succinate-CoA ligase complex succinate-CoA ligase complex (GDP-forming) A heterodimeric enzyme complex, usually composed of an alpha and beta chain. Functions in the TCA cycle, hydrolyzing succinyl-CoA into succinate and CoA, thereby forming GTP. cellular_component GO:0045245 GO:0045244 succinyl-CoA synthetase, GDP-forming GO:0008325