New pathways of methoxy carotenoid formation in Rhodospirillum rubrum
نویسندگان
چکیده
منابع مشابه
Alternative pathways of spirilloxanthin biosynthesis in Rhodospirillum rubrum.
Detailed studies of the properties of carotenoids isolated from diphenylamine-inhibited cultures of Rhodospirillum rubrum have revealed a number of novel structures that indicate new features of carotenoid biosynthesis in the photosynthetic bacteria. Both neurosporene and 7,8,11,12-tetrahydrolycopene undergo hydration, methylation and dehydrogenation to yield spheroidene and 11',12'-dihydrosphe...
متن کاملPhotosynthesis in Rhodospirillum rubrum
Ribulose 1,5-diphosphate carboxylase has been isolated from autotrophically cultured Rhoclospirillum rubrum. The molecular weight is 120,000. The K, for ribulose 1,5diphosphate is 83 mM, and for CO2 is 59 mM. The enzyme is inhibited by three important metabolites: citrate, an intermediate of the tricarboxylic acid cycle; inorganic phosphate; and 3-phosphoglyceric acid, the product of the reacti...
متن کاملPhotosynthesis in Rhodospirillum rubrum
Ribulose 1,5-diphosphate carboxylase has been isolated from autotrophically cultured Rhoclospirillum rubrum. The molecular weight is 120,000. The K, for ribulose 1,5diphosphate is 83 mM, and for CO2 is 59 mM. The enzyme is inhibited by three important metabolites: citrate, an intermediate of the tricarboxylic acid cycle; inorganic phosphate; and 3-phosphoglyceric acid, the product of the reacti...
متن کاملThe Structure of Rhodospirillum rubrum
Cells from serial cultures of R. rubrum, grown anaerobically in the light, were harvested at intervals from (1/2) to 15 days and sectioned for electron microscopy by conventional methods. Cells of this species possess a multilayered outer envelope, and the external cell surface is differentiated into ridges extending parallel or obliquely to the long axis of the cell. Cells from very young cult...
متن کاملHomoserine Dehydrogenase of Rhodospirillum rubrum
Homoserine dehydrogenase catalyzes the reductive conversion of aspartate P-semialdehyde to homoserine (l), which has been identified in several microorganisms as a precursor of three other amino acids. On the one hand, homoserine is converted to methionine, and through a separate sequence of reactions is transformed to threonine, a precursor of isoleucine (2). Recent studies (3-7) have provided...
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ژورنال
عنوان ژورنال: Biochemical Journal
سال: 1969
ISSN: 0306-3283
DOI: 10.1042/bj1130034pb