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Literature summary for 7.1.1.7 extracted from

  • Al-Attar, S.; Yu, Y.; Pinkse, M.; Hoeser, J.; Friedrich, T.; Bald, D.; De Vries, S.
    Cytochrome bd displays significant quinol peroxidase activity (2016), Sci. Rep., 6, 27631 .
    View publication on PubMedView publication on EuropePMC

Inhibitors

Inhibitors Comment Organism Structure
NO reversible inhibition Escherichia coli

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.072
-
decylubiquinol pH 7.0, temperature not specified in the publication Escherichia coli
6.6
-
H2O2[side 2] pH 7.0, temperature not specified in the publication Escherichia coli

Localization

Localization Comment Organism GeneOntology No. Textmining
membrane
-
Escherichia coli 16020
-

Organism

Organism UniProt Comment Textmining
Escherichia coli P0ABJ9 and P0ABK2 and P56100 P0ABJ9 i.e. subunit cydA, P0ABK2 i.e. subunit cydB, P56100 i.e. subunit cydX
-

Purification (Commentary)

Purification (Comment) Organism
preapration of highly pure and active enzyme Escherichia coli

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2 decylubiquinol + O2[side 2] + 4 H+[side 2]
-
Escherichia coli 2 decylubiquinone + 2 H2O[side 2] + 4 H+[side 1]
-
?
decylubiquinol + H2O2[side 2] + 2 H+[side 2]
-
Escherichia coli decylubiquinone + H2O[side 2] + 2 H+[side 1]
-
?

Turnover Number [1/s]

Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
101
-
H2O2[side 2] pH 7.0, temperature not specified in the publication Escherichia coli

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7
-
-
Escherichia coli

pH Range

pH Minimum pH Maximum Comment Organism
5.5
-
35% of the activity at pH 7.0, substrate H2O2 Escherichia coli

General Information

General Information Comment Organism
physiological function besides its oxidase activity, cytochrome bd is a genuine quinol peroxidase that reduces hydrogen peroxide to water. The enzyme does not display catalase activity Escherichia coli

kcat/KM [mM/s]

kcat/KM Value [1/mMs-1] kcat/KM Value Maximum [1/mMs-1] Substrate Comment Organism Structure
15
-
H2O2[side 2] pH 7.0, temperature not specified in the publication Escherichia coli