Cleavage of the Murine Leukemia Virus Transmembrane Env Protein by Human Immunodeficiency Virus Type 1 Protease: Transdominant Inhibition by Matrix Mutations

Cleavage of the Murine Leukemia Virus Transmembrane Env Protein by Human Immunodeficiency Virus Type 1 Protease: Transdominant Inhibition by Matrix Mutations
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人类免疫缺陷病毒 1 型蛋白酶对鼠白血病病毒跨膜包膜蛋白的切割:基质突变的反显性抑制

DOI:
10.1128/jvi.72.12.9621-9627.1998
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发表时间:
1998
影响因子:
5.4
通讯作者:
E. Freed
E. Freed
中科院分区:
医学2区
文献类型:
--
作者:
R. Kiernan;E. Freed

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摘要:我们已经鉴定出人类免疫缺陷病毒 1 型 (HIV-1) 基质蛋白 (MA) 中的突变,该突变可阻断用鼠白血病病毒 (MuLV) 包膜 (Env) 糖蛋白假型化的病毒粒子的感染性,而不影响 HIV-1 Env 或水泡性口炎病毒 G 糖蛋白赋予的感染性。这种抑制非常有效,并表现出很强的反显性效应;当野生型和突变型分子克隆以 1:1 的比例共转染时,感染性可降低 100 倍以上。在共嗜性和两亲性 MuLV Env 中都观察到了这种现象。 MA 突变不影响 MuLV Env 掺入病毒粒子。我们证明,在用 MuLV Env 假型化的 HIV-1 病毒粒子中,HIV-1 蛋白酶 (PR) 有效催化 p15(E) 跨膜 (TM) 蛋白裂解为 p12(E)。假型病毒粒子的免疫沉淀分析表明,突变的 MA 阻断了 HIV-1 PR 介导的 MuLV TM 裂解。此外,突变体 MA 对野生型感染性的反显性抑制与 p15(E) 裂解的相对水平相关。与突变体 MA 所施加的感染性的消除是由于 p15(E) 裂解的抑制所致的假设一致,当用截短的 p12(E) 形式的 MuLV Env 进行假型化时,突变体病毒体的感染性明显更强。这些结果表明 HIV-1 Gag 序列可以影响病毒 PR 介导的 MuLV TM Env 蛋白 p15(E) 的加工。这些发现对于使用 MuLV Env 假型化的基于 HIV-1 的逆转录病毒载体的开发具有重要意义,因为 p15(E) 裂解对于激活膜融合和病毒感染性至关重要。
ABSTRACT We have identified mutations in the human immunodeficiency virus type 1 (HIV-1) matrix protein (MA) which block infectivity of virions pseudotyped with murine leukemia virus (MuLV) envelope (Env) glycoproteins without affecting infectivity conferred by HIV-1 Env or vesicular stomatitis virus G glycoproteins. This inhibition is very potent and displays a strong transdominant effect; infectivity is reduced more than 100-fold when wild-type and mutant molecular clones are cotransfected at a 1:1 ratio. This phenomenon is observed with both ecotropic and amphotropic MuLV Env. The MA mutations do not affect the incorporation of MuLV Env into virions. We demonstrate that in HIV-1 virions pseudotyped with MuLV Env, the HIV-1 protease (PR) efficiently catalyzes the cleavage of the p15(E) transmembrane (TM) protein to p12(E). Immunoprecipitation analysis of pseudotyped virions reveals that the mutant MA blocks this HIV-1 PR-mediated cleavage of MuLV TM. Furthermore, the transdominant inhibition exerted by the mutant MA on wild-type infectivity correlates with the relative level of p15(E) cleavage. Consistent with the hypothesis that abrogation of infectivity imposed by the mutant MA is due to inhibition of p15(E) cleavage, mutant virions are significantly more infectious when pseudotyped with a truncated p12(E) form of MuLV Env. These results indicate that HIV-1 Gag sequences can influence the viral PR-mediated processing of the MuLV TM Env protein p15(E). These findings have implications for the development of HIV-1-based retroviral vectors pseudotyped with MuLV Env, since p15(E) cleavage is essential for activating membrane fusion and virus infectivity.
在没有其他病毒蛋白的情况下,鼠白血病病毒 env 蛋白的成熟。
DOI: 10.1016/0042-6822(85)90168-0
发表时间: 1985
期刊: Virology
影响因子: 3.7
作者:
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通讯作者: Rein,A
DOI: 10.1073/pnas.86.15.5781
发表时间: 1989-08-01
影响因子: 11.1
作者:
GOTTLINGER, HG;SODROSKI, JG;HASELTINE, WA
通讯作者: HASELTINE, WA
DOI: 10.1089/aid.1990.6.721
发表时间: 1990-06
影响因子: 1.5
作者:
R. Pal;Marvin S. Reitz;Erwin Tschachler;Robert C. Gallo;M. Sarngadharan;F. D. Veronese
通讯作者: R. Pal;Marvin S. Reitz;Erwin Tschachler;Robert C. Gallo;M. Sarngadharan;F. D. Veronese
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DOI: 10.1006/jmbi.1998.1788
发表时间: 1998
期刊: Journal of molecular biology.
影响因子: --
作者:
McDonnell,JM;Fushman,D;Cahill,SM;Zhou,W;Wolven,A;Wilson,CB;Nelle,TD;Resh,MD;Wills,J;Cowburn,D
通讯作者: Cowburn,D
DOI: 10.1073/pnas.87.2.523
发表时间: 1990-01-01
影响因子: 11.1
作者:
BRYANT, M;RATNER, L
通讯作者: RATNER, L