Maleate isomerase

In enzymology, a maleate isomerase (EC5.2.1.1) is an enzyme that catalyzes the chemical reaction

Hence, this enzyme has one substrate, maleate, and one product, fumarate.

This enzyme belongs to the family of isomerases, specifically cis-trans isomerases. The systematic name of this enzyme class is maleate cis-trans-isomerase. This enzyme participates in butanoate metabolism and nicotinate and nicotinamide metabolism.