| Hydroquinone peroxidase activity of maize root mitochondria. | |
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MedLine Citation:
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PMID: 17922264 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Vesna Hadzi-Tasković Sukalović; B Kukavica; M Vuletić |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-10-10 |
Journal Detail:
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Title: Protoplasma Volume: 231 ISSN: 0033-183X ISO Abbreviation: Protoplasma Publication Date: 2007 |
Date Detail:
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Created Date: 2007-10-08 Completed Date: 2008-01-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9806853 Medline TA: Protoplasma Country: Austria |
Other Details:
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Languages: eng Pagination: 137-44 Citation Subset: IM |
Affiliation:
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Laboratory of Plant Physiology, Maize Research Institute Zemun Polje, Belgrade. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Hydrogen Peroxide
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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:
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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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