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AAK_NAGK-UC: N-Acetyl-L-glutamate kinase - uncharacterized (NAGK-UC). This domain is similar to Escherichia coli and Pseudomonas aeruginosa NAGKs which catalyze the phosphorylation of the gamma-COOH group of N-acetyl-L-glutamate (NAG) by ATP in the second step of microbial arginine biosynthesis. These uncharacterized domain sequences are found in some bacteria (Deinococci and Chloroflexi) and archea and belong to the Amino Acid Kinase Superfamily (AAK).