title: Cloning, sequencing and expressing the carotenoid biosynthesis genes, lycopene cyclase and phytoene desaturase, from the aerobic photosynthetic bacterium Erythrobacter longus sp. strain Och101 in Escherichia coli.
abstract: Two genes which encode the enzymes lycopene cyclase and phytoene desaturase in the aerobic photosynthetic bacterium Erythrobacter longus sp. strain Och101 have been cloned and sequenced. The gene for lycopene cyclase, designated crtY, was expressed in a strain of Escherichia coli which contained the crtE, B, I and Z genes encoding geranylgeranyl pyrophosphate synthase, phytoene synthase, phytoene desaturase, and beta-carotene hydroxylase, respectively. As a result, zeaxanthin production was observed in E. coli transformants. In addition, expression of the E. longus gene crtI for phytoene desaturase in E. coli containing crtE and B resulted in the accumulation of lycopene in transformants. Zeaxanthin and lycopene were also determined by mass spectrum. Nucleotide sequence similarities between E. longus crtY gene and other microbial lycopene cyclase genes are 40.2% (Erwinia herbicola), 37.4% (Erwinia uredovora) and 22.9% (Synechococcus sp.), and those between phytoene desaturase genes are 50.3% (E. herbicola), 54.7% (E. uredovora) and 39.6% (Rhodobacter capsulatus).
authors.affiliation: Asahi Chemical Industry Co., Ltd., Fuji-city, Shizuoka, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Matsumura
authors.forename: H
authors.initials: H
authors.lastname: Takeyama
authors.forename: E
authors.initials: E
authors.lastname: Kusakabe
authors.forename: J G
authors.initials: JG
authors.lastname: Burgess
authors.forename: T
authors.initials: T
authors.lastname: Matsunaga
mesh_terms: D000595:Amino Acid Sequence; D001419:Bacteria / Q000201:enzymology* / Q000235:genetics*; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000235:genetics* / Q000302:isolation & purification; D001483:Base Sequence; D002338:Carotenoids / Q000096:biosynthesis* / Q000235:genetics; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics*; D015964:Gene Expression Regulation, Bacterial; D005822:Genetic Vectors; D019753:Intramolecular Lyases; D007535:Isomerases / Q000096:biosynthesis / Q000235:genetics* / Q000302:isolation & purification; D008969:Molecular Sequence Data; D010088:Oxidoreductases / Q000096:biosynthesis / Q000235:genetics* / Q000302:isolation & purification; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000302:isolation & purification
chemical_list: D001426:Bacterial Proteins; D011994:Recombinant Proteins; D002338:Carotenoids; D010088:Oxidoreductases; C022398:phytoene dehydrogenase; D007535:Isomerases; D019753:Intramolecular Lyases; C070925:lycopene cyclase-isomerase