Dissection of the functional domains of Escherichia coli carbamoyl phosphate synthetase by site-directed mutagenesis.

Abstract excerpt

The catalytic functions of the amino-terminal and carboxyl-terminal halves of the large subunit of carbamoyl phosphate synthetase from Escherichia coli have been identified using site-directed mutagenesis. Glycine residues at positions 176, 180, and 722 within the putative mononucleotide-binding site were replaced with isoleucine residues. Each of these mutations resulted in at least a 1 order of magnitude...

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