Role of the Prenyl Group on the G Protein γ Subunit in Coupling Trimeric G Proteins to A1 Adenosine Receptors*
Role of the Prenyl Group on the G Protein γ Subunit in Coupling Trimeric G Proteins to A1 Adenosine Receptors*
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G 蛋白 γ 亚基上的异戊二烯基团在三聚体 G 蛋白与 A1 腺苷受体偶联中的作用*
DOI:
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发表时间:
1996
影响因子:
4.8
通讯作者:
J. Garrison
中科院分区:
文献类型:
--
作者:
H. Yasuda;M. Lindorfer;K. Woodfork;J. E. Fletcher;J. Garrison
The coupling of receptors to heterotrimeric G proteins is determined by interactions between the receptor and the G protein α subunits and by the composition of the βγ dimers. To determine the role of the γ subunit prenyl modification in this interaction, the CaaX motifs in the γ1 and γ2 subunits were altered to direct modification with different prenyl groups, recombinant βγ dimers expressed in the baculovirus/Sf9 insect cell system, and the dimers purified. The activity of the βγ dimers was compared in two assays: formation of the high affinity agonist binding conformation of the A1 adenosine receptor and receptor-catalyzed exchange of GDP for GTP on the α subunit. The β1γ1 dimer (modified with farnesyl) was significantly less effective than β1γ2 (modified with geranylgeranyl) in either assay. The β1γ1-S74L dimer (modified with geranylgeranyl) was nearly as effective as β1γ2 in either assay. The β1γ2-L71S dimer (modified with farnesyl) was significantly less active than β1γ2. Using 125I-labeled βγ subunits, it was determined that native and altered βγ dimers reconstituted equally well into Sf9 membranes containing A1 adenosine receptors. These data suggest that the prenyl group on the γ subunit is an important determinant of the interaction between receptors and G protein γ subunits.
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DOI:
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发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Kisselev,O;Gautam,N
通讯作者:
Gautam,N
DOI:
10.1146/annurev.pa.30.040190.003331
发表时间:
1990
影响因子:
12.5
作者:
L. Birnbaumer
通讯作者:
L. Birnbaumer
DOI:
10.1073/pnas.87.15.5868
发表时间:
1990
影响因子:
11.1
作者:
Yamane,HK;Farnsworth,CC;Xie,HY;Howald,W;Fung,BK;Clarke,S;Gelb,MH;Glomset,JA
通讯作者:
Glomset,JA
影响因子:
20.1
作者:
Linden,J;Patel,A;Sadek,S
通讯作者:
Sadek,S
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Fung,BK
通讯作者:
Fung,BK