ECHDC3, also known as Enoyl-CoA Hydratase Domain-Containing Protein 3, is an enzyme involved in fatty acid metabolism. It contains a domain typical of enoyl-CoA hydratases, which catalyze the hydration of enoyl-CoA intermediates in the β-oxidation pathway. This pathway is a key metabolic process that breaks down fatty acids into acetyl-CoA within mitochondria and peroxisomes, supporting energy production. ECHDC3 plays an important role in facilitating fatty acid β-oxidation, which ultimately helps generate ATP, the cell’s main energy source.