Cysteine lyase

Definition:

EC Tree > 4 Lyases > 4.4 Carbon-sulfur lyases > 4.4.1 Carbon-sulfur lyases (only sub-subclass identified to date) > 4.4.1.10 cysteine lyase
Cysteine lyase is a pyridoxal-phosphate protein. It can use a second molecule of cysteine (producing lanthionine) or other alkyl thiols as replacing agents. It converts L-cysteine and sulfite into L-cysteate and hydrogen sulfide. It appears in viruses and cellular organisms. Structurally it is a PLP-dependent cysteine desulfurase.

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