Linked Life Data

3122662

Source:http://linkedlifedata.com/resource/pubmed/id/3122662

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1988-2-8
pubmed:abstractText
Herein we describe the distribution of G-proteins in canine cardiac sarcolemma (SL) and sarcoplasmic reticulum (SR) and in rabbit skeletal muscle SL, T-tubules, and junctional and longitudinal SR in comparison to G-proteins of human erythrocyte and bovine brain. G-proteins were unequivocally present in cardiac SL and SR and in skeletal T-tubules. Both cardiac fractions had two substrates specifically ADP-ribosylated by cholera toxin migrating on a sodium dodecyl sulfate-polyacrylamide gel at about 42 and 45 kDa. In skeletal muscle membranes, cholera toxi-labeled substrates migrated at about 42 and 62 kDa. Three substrates for pertussis toxin were resolved by sodium dodecyl sulfate/urea-polyacrylamide gel electrophoresis in cardiac SL at about 38, 40, and 43 kDa. Only the two higher molecular weight substrates were detected in cardiac SR and in any of several skeletal muscle membrane fractions. Comparison of G-proteins in muscle membrane fractions with G-proteins isolated from bovine brain and human erythrocyte as well as their reaction with antisera to either a common sequence of alpha subunits of G-proteins (G alpha common antibody) or to a unique sequence of the alpha subunit of Go (G alpha o antibody) indicated that the two lower molecular weight bands in cardiac SL are Go or Go-like, and therefore the upper band is probably Gi. These data demonstrate that pertussis toxin substrates are more heterogeneous than previously described and have implications for studies attempting to attribute physiological functions to G-protein isolates.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0003-9861
pubmed:author
pubmed:issnType
Print
pubmed:volume
259
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
431-40
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
G-protein distribution in canine cardiac sarcoplasmic reticulum and sarcolemma: comparison to rabbit skeletal muscle membranes and to brain and erythrocyte G-proteins.
pubmed:affiliation
Department of Cell Biology, Baylor College of Medicine, Houston, Texas 77030.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't