L-cysteate sulfo-lyase EC#: 4.4.1.25; ChemWhat Code: 1382942
| Product Name | L-cysteate sulfo-lyase |
| Example Structure |  |
| Synonyms | (S)-cysteate sulfo-lyase, CuyA, cysteate sulfo-lyase, L-cysteate sulpho-lyase (deaminating) |
| EC Number | 4.4.1.25 |
| CAS Registry Number | |
| Comments | A pyridoxal-phosphate protein. The enzyme cleaves a carbon-sulfur bond, releasing bisulfite and an unstable enamine product that tautomerizes to an imine form, which undergoes a hydrolytic deamination to form pyruvate and ammonia. The latter reaction, which can occur spontaneously, can also be catalysed by EC?3.5.99.10, 2-iminobutanoate/2-iminopropanoate deaminase.?D-Cysteine can also act as a substrate, but more slowly. It is converted into pyruvate, sulfide and ammonia. This inducible enzyme from the marine bacterium?Silicibacter pomeroyi?DSS-3 forms part of the cysteate-degradation pathway. |
| Cofactor | pyridoxal 5′-phosphate |
| History | |
| Reactions | L-cysteate + H(2)O = hydrogensulfite + pyruvate + NH(3). |
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