Virology:苏州大学生物医学研究院董春升教授揭示HIV-1整合前复合物入核新机制

2018-07-11 ipsvirus 病毒学界

近期,苏州大学生物医学研究院董春升教授在《Virology》上发表了题为 “The transmembrane nucleoporin Pom121 ensures efficient HIV-1 pre-integration complex nuclear import”的研究论文,研究报道了跨膜核孔蛋白Pom121在HIV-1 PIC入核过程中的作用。

近期,苏州大学生物医学研究院董春升教授在《Virology》上发表了题为 “The transmembrane nucleoporin Pom121 ensures efficient HIV-1 pre-integration complex nuclear import”的研究论文,研究报道了跨膜核孔蛋白Pom121在HIV-1 PIC入核过程中的作用。

结果速览

人I型免疫缺陷病毒(HIV-1)属于逆转录病毒科慢病毒属,病毒能够在非分裂细胞中复制有赖于病毒整合前复合物(PIC)的入核运输,然后整合到宿主细胞的基因组上。Pom121是脊椎动物最为保守的跨膜核孔蛋白之一,已知Pom121是细胞有丝分裂后期核孔复合体组装过程中被早期募集的蛋白,并已被证明对分裂间期核膜组装形成发挥着重大作用。然而Pom121对于HIV-1 PIC入核功能作用还少有报道。该论文首次发现全长的Pom121能增加HIV-1 PIC的入核效率,促进病毒复制,为HIV-1 PIC入核转运增添了新的机制。


Fig. 1 Pom121 supports HIV-1 replication.

先前研究报道N端600氨基酸缺失的Pom121能够抑制HIV-1的复制。在此项研究中,通过luciferase病毒感染试验及对病毒基因组入核指标2-LTR的检测,发现下调Pom121可以减少PIC的入核,从而抑制病毒的感染。进一步实验表明,Pom121可以与上游核转运蛋白karyopherin-β1相互作用,介导的PIC入核转运,并且Pom121的FG结构域对于PIC的入核转运功能是必需的,该结果首次鉴定了Pom121在HIV-1PIC入核过程中的重要作用。


Fig. 2:Pom121 FG-domain is required for HIV-1 cDNA nuclear import.

结 语

该论文首次发现全长的Pom121能增加HIV-1 PIC的入核效率,促进病毒复制,为HIV-1 PIC入核转运增添了新的机制。郭晶为该论文的第一作者,参与该论文的还有刘贤贤,武传建等。苏州大学董春升教授和熊思东教授为该论文的并列通讯作者。该研究由国家自然科学基金(81101257, 31470848, 31670898 ,31470880),病毒学国家重点实验室开放研究基金项目(2017IOV003)等资金资助。

原始出处:Guo J1, Liu X1, Wu C1, et al. The transmembrane nucleoporin Pom121 ensures efficient HIV-1 pre-integration complex nuclear import. Virology. 2018 Jun 25;521:169-174. 

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    2018-07-22 jyzxjiangqin

    生物医学研究院的研究。

    0

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阿兹海默病是新药研发人员难以逾越的鸿沟。早在 100 多年前,人们就已发现了它的存在。但直到现在,我们依旧没有开发出一款有效预防或治疗这种神经退行性疾病的新药。更夸张的是,最近一系列临床试验的失利表明,β淀粉样蛋白这个过去几十年的主攻方向,可能压根就不是真正的病因。可以说在阿兹海默病面前,人类显得一筹莫展。

Nat Commun:新研究发现一种新的非传统免疫细胞可以对抗病毒感染

由伯明翰大学领导的研究发现了一种新的非传统免疫细胞可以对抗病毒感染。这项研究于近日发表在《Nature Communications》上,聚焦于控制我们免疫系统的T细胞,该研究由他们与荷兰学术医学中心和俄罗斯科学技术研究所合作完成。

Semin Arthritis Rheu:病毒感染作为类风湿性关节炎危险因素的系统评价

Parvo B19、HCV和可能的EBV感染后存在RA风险。CMV和HBV感染与RA无关。CHIKV与持续性炎性关节炎相关。