Abstract
The p12 protein, required for both early and late viral functions, is the predominant phosphorylated viral protein of Moloney MLV and is required for virus viability. Our studies indicate that the N terminus of p12 represses the early function of the chromatin binding domain and that deletion of the N terminus activates chromatin binding in the wild-type Moloney MLV p12 protein. Mass spectrometry and mutagenesis studies suggest that phosphorylation of both the repression domain and the chromatin binding domain acts to temporally regulate this process at the appropriate stages during infection.
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