title: Cloning and expression analysis of vacuolar H+-ATPase 69-kDa catalytic subunit cDNA in citrus (Citrus unshiu marc.)1.
abstract: To investigate the mechanism of sugar accumulation in fruit vacuoles, a full length cDNA (CitVATP-A) encoding the vacuolar H+-ATPase 69-kDa catalytic subunit was isolated from a cDNA library constructed from citrus fruit (Citrus unshiu Marc.). A 2304-bp insert of CitVATP-A was coded for a 623 amino acid polypeptide with a predicted molecular mass of 68.68 kDa. The deduced amino acid sequence for CitVATP-A showed a 96.5% homology with the carrot homologue. Genomic Southern blot analysis suggested that CitVATP-A is a low-copy number gene. Northern blot analysis of leaves and fruits during the developing stages showed that the level of expression is high in young leaves and is low in mature leaves, and that it increased in both the edible parts and the peel, during fruit growth and maturity.
authors.affiliation: Faculty of Agriculture, Meiji University, Kawasaki, Kanagawa 214, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Takanokura
authors.forename: A
authors.initials: A
authors.lastname: Komatsu
authors.forename: M
authors.initials: M
authors.lastname: Omura
authors.forename: T
authors.initials: T
authors.lastname: Akihama
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D015152:Blotting, Northern; D015139:Blotting, Southern; D002957:Citrus / Q000201:enzymology / Q000235:genetics*; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000737:chemistry*; D015870:Gene Expression; D015723:Gene Library; D008969:Molecular Sequence Data; D006180:Proton-Translocating ATPases / Q000737:chemistry / Q000235:genetics*; D016415:Sequence Alignment
chemical_list: D018076:DNA, Complementary; D006180:Proton-Translocating ATPases