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环指蛋白RING1与A型核纤层蛋白的细胞内相互作用

In vivo Interation of RING1 and Lamin A

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【作者】 陈维春; 宋杰; 刘振杰; 蒋智文; 袁源; 郑慧玲; 刘新光;

【Author】 CHEN Wei-Chun1,2)**,SONG Jie1)**,LIU Zhen-Jie2,3),JIANG Zhi-Wen1,2), YUAN Yuan1),ZHENG Hui-Ling1,2),LIU Xin-Guang1,2)***(1) Institute of Aging Research,Guangdong Medical College,Dongguan 523808,China; 2) Institute of Biochemistry & Molecular Biology,Guangdong Medical College,Zhanjiang 524023,China; 3) Guangdong Provincial Hospital of Chinese Medicine,Guangzhou 510120,China)

【机构】 广东医学院衰老研究所; 广东医学院生物化学与分子生物学研究所; 广东省中医院检验科;

【摘要】 环指蛋白RING1能结合DNA并抑制基因的转录.采用酵母双杂交方法从人骨骼肌文库中筛选出了与A型核纤层蛋白(lamin A)结合的RING1蛋白,回复杂交酵母能在缺陷培养基上生长.RING1与绿色荧光蛋白融合载体转染HEK293细胞,激光共聚焦显微观察发现RING1能与带红色荧光蛋白的lamin A蛋白在细胞核周围共定位.免疫共沉淀结果证明RING1与lamin A能够相互作用.结果证明了一个新的lamin A结合蛋白,为揭示lamin A影响基因表达乃至细胞衰老提供了依据.

【Abstract】 RING1 can bind to DNA and inhibit some gene transcription.RING1 was identified to interact with lamin A by screening a human skeletal muscle library in a yeast two-hybrid interacting screen.The results of one to one reverse hybridization indicated that AH109 transfected with RING1 and lamin A constructs could grow on SD/-Leu/-Trp/-Ade/-His medium.RING1 was inserted into pEGFP-N1 vector and the constructs including pDsRed-LA and pEGFP-RING1 was used to transfect HEK293 cells.Visualized by laser confocal microscopy,RING1 and Lamin A were co-located around nucleus.Interatcion of RING1 and lamin A was comfirmed by immunoprecipitations.These results showed a new lamin A binding protein that can present some evidence for lamin A acting on gene expression and cell senescence.

【关键词】 RING1; 核纤层蛋白A; 相互作用; 酵母双杂交;
【Key words】 RING1; lamin A; interaction; yeast two-hybrid;
【基金】 国家自然科学基金(30672205,30871440,30900739);广东省自然科学基金(7301506,9252402301000002)资助项目;广东省高校自然科学研究重点项目(06Z015);东莞市科技计划项目(2008108101062);湛江市科技攻关项目(2009C3104005)~~
  • 【文献出处】 生物化学与生物物理进展 ,Progress in Biochemistry and Biophysics , 编辑部邮箱 ,2011年01期
  • 【分类号】Q343
  • 【被引频次】1
  • 【下载频次】205
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