title: Identification and light-induced expression of a novel gene of NADPH-protochlorophyllide oxidoreductase isoform in Arabidopsis thaliana.
abstract: In Arabidopsis thaliana, we identified a novel gene of a NADPH-protochlorophyllide oxidoreductase (POR) isoform, which catalyzes the light-dependent protochlorophyllide a reduction in the chlorophyll (Chl) biosynthetic pathway. The deduced amino acid sequence of the novel POR isoform (PORC) showed significant identities ( approximately 75%) with the previously isolated two POR isoforms of A. thaliana. Contrasting with these POR isoforms, the PORC transcript increased in etiolated seedlings by illumination, and was dominantly expressed in immature and mature tissues. The present results demonstrated that Chl biosynthesis and chloroplast biogenesis in A. thaliana are controlled by three POR isoforms, which are differentially controlled by light and development.
authors.affiliation: Department of Biological Sciences, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, 226-8501, Yokohama, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Oosawa
authors.forename: T
authors.initials: T
authors.lastname: Masuda
authors.forename: K
authors.initials: K
authors.lastname: Awai
authors.forename: N
authors.initials: N
authors.lastname: Fusada
authors.forename: H
authors.initials: H
authors.lastname: Shimada
authors.forename: H
authors.initials: H
authors.lastname: Ohta
authors.forename: K
authors.initials: K
authors.lastname: Takamiya
mesh_terms: D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000201:enzymology* / Q000235:genetics* / Q000254:growth & development; D003001:Cloning, Molecular; D004790:Enzyme Induction; D005091:Exons / Q000235:genetics; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D007438:Introns / Q000235:genetics; D007527:Isoenzymes / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics; D008027:Light; D008969:Molecular Sequence Data; D010088:Oxidoreductases / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics*; D044925:Oxidoreductases Acting on CH-CH Group Donors; D010802:Phylogeny; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D016415:Sequence Alignment
chemical_list: D007527:Isoenzymes; D012333:RNA, Messenger; D010088:Oxidoreductases; D044925:Oxidoreductases Acting on CH-CH Group Donors; C023886:protochlorophyllide reductase