1-aminocyclopropane-1-carboxylate synthase

Jump to: navigation, search

In enzymology, a 1-aminocyclopropane-1-carboxylate synthase (EC is an enzyme that catalyzes the chemical reaction

S-adenosyl-L-methionine 1-aminocyclopropane-1-carboxylate + methylthioadenosine

Hence, this enzyme has one substrate, S-adenosyl-L-methionine, and two products, 1-aminocyclopropane-1-carboxylate and methylthioadenosine.

This enzyme belongs to the family of lyases, specifically carbon-sulfur lyases. The systematic name of this enzyme class is S-adenosyl-L-methionine methylthioadenosine-lyase (1-aminocyclopropane-1-carboxylate-forming). Other names in common use include 1-aminocyclopropanecarboxylate synthase, 1-aminocyclopropane-1-carboxylic acid synthase, 1-aminocyclopropane-1-carboxylate synthetase, aminocyclopropanecarboxylic acid synthase, aminocyclopropanecarboxylate synthase, ACC synthase, and S-adenosyl-L-methionine methylthioadenosine-lyase. This enzyme participates in propanoate metabolism. It employs one cofactor, pyridoxal phosphate.

Structural studies

As of late 2007, 6 structures have been solved for this class of enzymes, with PDB accession codes 1B8G, 1IAX, 1IAY, 1M4N, 1M7Y, and 1YNU.


External links

The CAS registry number for this enzyme class is 72506-68-4.

Gene Ontology (GO) codes