Linked Life Data

8399146

Source:http://linkedlifedata.com/resource/pubmed/id/8399146

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
38
pubmed:dateCreated
1993-11-2
pubmed:abstractText
The regulation by the proton gradient of the electron flow from water to ferricyanide was investigated in thylakoids extracted from lettuce leaves. When the transmembrane proton current was varied by an uncoupler or by the ATP synthase activity, a unique relationship was found between the rate of ferricyanide reduction and the proton gradient, restricted here to its delta pH component. This behavior was conserved in CF1-depleted thylakoids where the passive proton flow was varied by the concentration of an Fo inhibitor or by the concentration of an uncoupler after 100% inhibition of Fo. This shows that under our experimental conditions no direct proton transfer exists in steady state between the site of regulation of the redox chain and the ATPase. Studies at two different pH's indicate that the internal pH, and not the transmembrane pH difference, controls the electron transfer between PS2 and PS1. Modeling the data suggests that a single deprotonation step is kinetically limiting.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0006-2960
pubmed:author
pubmed:issnType
Print
pubmed:day
28
pubmed:volume
32
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
10193-200
pubmed:dateRevised
2001-11-2
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Flow-force relationships in lettuce thylakoids. 1. Strict control of electron flow by internal pH.
pubmed:affiliation
CNRS, Gif-sur-Yvette, France.
pubmed:publicationType
Journal Article