Open AccessInteraction of Human Cytomegalovirus pUL84 with Casein Kinase 2 Is Required for oriLyt-Dependent DNA Replication
Author(s) -
Yang Gao,
Gregory S. Pari
Publication year - 2009
Publication title -
journal of virology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.617
H-Index - 292
eISSN - 1070-6321
pISSN - 0022-538X
DOI - 10.1128/jvi.02339-08
Subject(s) - biology , casein kinase 2 , replication factor c , dna replication , origin recognition complex , phosphorylation , microbiology and biotechnology , protein subunit , casein kinase 1 , lytic cycle , eukaryotic dna replication , casein kinase 2, alpha 1 , replication protein a , biochemistry , protein kinase a , dna , dna binding protein , cyclin dependent kinase 2 , gene , virology , virus , transcription factor
Human cytomegalovirus pUL84 is a phosphorylated protein that is required for lytic DNA replication and participates in regulation of virus gene expression. We previously used a proteomics assay to show that human cytomegalovirus pUL84 interacts with casein kinase 2 (CK2). We now have demonstrated that pUL84 is a substrate for CK2 in vitro, and we have determined that two putative CK2 phosphorylation sites within pUL84 mediate binding to CK2. Mutation of a threonine residue at amino acid (aa) 148 and a serine residue at aa 157 within the pUL84 protein resulted in the inability of the protein to interact with the CK2α subunit in transfected cells. Interaction of pUL84 with CK2 was essential for complementation of oriLyt-dependent DNA replication, suggesting that phosphorylation is an essential modification.