In this study, the role of the nuclear protein SPOC1 for HIV-1 replication was investigated. SPOC1 was shown to increase proviral integration and hence the total number of infected cells. Nonetheless, SPOC1 was degraded by the viral accessory protein Vpr post integration. This degradation evolved most likely due to repressive effects of SPOC1 on viral gene expression. Hence, SPOC1 is not a bona-fide antiviral restriction factor but is important for efficient HIV-1 integration. At later steps, Vpr degrades SPOC1 to counteract its antiviral functions.
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In this study, the role of the nuclear protein SPOC1 for HIV-1 replication was investigated. SPOC1 was shown to increase proviral integration and hence the total number of infected cells. Nonetheless, SPOC1 was degraded by the viral accessory protein Vpr post integration. This degradation evolved most likely due to repressive effects of SPOC1 on viral gene expression. Hence, SPOC1 is not a bona-fide antiviral restriction factor but is important for efficient HIV-1 integration. At later steps, Vp...
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