生物技术通报 ›› 2013, Vol. 0 ›› Issue (4): 201-205.

• 研究报告 • 上一篇    下一篇

LOH12CR1 互作蛋白GPS2 的筛选及鉴定

王永俊1, 王迎伟2, 施小六1, 林若蘅1, 张文婷1, 沈宏伟1   

  1. 1. 中南大学湘雅二医院,长沙 410011 ;2. 柳州市人民医院,柳州 050000
  • 收稿日期:2012-10-19 修回日期:2013-04-22 出版日期:2013-04-22 发布日期:2013-04-22
  • 作者简介:王永俊,女,博士,主治医师,研究方向:消化道肿瘤的发病机制

Screening and Identifying of GPS2 :a Novel Interactive Protein of LOH12CR1

Wang Yongjun1, Wang Yingwei2, Shi Xiaoliu1, Lin Ruoheng1, Zhang Wenting1, Shen Hongwei1   

  1. 1. The Second Xiangya Hospital of Central South University,Changsha 410011 ;2. The People’s Hospital of Liuzhou City,Liuzhou 050000
  • Received:2012-10-19 Revised:2013-04-22 Published:2013-04-22 Online:2013-04-22

摘要: 12 号染色体短臂杂合子缺失的现象存在于多种血液科肿瘤和实体瘤患者中,提示此区域中可能存在抑瘤基因, LOH12CR1 是此区域中已鉴定的基因之一。为探讨LOH12CR1 的生物学功能,首先采取酵母双杂交系统筛查其互作蛋白,鉴定到 转录调控因子GPS2 是其互作蛋白。进一步在HEK293 细胞中运用免疫共沉淀方法证实GPS2 与LOH12CR1 在体内存在相互作用; 免疫荧光共定位结果显示GPS2 与LOH12CR1 在细胞核内存在共定位信号。

关键词: LOH12CR1, GPS2, 酵母双杂交, 蛋白质相互作用, 免疫共沉淀

Abstract: Loss of heterozygosity of the short arm of chromosome 12 is a frequently observed in a wide variety of haematological malignancies and solid tumours, suggesting the presence of tumour suppressor genes in this region. LOH12CR1 is one of the genes identified in 12p12. To explore the normal function of LOH1CR12, yeast two-hybrid system was used to screen proteins interacting with LOH1CR12, and the transcriptional regulator GPS2 was identified as a LOH1CR12- interacting protein. Furthermore, GPS2 was confirmed to interact with LOH1CR12 in vivo in HEK-293 cell by co-immunoprecipitation, and the co-localization of GPS2 and LOH1CR12 in nucleus was observed by immunofluorescent co-localization.

Key words: LOH12CR1, GPS2, Yeast two-hybrid system, Interactive protein, Co-immunoprecipitation