The enzyme
L-cysteate sulfo-lyase (EC 4.4.1.25)
catalyzes
Catalysis () is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst (). Catalysts are not consumed in the reaction and remain unchanged after it. If the reaction is rapid and the catalyst recyc ...
the reaction
:
L-cysteate + H
2O = hydrogensulfite + pyruvate + NH
3 (overall reaction)
::(1a)
L-cysteate = hydrogensulfite + 2-aminoprop-2-enoate
::(1b) 2-aminoprop-2-enoate = 2-iminopropanoate (spontaneous)
::(1c) 2-iminopropanoate + H
2O = pyruvate + NH
3 (spontaneous)
This enzyme belongs to the family of
lyase
In biochemistry, a lyase is an enzyme that catalyzes the breaking (an elimination reaction) of various chemical bonds by means other than hydrolysis (a substitution reaction) and oxidation, often forming a new double bond or a new ring structure. ...
s, specifically the class of carbon-sulfur lyases. The
systematic name of this enzyme class is
L-cysteate bisulfite-lyase (deaminating; pyruvate-forming). Other names in common use include
L-cysteate sulfo-lyase (deaminating), and CuyA.
References
*
EC 4.4.1
Enzymes of unknown structure
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