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Cell Res:揭示范可尼贫血症相关蛋白FAAP24的结构与功能

2013-10-29 中国科学技术大学生科院 中国科学技术大学生科院

近日,中国科学技术大学生命科学学院田长麟研究组和生物物理所龚为民研究组、美国德州大学安德森癌症中心的李磊研究组合作开展了对范可尼贫血症相关蛋白FAAP24的结构和功能研究:解析了该蛋白的两个结构域的溶液核磁结构;揭示了其具有特异性结合单链DNA的活性,以及参与结合的关键残基;证明了其在DNA损伤修复中所扮演的角色,既依赖于FAAP24-FANCM异二聚体的形成,又与FAAP24的单链DNA结合能力

近日,中国科学技术大学生命科学学院田长麟研究组和生物物理所龚为民研究组、美国德州大学安德森癌症中心的李磊研究组合作开展了对范可尼贫血症相关蛋白FAAP24的结构和功能研究:解析了该蛋白的两个结构域的溶液核磁结构;揭示了其具有特异性结合单链DNA的活性,以及参与结合的关键残基;证明了其在DNA损伤修复中所扮演的角色,既依赖于FAAP24-FANCM异二聚体的形成,又与FAAP24的单链DNA结合能力密切相关。FAAP24中双结构域的动态变化导致该蛋白难以结晶,但是高场核磁共振顺利解析了该结构。

范可尼贫血症(Fanconi anemia, FA)是一种DNA损伤修复缺陷相关的疾病,该病让细胞不能修复DNA损伤而导致多种癌症,尤其是白血病等癌症。FA相关蛋白FAAP24及其结合蛋白FANCM将其他FA蛋白定位到DNA损伤的位点,在DNA损伤修复过程中起着非常重要的作用。本研究解析了FAAP24的两个结构域(ERCC4结构域和(HhH)2结构域)的溶液结构,并揭示了FAAP24通过其(HhH)2结构域与单链DNA相互作用。随后的大量的基于结构的点突变和细胞内功能实验证明了FAAP24通过(HhH)2结构域,与FANCM形成异二聚体、与单链DNA结合,两者对于FAAP24在FA通路中发挥功能都是至关重要的。

相关研究结果于2013年9月3日以“Structure analysis of FAAP24 reveals single-stranded DNA-binding activity and domain functions in DNA damage response”为题在线发表于Cell Research杂志上。田长麟研究组的吴芳明博士、安德森癌症中心的王玉才与生物物理所的韩肖是文章的共同第一作者。

应用高场核磁共振方法,田长麟研究组的研究生赖超华解析了人源整合素蛋白α1的跨膜及胞内区在去污剂中的溶液结构,并分析了其与β1的跨膜及胞内区的相互作用,为进一步研究整合素α1/β1介导的双向的细胞信号传导通路提供了结构基础。相关研究结果已经以“Integrin α1 Has a Long Helix, Extending from the Transmembrane Region to the Cytoplasmic Tail in Detergent Micelles”为题正式发表在PLOS ONE杂志上。

田长麟研究组的研究生孙德猛参与了中科院遗传发育所刘佳佳研究员主持的囊泡运输的分子机制研究,相关合作研究工作已经以“PtdIns(4)P regulates retromer–motor interaction to facilitate dynein–cargo dissociation at the trans-Golgi network”为题正式发表在Nature Cell Biology杂志上。

原文出处:

Wang Y, Han X, Wu F, Leung JW, Lowery MG, Do H, Chen J, Shi C, Tian C, Li L, Gong W.Structure analysis of FAAP24 reveals single-stranded DNA-binding activity and domain functions in DNA damage response.Cell Res. 2013 Oct;23(10):1215-28. doi: 10.1038/cr.2013.124. 

Lai C, Liu X, Tian C, Wu F.Integrin α1 has a long helix, extending from the transmembrane region to the cytoplasmic tail in detergent micelles.PLoS One. 2013 Apr 30;8(4):e62954. doi: 10.1371/journal.pone.0062954. 

Niu Y, Zhang C, Sun Z, Hong Z, Li K, Sun D, Yang Y, Tian C, Gong W, Liu JJ.PtdIns(4)P regulates retromer-motor interaction to facilitate dynein-cargo dissociation at the trans-Golgi network.Nat Cell Biol. 2013 Apr;15(4):417-29. doi: 10.1038/ncb2710. 

 


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    2013-12-21 维他命
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  5. [GetPortalCommentsPageByObjectIdResponse(id=1776801, encodeId=e1db1e76801bc, content=<a href='/topic/show?id=5b989244667' target=_blank style='color:#2F92EE;'>#贫血症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=111, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=92446, encryptionId=5b989244667, topicName=贫血症)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=81a339030187, createdName=medscijoin, createdTime=Wed Apr 02 12:32:00 CST 2014, time=2014-04-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1723565, encodeId=84bf1e23565c3, content=<a href='/topic/show?id=dde98e1711d' target=_blank style='color:#2F92EE;'>#范可尼贫血#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=80, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=87171, encryptionId=dde98e1711d, topicName=范可尼贫血)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3e7533484263, createdName=chenlianhui, createdTime=Tue Mar 04 01:32:00 CST 2014, time=2014-03-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1958941, encodeId=b27c19589410b, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Sat Dec 21 20:32:00 CST 2013, time=2013-12-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1868702, encodeId=b1431868e0248, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Wed Jul 30 04:32:00 CST 2014, time=2014-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1633184, encodeId=40bf1633184db, content=<a href='/topic/show?id=c0bf168341' target=_blank style='color:#2F92EE;'>#AAP#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=1683, encryptionId=c0bf168341, topicName=AAP)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=89e022034329, createdName=ylz8410, createdTime=Mon Dec 23 02:32:00 CST 2013, time=2013-12-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1805628, encodeId=b4b8180562818, content=<a href='/topic/show?id=89e6e8575ae' target=_blank style='color:#2F92EE;'>#结构与功能#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78575, encryptionId=89e6e8575ae, topicName=结构与功能)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/4v5DMqK7WnzoBdibNsryQ8OEM5gFSdRH9j3HNCKPfKXlObInweOSHdQPATeTicYp7nvg3bsgicjLgRkdlhrpry21w/132, createdBy=6bf82500013, createdName=ms5822920152752585, createdTime=Tue May 27 17:32:00 CST 2014, time=2014-05-27, status=1, ipAttribution=)]
    2013-12-23 ylz8410
  6. [GetPortalCommentsPageByObjectIdResponse(id=1776801, encodeId=e1db1e76801bc, content=<a href='/topic/show?id=5b989244667' target=_blank style='color:#2F92EE;'>#贫血症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=111, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=92446, encryptionId=5b989244667, topicName=贫血症)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=81a339030187, createdName=medscijoin, createdTime=Wed Apr 02 12:32:00 CST 2014, time=2014-04-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1723565, encodeId=84bf1e23565c3, content=<a href='/topic/show?id=dde98e1711d' target=_blank style='color:#2F92EE;'>#范可尼贫血#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=80, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=87171, encryptionId=dde98e1711d, topicName=范可尼贫血)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3e7533484263, createdName=chenlianhui, createdTime=Tue Mar 04 01:32:00 CST 2014, time=2014-03-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1958941, encodeId=b27c19589410b, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Sat Dec 21 20:32:00 CST 2013, time=2013-12-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1868702, encodeId=b1431868e0248, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Wed Jul 30 04:32:00 CST 2014, time=2014-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1633184, encodeId=40bf1633184db, content=<a href='/topic/show?id=c0bf168341' target=_blank style='color:#2F92EE;'>#AAP#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=1683, encryptionId=c0bf168341, topicName=AAP)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=89e022034329, createdName=ylz8410, createdTime=Mon Dec 23 02:32:00 CST 2013, time=2013-12-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1805628, encodeId=b4b8180562818, content=<a href='/topic/show?id=89e6e8575ae' target=_blank style='color:#2F92EE;'>#结构与功能#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78575, encryptionId=89e6e8575ae, topicName=结构与功能)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/4v5DMqK7WnzoBdibNsryQ8OEM5gFSdRH9j3HNCKPfKXlObInweOSHdQPATeTicYp7nvg3bsgicjLgRkdlhrpry21w/132, createdBy=6bf82500013, createdName=ms5822920152752585, createdTime=Tue May 27 17:32:00 CST 2014, time=2014-05-27, status=1, ipAttribution=)]
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