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Curr Biol:浙江大学汪方炜研究组解析保护染色体稳定性新机制

2017-04-04 佚名 生物帮

近日,国际著名学术杂志《Cell》子刊《Current Biology》杂志在线发表了浙江大学细胞信号网络协同创新中心汪方炜实验室题为“The N-Terminal Non-Kinase Domain-Mediated Binding of Haspin to Pds5B Protects Centromeric Cohesion in Mitosis”的研究论文,论文解析了保护染色体稳定性的新机

近日,国际著名学术杂志《Cell》子刊《Current Biology》杂志在线发表了浙江大学细胞信号网络协同创新中心汪方炜实验室题为“The N-Terminal Non-Kinase Domain-Mediated Binding of Haspin to Pds5B Protects Centromeric Cohesion in Mitosis”的研究论文,论文解析了保护染色体稳定性的新机制。汪方炜实验室的博士生周琳莉和梁材为本文共同第一作者,汪方炜教授是本文的通讯作者。

细胞的有丝分裂是一个严密的过程,通过复杂而精细的调控来实现配对姐妹染色单体均等地分配至子细胞,任何细微的错误都可能导致染色体不稳定性、非整倍体以及癌症的发生发展。黏连蛋白复合体(cohesin)维持姐妹染色单体配对,并促进染色体与纺锤体的正确连接。在有丝分裂的初期,染色体臂上的cohesin复合体在其调节亚基Wapl的作用下被大量地去除,而着丝粒区的cohesin必须得以保留才能防止染色体的错误分离。以往的研究显示,癌细胞的染色体不稳定性多数是由于着丝粒区姐妹染色体粘连缺陷造成的。姐妹染色体粘连的调控机制是细胞生物学领域的重要研究课题。

汪方炜实验室研究发现,蛋白激酶Haspin通过位于氨基端非激酶域的一个保守基序(motif)与cohesin的调节亚基Pds5B直接结合;而且,Haspin与Pds5B的结合能竞争性地阻碍Wapl以类似的方式与Pds5B相结合。敲除Haspin或特异性地破坏Haspin与Pds5B的结合,会造成着姐妹染色体粘连的缺陷,使得染色体不能正常整列并提前分离;而抑制Wapl的活性或恢复着丝粒区Haspin与Pds5B的结合,则可以防止姐妹染色体粘连缺陷的发生。这些结果表明,Haspin通过结合Pds5B拮抗了Wapl对着丝粒区cohesin的去除,保证了姐妹染色单体的正常粘连和正确分离,从而保护了染色体的稳定性。

此研究不仅揭示了Haspin作为cohesin复合体调节亚基的新功能,而且解析了姐妹染色体粘连调控的新机制,是细胞分裂及染色体生物学等相关研究领域的重要进展。这项研究成果对于深入理解染色体粘连缺陷、染色体不稳定性及癌症之间的关系具有重要意义。

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    2017-12-16 hongbochen
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encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Fri Oct 13 16:28:00 CST 2017, time=2017-10-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767086, encodeId=50881e67086bc, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Fri Mar 09 23:28:00 CST 2018, time=2018-03-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187024, encodeId=461e18e024ed, content=好文章大家学!, beContent=null, objectType=article, channel=null, level=null, likeNumber=125, replyNumber=0, topicName=null, 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createdTime=Thu Apr 06 13:28:00 CST 2017, time=2017-04-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185295, encodeId=a577185295e3, content=讲的非常棒 非常好很实用, beContent=null, objectType=article, channel=null, level=null, likeNumber=118, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eo2GMhevabZrvYIDhcYQOadp8uNxP2luzicRh5E0OHqMU9kYxib3dV5Qsd9UASTrkcc9ibiaN90Zwo1Tw/132, createdBy=275f1684782, createdName=wang_shengli, createdTime=Wed Apr 05 09:42:28 CST 2017, time=2017-04-05, status=1, ipAttribution=)]
    2017-10-13 sunylz
  5. 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  6. 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createdTime=Thu Apr 06 13:28:00 CST 2017, time=2017-04-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185295, encodeId=a577185295e3, content=讲的非常棒 非常好很实用, beContent=null, objectType=article, channel=null, level=null, likeNumber=118, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eo2GMhevabZrvYIDhcYQOadp8uNxP2luzicRh5E0OHqMU9kYxib3dV5Qsd9UASTrkcc9ibiaN90Zwo1Tw/132, createdBy=275f1684782, createdName=wang_shengli, createdTime=Wed Apr 05 09:42:28 CST 2017, time=2017-04-05, status=1, ipAttribution=)]
    2017-04-13 大爰

    好文章大家学!

    0

  7. 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encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Fri Oct 13 16:28:00 CST 2017, time=2017-10-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767086, encodeId=50881e67086bc, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Fri Mar 09 23:28:00 CST 2018, time=2018-03-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187024, encodeId=461e18e024ed, content=好文章大家学!, beContent=null, objectType=article, channel=null, level=null, likeNumber=125, replyNumber=0, topicName=null, 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createdTime=Thu Apr 06 13:28:00 CST 2017, time=2017-04-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185295, encodeId=a577185295e3, content=讲的非常棒 非常好很实用, beContent=null, objectType=article, channel=null, level=null, likeNumber=118, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eo2GMhevabZrvYIDhcYQOadp8uNxP2luzicRh5E0OHqMU9kYxib3dV5Qsd9UASTrkcc9ibiaN90Zwo1Tw/132, createdBy=275f1684782, createdName=wang_shengli, createdTime=Wed Apr 05 09:42:28 CST 2017, time=2017-04-05, status=1, ipAttribution=)]
    2017-04-08 大爰

    新理论学习了!

    0

  8. 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createdTime=Thu Apr 06 13:28:00 CST 2017, time=2017-04-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185295, encodeId=a577185295e3, content=讲的非常棒 非常好很实用, beContent=null, objectType=article, channel=null, level=null, likeNumber=118, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eo2GMhevabZrvYIDhcYQOadp8uNxP2luzicRh5E0OHqMU9kYxib3dV5Qsd9UASTrkcc9ibiaN90Zwo1Tw/132, createdBy=275f1684782, createdName=wang_shengli, createdTime=Wed Apr 05 09:42:28 CST 2017, time=2017-04-05, status=1, ipAttribution=)]
    2017-04-07 春暖花开8785

    解密染色体密码,有望治疗基因性疾病。

    0

  9. 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likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib06iaV3D9Tg5Kym1A9qicflExZYSdibSZBHDyicKZZj37w4jR44fPa9DI3mVLObHAxzntpTAbwxeHvviclcw8coNrDge/0, createdBy=6dc22001775, createdName=春暖花开8785, createdTime=Fri Apr 07 09:51:29 CST 2017, time=2017-04-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1331637, encodeId=ec44133163e7f, content=<a href='/topic/show?id=d85a6181e4d' target=_blank style='color:#2F92EE;'>#染色体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=61817, encryptionId=d85a6181e4d, topicName=染色体)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTKnILSXam1GxPwj04ylEzibYLFA2eGl5Ev02klt80JA0xejMPqrn0mYHNNnLEgyqYTPbicXpY3tn6SA/132, createdBy=38fd2500059, createdName=新生儿张玉军, createdTime=Thu Apr 06 13:28:00 CST 2017, time=2017-04-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185295, encodeId=a577185295e3, content=讲的非常棒 非常好很实用, beContent=null, objectType=article, channel=null, level=null, likeNumber=118, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eo2GMhevabZrvYIDhcYQOadp8uNxP2luzicRh5E0OHqMU9kYxib3dV5Qsd9UASTrkcc9ibiaN90Zwo1Tw/132, createdBy=275f1684782, createdName=wang_shengli, createdTime=Wed Apr 05 09:42:28 CST 2017, time=2017-04-05, status=1, ipAttribution=)]
    2017-04-05 wang_shengli

    讲的非常棒 非常好很实用

    0

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