Down-regulation of G-protein-mediated Ca2+ sensitization in smooth muscle.
Down-regulation of G-protein-mediated Ca2+ sensitization in smooth muscle.
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平滑肌中 G 蛋白介导的 Ca2 敏化下调。
DOI:
10.1091/mbc.8.2.279
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发表时间:
1997
影响因子:
3.3
通讯作者:
Somlyo,AP
中科院分区:
文献类型:
--
作者:
Gong,MC;Fujihara,H;Walker,LA;Somlyo,AV;Somlyo,AP
Prolonged treatment with guanosine 5'-[gamma-thio]triphosphate (GTP gamma S; 5-16 h, 50 microM) of smooth muscle permeabilized with Staphylococcus aureus alpha-toxin down-regulated (abolished) the acute Ca2+ sensitization of force by GTP gamma S, AIF-4, phenylephrine, and endothelin, but not the response to phorbol dibutyrate or a phosphatase inhibitor, tautomycin. Down-regulation also abolished the GTP gamma S-induced increase in myosin light chain phosphorylation at constant [Ca2+] and was associated with extensive translocation of p21rhoA to the particulate fraction, prevented its immunoprecipitation, and inhibited its ADP ribosylation without affecting the immunodetectable content of G-proteins (p21rhoA, p21ras, G alpha q/11, G alpha i3, and G beta) or protein kinase C (types alpha, beta 1, beta 2, delta, epsilon, eta, theta, and zeta). We conclude that the loss of GTP gamma S- and agonist-induced Ca2+ sensitization through prolonged treatment with GTP gamma S is not due to a decrease in the total content of either trimeric (G alpha q/11, G alpha i3, and G beta) or monomeric (p21rhoA and p21ras) G-protein or protein kinase C but may be related to a structural change of p21rhoA and/or to down-regulation of its (yet to be identified) effector.
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DOI:
10.1016/s0021-9258(18)42092-3
发表时间:
1992-07
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
M. Gong;P. Cohen;Toshio Kitazawa;M. Ikebe;M. Masuo;A. Somlyo;A. Somlyo
通讯作者:
M. Gong;P. Cohen;Toshio Kitazawa;M. Ikebe;M. Masuo;A. Somlyo;A. Somlyo
DOI:
10.1042/bj3180469
发表时间:
1996
期刊:
The Biochemical journal
影响因子:
--
作者:
Jensen,PE;Gong,MC;Somlyo,AV;Somlyo,AP
通讯作者:
Somlyo,AP
影响因子:
3.9
作者:
G. Milligan;A. Wise;D. MacEwan;M. Grassie;F. R. Kennedy;T. Lee;E. J. Adie;G. D. Kim;J. McCALLUM;A. Burt
通讯作者:
A. Burt
DOI:
--
发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Kitazawa,T;Kobayashi,S;Horiuti,K;Somlyo,AV;Somlyo,AP
通讯作者:
Somlyo,AP
影响因子:
2.1
作者:
Michael P. Walsh;J. E. Andrea;Bruce G. Allen;O. Clément‐Chomienne;Elizabeth M. Collins;Kathleen G. Morgan
通讯作者:
Kathleen G. Morgan