Inactivation of Ascorbate Peroxidase by Thiols Requires Hydrogen Peroxide

1992 ◽  
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbate Peroxidase

scholarly journals Kinetic study of the inactivation of ascorbate peroxidase by hydrogen peroxide

2000 ◽  
Vol 348 (2) ◽  
pp. 321 ◽  
Author(s):  
Alexander N.P. HINER ◽  
José Neptuno RODRÍGUEZ-LÓPEZ ◽  
Marino B. ARNAO ◽  
Emma LLOYD RAVEN ◽  
Francisco GARCÍA-CÁNOVAS ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Kinetic Study ◽  
Ascorbate Peroxidase

Inactivation of ascorbate peroxidase and horseradish peroxidases A2 and C by hydrogen peroxide

2001 ◽  
Vol 29 (1) ◽  
pp. A36-A36
Author(s):  
A. N. P. Hiner ◽  
J. Hernández Ruíz ◽  
M. B. Arnao ◽  
F. García Cánovas ◽  
M. Acosta
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbate Peroxidase

scholarly journals Affinity of class I and class III peroxidases for H2O2 in pepper leaves of different maturity

2021 ◽  
pp. 73-85
Author(s):  
Tanja Trifković ◽  
Dino Hasanagić ◽  
Biljana Kukavica
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbate Peroxidase ◽  
Class I ◽  
Total Phenols ◽  
Class Iii ◽  
Enzymes Activities ◽  
Leaf Maturity ◽  
Opposite Trend ◽  
Pepper Leaves ◽  
Class Iii Peroxidases

Paper deals with activities of Class III peroxidases (POX, EC 1.11.1.7) and Class I peroxidases (ascorbate peroxidase, APX, EC 1.11.1.11) as well as the Km of these enzymes for hydrogen peroxide (H2O2) in the pepper leaves of different maturity. The obtained results suggest that the youngest pepper leaves compared to more mature ones have different strategies for H2O2 removal. There was an increase in APX activity with leaf maturity, while POX activity had the opposite trend, and its lowest activity was observed in the oldest leaves. The accumulation of reducing substrates i.e., ascorbate and total phenols was in positive correlation with corresponding enzymes following leaf maturity. The comparison of POX and APX affinity for H2O2 in pepper leaves of different maturity and their relationship between these enzymes' activities were showed.

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