Document Detail


Hydroquinone peroxidase activity of maize root mitochondria.
MedLine Citation:
PMID:  17922264     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The oxidation of hydroquinone with H(2)O(2) in the presence of mitochondria isolated from maize (Zea mays L.) roots was studied. The results indicate that a reduced form of quinone may be a substrate of mitochondrial peroxidases. Specific activities in different mitochondrial isolates, the apparent K (m) for hydrogen peroxide and hydroquinone, and the influence of some known peroxidase inhibitors or effectors are presented. Zymographic assays revealed that all mitochondrial peroxidases, which were stained with 4-chloro-1-naphthol, were capable of oxidizing hydroquinone. A possible antioxidative role of hydroquinone peroxidase in H(2)O(2) scavenging within the mitochondria, in cooperation with ascorbate or coupled with mitochondrial NAD(P)H dehydrogenases, is proposed.
Authors:
Vesna Hadzi-Tasković Sukalović; B Kukavica; M Vuletić
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-10-10
Journal Detail:
Title:  Protoplasma     Volume:  231     ISSN:  0033-183X     ISO Abbreviation:  Protoplasma     Publication Date:  2007  
Date Detail:
Created Date:  2007-10-08     Completed Date:  2008-01-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9806853     Medline TA:  Protoplasma     Country:  Austria    
Other Details:
Languages:  eng     Pagination:  137-44     Citation Subset:  IM    
Affiliation:
Laboratory of Plant Physiology, Maize Research Institute Zemun Polje, Belgrade.
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MeSH Terms
Descriptor/Qualifier:
Hydrogen Peroxide / metabolism
Hydroquinones / metabolism*
Mitochondria / enzymology*
NADH, NADPH Oxidoreductases / metabolism
Oxidation-Reduction
Peroxidase / metabolism*
Plant Roots / enzymology*
Reactive Oxygen Species / metabolism
Zea mays / enzymology*
Chemical
Reg. No./Substance:
0/Hydroquinones; 0/Reactive Oxygen Species; 123-31-9/hydroquinone; 7722-84-1/Hydrogen Peroxide; EC 1.11.1.7/Peroxidase; EC 1.6.-/NADH, NADPH Oxidoreductases

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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