title: D-amino acid N-acetyltransferase of Saccharomyces cerevisiae: a close homologue of histone acetyltransferase Hpa2p acting exclusively on free D-amino acids.
abstract: D-Amino acid N-acetyltransferase is a unique enzyme of Saccharomyces cerevisiae acting specifically on D-amino acids. The enzyme was found to be encoded by HPA3, a putative histone/protein acetyl transferase gene, and we purified its gene product, Hpa3p, from recombinant Escherichia coli cells. Hpa3p shares 49% sequence identity and 81% sequence similarity with a histone acetyltransferase, Hpa2p, of S. cerevisiae. Hpa3p acts on a wide range of D-amino acids but shows extremely low activity toward histone. However, Hpa2p does not act on any of the free amino acids except L-lysine and D-lysine. Kinetic analyses suggest that Hpa3p catalyzes the N-acetylation of D-amino acids through an ordered bi-bi mechanism, in which acetyl-CoA is the first substrate to be bound and CoA is the last product to be liberated.
authors.affiliation: Institute for Chemical Research, Kyoto University, Uji, Japan.
authors.forename: Geok-Yong
authors.initials: GY
authors.lastname: Yow
authors.forename: Takuma
authors.initials: T
authors.lastname: Uo
authors.forename: Tohru
authors.initials: T
authors.lastname: Yoshimura
authors.forename: Nobuyoshi
authors.initials: N
authors.lastname: Esaki
mesh_terms: D000123:Acetyltransferases / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D000595:Amino Acid Sequence; D000596:Amino Acids / Q000737:chemistry / Q000378:metabolism*; D051046:Amino-Acid N-Acetyltransferase; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics; D051548:Histone Acetyltransferases; D007700:Kinetics; D008969:Molecular Sequence Data; D011994:Recombinant Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000201:enzymology* / Q000235:genetics; D029701:Saccharomyces cerevisiae Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D017422:Sequence Analysis, DNA; D013379:Substrate Specificity
chemical_list: D000596:Amino Acids; D011994:Recombinant Proteins; D029701:Saccharomyces cerevisiae Proteins; D000123:Acetyltransferases; D051046:Amino-Acid N-Acetyltransferase; D051548:Histone Acetyltransferases