Racemiase, an enzyme which catalyses racemization of lactic acids

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Racemiase, an enzyme which catalyses racemization of lactic acids.

SO-CAETID fermentation lactic acids are generally believed to be inactive, since it was ascertained by Phelps & Palmer [1917] and Pederson et al. [1926] that optically inactive lactic acid was produced in many natural fermentations. The lactic acid in Sake was found to be the inactive form, although not only inactive lactic acid-producing organisms (Lactobacillus sake), but also optically activ...

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Racemization of Meteoritic Amino Acids

Meteorites may have contributed amino acids to the prebiotic Earth, affecting the global ratio of right-handed to left-handed (D/ L) molecules. We calculate D/ L ratios for seven biological, α-hydrogen, protein amino acids over a variety of plausible parent body thermal histories, based on meteorite evidence and asteroid modeling. We show that amino acids in meteorites do not necessarily underg...

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An extracellular enzyme from Fusarium solani f. sp. phaseoli which catalyses hydration of the isoflavonoid phytoalexin, phaseollidin.

Among the antimicrobial phytoalexins produced by Phaseolus vulgaris (French bean) are the prenylated isoflavonoids kievitone and phaseollidin. Two enzyme activities, kievitone hydratase and phaseollidin hydratase, occur in culture filtrates of the bean pathogen, Fusarium solani f. sp. phaseoli, and catalyse similar hydration reactions on the dimethylallyl moieties of the phytoalexins. The enzym...

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Racemization of amino acids in marine sediments.

Isoleucine, one of several amino acids isolated from a suite of welldated deep-sea cores, shows a progressive increase in the degree of racemization with the age of the sediment. Amino acids in sediments show an initial rate of racemization almost an order of magnitude faster than the rate observed for free amino acids at a comparable pH and temperature. The observed kinetics depend on a variet...

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Mechanisms of catalyses: opposing relationship with enzyme stability.

Nakamura, S. & Hayashi, S. (1974) FEBSLett. 41,327-330 Pazur, J. H., Knull, H. R. and Simpson, D. L. (1970) Biochem. Biophys. Res. Commun. 40, 110-1 16 Ryle, M., Chaplin, M. F., Gray, C. J. & Kennedy, J. F. (1970) in Gonadotrophins and Ovarian Development (Butt, W. R., Crooke, A. C. & Ryle, M., eds.), pp. 98-106, Livingstone, Edinburgh 1081-1087 Samy, T. S. A. (1967) Arch Biochem. Biophys. 121,...

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ژورنال

عنوان ژورنال: Biochemical Journal

سال: 1937

ISSN: 0306-3283

DOI: 10.1042/bj0310909