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Literature summary extracted from

  • Ndontsa, E.N.; Moore, R.L.; Goodwin, D.C.
    Stimulation of KatG catalase activity by peroxidatic electron donors (2012), Arch. Biochem. Biophys., 525, 215-222.
    View publication on PubMed

Cloned(Commentary)

EC Number Cloned (Comment) Organism
1.11.1.21 expression in Escherichia coli Mycobacterium tuberculosis

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
1.11.1.21 0.13
-
ascorbate pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 0.2
-
pyrogallol pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 0.49
-
o-Dianisidine pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 0.7
-
3,3',5,5'-tetramethylbenzidine pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 0.8
-
H2O2 no electron donor present, pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 0.83
-
2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 1.1
-
chlorpromazine pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 1.2
-
N,N,N',N'-tetramethyl-p-phenylenediamine pH 5.0, 23°C Mycobacterium tuberculosis

Organism

EC Number Organism UniProt Comment Textmining
1.11.1.21 Mycobacterium tuberculosis
-
-
-

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
1.11.1.21 2 H2O2
-
Mycobacterium tuberculosis O2 + 2 H2O
-
?
1.11.1.21 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) + H2O2
-
Mycobacterium tuberculosis ? + H2O
-
?
1.11.1.21 3,3',5,5'-tetramethylbenzidine + H2O2
-
Mycobacterium tuberculosis ? + H2O
-
?
1.11.1.21 ascorbate + H2O2
-
Mycobacterium tuberculosis monodehydroascorbate + H2O
-
?
1.11.1.21 chlorpromazine + H2O2
-
Mycobacterium tuberculosis ? + H2O
-
?
1.11.1.21 additional information presence of a low- and high-KM component for catalase activity at pH 5.0. Electron donors increase the apparent kcat for the low-KM component. During stimulated catalase activity, less than 0.008 equivalents of oxidized donor accumulate for every H2O2 consumed. A Fe(III)-O2 radical anion-like intermediate dominates during donor-stimulated catalatic turnover, and this intermediate converts directly to the ferric state upon depletion of H2O2 Mycobacterium tuberculosis ?
-
?
1.11.1.21 N,N,N',N'-tetramethyl-p-phenylenediamine + H2O2
-
Mycobacterium tuberculosis ? + H2O
-
?
1.11.1.21 o-dianisidine + H2O2
-
Mycobacterium tuberculosis ? + H2O
-
?
1.11.1.21 pyrogallol + H2O2
-
Mycobacterium tuberculosis ? + H2O
-
?

Synonyms

EC Number Synonyms Comment Organism
1.11.1.21 KatG
-
Mycobacterium tuberculosis

Turnover Number [1/s]

EC Number Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
1.11.1.21 520
-
ascorbate pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 570
-
H2O2 no electron donor present, pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 630
-
pyrogallol pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 3300
-
2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 5220
-
3,3',5,5'-tetramethylbenzidine pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 5600
-
o-Dianisidine pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 7012
-
N,N,N',N'-tetramethyl-p-phenylenediamine pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 7940
-
chlorpromazine pH 5.0, 23°C Mycobacterium tuberculosis

kcat/KM [mM/s]

EC Number kcat/KM Value [1/mMs-1] kcat/KM Value Maximum [1/mMs-1] Substrate Comment Organism Structure
1.11.1.21 710
-
H2O2 no electron donor present, pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 1200
-
o-Dianisidine pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 3200
-
pyrogallol pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 3900
-
ascorbate pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 4000
-
2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 6000
-
N,N,N',N'-tetramethyl-p-phenylenediamine pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 7200
-
chlorpromazine pH 5.0, 23°C Mycobacterium tuberculosis
1.11.1.21 7400
-
3,3',5,5'-tetramethylbenzidine pH 5.0, 23°C Mycobacterium tuberculosis