The Regulation of Plant Peroxidases by Calcium

1986 ◽  
pp. 365-366 ◽  
Author(s):  
Claude Penel ◽  
Federico J. Castillo ◽  
Stefanie Kiefer ◽  
Hubert Greppin
Keyword(s):  
Plant Peroxidases

Peroxidases from Tulip Bulbs (Tulipa fosteriana, L.) Oxidize Xenobiotics NNitrosodimethylamine and N-Nitroso-N-methylaniline in vitro

1997 ◽  
Vol 62 (11) ◽  
pp. 1804-1814 ◽  
Author(s):  
Marie Stiborová ◽  
Hana Hansíková
Keyword(s):  
Cytochromes P450 ◽  
Kinetic Studies ◽  
The Other ◽  
Maximal Velocity ◽  
Michaelis Constant ◽  
Other Hand ◽  
Plant Peroxidases ◽  
Tulip Bulbs

Tulip bulbs (Tulipa fosteriana, L.) contain peroxidases catalyzing the oxidation of the xenobiotics N-nitrosodimethylamine (NDMA) and N-nitroso-N-methylaniline (NMA). Three anionic (A1, A2, A3) and four cationic (B, C, D, E) peroxidases were purified from this tissue, partially characterized and used for kinetic studies. Demethylation of NDMA and NMA producing formaldehyde is catalyzed by one anionic (A1) and three cationic (C, D, E) peroxidases. The oxidation of NDMA by tulip peroxidases exhibits the Michaelis-Menten kinetics. The apparent Michaelis constant and the maximal velocity values for this substrate were determined. On the other hand, non-Michaelian kinetics for the NMA oxidation were observed with tulip peroxidases. The most abundant cationic peroxidase (peroxidase C) was used for detailed enzymatic studies. In addition to formation of formaldehyde, methylaniline, aniline, 4-aminophenol and phenol were found to be metabolites formed from NMA. Phenol was formed presumably by N-demethylation via a benzenediazonium ion, while methylaniline, aniline and 4-aminophenol were products of denitrosation of the substrate. The efficiencies of plant peroxidases to oxidize NDMA and NMA in vitro are compared with those of cytochromes P450 and discussed.

Molecular and physiological aspects of plant peroxidases

1990 ◽  
Vol 8 (4) ◽  
pp. 313-314 ◽  
Author(s):  
Søren K. Rasmussen
Keyword(s):  
Plant Peroxidases

Homology of plant peroxidases: Relationships among acidic isoenzymes

1984 ◽  
Vol 60 (3) ◽  
pp. 294-298 ◽  
Author(s):  
Samuel K. Clark ◽  
James M. Conroy
Keyword(s):  
Plant Peroxidases

scholarly journals Apoplastic calcium executes a shut-down function on plant peroxidases

2012 ◽  
Vol 7 (6) ◽  
pp. 678-681 ◽  
Author(s):  
Christoph Plieth
Keyword(s):  
Plant Peroxidases

Signaling via Plant Peroxidases

2009 ◽  
pp. 155-171 ◽  
Author(s):  
Claude Penel* ◽  
Christophe Dun
Keyword(s):  
Plant Peroxidases

Molecular and physiological aspects of plant Peroxidases

1987 ◽  
Vol 26 (5) ◽  
pp. 1554
Author(s):  
Jeffrey B. Harborne
Keyword(s):  
Plant Peroxidases
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