enzyme.expasy.org

ENZYME - 4.4.1.35 L-cystine beta-lyase

Accepted Name
L-cystine beta-lyase
Reaction catalysed
L-cystine + H2O = S-sulfanyl-L-cysteine + pyruvate + NH4(+)
Comment(s)
  • The enzyme cleaves a carbon-sulfur bond, releasing L-thiocysteine and an unstable enamine product that tautomerizes to an imine form, which undergoes a hydrolytic deamination to form pyruvate and ammonia.
  • The latter reaction, which can occur spontaneously, can also be catalyzed by EC 3.5.99.10.
  • The enzyme from Brassica oleracea var. italica (broccoli) does not act on cysteine or cystathionine.
Cross-references
BRENDA4.4.1.35
EC2PDB4.4.1.35
ExplorEnz4.4.1.35
KEGG Ligand Database for Enzyme Nomenclature4.4.1.35
IUBMB Enzyme Nomenclature4.4.1.35
MEDLINEFind literature relating to 4.4.1.35
MetaCyc4.4.1.35
Rhea expert-curated reactions4.4.1.35
UniProtKB/Swiss-Prot

Q9SUR6, CORI3_ARATH

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All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 4.4.1.-
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 4.4.-.-
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 4.-.-.-