title: [Photoinduction of carotenoid synthesis by Neurospora crassa on different structural and functional states of nitrate reductase].
abstract: In order to clarify the role of nitrate reductase as a potential photoreceptor, the ability of N. crassa mycelial cells for light-dependent accumulation of carotenoid pigments has been studied. The repression of the nitrate reductase synthesis by ammonium ions has been found not to influence the rate of the photoinduced carotenogenesis. The mutant experiments have shown that damage to the structural integrity of the nitrate reductase molecule, e, g., disintegrated synthesis of the protein fragment of the enzyme molecule (mutants nit-2 and nit-3) or the molybdenum coenzyme (mutant nit-1) does not affect the activity of the photoregulatory system of N. crassa. Thus, nitrate reductase is not a necessary component of the photoregulatory mechanism of N. crassa responsible for the synthesis of carotenoids.
mesh_terms: D002338:Carotenoids / Q000096:biosynthesis*; D004794:Enzyme Repression; D008027:Light; D009491:Neurospora / Q000378:metabolism*; D009492:Neurospora crassa / Q000378:metabolism*; D009565:Nitrate Reductases / Q000378:metabolism*
chemical_list: D002338:Carotenoids; D009565:Nitrate Reductases
vernacular_title: Fotoinduktsiia sinteza karotinoidov u Neurospora crassa pri raznom strukturnom i funktsinal'nom sostoianii nitratreduktazy.