Linked Life Data

2843227

Source:http://linkedlifedata.com/resource/pubmed/id/2843227

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1988-10-21
pubmed:abstractText
Complex II of the anaerobic respiratory chain in Ascaris muscle mitochondria showed a high fumarate reductase activity when reduced methyl viologen was used as the electron donor. The maximum activity was 49 mumol/min per mg protein, which is much higher than that of the mammalian counterpart. The mitochondria of Ascaris-fertilized eggs, which require oxygen for its development, also showed fumarate reductase activity with a specific activity intermediate between those of adult Ascaris and mammals. Antibody against the Ascaris flavoprotein subunit reacted with the mammalian counterparts, whereas those against the Ascaris iron-sulfur protein subunit did not crossreact, although the amino acid compositions of the subunits in Ascaris and bovine heart were quite similar. Cytochrome b-558 of Ascaris complex II was separated from flavoprotein and iron-sulphur protein subunits by high performance liquid chromatography with a gel permeation system in the presence of Sarkosyl. Isolated cytochrome b-558 is composed of two hydrophobic polypeptides with molecular masses of 17.2 and 12.5 kDa determined by gradient gel, which correspond to the two small subunits of complex II. Amino acid compositions of these small subunits showed little similarity with those of cytochrome b-560 of bovine heart complex II. NADH-fumarate reductase, which is the final enzyme complex in the anaerobic respiratory chain in Ascaris, was reconstituted with bovine heart complex I, Ascaris complex II and phospholipids. The maximum activity was 430 nmol/min per mg protein of complex II. Rhodoquinone was essential for this reconstitution, whereas ubiquinone showed no effect. The results clearly indicate the unique role of Ascaris complex II as fumarate reductase and the indispensability of rhodoquinone as the low-potential electron carrier in the NADH-fumarate reductase system.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
14
pubmed:volume
935
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
130-40
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:2843227-Amino Acid Sequence, pubmed-meshheading:2843227-Animals, pubmed-meshheading:2843227-Ascaris, pubmed-meshheading:2843227-Cytochrome b Group, pubmed-meshheading:2843227-Electron Spin Resonance Spectroscopy, pubmed-meshheading:2843227-Electron Transport, pubmed-meshheading:2843227-Electron Transport Complex II, pubmed-meshheading:2843227-Electrophoresis, Polyacrylamide Gel, pubmed-meshheading:2843227-Escherichia coli, pubmed-meshheading:2843227-Hydrogen-Ion Concentration, pubmed-meshheading:2843227-Kinetics, pubmed-meshheading:2843227-Mitochondria, pubmed-meshheading:2843227-Molecular Sequence Data, pubmed-meshheading:2843227-Molecular Weight, pubmed-meshheading:2843227-Multienzyme Complexes, pubmed-meshheading:2843227-Muscles, pubmed-meshheading:2843227-NAD, pubmed-meshheading:2843227-NADPH Oxidase, pubmed-meshheading:2843227-Ovum, pubmed-meshheading:2843227-Oxidoreductases, pubmed-meshheading:2843227-Oxygen, pubmed-meshheading:2843227-Succinate Dehydrogenase, pubmed-meshheading:2843227-Ubiquinone
pubmed:year
1988
pubmed:articleTitle
Electron-transfer complexes of Ascaris suum muscle mitochondria. III. Composition and fumarate reductase activity of complex II.
pubmed:affiliation
Department of Parasitology, Juntendo University, School of Medicine, Tokyo, Japan.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't