EC Explorer

6.3.2.30

cyanophycin synthase (L-arginine-adding)

ATP + [L-Asp(4-L-Arg)]_n-L-Asp + L-Arg = ADP + phosphate + [L-Asp(4-L-Arg)]_n+1

CphA (ambiguous), CphA1 (ambiguous), CphA2 (ambiguous), cyanophycin synthetase (ambiguous), multi-L-arginyl-poly-L-aspartate synthase (ambiguous)

cyanophycin:L-arginine ligase (ADP-forming)

131554-17-1

Requires Mg²⁺ for activity. Both this enzyme and EC 6.3.2.29, cyanophycin synthase (L-aspartate-adding), are required for the elongation of cyanophycin, which is a protein-like cell inclusion that is unique to cyanobacteria and acts as a temporary nitrogen store [2]. Both enzymes are found in the same protein but have different active sites [2,4]. Both L-Asp and L-Arg must be present before either enzyme will display significant activity [2]. Canavanine and lysine can be incoporated into the polymer instead of arginine [2].

created 2007