KEGG   REACTION: R01001
Entry
R01001                      Reaction                               
Name
L-cystathionine cysteine-lyase (deaminating; 2-oxobutanoate-forming)
Definition
L-Cystathionine + H2O <=> L-Cysteine + Ammonia + 2-Oxobutanoate
Equation
Comment
multi-step reaction (see R08632+R08637)
Reaction class
RC00069  C00097_C02291
RC00348  C00109_C02291
Enzyme
Pathway
rn00260  Glycine, serine and threonine metabolism
rn00270  Cysteine and methionine metabolism
rn01100  Metabolic pathways
rn01110  Biosynthesis of secondary metabolites
rn01230  Biosynthesis of amino acids
Module
M00338  Cysteine biosynthesis, homocysteine + serine => cysteine
M00609  Cysteine biosynthesis, methionine => cysteine
Orthology
K01758  cystathionine gamma-lyase [EC:4.4.1.1]
K17217  cystathionine gamma-lyase / homocysteine desulfhydrase [EC:4.4.1.1 4.4.1.2]
Other DBs
RHEA: 14008

KEGG   REACTION: R08632
Entry
R08632                      Reaction                               
Name
L-cystathionine cysteine-lyase
Definition
L-Cystathionine <=> L-Cysteine + 2-Aminobut-2-enoate
Equation
Comment
a part of multi-step reaction (R01001, R08632+R08637)
subsequently R08637
Reaction class
RC00069  C00097_C02291
RC02309  C02291_C17234
Enzyme
Other DBs
RHEA: 24913

KEGG   REACTION: R08637
Entry
R08637                      Reaction                               
Name
2-Aminobut-2-enoate aminohydrolase (spontaneous)
Definition
2-Aminobut-2-enoate + H2O <=> 2-Oxobutanoate + Ammonia
Equation
Comment
spontaneous
two-step reaction (see R11101+R11098)
Reaction class
RC02311  C00109_C17234

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