Linked Life Data

2415172

Source:http://linkedlifedata.com/resource/pubmed/id/2415172

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
1986-1-21
pubmed:abstractText
Interaction of cytochrome c with electron carriers in intact and damaged (with destroyed outer membrane) rat liver mitochondria was studied. It was shown that the increase in ionic strength causes changes in the respiration rate of damaged mitochondria due to the reduction of the cytochrome c affinity for its binding sites in the organelles. This suggests that cytochrome c concentration in the intermembrane space of intact mitochondria is increased by salts, whereas the increase in ionic strength has a slight influence on the rates of succinate oxidase and external rotenone-insensitive NADH-oxidase of intact mitochondria. At low ionic strength values, the Michaelis constant (KM) value of external NADH-oxidase for cytochrome c exceeds by one order of magnitude that for succinate oxidase, while the maximal activity of these two systems is nearly the same. The increase in ionic strength causes an increase in the KM value for both oxidases. Interaction of cytochrome c with mitochondrial proteins was modelled by cytochrome c interaction with cibacron-dextran anions. It was concluded that the ionic strength-sensitive electrostatic interactions play a decisive role in cytochrome c binding to electron carriers in mitochondrial membranes. However, cytochrome c content and its binding parameters in intact-mitochondrial membranes prevent the latent activity of external NADH oxidase to be revealed in intact mitochondria after the increase in the ionic strength of the surrounding medium.
pubmed:language
rus
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0320-9725
pubmed:author
pubmed:issnType
Print
pubmed:volume
50
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1877-83
pubmed:dateRevised
2007-7-23
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
[Interaction of cytochrome c with mitochondrial proteins and cybacrone-dextran].
pubmed:publicationType
Journal Article, In Vitro, English Abstract