了一种低输入染色质免疫沉淀的方法,在整个卵子发生期间测试H3K4me3H3K27ac,和H3K27me3的标记。在非生长期的卵母细胞中,H3K4me3修饰局限于活性启动子区域,但随着卵子发生的进展,H3K4me3以不依赖于转录的方式积累,并靶向在基因间的区域,推定的增强子区域,以及H3K27me3标记的沉默启动子区域。

H3K4甲基转移酶基因Mll2的消除导致转录非依赖性H3K4三甲基化的丧失,但对转录偶联的H3K4三甲基化或基因表达的作用有限。Dnmt3aDnmt3b的缺失表明DNA甲基化能够防止H3K4me3在本区域的发生。

因此,研究人员的研究结果揭示了两种独立的机制,将H3K4me3靶向基因组元件,其中,MLL2以不依赖转录的形式被招募到非甲基化CpG富集区域。


原始出处:

Courtney W. Hanna et al. MLL2 conveys transcription-independent H3K4 trimethylation in oocytesNature Structural & Molecular Biology, 2018; DOI: 10.1038/s41594-017-0013-5


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    2018-03-25 sunylz
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    2018-08-23 liye789132251
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    2018-08-03 日月
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    2018-01-04 xqptu
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  6. [GetPortalCommentsPageByObjectIdResponse(id=1917862, encodeId=1c3a191e862b6, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Sun Mar 25 13:52:00 CST 2018, time=2018-03-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1882738, encodeId=da7a1882e381f, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Thu Aug 23 09:52:00 CST 2018, time=2018-08-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1795136, encodeId=471b1e95136ec, content=<a href='/topic/show?id=1c9f16846fe' target=_blank style='color:#2F92EE;'>#Struc#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16846, encryptionId=1c9f16846fe, topicName=Struc)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4a4d285, createdName=日月, createdTime=Fri Aug 03 16:52:00 CST 2018, time=2018-08-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1384672, encodeId=fc1f13846e2e9, content=<a href='/topic/show?id=5c74e7739f0' target=_blank style='color:#2F92EE;'>#组蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77739, encryptionId=5c74e7739f0, topicName=组蛋白)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ea13490, createdName=xqptu, createdTime=Thu Jan 04 03:52:00 CST 2018, time=2018-01-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1625553, encodeId=e2df1625553be, content=<a href='/topic/show?id=95513689242' target=_blank style='color:#2F92EE;'>#卵母细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=36892, encryptionId=95513689242, topicName=卵母细胞)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a3b120824706, createdName=qingting, createdTime=Thu Jan 04 03:52:00 CST 2018, time=2018-01-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=275029, encodeId=98d62e5029bb, content=henhao, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NcXNhUvfhzd2VdicMnaLeK2Im5gKx4Ucxd8Bwu6S7RG0uILBFQx5HTW2bU4VricDYlQqN20ibASSMYAeGrZrrTpy2Q/0, createdBy=353a2047758, createdName=137****9095, createdTime=Wed Jan 03 11:44:29 CST 2018, time=2018-01-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=274788, encodeId=320d2e4788c1, content=学习了.涨知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220115/46bcf39c32de4aa6b45c5f9d66c8ee77/6cb4a20c55bb4b7691122f47747bfca2.jpg, createdBy=9dad1662329, createdName=1ddf0692m34(暂无匿称), createdTime=Tue Jan 02 16:28:50 CST 2018, time=2018-01-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=274755, encodeId=a6ef2e475571, content=henhao, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NcXNhUvfhzd2VdicMnaLeK2Im5gKx4Ucxd8Bwu6S7RG0uILBFQx5HTW2bU4VricDYlQqN20ibASSMYAeGrZrrTpy2Q/0, createdBy=7dcf1938111, createdName=1e0e5a1fm42(暂无匿称), createdTime=Tue Jan 02 15:34:17 CST 2018, time=2018-01-02, status=1, ipAttribution=)]
    2018-01-03 137****9095

    henhao

    0

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    2018-01-02 1ddf0692m34(暂无匿称)

    学习了.涨知识

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