Document Detail

Hydroquinone peroxidase activity of maize root mitochondria.
MedLine Citation:
PMID:  17922264     Owner:  NLM     Status:  MEDLINE    
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.
Vesna Hadzi-Tasković Sukalović; B Kukavica; M Vuletić
Related Documents :
3780934 - Tritrichomonas foetus: ultrastructure and cytochemistry of endocytosis.
18965084 - Studies on catalytic fluorescence formation with peroxidase-like metallotetrakis(n-meth...
10824584 - Participation of the photosensitizer alpha-terthienyl in the peroxidase-catalyzed oxida...
21671134 - Novel mitochondria-targeted antioxidants: plastoquinone conjugated with cationic plant ...
23862514 - Hierarchical zeolite beta: an efficient and eco-friendly nanocatalyst for the friedel-c...
22754314 - A practical chemo-enzymatic approach to highly enantio-enriched 10-ethyl-7,8-dihydro-γ...
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    
Laboratory of Plant Physiology, Maize Research Institute Zemun Polje, Belgrade.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Hydrogen Peroxide / metabolism
Hydroquinones / metabolism*
Mitochondria / enzymology*
NADH, NADPH Oxidoreductases / metabolism
Peroxidase / metabolism*
Plant Roots / enzymology*
Reactive Oxygen Species / metabolism
Zea mays / enzymology*
Reg. No./Substance:
0/Hydroquinones; 0/Reactive Oxygen Species; 123-31-9/hydroquinone; 7722-84-1/Hydrogen Peroxide; EC; EC 1.6.-/NADH, NADPH Oxidoreductases

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

Previous Document:  Close association of centrosomes to the distal ends of the microbody during its growth, division and...
Next Document:  Possible roles of actin and myosin during anaphase chromosome movements in locust spermatocytes.