Distribution of .OMEGA.-amino acid: Pyruvate transaminase and aminobutyrate: .ALPHA.-Ketoglutarate transaminase in microorganisms.
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چکیده
منابع مشابه
Aromatic amino acid transaminase in rat intestine.
The transamination of aromatic l-amino acids (5-hydroxytryptophan, tryptophan, tyrosine, phenylalanine and kynurenine) was shown to be catalysed by enzyme preparations from rat small intestine. On the basis of the partial purification and characterization of these aromatic amino acid transaminases, it is suggested that rat small intestine contains several kinds of aromatic amino acid transamina...
متن کاملStreptomyces 8 - Alanine : & - Ketoglutarate Aminotransferase , a Novel a - Amino Acid Transaminase
An enzyme which catalyzes the transamination of 8alanine with a-ketoglutarate was purified to homogeneity from Streptomyces griseus IF0 3102 and crystallized. Molecular weight of the enzyme was found to be 185,000 f 10,000 by a gel-filtration method. The enzyme consists of four subunits identical in molecular weight (61,000 f 1,000). The transaminase is composed of 483 amino acids/subunit conta...
متن کاملReaction of Pyridoxamine - Pyruvate Transaminase Sulfhydryl Reagents
Wherever the point has been examined (e.g. References l-6), pyridoxal phosphate enzymes have been found to require free sulfhydryl groups for activity. The functional role played by these groups, however, has not been clear. In glutamate-oxaloacetate transaminase, which has been studied most extensively, no spectrophotometric or enzymatic evidence for their participation in coenzyme binding was...
متن کاملRegulation of tyrosine- -ketoglutarate transaminase in rat liver.
The role of the pancreatic hormones, insulin and glucagon, in the regulation of hepatic tyrosine transaminase (L-tyrosine : Z-oxoglutarate aminotransferase, EC 2.6.1.5) was studied in adrenalectomized rats. Each of these hormones initiated a rapid but limited increase in the enzyme level, which reached a maximum after 2.5 to 3 hours. The optimal doses of insulin and glucagon per 100 g of body w...
متن کاملMetabolic adaptations in rat hepatomas. II. Tryptophan pyrrolase and tyrosine alpha-ketoglutarate transaminase.
The administration of t ryptophan or cortisone to rats bearing the Morris 5123 Hepatoma resulted in significant increases in t ryptophan pyrrolase activity in the host liver but in no change in the low tryptophan pyrrolase activity of the neoplasm. The repressed level of this enzyme in the neoplasm was not a result of the lack or excess of cofactors or enzymes necessary for the assay procedure ...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1983
ISSN: 0002-1369,1881-1280
DOI: 10.1271/bbb1961.47.2257