HIV-1 Vif Protein Mediates the Degradation of APOBEC3G in Fission Yeast When Over-expressed Using Codon Optimization

作     者：Lin LI Jing-yun LI Hong-shuai SUI Richard Y. Zhao Yong-jian LIU Zuo-yi BAO Si-yang LIU Dao-min ZHUANG 

作者机构：AIDS Research Department State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and Epidemiology Being 100071 China Department of Pathology Department of Microbiology- Immunology Institute of Human Virology University of Maryland 10 South Pine Street MSTF7OOA Baltimore MD 21201 USA 

出 版 物：《Virologica Sinica》 (中国病毒学（英文版）)

年 卷 期：2008年第23卷第4期

页      面：255-264页

核心收录：

学科分类：1007[医学-药学(可授医学、理学学位)] 100705[医学-微生物与生化药学] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 1001[医学-基础医学(可授医学、理学学位)] 100103[医学-病原生物学] 100401[医学-流行病与卫生统计学] 10[医学] 

基　　金：National Grand Fundamental Research 973 Program of China (2006CB504206) 

主　　题：HIV Vif protein APOBEC3G Fission yeast (Schizosaccharomyces pombe) 

摘      要：Interaction between the HIV-1 Vif protein and the cellular host APOBEC3G protein is a promising target for inhibition of HIV-1 replication. Considering that human cells are a very complicated environment for the study of protein interactions, the goal of this study was to check whether fission yeast could be used as a model cell for studying the Vif-APOBEC3G interaction. Vif and APOBEC3G were expressed in fusion with GFP protein in the S. pombe SP223 strain. Subcellular localizations of Vif and APOBEC3G were observed with fluorescent microscopy. Codon optimization was used to over express the Vif protein in S. pombe cells. The degradation of APOBEC3G mediated by Vif was tested through expressing Vif and GFP-APOBEC3G proteins in the same cell. Western Blot analysis was used to measure the corresponding protein levels under different experimental conditions. The results showed that the Vif protein was predominantly localized in the nucleus of S. pombe cells, APOBEC3G was localized in the cytoplasm and concentrated at punctate bodies that were often in close proximity to the nucleus but were not necessarily restricted from other regions in the cytoplasm. Vif protein expression levels were increased significantly by using codon optimization and APOBEC3G was degraded when Vif was over-expressed in the same S. pombe cells. These results indicate that fission yeast is a good model for studying the interaction between the Vif and APOBEC3G proteins.