Wild-type, but not mutant-type, p53 enhances nuclear accumulation of the NS3 protein of hepatitis C virus.

Wild-type, but not mutant-type, p53 enhances nuclear accumulation of the NS3 protein of hepatitis C virus.
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野生型(而非突变型)p53 增强丙型肝炎病毒 NS3 蛋白的核积累。

DOI:
10.1006/bbrc.1996.5980
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发表时间:
1997
影响因子:
3.1
通讯作者:
H. Hotta
H. Hotta
中科院分区:
生物学4区
文献类型:
--
作者:
S. Ishido;Sanshiro Muramatsu;T. Fujita;Yasuhiro Iwanaga;W. Tong;Y. Katayama;M. Itoh;H. Hotta

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利用牛痘病毒-T7杂交表达系统,对丙型肝炎病毒NS3蛋白的亚细胞定位进行了研究。当单独表达时,全尺寸 NS3 (NS3F) 和羧基末端截短形式 (NS3 deltaC) 位于细胞质和细胞核中。然而,NS3F 和 NS3 deltaC,而非氨基末端和羧基末端截短形式 (NS3 deltaN deltaC),在共表达时均与野生型 p53 共定位,几乎完全位于细胞核中。 NS4A 仅部分抑制野生型 p53 诱导的 NS3F 核积累。当与突变型 p53 共表达时,NS3F 和 NS3 deltaC 均与其共定位于细胞质中。综上所述,目前的结果表明,即使在 NS4A 存在的情况下,野生型 p53 也能通过参与 NS3F 和 NS3 deltaC 的氨基末端序列来增强 NS3F 和 NS3 deltaC 的核积累,而突变型 p53 则抑制其核积累,并增强其细胞质积累。
By using vaccinia virus-T7 hybrid expression system, subcellular localization of the NS3 protein of hepatitis C virus was studied. Full-size NS3 (NS3F) and a carboxy-terminally truncated form (NS3 deltaC) were localized in the cytoplasm and the nucleus when expressed alone. However, NS3F and NS3 deltaC, but not amino- and carboxy-terminally truncated form (NS3 deltaN deltaC), were each co-localized with wild-type p53 almost exclusively in the nucleus upon co-expression. The wild-type p53-induced nuclear accumulation of NS3F was inhibited only partially by NS4A. When co-expressed with mutant-type p53, NS3F and NS3 deltaC were each co-localized with it exclusively in the cytoplasm. Taken together, the present results suggest that wild-type p53 enhances nuclear accumulation of NS3F and NS3 deltaC through the involvement of their amino-terminal sequences even in the presence of NS4A, and that mutant-type p53 inhibits their nuclear, and enhances their cytoplasmic, accumulation.
E1A 和 E1B 调节 p53 依赖性细胞凋亡。
DOI: --
发表时间: 1995
影响因子: --
作者:
White,E
通讯作者: White,E
DOI: 10.1073/pnas.89.16.7742
发表时间: 1992-08-15
影响因子: 11.1
作者:
RAO, L;DEBBAS, M;WHITE, E
通讯作者: WHITE, E