This domain family is found in bacteria and eukaryotes, and is approximately 160 amino acids in length. The family is found in association with Pfam:PF00120. This family is the N terminal region of glutamine synthetase type III which is one of the enzymes responsible for generation of glutamine through conversion glutamate to glutamine by the incorporation of ammonia (NH3).

1: Biochemical and mutational analysis of glutamine synthetase type III from the rumen anaerobe Ruminococcus albus 8. Amaya KR, Kocherginskaya SA, Mackie RI, Cann IK; J Bacteriol. 2005;187:7481-7491. PMID:16237031