Linked Life Data

2991350

Source:http://linkedlifedata.com/resource/pubmed/id/2991350

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1985-9-4
pubmed:abstractText
The distribution of cyclic cAMP-dependent protein kinase in subcellular fractions of rat parotid was determined by two independent biochemical methods, measurement of kinase catalytic activity or by quantitation of the catalytic and regulatory subunits in an enzyme-linked immunosorbent assay using monospecific antibodies. The major amount (85%) of the catalytic activity was found associated with the 100,000 g soluble fraction, whereas only 1/3 of the total catalytic subunit was demonstrated in the soluble fraction by the immunoassay. The immunoassay results furthermore indicated that approximately 50% of the total cellular protein kinase was associated with the extranuclear particulate fraction and that the predominant form of the kinase in the particulate fractions was the type II isoenzyme. The reasons for the differences in the distribution of the protein kinase demonstrated by the two methods were examined. Incomplete extraction of membrane-bound protein kinase and the influence of membrane localized ATPases on activity measurements were, at least in part, responsible for the low percentage of kinase activity measured in the particulate fractions. These results emphasize that the precise quantitation of protein kinase subunits merits investigation by more than one method. For the parotid, the finding that approximately 2/3 of the total catalytic subunit may be particulate associated provides additional evidence that cyclic AMP could be involved in membrane mechanisms of hormone-regulated secretion.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0746-3898
pubmed:author
pubmed:issnType
Print
pubmed:volume
10
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
247-58
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Determination of cyclic AMP-dependent protein kinase subunits by an immunoassay reveals a different subcellular distribution of the enzyme in rat parotid than does determination of the enzyme activity.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't