Urea as a Selective Inhibitor of Argininosuccinate Lyase
نویسندگان
چکیده
منابع مشابه
Nitro analogs of substrates for argininosuccinate synthetase and argininosuccinate lyase.
The nitro analogs of aspartate and argininosuccinate were synthesized and tested as substrates and inhibitors of argininosuccinate synthetase and argininosuccinate lyase, respectively. The Vmax for 3-nitro-2-aminopropionic acid was found to be 60% of the maximal rate of aspartate utilization in the reaction catalyzed by argininosuccinate synthetase. Only the nitronate form of this substrate, in...
متن کاملKinetic mechanism of bovine liver argininosuccinate lyase.
The kinetic mechanism of bovine liver argininosuccinate lyase has been determined at pH 7.5, 25 degrees C. Fumarate and arginine are both noncompetitive inhibitors versus argininosuccinate. The dead-end inhibitor, succinate, is competitive versus fumarate and argininosuccinate, but noncompetitive versus arginine. Citrulline is competitive versus arginine and noncompetitive versus argininosuccin...
متن کاملIsotopic probes of the argininosuccinate lyase reaction.
The mechanism of the argininosuccinate lyase reaction has been probed by the measurement of the effects of isotopic substitution at the reaction centers. A primary deuterium isotope effect of 1.0 on both V and V/K is obtained with (2S,3R)-argininosuccinate-3-d, while a primary 15N isotope effect on V/K of 0.9964 +/- 0.0003 is observed. The 15N isotope effect on the equilibrium constant is 1.018...
متن کاملA positional isotope exchange study of the argininosuccinate lyase reaction.
15N nuclear magnetic resonance spectroscopy was used to follow the positional isotope exchange reaction of bovine liver argininosuccinate lyase. The enzyme was shown to catalyze the N-3-N-2 positional nitrogen exchange in [3-15N]argininosuccinate in the presence of excess arginase. The ratio of the positional isotope exchange rate and the rate for net substrate turnover is less than 0.15 at low...
متن کاملRefeeding syndrome in a young woman with argininosuccinate lyase deficiency☆
A severely chronically protein and calorie restricted young woman with argininosuccinate lyase deficiency developed transient refeeding syndrome (RFS) and hyperammonemia after modest diet liberalization following initiation of glycerol phenylbutyrate (GPB). The patient required IV supportive care and supplementation with potassium, magnesium and calcium. She is now doing well on GPB and an appr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: European Journal of Biochemistry
سال: 1977
ISSN: 0014-2956,1432-1033
DOI: 10.1111/j.1432-1033.1977.tb11541.x