Any feedback?
Please rate this page
(literature.php)
(0/150)

BRENDA support

Literature summary for 1.7.2.1 extracted from

  • Lam, Y.; Nicholas, D.J.D.
    A nitrite reductase with cytochrome oxidase activity from Micrococcus denitrificans (1969), Biochim. Biophys. Acta, 180, 459-472.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
KCN 1 mM, 72% inhibition Paracoccus denitrificans
additional information relatively ineffective at 1 mM: CO, bathocuproine, diethyl dithiocarbamate, o-phenanthroline and alpha,alpha'-dipyridyl Paracoccus denitrificans
NaN3 1 mM, 60% inhibition Paracoccus denitrificans
NH2OH 1 mM, 50% inhibition Paracoccus denitrificans

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.027
-
O2 cytochrome c oxidase activity Paracoccus denitrificans
0.046
-
ferricytochrome c
-
Paracoccus denitrificans
0.046
-
NO2- reduced cytochrome c as electron donor Paracoccus denitrificans

Metals/Ions

Metals/Ions Comment Organism Structure
copper copper protein Paracoccus denitrificans
copper 5.5 ng/mg protein Paracoccus denitrificans

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
130000
-
gel filtration Paracoccus denitrificans

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
NO2- + ferrocytochrome c Paracoccus denitrificans role in respiration NO + ferricytochrome c
-
?

Organism

Organism UniProt Comment Textmining
Paracoccus denitrificans
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Paracoccus denitrificans

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
1.27
-
-
Paracoccus denitrificans

Storage Stability

Storage Stability Organism
-15°C, 4 weeks Paracoccus denitrificans

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
ferrocytochrome c + O2
-
Paracoccus denitrificans ferricytochrome c + H2O
-
?
nitric oxide + H2O + ferricytochrome c
-
Paracoccus denitrificans nitrite + ferrocytochrome c + H+
-
r
nitrite + ferrocytochrome c artificial electron donors: reduced methyl viologen, phenazine methosulfate and to a lesser extend hydroquinone, highly purified enzyme has cytochrome c oxidase activity Paracoccus denitrificans nitric oxide + H2O + ferricytochrome c
-
?
nitrite + ferrocytochrome c artificial electron donor: reduced benzyl viologen Paracoccus denitrificans nitric oxide + H2O + ferricytochrome c
-
?
NO2- + ferrocytochrome c role in respiration Paracoccus denitrificans NO + ferricytochrome c
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
30
-
-
Paracoccus denitrificans

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6.5 7 cytochrome c oxidase activity Paracoccus denitrificans
6.7
-
-
Paracoccus denitrificans

Cofactor

Cofactor Comment Organism Structure
cytochrome contains cytochrome, probably of the c and a2 types Paracoccus denitrificans