Enzyme:4.4.1.1

L-cystathionine cysteine-lyase (deaminating)
Systematic Name	L-cystathionine cysteine-lyase (deaminating)
Common Name	cystathionine gamma-lyase homoserine deaminase homoserine dehydratase cystine desulfhydrase cysteine desulfhydrase

L-Homoserine => 2-Oxo-butanoic acid + NH3
(links: 2S-Amino-4-hydroxybutyric Acid = 2-Oxo-butanoic acid + NH3)

2S-Amino-4-hydroxybutyric Acid	<Mapping> AtomMap:BMAXS4HO0001$BMFYS4CAp006$0	2-Oxo-butanoic acid
	1 ↔ 1 2 ↔ 2 3 ↔ 3 4 ↔ 4

2S-Amino-4-hydroxybutyric Acid	<Mapping> AtomMap:BMAXS4HO0001$BMIONT--0004$0	NH3
	5 ↔ 1

Seleno-L-cystathionine + H2O => 2-Oxo-butanoic acid + Seleno-L-cysteine + NH3
(links: Seleno-L-cystathionine + Seleno-L-cysteine = 2-Oxo-butanoic acid + Seleno-L-cystathionine + NH3)

Seleno-L-cystathionine	<Mapping> AtomMap:BMAXDP--c016$BMFYS4CAp006$0	2-Oxo-butanoic acid
	5 ↔ 1 6 ↔ 2 7 ↔ 3 8 ↔ 4

Seleno-L-cysteine	<Mapping> AtomMap:BMAAS3MT0001$BMAXDP--c016$0	Seleno-L-cystathionine
	1 ↔ 1 2 ↔ 2 3 ↔ 3 4 ↔ 4

Seleno-L-cystathionine	<Mapping> AtomMap:BMAXDP--c016$BMIONT--0004$0	NH3
	9 ↔ 1

L-Cystathionine + H2O => L-Cysteine + 2-Oxo-butanoic acid + NH3
(links: L-Cysteine + L-Cystathionine = L-Cystathionine + 2-Oxo-butanoic acid + NH3)

L-Cysteine	<Mapping> AtomMap:BMAAS3SF0003$BMFYB4CAf021$0	L-Cystathionine
	1 ↔ 7 2 ↔ 8 3 ↔ 9 4 ↔ 10 5 ↔ 6

L-Cystathionine	<Mapping> AtomMap:BMFYB4CAf021$BMFYS4CAp006$0	2-Oxo-butanoic acid
	1 ↔ 1 2 ↔ 2 3 ↔ 3 4 ↔ 4

L-Cystathionine	<Mapping> AtomMap:BMFYB4CAf021$BMIONT--0004$0	NH3
	5 ↔ 1

L-Cysteine + H2O => Pyruvic acid + Hydrogen sulfide + NH3
(links: L-Cysteine + Hydrogen sulfide = 2-Oxo-propanoic acid + L-Cysteine + NH3)

L-Cysteine	<Mapping> AtomMap:BMAAS3SF0003$BMFYS3CAp025$0	2-Oxo-propanoic acid
	1 ↔ 1 2 ↔ 2 3 ↔ 3

Hydrogen sulfide	<Mapping> AtomMap:BMIOSF--0002$BMAAS3SF0003$0	L-Cysteine
	1 ↔ 5

L-Cysteine	<Mapping> AtomMap:BMAAS3SF0003$BMIONT--0004$0	NH3
	4 ↔ 1

IDs and Links
IUBMB	EC4
ExPaSy	NiceZyme 4.4.1.1