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4. The cellular source for APOBEC3G's incorporation into HIV-1

Author

Guo Fei, Zhou Jinming, Jia Pingping, Liu Zhenlong, Zhang Quan, Xu Jian, Li Xiaoyu, Ma Jing, You Xuefu, Yu Liyan, Zhao Lixun, Jiang Jiandong, and Cen Shan

Subjects
Immunologic diseases. Allergy, RC581-607
Abstract

Abstract Background Human APOBEC3G (hA3G) has been identified as a cellular inhibitor of HIV-1 infectivity. Viral incorporation of hA3G is an essential step for its antiviral activity. Although the mechanism underlying hA3G virion encapsidation has been investigated extensively, the cellular source of viral hA3G remains unclear. Results Previous studies have shown that hA3G forms low-molecular-mass (LMM) and high-molecular-mass (HMM) complexes. Our work herein provides evidence that the majority of newly-synthesized hA3G interacts with membrane lipid raft domains to form Lipid raft-associated hA3G (RA hA3G), which serve as the precursor of the mature HMM hA3G complex, while a minority of newly-synthesized hA3G remains in the cytoplasm as a soluble LMM form. The distribution of hA3G among the soluble LMM form, the RA LMM form and the mature forms of HMM is regulated by a mechanism involving the N-terminal part of the linker region and the C-terminus of hA3G. Mutagenesis studies reveal a direct correlation between the ability of hA3G to form the RA LMM complex and its viral incorporation. Conclusions Together these data suggest that the Lipid raft-associated LMM A3G complex functions as the cellular source of viral hA3G.

Published
2011
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8. Functional analysis of the two cytidine deaminase domains in APOBEC3G

Author

Li, Xiaoyu, primary, Ma, Jing, additional, Zhang, Quan, additional, Zhou, Jinming, additional, Yin, Xiao, additional, Zhai, Congjie, additional, You, Xuefu, additional, Yu, Liyan, additional, Guo, Fei, additional, Zhao, Lixun, additional, Li, Zelin, additional, Zeng, Yi, additional, and Cen, Shan, additional

Published
2011
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9. The cellular source for APOBEC3G's incorporation into HIV-1

Author

Ma, Jing, primary, Li, Xiaoyu, additional, Xu, Jian, additional, Zhang, Quan, additional, Liu, Zhenlong, additional, Jia, Pingping, additional, Zhou, Jinming, additional, Guo, Fei, additional, You, Xuefu, additional, Yu, Liyan, additional, Zhao, Lixun, additional, Jiang, Jiandong, additional, and Cen, Shan, additional

Published
2011
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