G-protein distribution in canine cardiac sarcoplasmic reticulum and sarcolemma: comparison to rabbit skeletal muscle membranes and to brain and erythrocyte G-proteins.
G-protein distribution in canine cardiac sarcoplasmic reticulum and sarcolemma: comparison to rabbit skeletal muscle membranes and to brain and erythrocyte G-proteins.
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犬心脏肌浆网和肌膜中的 G 蛋白分布:与兔骨骼肌膜以及脑和红细胞 G 蛋白的比较。
DOI:
10.1016/0003-9861(87)90509-1
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发表时间:
1987
影响因子:
3.9
通讯作者:
Birnbaumer,L
中科院分区:
文献类型:
--
作者:
Scherer,NM;Toro,MJ;Entman,ML;Birnbaumer,L
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 α subunits of G-proteins (Gαcommonantibody) or to a unique sequence of the α subunit of Go(Gαoantibody) indicated that the two lower molecular weight bands in cardiac SL are Goor 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.
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DOI:
--
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Codina,J;Hildebrandt,JD;Sekura,RD;Birnbaumer,M;Bryan,J;Manclark,CR;Iyengar,R;Birnbaumer,L
通讯作者:
Birnbaumer,L
影响因子:
4.8
作者:
Eva;Neer;Josephine;Lok;Lisa G. Wolf
通讯作者:
Lisa G. Wolf
影响因子:
2.9
作者:
Halvorsen,SW;Nathanson,NM
通讯作者:
Nathanson,NM
DOI:
10.1126/science.3006254
发表时间:
1986
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Smith,CD;Cox,CC;Snyderman,R
通讯作者:
Snyderman,R
DOI:
10.1016/s0021-9258(17)40801-5
发表时间:
1978
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
A. Caswell;S. Baker;H. Boyd;L. Potter;M. García
通讯作者:
M. García