title: Casein kinase II phosphorylates bovine papillomavirus type 1 E1 in vitro at a conserved motif.
abstract: The E1 protein of bovine papillomavirus type 1 (BPV-1) is a phosphoprotein which specifically binds and unwinds the virus replication origin by ATP-dependent helicase activity. The El protein has been shown to be multiply phosphorylated in vivo, although the sites of modification are incompletely mapped. Examination of the predicted amino acid sequence of all available E1 proteins revealed strong conservation between amino acids 25 and 60 of a motif consisting of a serine residue followed by a stretch of acidic residues. This conserved motif resembled a phosphorylation consensus site for the ubiquitous cellular kinase casein kinase II (CKII). Biochemical and mutational analysis demonstrated that the BPV- 1 E1 protein is an in vitro substrate for CKII at the serine within this conserved motif.
authors.affiliation: Department of Medical Microbiology and Immunology, Texas A&M University Health Science Center, College Station 77843-1114, USA.
authors.forename: G D
authors.initials: GD
authors.lastname: McShan
authors.forename: V G
authors.initials: VG
authors.lastname: Wilson
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D052688:Bovine papillomavirus 1 / Q000235:genetics / Q000378:metabolism*; D047390:Casein Kinase II; D002417:Cattle; D003001:Cloning, Molecular; D017124:Conserved Sequence; D012777:Cottontail rabbit papillomavirus / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000737:chemistry* / Q000378:metabolism*; D003670:Deer; D004926:Escherichia coli; D006801:Humans; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D016366:Open Reading Frames; D027383:Papillomaviridae / Q000378:metabolism; D010766:Phosphorylation; D017346:Protein Serine-Threonine Kinases / Q000378:metabolism*; D011817:Rabbits; D011993:Recombinant Fusion Proteins / Q000737:chemistry / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D014764:Viral Proteins / Q000737:chemistry* / Q000378:metabolism*
chemical_list: D004268:DNA-Binding Proteins; C069814:E1 protein, Bovine papillomavirus; D011993:Recombinant Fusion Proteins; D014764:Viral Proteins; D047390:Casein Kinase II; D017346:Protein Serine-Threonine Kinases