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1.4.3.25
evolution
L-arginine oxidase evolves from a highly thermostable and promiscuous FAD-dependent amino acid oxidase
763957
1.4.3.25
physiological function
growth on L-arginine as the sole source of carbon and nitrogen induces synthesis of the enzymes of a catabolic pathway for arginine. The catabolic sequence in this pathway is: L-arginine - alpha-ketoarginine - gamma-guanidinobutanoate - gamma-aminobutanoate. Cell-free extracts of cultures grown on L-arginine produce ammonia from L-arginine, CO2 from alpha-ketoarginine, and show hydrolytic removal of urea from gamma-guanidinobutanoate
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740642
1.4.3.25
physiological function
mutant cells lacking L-amino acid oxidase protein cannot grow on L-arginine as sole N-source. Mutant cells can grow on nitrate or ammonium as N-source under photoautotropic conditions with a growth rate of about 75% of the wild-type rate. Under these conditions the photosynthetic O2 evolving activity is reduced by about the same amount, and the pigment content, especially the phycobiliprotein content, is much lower than in wild-type
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740093
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