What compound is produced during the conversion of succinyl-CoA to succinate?

During the conversion of succinyl-CoA to succinate, GTP is produced. This reaction is catalyzed by the enzyme succinyl-CoA synthetase and is one of the key steps in the Citric Acid Cycle. The process involves the cleavage of the high-energy thioester bond in succinyl-CoA, which releases energy that is used to phosphorylate GDP (guanosine diphosphate) to GTP (guanosine triphosphate).

GTP is an important energy carrier, similar to ATP, and can be readily converted to ATP if needed. The generation of GTP from this step is a point of substrate-level phosphorylation, a unique feature of this particular reaction within the cycle.

This production of GTP is significant in cellular metabolism, as it directly demonstrates how energy can be harnessed from metabolic reactions. The other compounds listed, such as ATP, NADH, and FADH2, are produced at different points in the Citric Acid Cycle and serve different roles in energy metabolism, but they are not the direct product of the conversion from succinyl-CoA to succinate.