Reciprocal regulation of Gsα by palmitate and the βγ subunit
Reciprocal regulation of Gsα by palmitate and the βγ subunit
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棕榈酸酯和 βγ 亚基对 Gsα 的相互调节
DOI:
--
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发表时间:
1996
期刊:
影响因子:
--
通讯作者:
H. Bourne
中科院分区:
文献类型:
--
作者:
T. Iiri;P. Backlund;T. L. Jones;P. Wedegaertner;H. Bourne
Hormonal activation of G s , the stimulatory regulator of
adenylyl cyclase, promotes dissociation of α s from
Gβγ, accelerates removal of covalently attached palmitate from the
Gα subunit, and triggers release of a fraction of α s from the plasma membrane into the cytosol. To elucidate relations among
these three events, we assessed biochemical effects in
vitro of attached palmitate on recombinant α s prepared from Sf9 cells. In comparison to the unpalmitoylated protein
(obtained from cytosol of Sf9 cells, treated with a palmitoyl esterase,
or expressed as a mutant protein lacking the site for palmitoylation),
palmitoylated α s (from Sf9 membranes, 50% palmitoylated)
was more hydrophobic, as indicated by partitioning into TX-114, and
bound βγ with 5-fold higher affinity. βγ protected GDP-bound
α s , but not α s · GTP[γS], from
depalmitoylation by a recombinant esterase. We conclude that βγ
binding and palmitoylation reciprocally potentiate each other in
promoting membrane attachment of α s and that dissociation
of α s ·GTP from βγ is likely to mediate
receptor-induced α s depalmitoylation and translocation of
the protein to cytosol in intact cells.
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DOI:
10.1073/pnas.86.20.7900
发表时间:
1989
影响因子:
11.1
作者:
Ransnäs,LA;Svoboda,P;Jasper,JR;Insel,PA
通讯作者:
Insel,PA
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Hallak,H;Brass,LF;Manning,DR
通讯作者:
Manning,DR
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Wedegaertner,PB;Chu,DH;Wilson,PT;Levis,MJ;Bourne,HR
通讯作者:
Bourne,HR
影响因子:
3.3
作者:
Wedegaertner,PB;Bourne,HR;vonZastrow,M
通讯作者:
vonZastrow,M
影响因子:
4.8
作者:
Wilson,BS;Komuro,M;Farquhar,MG
通讯作者:
Farquhar,MG