Kochs G, Haller O
Abteilung Virologie, Institut für Medizinische Mikrobiologie und Hygiene, Universität Freiburg, D-79008 Freiburg, Germany.
Proc Natl Acad Sci U S A. 1999 Mar 2;96(5):2082-6. doi: 10.1073/pnas.96.5.2082.
Interferon-induced human MxA protein belongs to the dynamin superfamily of large GTPases. It exhibits antiviral activity against a variety of RNA viruses, including Thogoto virus, an influenza virus-like orthomyxovirus transmitted by ticks. Here, we report that MxA blocks the transport of Thogoto virus nucleocapsids into the nucleus, thereby preventing transcription of the viral genome. This interaction can be abolished by a mAb that neutralizes the antiviral activity of MxA. Our results reveal an antiviral mechanism whereby an interferon-induced protein traps the incoming virus and interferes with proper transport of the viral genome to its ultimate target compartment within the infected cell.
干扰素诱导的人Mx A蛋白属于大型GTP酶的发动蛋白超家族。它对多种RNA病毒具有抗病毒活性,包括托高托病毒,一种由蜱传播的类似流感病毒的正粘病毒。在此,我们报告Mx A可阻断托高托病毒核衣壳向细胞核的转运,从而阻止病毒基因组的转录。这种相互作用可被一种中和Mx A抗病毒活性的单克隆抗体消除。我们的结果揭示了一种抗病毒机制,即干扰素诱导的蛋白捕获入侵病毒,并干扰病毒基因组向受感染细胞内最终靶区室的正常转运。