Linked Life Data

6235851

Source:http://linkedlifedata.com/resource/pubmed/id/6235851

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
15
pubmed:dateCreated
1984-10-12
pubmed:abstractText
The purified, soluble F1-ATPase was modified by several covalently reacting inhibitors, either known or considered to bind to the active site bearing beta-subunit, to cause partial inhibition up to 99%. The modified enzyme was then reconstituted in the presence of OSCP (oligomycin sensitivity conferring protein) with submitochondrial particles (SMP) almost completely (greater than 99%) denuded of active F1-ATPase and was assayed for oligomycin-sensitive ATPase and oxidative phosphorylation activities. The inhibitors used were 1-fluoro-2,4-dinitrobenzene (FDNB), N-(ethoxycarbonyl)-2-ethoxy-1,2-dihydroquinoline (EEDQ), 1-cyclohexyl-3-(2-morpholinoethyl)carbodiimide metho-p-toluenesulfonate (CMCD), quinacrine mustard (QM), 5-(dimethylamino)-naphthalene-1-sulfonyl chloride (dansyl-Cl), 5'-[p-(fluoro-sulfonyl)benzoyl]adenosine (FSBA), and N,N'-dicyclohexylcarbodiimide (DCCD). The SMP reconstituted with unmodified F1 exhibited oxidative phosphorylation and oligomycin-sensitive ATPase (in the presence of uncouplers) activities as high as 500 nmol min-1 mg-1 and 8 mumol min-1 mg-1, respectively. The systems reconstituted with F1 modified to cause various degrees of inhibition with FDNB, EEDQ, CMCD, QM, and dansyl-Cl exhibited the same degree of inhibition of oxidative phosphorylation and oligomycin-sensitive ATPase activities as the inhibition of the ATPase activity of the modified F1 before reconstitution. The systems reconstituted with FSBA-modified F1 showed the following relative degrees of inhibition: oxidative phosphorylation greater than oligomycin-sensitive ATPase of particles greater than ATPase of soluble F1. In contrast, the systems reconstituted with DCCD-modified F1 showed much greater inhibition of oligomycin-sensitive ATPase than of oxidative phosphorylation activity.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0006-2960
pubmed:author
pubmed:issnType
Print
pubmed:day
17
pubmed:volume
23
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3508-14
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Inhibitory chemical modifications of F1-ATPase: effects on the kinetics of adenosine 5'-triphosphate synthesis and hydrolysis in reconstituted systems.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.