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Literature summary for 4.4.1.15 extracted from

  • Schmidt, A.; Erdle, I.
    A cysteine desulfhydrase specific for D-cysteine from the green alga Chlorella fusca (1983), Z. Naturforsch. C, 38 c, 428-435.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
Fe2+
-
[Chlorella] fusca
Ni2+
-
[Chlorella] fusca
Zn2+
-
[Chlorella] fusca

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.16
-
D-cysteine 37°C, pH 9.0 [Chlorella] fusca

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
D-cysteine + H2O [Chlorella] fusca
-
sulfide + NH3 + pyruvate additional product suggested ?
D-cysteine + H2O [Chlorella] fusca
-
sulfide + NH3 + pyruvate more sulfide than pyruvate and ammonium formed ?

Organism

Organism UniProt Comment Textmining
[Chlorella] fusca
-
green alga, strain 211-8b, formerly Chlorella pyrenoidosa strain 211-8b
-

Purification (Commentary)

Purification (Comment) Organism
-
[Chlorella] fusca

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.21
-
purified enzyme, 37°C, pH 9.0 [Chlorella] fusca

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
D-cysteine + H2O
-
[Chlorella] fusca sulfide + NH3 + pyruvate additional product suggested ?
D-cysteine + H2O
-
[Chlorella] fusca sulfide + NH3 + pyruvate more sulfide than pyruvate and ammonium formed ?
D-cysteine + H2O very specific, only traces of activity with mercaptoacetic acid, mercaptoethanol, D-cystine, L-cystine, cysteamine, L-cysteine methylester [Chlorella] fusca sulfide + NH3 + pyruvate additional product suggested ?
D-cysteine + H2O very specific, only traces of activity with mercaptoacetic acid, mercaptoethanol, D-cystine, L-cystine, cysteamine, L-cysteine methylester [Chlorella] fusca sulfide + NH3 + pyruvate more sulfide than pyruvate and ammonium formed ?
additional information L-cysteine is not utilized [Chlorella] fusca ?
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8.5 9
-
[Chlorella] fusca

pH Range

pH Minimum pH Maximum Comment Organism
7 11
-
[Chlorella] fusca