ID   4.4.1.35
DE   L-cystine beta-lyase.
CA   L-cystine + H2O = S-sulfanyl-L-cysteine + pyruvate + NH4(+).
CC   -!- The enzyme cleaves a carbon-sulfur bond, releasing L-thiocysteine and
CC       an unstable enamine product that tautomerizes to an imine form, which
CC       undergoes a hydrolytic deamination to form pyruvate and ammonia.
CC   -!- The latter reaction, which can occur spontaneously, can also be
CC       catalyzed by EC 3.5.99.10.
CC   -!- The enzyme from Brassica oleracea var. italica (broccoli) does not
CC       act on cysteine or cystathionine.
DR   Q9SUR6, CORI3_ARATH;
//