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1.7.2.2: nitrite reductase (cytochrome; ammonia-forming)

This is an abbreviated version!
For detailed information about nitrite reductase (cytochrome; ammonia-forming), go to the full flat file.

Word Map on EC 1.7.2.2

Reaction

NH3
+ 2 H2O + 6 ferricytochrome c =
nitrite
 + 6 ferrocytochrome c + 7 H+

Synonyms

ammonia-forming cytochrome c nitrite reductase, ccNiR, CcuHao, CfHao, CmHao, cNiR, cytochrome c NiR, cytochrome c nitrite reductase, cytochrome c nitrite reductase complex, cytochrome c-552, epsilonHao, epsilonproteobacterial hydroxylamine oxidoreductase, Glov_1042, haoA, hexaheme c-type cytochrome, More, multihaem c NiR, multiheme cytochrome c nitrite reductase, multiheme nitrite reductase, NiR, NiR cytochrome c552, nirB, NirC, nitrite reductase, NpHao, NrfA, NrfA2NrfH complex, NrfHA, octahaem cytochrome c nitrite reductase, SCO2486, SCO2488, TvNiR, WS0969

ECTree

     1 Oxidoreductases
         1.7 Acting on other nitrogenous compounds as donors
             1.7.2 With a cytochrome as acceptor
                1.7.2.2 nitrite reductase (cytochrome; ammonia-forming)

Temperature Stability

Temperature Stability on EC 1.7.2.2 - nitrite reductase (cytochrome; ammonia-forming)

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TEMPERATURE STABILITY
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
30
-
at an enzyme concentration of 2 mg/ml in potassium phosphate buffer pH 7.0 the enzyme is stable at 30°C for at least 24 h
50
-
incubation at 50°C results in 1.5fold increase of activity
50 - 70
Q5F2I3
at least 50 h, purified enzyme, stable
70
-
at 70°C the enzyme looses 50% of its activity in about 3 h
86
Q5F2I3
melting of the TvNiR molecule is an irreversible highly cooperative process with the transition temperature of 86°C and the transition enthalpy of about J/mol of hexamer