KSHV reactivation and novel implications of protein isomerization on lytic switch control.

KSHV reactivation and novel implications of protein isomerization on lytic switch control.
复制标题

DOI:
10.3390/v7010072
复制
发表时间:
2015-01-12
期刊:
Viruses
影响因子:
--
通讯作者:
Lukac DM
Lukac DM
中科院分区:
其他
文献类型:
--
作者:
Guito J;Lukac DM

文献摘要

参考文献

被引文献

相似文献

在卡波西肉瘤相关疱疹病毒(KSHV)肿瘤发生中,潜伏期和再激活都被假设为增强肿瘤生长。KSHV Rta蛋白是再激活的裂解开关。Rta通过与辅因子如细胞RBP-Jk和Oct-1蛋白以及病毒Mta蛋白的相互作用反式激活必需基因。考虑到强大的病毒再活化将促进抗病毒应答并最终导致宿主细胞裂解,Rta的表达和功能的调节是潜伏裂解平衡和感染细胞命运的主要决定因素。我们的实验室最近表明,Rta反式激活需要细胞肽基脯氨酰顺式/反式异构酶Pin 1。我们的数据表明,脯氨酸定向磷酸化通过许可与Pin 1结合来调节Rta。尽管Pin 1能够刺激Rta反式激活,但未经检查的Pin 1活性抑制了病毒的产生。Pin 1的失调与人类癌症有关,而KSHV是已知的最新的一种可以替代Pin 1功能的病毒。我们认为Pin 1是一个分子计时器,可以调节病毒裂解基因表达和宿主细胞裂解之间的平衡。有趣的场景Pin 1的基本活动,以及潜在的更广泛的意义异构化的Rta和重新激活,突出显示。
In Kaposi’s sarcoma-associated herpesvirus (KSHV) oncogenesis, both latency and reactivation are hypothesized to potentiate tumor growth. The KSHV Rta protein is the lytic switch for reactivation. Rta transactivates essential genes via interactions with cofactors such as the cellular RBP-Jk and Oct-1 proteins, and the viral Mta protein. Given that robust viral reactivation would facilitate antiviral responses and culminate in host cell lysis, regulation of Rta’s expression and function is a major determinant of the latent-lytic balance and the fate of infected cells. Our lab recently showed that Rta transactivation requires the cellular peptidyl-prolyl cis/trans isomerase Pin1. Our data suggest that proline‑directed phosphorylation regulates Rta by licensing binding to Pin1. Despite Pin1’s ability to stimulate Rta transactivation, unchecked Pin1 activity inhibited virus production. Dysregulation of Pin1 is implicated in human cancers, and KSHV is the latest virus known to co-opt Pin1 function. We propose that Pin1 is a molecular timer that can regulate the balance between viral lytic gene expression and host cell lysis. Intriguing scenarios for Pin1’s underlying activities, and the potential broader significance for isomerization of Rta and reactivation, are highlighted.
Kaposi肉瘤相关的疱疹病毒调节蛋白的翻译后修饰 - SUMO和KSHV。
DOI: 10.3389/fmicb.2012.00031
发表时间: 2012
影响因子: 5.2
作者:
Campbell M;Izumiya Y
通讯作者: Izumiya Y
DOI: 10.1128/jvi.00862-08
发表时间: 2008-10-01
影响因子: 5.4
作者:
Chang, Pey-Jium;Shedd, Duane;Miller, George
通讯作者: Miller, George
DOI: 10.1016/s0002-9440(10)63731-5
发表时间: 2004-05-01
影响因子: 6
作者:
Bao, L;Kimzey, A;Wang, DG
通讯作者: Wang, DG
DOI: 10.1128/jvi.00076-09
发表时间: 2009-07-15
影响因子: 5.4
作者:
Dalton-Griffin, Lucy;Wilson, Sam J.;Kellam, Paul
通讯作者: Kellam, Paul
DOI: 10.1038/sj.onc.1208783
发表时间: 2005-09-22
期刊: ONCOGENE
影响因子: 8
作者:
Curry, CL;Reed, LL;Foreman, KE
通讯作者: Foreman, KE