Constitutively Active Adenylyl Cyclase Mutant Requires Neither G Proteins nor Cytosolic Regulators*
Constitutively Active Adenylyl Cyclase Mutant Requires Neither G Proteins nor Cytosolic Regulators*
复制标题
组成型活性腺苷酸环化酶突变体既不需要 G 蛋白也不需要胞浆调节剂*
DOI:
10.1074/jbc.271.31.18333
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发表时间:
1996
期刊:
影响因子:
--
通讯作者:
P. Devreotes
中科院分区:
文献类型:
--
作者:
C. Parent;P. Devreotes
Receptor-mediated G protein-linked adenylyl cyclase systems are universal signal transducers. We exploited the essential role of this cascade in Dictyostelium development to screen for random mutations in the catalytic component, ACA. This enzyme is activated by G protein βγ-subunits acting in concert with a novel cytosolic regulator, CRAC. By suppression of the CRAC-null phenotype, we isolated constitutively active versions of the enzyme that require neither exogenous stimuli nor internal regulators. One mutant displayed a 15-fold increase in its Vmax. It harbors a single amino acid substitution (L394S) affecting a conserved residue located in the first cytoplasmic loop near the N-terminal hydrophobic domain of ACA. The screening procedure can be adapted for isolation of constitutive mutations in mammalian adenylyl cyclases.
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DOI:
--
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Tang,WJ;Krupinski,J;Gilman,AG
通讯作者:
Gilman,AG
DOI:
10.1073/pnas.89.20.9809
发表时间:
1992
影响因子:
11.1
作者:
Premont,RT;Chen,J;Ma,HW;Ponnapalli,M;Iyengar,R
通讯作者:
Iyengar,R
DOI:
--
发表时间:
1994-04
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
J. Cali;J. Zwaagstra;N. Mons;D. Cooper;J. Krupinski
通讯作者:
J. Cali;J. Zwaagstra;N. Mons;D. Cooper;J. Krupinski
DOI:
10.1126/science.7792604
发表时间:
1995
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Tang,WJ;Gilman,AG
通讯作者:
Gilman,AG
影响因子:
56.9
作者:
KRUPINSKI, J;COUSSEN, F;GILMAN, AG
通讯作者:
GILMAN, AG