title: Molecular cloning and mRNA expression profiling of the first specific jasmonate biosynthetic pathway gene allene oxide synthase from Hyoscyamus niger.
abstract: In the endeavor to enhance the production of pharmaceutically valuable tropane alkaloids including hyoscyamine and scopolamine in Hyoscyamus niger, methyl jasmonate (MeJA) showed significant stimulation both in tropane biosynthetic pathway enzymes activities and tropane alkaloids yields. Therefore it was speculated that genetic engineering of jasmonate biosynthetic pathway might enhance the endogenous jasmonate concentration, followed by stimulating the production of tropane alkaloids. Herein a full-length cDNA encoding allene oxide synthase (AOS, EC 4.2.1.92), the first committed step enzyme in jasmonate biosynthetic pathway was reported (named HnAOS, GenBank accession: EF532599). HnAOS was a novel member of the cytochrome P450 (CYP74A) subfamily. Real-time quantitative PCR analysis showed that HnAOS mRNA accumulated mainly in stems, and responded significantly to wounding or methyl jasmonate.
authors.affiliation: State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Morgan-Tan International Center for Life Sciences, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: K
authors.initials: K
authors.lastname: Jiang
authors.forename: Y
authors.initials: Y
authors.lastname: Pi
authors.forename: Zh
authors.initials: Zh
authors.lastname: Huang
authors.forename: R
authors.initials: R
authors.lastname: Hou
authors.forename: Zh
authors.initials: Zh
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Lin
authors.forename: X
authors.initials: X
authors.lastname: Sun
authors.forename: K
authors.initials: K
authors.lastname: Tang
mesh_terms: D001483:Base Sequence; D003001:Cloning, Molecular; D003517:Cyclopentanes / Q000378:metabolism*; D020869:Gene Expression Profiling; D015971:Gene Expression Regulation, Enzymologic / Q000502:physiology*; D018506:Gene Expression Regulation, Plant / Q000502:physiology*; D032304:Hyoscyamus / Q000201:enzymology* / Q000235:genetics; D019746:Intramolecular Oxidoreductases / Q000096:biosynthesis* / Q000235:genetics; D008969:Molecular Sequence Data; D054883:Oxylipins / Q000378:metabolism*; D010940:Plant Proteins / Q000096:biosynthesis* / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D018749:RNA, Plant / Q000096:biosynthesis / Q000235:genetics
chemical_list: D003517:Cyclopentanes; D054883:Oxylipins; D010940:Plant Proteins; D012333:RNA, Messenger; D018749:RNA, Plant; C011006:jasmonic acid; D019746:Intramolecular Oxidoreductases; C021377:hydroperoxide isomerase