In enzymology, a succinate—CoA ligase (GDP-forming) is an enzyme that catalyzes the chemical reaction The 3 substrates of this enzyme are GTP, succinate, and CoA, whereas its 3 products are GDP, phosphate, and succinyl-CoA. This enzyme belongs to the family of ligases, specifically those forming carbon-sulfur bonds as acid-thiol ligases. The systematic name of this enzyme class is succinate:CoA ligase (GDP-forming). Other names in common use include succinyl-CoA synthetase (GDP-forming), succinyl coenzyme A synthetase (guanosine diphosphate-forming), succinate thiokinase, succinic thiokinase, succinyl coenzyme A synthetase, succinate-phosphorylating enzyme, P-enzyme, SCS, G-STK, succinyl coenzyme A synthetase (GDP-forming), succinyl CoA synthetase, and succinyl coenzyme A synthetase. This enzyme participates in the citric acid cycle and propanoate metabolism.

Structural studies

As of late 2007, 6 structures have been solved for this class of enzymes, with PDB accession codes, , , , , and.