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L-cysteate sulfo-lyase

class of enzymes

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionAug 26, 2023
Entity authorityQ6456125 ↗
Source-derived summary

The enzyme L-cysteate sulfo-lyase (EC 4.4.1.25) catalyzes the reaction

L-cysteate + H2O = hydrogensulfite + pyruvate + NH3 (overall reaction)

(1a) L-cysteate = hydrogensulfite + 2-aminoprop-2-enoate

(1b) 2-aminoprop-2-enoate = 2-iminopropanoate (spontaneous)

(1c) 2-iminopropanoate + H2O = pyruvate + NH3 (spontaneous)

This enzyme belongs to the family of lyases, 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

Denger K, Smits TH, Cook AM (2006). "L-Cysteate sulpho-lyase, a widespread pyridoxal 5′-phosphate-coupled desulphonative enzyme purified from Silicibacter pomeroyi DSS-3(T)". Biochem. J. 394 (Pt 3): 657–64. doi:10.1042/BJ20051311. PMC 1383715. PMID 16302849.

Editorial summary

This brief starts where responsible research should: with the source description of “L-cysteate sulfo-lyase” as class of enzymes. Everything that follows is an evidence route, not borrowed authority.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current lead gives the account dated anchors—2006, 1042—that can be checked directly. The selected authority fields contribute no independent date. The account is most persuasive where L-cysteate, sulfo-lyase and class can be independently traced.
Editorial analysis

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The subject matters to the general reference register because the source frames it as class of enzymes. Its deeper value depends on whether names, dates, institutions and citations support that framing.

Evidence profile

Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 26, 2023. The linked authority identifier is Q6456125. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2006 and 1042.

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Source & attribution

This entry incorporates text from “L-cysteate sulfo-lyase” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.