HIV-1 interacts with numerous cellular proteins during viral replication. Identifying such host proteins and characterizing their roles in HIV-1 infection can deepen our understanding of the dynamic interplay between host and pathogen. We previously identified non-POU domain-containing octamer-binding protein (NonO or p54nrb) as one of host factors associated with catalytically active preintegration complexes (PIC) of HIV-1 in infected CD41 T cells. NonO is involved in nuclear processes including transcriptional regulation and RNA splicing. Although NonO has been identified as an HIV-1 interactant in several recent studies, its role in HIV-1 replication has not been characterized. We investigated the effect of NonO on the HIV-1 life cycle in CD4 1
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