Enzyme:4.4.1.8

Upper Levels: EC4.-.-.- Lyases. : EC4.4.-.- Carbon-sulfur lyases. : EC4.4.1.- Carbon-sulfur lyases.

IDs and Links
IUBMB	EC4
ExPaSy	NiceZyme 4.4.1.8

cystathionine L-homocysteine-lyase (deaminating)
Systematic Name	cystathionine L-homocysteine-lyase (deaminating)
Common Name	cystathionine beta-lyase beta-cystathionase cystine lyase

L-Cystine = 2 L-Cysteine (links: (2R) -2-Amino-3- (2-amino-3-hydroxy-3-oxopropyl) disulfanylpropanoic acid = L-Cysteine)
(2R) -2-Amino-3- (2-amino-3-hydroxy-3-oxopropyl) disulfanylpropanoic acid <Mapping> AtomMap:BMAAS3SF0006$BMAAS3SF0003$0 L-Cysteine 6 ↔ 1 7 ↔ 2 8 ↔ 3 9 ↔ 4 10 ↔ 5 (2R) -2-Amino-3- (2-amino-3-hydroxy-3-oxopropyl) disulfanylpropanoic acid <Mapping> AtomMap:BMAAS3SF0006$BMAAS3SF0003$1 (2nd) L-Cysteine 1 ↔ 1 2 ↔ 2 3 ↔ 3 4 ↔ 4 5 ↔ 5

Seleno-L-cystathionine + H2O => Seleno-L-homocysteine + Pyruvic acid + NH3 (links: Seleno-L-cystathionine = Seleno-L-homocysteine + 2-Oxo-propanoic acid + NH3)
Seleno-L-cystathionine <Mapping> AtomMap:BMAXS4MT0001$BMAXDP--c016$0 Seleno-L-homocysteine 5 ↔ 1 6 ↔ 2 7 ↔ 3 8 ↔ 4 9 ↔ 5 Seleno-L-cystathionine <Mapping> AtomMap:BMAXDP--c016$BMFYS3CAp025$0 2-Oxo-propanoic acid 1 ↔ 1 2 ↔ 2 3 ↔ 3 Seleno-L-cystathionine <Mapping> AtomMap:BMAXDP--c016$BMIONT--0004$1 (2nd) NH3 4 ↔ 1

L-Cystathionine + H2O => L-Homocysteine + Pyruvic acid + NH3 (links: L-Cystathionine = L-Homocysteine + 2-Oxo-propanoic acid + NH3)
L-Cystathionine <Mapping> AtomMap:BMAAS4SF0002$BMFYB4CAf021$0 L-Homocysteine 1 ↔ 1 2 ↔ 2 3 ↔ 3 4 ↔ 4 5 ↔ 5 6 ↔ 6 L-Cystathionine <Mapping> AtomMap:BMFYB4CAf021$BMFYS3CAp025$0 2-Oxo-propanoic acid 7 ↔ 1 8 ↔ 2 9 ↔ 3 L-Cystathionine <Mapping> AtomMap:BMFYB4CAf021$BMIONT--0004$1 (2nd) NH3 10 ↔ 1