title: Effect of amino acids on peptide transport in sake yeast.
abstract: The PTR 2 gene of Saccharomyces cerevisiae encodes a major peptide permease responsible for the uptake of low-molecular-weight peptides consisting of two or three amino acids. We show that the PTR 2 gene of sake yeast encodes a major peptide permease in the main mash of sake brewing. The peptide uptake activity in sake yeast is decreased by the addition of certain types of amino acids, particularly asparagine, serine and lysine. Northern blot analysis suggested that asparagine and serine repress the expression of the PTR 2 gene, but lysine decreases the peptide transport activity without repressing PTR 2 gene transcription. The deletion analysis of the PTR 2 promoter region confirmed these suggestions and revealed that the cis-element involved in the regulation of the PTR 2 gene by amino acids is located in the region from residue --400 to the start codon.
authors.affiliation: General Research Laboratory of Kiku-Masamune Sake Brewing Co., Ltd., 1-8-6 Uozaki-nishimachi, Higashinada-ku, Kobe 658-0026, Japan. ta-yamada@kikumasamune.co.jp
authors.forename: Tasuku
authors.initials: T
authors.lastname: Yamada
authors.forename: Keiji
authors.initials: K
authors.lastname: Furukawa
authors.forename: Shodo
authors.initials: S
authors.lastname: Hara
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Mizoguchi
mesh_terms: D019943:Amino Acid Substitution; D000596:Amino Acids / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D026901:Membrane Transport Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism* / Q000502:physiology*; D010455:Peptides / Q000493:pharmacokinetics*; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D013329:Structure-Activity Relationship; D014920:Wine / Q000382:microbiology*
chemical_list: D000596:Amino Acids; D026901:Membrane Transport Proteins; C093495:PTR2 protein, S cerevisiae; D010455:Peptides; D029701:Saccharomyces cerevisiae Proteins; C043912:peptide permease