ID 6.3.2.60 DE glutamate--[amino group carrier protein] ligase. CA [amino-group carrier protein]-C-terminal-L-glutamate + ATP + L-glutamate CA = [amino-group carrier protein]-C-terminal-gamma-(L-glutamyl)-L-glutamate CA + ADP + H(+) + phosphate. CC -!- The enzyme, originally characterized from the archaeon Sulfolobus CC acidocaldarius, is involved in L-arginine biosynthesis. CC -!- The enzyme from the archaeon Thermococcus kodakarensis is CC bifunctional and also catalyzes the activity of EC 6.3.2.43. //