title: Identification of human herpesvirus 6 uracil-DNA glycosylase gene.
abstract: Uracil-DNA glycosylase encoded in many species functions as a DNA repair enzyme that removes uracil residues from DNA. To investigate the potential function of uracil-DNA glycosylase encoded by human herpes-virus 6 (HHV-6), we sequenced a DNA clone (pSTY09), identified an open reading frame of 765 bp and compared the putative amino acid sequence with other uracil-DNA glycosylases, by computer analysis. The amino acid sequence of HHV-6 had similarities to other uracil-DNA glycosylases, with the highest degree of similarity to those of human cytomegalovirus and Epstein-Barr virus. Two strongly conserved regions in uracil-DNA glycosylase of other species also existed in HHV-6. The gene product which was expressed in Escherichia coli demonstrated uracil-DNA glycosylase activity. This is the first report to identify and characterize the uracil-DNA glycosylase gene in HHV-6.
authors.affiliation: Department of Virology, Research Institute for Microbial Diseases, Osaka University, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: T
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Isegawa
authors.forename: K
authors.initials: K
authors.lastname: Yamanishi
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D017124:Conserved Sequence; D045647:DNA Glycosylases; D004279:DNA, Viral / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification; D004926:Escherichia coli; D005814:Genes, Viral; D015654:Herpesvirus 6, Human / Q000201:enzymology* / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D007700:Kinetics; D008969:Molecular Sequence Data; D009699:N-Glycosyl Hydrolases / Q000096:biosynthesis / Q000235:genetics* / Q000378:metabolism; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000378:metabolism; D015183:Restriction Mapping; D017386:Sequence Homology, Amino Acid; D051981:Uracil-DNA Glycosidase; D015678:Viral Structural Proteins / Q000235:genetics*
chemical_list: D004279:DNA, Viral; D011994:Recombinant Proteins; D015678:Viral Structural Proteins; D045647:DNA Glycosylases; D009699:N-Glycosyl Hydrolases; D051981:Uracil-DNA Glycosidase