View source for L-cysteate sulfo-lyase

{{Short description|Enzyme that lyses  L-cysteate into pyruvate}}
{{infobox enzyme
| Name       = <small>L</small>-cysteate sulfo-lyase
| EC_number  = 4.4.1.25
| CAS_number =
| GO_code    =
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The enzyme '''<small>L</small>-cysteate sulfo-lyase''' (EC 4.4.1.25) [[catalysis|catalyzes]] the reaction
:<small>L</small>-cysteate + H<sub>2</sub>O = hydrogensulfite + pyruvate + NH<sub>3</sub> (overall reaction)
::(1a) <small>L</small>-cysteate = hydrogensulfite + 2-aminoprop-2-enoate
::(1b) 2-aminoprop-2-enoate = 2-iminopropanoate (spontaneous)
::(1c) 2-iminopropanoate + H<sub>2</sub>O = pyruvate + NH<sub>3</sub> (spontaneous)
This enzyme belongs to the family of [[lyase]]s, specifically the class of carbon-sulfur lyases.  The [[List of enzymes|systematic name]] of this enzyme class is '''<small>L</small>-cysteate bisulfite-lyase (deaminating; pyruvate-forming)'''. Other names in common use include '''<small>L</small>-cysteate sulfo-lyase (deaminating)''', and '''CuyA'''.
==References==
{{reflist|1}}
* {{cite journal |vauthors=Denger K, Smits TH, Cook AM | date = 2006 | title = <small>L</small>-Cysteate sulpho-lyase, a widespread pyridoxal 5′-phosphate-coupled desulphonative enzyme purified from ''Silicibacter pomeroyi'' DSS-3(T) | journal = Biochem. J.  | volume = 394 | pages = 657&ndash;64  | pmid = 16302849 | doi = 10.1042/BJ20051311 | issue = Pt 3 | pmc = 1383715 }}
{{Carbon-sulfur lyases}}
{{Enzymes}}
{{Portal bar|Biology|border=no}}
[[Category:EC 4.4.1]]
[[Category:Enzymes of unknown structure]]
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