Linked Life Data

1653025

Source:http://linkedlifedata.com/resource/pubmed/id/1653025

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1991-10-9
pubmed:abstractText
Two main forms of protein kinase C (PKC) activity were found in rat hepatocytes using DEAE-cellulose chromatography: PKC 1 and PKC 2. Treatment of cells with 1 microM 12-O-tetradecanoylphorbol 13-acetate (TPA) for 15 min caused a marked loss of PKC 1 activity and only a small loss of PKC 2 activity. Hydroxyapatite column chromatography resolved PKC 1 into three distinct peaks 1a, 1b and 1c, and PKC 2 into four peaks 2a, 2b, 2c and 2d. Immunoblot analysis with isozyme-specific monoclonal antibodies identified peak 1a as PKC-beta and peak 1b as PKC-alpha; the other peaks of activity were not identified. Treatment with TPA provoked a loss of activity of peaks 1b (PKC-alpha) and 1c, whereas peak 1a (PKC-beta) activity was not affected. The peaks of activity corresponding to PCK 2 did not show any major change due to TPA treatment except peak 2d that decreased. The apparent disappearance of PKC histone-kinase activity induced by TPA was also observed using other substrates (protamine or vinculin). The TPA-induced decrease in activity occurs in a time-dependent and dose-dependent fashion. However, the time-courses, the extent of depletion and the potency order of phorbol esters in induction of an activity decrease in the two groups of isoforms exhibited substantial differences.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
13
pubmed:volume
1094
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
77-84
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Differences in phorbol ester-induced decrease of the activity of protein kinase C isozymes in rat hepatocytes.
pubmed:affiliation
Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, D.F.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't