Linked Life Data

2931136

Source:http://linkedlifedata.com/resource/pubmed/id/2931136

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1985-11-12
pubmed:abstractText
The Ca2+-pumping ATPase of erythrocyte plasma membranes of hypertensive humans (HTN) show, in the absence of calmodulin, a low Vmax comparable to that of the enzyme of the erythrocyte membranes of normotensive humans (NTN). Although the addition of calmodulin (1.5 micrograms per ml) increased the maximum activity of the calcium pump of membranes of HTN and NTN individuals by at least 2-fold and 4-fold, respectively, the activator protein partially purified from the erythrocytes of HTN individuals enhanced the activity of the enzyme in a fashion similar to that of the protein obtained from the haemolysate of NTN individuals. A determination of the dependence of the activity of the pump on concentration of ATP revealed that the Km (ATP) of the enzyme of membranes of HTN individuals is 52% higher than that of the enzyme of membranes of NTN individuals, while the Vmax (1.75 +/- 0.28 mumol ATP mg protein-1 h-1) of the pump is 46% lower in the membranes of HTN humans than that of the enzyme of membranes of normal individuals (3.25 +/- 0.42 mumol ATP mg protein-1 h-1). It seems likely from these results that elevated erythrocyte Ca2+ concentration associated with essential hypertension may be due to a defective interaction between the Ca2+-pumping ATPase and the calmodulin Ca2+ complex.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0144-8463
pubmed:author
pubmed:issnType
Print
pubmed:volume
5
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
525-31
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Erythrocyte membrane Ca2+-pumping ATPase of hypertensive humans: reduced stimulation by calmodulin.
pubmed:publicationType
Journal Article, In Vitro