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N-Acetyl-l-glutamate kinase (NAGK), the structural paradigm of the enzymes of the amino acid kinase family, catalyzes the phosphorylation of the γ-COO − group of N-acetyl-l-glutamate (NAG) by ATP. We determine here the crystal structures of NAGK complexes with MgADP, NAG and the transition-state analog AlF 4− ; with MgADP and NAG; and with ADP and SO 42− . Comparison...
N-Acetyl-L-glutamate kinase (NAGK), a member of the amino acid kinase family, catalyzes the second and frequently controlling step of arginine synthesis. The Escherichia coli NAGK crystal structure to 1.5 A resolution reveals a 258-residue subunit homodimer nucleated by a central 16-stranded molecular open β sheet sandwiched between α helices. In each subunit, AMPPNP, as an αβγ-phosphate-Mg 2...
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