Beta oxidation of hexanoyl-CoA to butanoyl-CoA

The sixth pass through the beta-oxidation spiral picks up where the last left off with the saturated fatty acid hexanoyl-CoA and produces butanoyl-CoA. Four enzymatic steps are required starting with SCAD CoA dehydrogenase (Short Chain) activity, followed by the enoyl-CoA hydratase activity of crotonase, the 3-hydroxyacyl-CoA dehydrogenase activity of the short chain 3-hydroxyacyl-CoA dehydrogenase (SCHAD), and completed by the ketoacyl-CoA thiolase activity, present in the mitochondrial membrane associated trifunctional protein.

Summary from Reactome (R-HSA-77350), read 2026-09-23.