Modulation of the stability and activities of HIV-1 Tat by its ubiquitination and carboxyl-terminal region.
Modulation of the stability and activities of HIV-1 Tat by its ubiquitination and carboxyl-terminal region.
复制标题
通过泛素化和羧基末端区域调节 HIV-1 Tat 的稳定性和活性
DOI:
10.1186/2045-3701-4-61
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发表时间:
2014
影响因子:
7.5
通讯作者:
Li D
中科院分区:
文献类型:
--
作者:
Zhang L;Qin J;Li Y;Wang J;He Q;Zhou J;Liu M;Li D
BackgroundThe transactivator of transcription (Tat) protein of human immunodeficiency virus type 1 (HIV-1) is known to undergo ubiquitination. However, the roles of ubiquitination in regulating Tat stability and activities are unclear. In addition, although the 72- and 86-residue forms are commonly used forin vitrostudies, the 101-residue form is predominant in the clinical isolates of HIV-1. The influence of the carboxyl-terminal region of Tat on its functions remains unclear.ResultsIn this study, we find that Tat undergoes lysine 48-linked ubiquitination and is targeted to proteasome-dependent degradation. Expression of various ubiquitin mutants modulates Tat activities, including the transactivation of transcription, induction of apoptosis, interaction with tubulin, and stabilization of microtubules. Moreover, the 72-, 86- and 101-residue forms of Tat also exhibit different stability and aforementioned activities.ConclusionsOur findings demonstrate that the ubiquitination and carboxyl-terminal region of Tat are critical determinants of its stability and activities.
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影响因子:
14.9
作者:
López-Huertas MR;Callejas S;Abia D;Mateos E;Dopazo A;Alcamí J;Coiras M
通讯作者:
Coiras M
影响因子:
3.3
作者:
de Mareuil J;Carre M;Barbier P;Campbell GR;Lancelot S;Opi S;Esquieu D;Watkins JD;Prevot C;Braguer D;Peyrot V;Loret EP
通讯作者:
Loret EP
影响因子:
4.8
作者:
Col, E;Caron, C;Khochbin, S
通讯作者:
Khochbin, S
影响因子:
4.8
作者:
Huo, Lihong;Li, Dengwen;Zhou, Jun
通讯作者:
Zhou, Jun
影响因子:
3.9
作者:
Kumar, Santosh;Maiti, Souvik
通讯作者:
Maiti, Souvik