A carbon-nitrogen ligase. During purine ribonucleotide biosynthesis, this enzyme catalyzes the synthesis of adenylosuccinate from GTP; IMP; and aspartate with the formation of orthophosphate and GDP. EC 6.3.4.4.

Synonyms: Synthase, Adenylosuccinate, Adenylosuccinate Synthetase, Succino AMP Synthetase, Succino-AMP Synthetase, EC 6.3.4.4, IMP:L-aspartate ligase (GDP-forming), Adenylosuccinate Synthase, Synthetase, Succino-AMP, Synthetase, Adenylosuccinate