L-lactate/malate dehydrogenase (IPR001557)

Short name: L-lactate/malate_DH

Overlapping homologous superfamilies

Family relationships


This family contains both lactate and malate dehydrogenases. Malate dehydrogenases catalyse the interconversion of malate to oxaloacetate. The enzyme participates in the citric acid cycle.

L-lactate dehydrogenase (EC: (LDH) [PMID: 3430615] catalyses the reversible NAD-dependent interconversion of pyruvate to L-lactate. In vertebrate muscles and in lactic acid bacteria it represents the final step in anaerobic glycolysis. This tetrameric enzyme is present in prokaryotic and eukaryotic organisms. In vertebrates there are three isozymes of LDH: the M form (LDH-A), found predominantly in muscle tissues; the H form (LDH-B), found in heart muscle and the X form (LDH-C), found only in the spermatozoa of mammals and birds. In birds and crocodilian eye lenses, LDH-B serves as a structural protein and is known as epsilon-crystallin [PMID: 3174623].

L-2-hydroxyisocaproate dehydrogenase (EC:1.1.1) (L-hicDH) [PMID: 2684788] catalyses the reversible and stereospecific interconversion between 2-ketocarboxylic acids and L-2-hydroxy-carboxylic acids. L-hicDH is evolutionary related to LDH's.

GO terms

Biological Process

GO:0019752 carboxylic acid metabolic process
GO:0055114 oxidation-reduction process

Molecular Function

GO:0016616 oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.