Linked Life Data

6304086

Source:http://linkedlifedata.com/resource/pubmed/id/6304086

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1983-7-8
pubmed:abstractText
EPR spectra of nitric oxide complexes of cytochrome c oxidase were studied as a function of temperature in the fully reduced form and in a mixed valence form. In the 12-77 K range, temperature-dependent motion changed the EPR spectral line shape of the mixed valence form but not the fully reduced form. Two separate hypotheses which both indicate cytochrome a-cytochrome a3 interaction could account for this phenomenon: i.e. either, in response to redox changes at cytochrome a, a changed ligand binding environment occurs at cytochrome a3 which has conformations that down to 40 K can interconvert on a 10(8) s-1 time scale, or dipolar spin-spin interaction occurs between the NO-liganded a3 center and a paramagnetic metal center in cytochrome a. This interaction is then modulated by the temperature-dependent spin-lattice relaxation behavior of the center in cytochrome a. If this latter hypothesis is correct, the intercenter distance can be estimated at 15 A, and the more likely interacting center can be predicted to be the heme moiety of cytochrome a.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
10
pubmed:volume
258
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5348-51
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1983
pubmed:articleTitle
Interaction in cytochrome c oxidase between cytochrome a3 ligated with nitric oxide and cytochrome a.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.