L-3-cyanoalanine synthase

The enzyme L-3-cyanoalanine synthase (EC 4.4.1.9) catalyzes the chemical reaction

L-cysteine + hydrogen cyanide ${\displaystyle \rightleftharpoons }$ L-3-cyanoalanine + hydrogen sulfide

L-3-cyanoalanine synthase
Identifiers
EC no.	4.4.1.9
CAS no.	9059-53-4
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Gene Ontology	AmiGO / QuickGO
Search PMC articles PubMed articles NCBI proteins

This enzyme belongs to the family of lyases, specifically the class of carbon-sulfur lyases. The systematic name of this enzyme class is L-cysteine hydrogen-sulfide-lyase (adding hydrogen cyanide L-3-cyanoalanine-forming). Other names in common use include β-cyanoalanine synthase, β-cyanoalanine synthetase, β-cyano-L-alanine synthase, and L-cysteine hydrogen-sulfide-lyase (adding HCN). This enzyme participates in cyanoamino acid metabolism.