Linked Life Data

9428639

Source:http://linkedlifedata.com/resource/pubmed/id/9428639

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2-3
pubmed:dateCreated
1998-1-27
pubmed:abstractText
7-Chloro-4-nitrobenzo-2-oxa-1,3-diazole (NBD-Cl) labeled Na+/K+-ATPase covalently with two different inactivation constants (Ki = 2.5 microM; Ki' = 10 microM). It apparently modified the two different ATP-binding sites of the enzyme since it decreased the activity of the E2ATP site, i.e. the K+-activated para-nitrophenylphosphatase activity, in an enzyme whose high-affinity E1ATP site had been blocked by fluorescein 5'isothiocyanate (FITC). It also reduced the activity of the E1ATP site, i.e. the Na+-activated protein phosphorylation, in an enzyme whose low-affinity E2ATP site had been blocked by Co(NH3)4PO4. Fluorescence quenching experiments with KI, CsCl and MnCl2 of the NBD-Cl-labeled Na+/K+-ATPase revealed two differently accessible types of fluorophores depending on the ATP site: The E2ATP site apparently differs from the E1ATP site in that it is more open because the fluorophore labeling in the E2ATP site was sterically better accessible for quenchers.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0014-5793
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
419
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
227-30
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Quenching of 7-chloro-4-nitrobenzo-2-oxa-1,3-diazole-modified Na+/K+-ATPase reveals a higher accessibility of the low-affinity ATP-binding site.
pubmed:affiliation
Institute of Physiology, Academy of Sciences of the Czech Republic, Prague.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't