ID 6.3.1.11 DE glutamate--putrescine ligase. AN gamma-glutamylputrescine synthetase. CA ATP + L-glutamate + putrescine = ADP + gamma-L-glutamylputrescine + H(+) CA + phosphate. CC -!- Forms part of a bacterial putrescine utilization pathway. DR I3R584, GLNA2_HALMT; P78061, PUUA_ECOLI ; //