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The zinc finger antiviral protein (ZAP) is a recently isolated host antiviral factor. It specifically inhibits the replication of Moloney murine leukemia virus (MLV) and Sindbis virus (SIN) by preventing the accumulation of viral RNA in the cytoplasm. For this report, we mapped the viral sequences that are sensitive to ZAP inhibition. The viral sequences(More)
The rat zinc-finger antiviral protein (ZAP) was recently identified as a host protein conferring resistance to retroviral infection. We analyzed ZAP's ability to inhibit viruses from other families and found that ZAP potently inhibits the replication of multiple members of the Alphavirus genus within the Togaviridae, including Sindbis virus, Semliki Forest(More)
Viral infections cause profound alterations in host cells. Here, we explore the interactions between proteins of the Alphavirus Sindbis and host factors during the course of mammalian cell infection. Using a mutant virus expressing the viral nsP3 protein tagged with green fluorescent protein (GFP) we directly observed nsP3 localization and isolated(More)
The zinc finger antiviral protein (ZAP) is a host factor with potent antiviral activity when overexpressed in cells. ZAP blocks replication of the prototype alphavirus Sindbis virus (SINV) at a step at or before translation of the incoming viral genome. The mechanism of ZAP anti-SINV activity and the determinants of its antiviral function, however, have not(More)
We are interested in characterizing the cellular machinery involved in the restriction of retrovirus replication-the components of the innate or ''intrinsic'' immunity. Studies of two such systems will be presented. In the first example, we have identified components involved in tran-scriptional silencing of proviral DNA by Embryonic Stem (ES) cells. It has(More)
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