Cyanophycin synthase (L-arginine-adding)

Cyanophycin synthase ( L -arginine-adding) (, CphA, CphA1, CphA2, cyanophycin synthetase, multi- L -arginyl-poly- L -aspartate synthase) is an enzyme with systematic name cyanophycin: L -arginine ligase (ADP-forming). This enzyme catalyses the following chemical reaction:


 * ATP + [L-Asp(4-L-Arg)]n-L-Asp + L-Arg $$\rightleftharpoons$$ ADP + phosphate + [L-Asp(4-L-Arg)]n + 1

This enzyme requires Mg2+ for activity. This enzyme requires Mg2+ for activity. All enzymes known to have this activity also catalyze the addition of aspartate, i.e. cyanophycin synthase (L-aspartate-adding) activity. It is structurally similar to Muramyl ligases.