title: Cloning and sequencing the cytosine methyltransferase gene M. CviJI from Chlorella virus IL-3A.
abstract: The Chlorella virus IL-3A gene encoding the DNA methyltransferase M.CviJI, which methylates the internal cytosine in (G/A)GC(T/C/G) sequences, was cloned and expressed in Escherichia coli. The region containing the M.CviJI gene was sequenced and a single open reading frame of 1101 bp was identified that could code for a polypeptide of 367 amino acids with a predicted molecular weight of 41,864. M.CviJI contained regions of amino acids which were similar to bacterial cytosine methyltransferases. Eighteen other Chlorella viruses, of 36 tested, contained DNA sequences which hybridized to the M.CviJI gene; DNA from some, but not all, of these 18 viruses also contained 5-methylcytosine in (G/A)GC(T/C/G) sequences.
authors.affiliation: Department of Plant Pathology, University of Nebraska, Lincoln 68583-0722.
authors.forename: S L
authors.initials: SL
authors.lastname: Shields
authors.forename: D E
authors.initials: DE
authors.lastname: Burbank
authors.forename: R
authors.initials: R
authors.lastname: Grabherr
authors.forename: J L
authors.initials: JL
authors.lastname: van Etten
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002708:Chlorella / Q000201:enzymology / Q000235:genetics*; D003001:Cloning, Molecular; D003596:Cytosine; D004251:DNA Transposable Elements; D004926:Escherichia coli / Q000235:genetics; D005814:Genes, Viral; D008780:Methyltransferases / Q000235:genetics*; D008969:Molecular Sequence Data; D009154:Mutation
chemical_list: D004251:DNA Transposable Elements; D003596:Cytosine; D008780:Methyltransferases