Pyrroline 5-carboxylate dehydrogenase of the mitochondrial matrix of rat liver. Purification, physical and kinetic characteristics.
نویسندگان
چکیده
منابع مشابه
Purification, characterization, and crystallization of human pyrroline-5-carboxylate reductase.
Pyrroline-5-carboxylate reductase (P5CR) catalyzes the reduction of Delta1-pyrroline-5-carboxylate (P5C) to proline with concomitant oxidation of NAD(P)H to NAD(P)(+). The enzymatic cycle between P5C and proline is very important in many physiological and pathological processes. Human P5CR was over-expressed in Escherichia coli and purified to homogeneity by chromatography. Enzymatic assays of ...
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An enzyme has been purified to homogeneity from barley seedlings which has ;proline dehydrogenase' and the pyrroline-5-carboxylic acid reductase activities. The purification achieved is 39,000-fold as calculated from the proline dehydrogenase activity. The subunit molecular weight of the protein is 30 kilodaltons. The native enzyme has molecular weights up to 480 kilodaltons, depending on the b...
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A method for the purification of glutamate dehydrogenase from dogfish liver has been presented. The molecular weight of the enzyme has been determined and the sedimentation constant has been found to be invariant over a wide range of concentrations, in contrast to the bovine liver glutamate dehydrogenase. Upon electrophoresis the dogfish enzyme has been observed to migrate further than the beef...
متن کاملLocalisation of proline oxidase and Delta-pyrroline-5-carboxylic acid dehydrogenase in rat liver.
The enzymes of prolinsglutamate oxidation and the preparation of their substrates have been described by Strecker and coworkers. [ 1,3] . The presence of proline oxidase in rat liver mitochondria was described by Johnson and Strecker [2]. A rough localisation of proline oxidase and A-pyrroline&carboxylic acid dehydrogenase in locust flight muscle has been attempted by Brosemer and Veerabhadrapp...
متن کاملPyrroline-5-carboxylate reductase of Neurospora crassa; partial purification and some properties.
Previous studies (1, 2) with mutant and wild type strains of Neurospora crassa have pointed to glutamic y-semialdehyde and its spontaneously cyclized form, Al-pyrroline-5-carboxylate, as intermediates in the biosynthesis of proline. These studies, based largely on experiments in vivo, have recently been substantiated through work in vitro with extracted enzymes (3, 4). ‘The terminal step in pro...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1990
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(17)44804-6