Conformations of bound nucleoside triphosphate effectors in aspartate transcarbamylase. Evidence for the London-Schmidt model by transferred nuclear Overhauser effects
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Transferred nuclear Overhauser effects were used to determine the conformations of ATP, CTP, and ITP bound to the regulatory site of aspartate transcarbamylase. The results are in accord with the predictions of the London-Schmidt model [London, R. E., & Schmidt, P. G. (1972) Biochemistry 11, 3136] and show that ATP and CTP bind in the anti conformation while ITP binds in the syn conformation.
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