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Literature summary for 4.4.1.13 extracted from

  • Giovanelli, J.
    Cystathionine beta-lyase from spinach (1987), Methods Enzymol., 143, 443-449.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
5,5'-dithiobis(2-nitrobenzoic acid)
-
Spinacia oleracea
Beta-cyanoalanine competitive; strong Spinacia oleracea
NEM
-
Spinacia oleracea
rhizobitoxine active-site directed, irreversible Spinacia oleracea

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.13
-
L-cystathionine
-
Spinacia oleracea
0.25
-
L-djenkolate
-
Spinacia oleracea

Organism

Organism UniProt Comment Textmining
Spinacia oleracea
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Spinacia oleracea

Source Tissue

Source Tissue Comment Organism Textmining
leaf
-
Spinacia oleracea
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.111
-
-
Spinacia oleracea

Storage Stability

Storage Stability Organism
-80°C or at 4°C, 5 days, 70% loss of activity, partially purified enzyme Spinacia oleracea

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
L-cystathionine + H2O no gamma-cleavage Spinacia oleracea L-homocysteine + NH3 + pyruvate
-
?
L-djenkolate + H2O
-
Spinacia oleracea pyruvate
-
?
mixed disulfide of L-cysteine and L-homocysteine + H2O
-
Spinacia oleracea ?
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8.8
-
-
Spinacia oleracea