1887

Abstract

Phosphoprotein P of rinderpest virus (RPV), when expressed in , is present in the unphosphorylated form. Bacterially expressed P protein was phosphorylated by a eukaryotic cellular extract, and casein kinase II (CK II) was identified as the cellular kinase involved in phosphorylation. phosphorylation of P-deletion mutants identified the N terminus as a phosphorylation domain. phosphorylation of single or multiple serine mutants of P protein identified serine residues at 49, 88 and 151 as phospho-acceptor residues. The role of P protein phosphorylation in virus replication/transcription was evaluated using the RPV minigenome system and replication/transcription of a reporter gene . P protein phosphorylation was shown to be essential for replication/transcription since phosphorylation-null mutants do not support expression of a reporter gene. Transfection of increased amounts of phosphorylation-null mutant did not support minigenome replication/transcription .

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2004-03-01
2020-10-30
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