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Literature summary for 4.4.1.4 extracted from

  • Schwimmer, S.
    S-Alkyl-L-cysteine sulfoxide lyase [Allium cepa (onion)] (1971), Methods Enzymol., 17B, 475-478.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
hydrazine
-
Allium cepa
hydroxylamine
-
Allium cepa
S-alkyl derivatives of L-Cys competitive Allium cepa

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
trans-(+)-S-propenyl-L-Cys sulfoxide Allium cepa
-
?
-
?

Organism

Organism UniProt Comment Textmining
Allium cepa
-
-
-

Storage Stability

Storage Stability Organism
13°C, lyophilized preparations retains activity for more than 2 years Allium cepa

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
S-allyl-L-cysteine sulfoxide + H2O
-
Allium cepa 2-propene-thioic acid + pyruvate + NH4+ + H+
-
?
S-propyl-L-Cys
-
Allium cepa ?
-
?
trans-(+)-S-propenyl-L-Cys sulfoxide
-
Allium cepa ?
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.4
-
potassium phosphate buffer Allium cepa
8.1
-
Tris-HCl buffer Allium cepa
8.6
-
sodium diphosphate buffer Allium cepa

pH Stability

pH Stability pH Stability Maximum Comment Organism
4.5
-
very unstable below pH 4.5 Allium cepa

Cofactor

Cofactor Comment Organism Structure
pyridoxal 5'-phosphate stimulates Allium cepa