Extracellular Interaction of the Voltage-dependent Ca2+ Channel α2δ and α1 Subunits*
Extracellular Interaction of the Voltage-dependent Ca2+ Channel α2δ and α1 Subunits*
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电压依赖性 Ca2+ 通道 α2δ 和 α1 亚基的细胞外相互作用*
DOI:
--
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发表时间:
1997
影响因子:
4.8
通讯作者:
K. Campbell
中科院分区:
文献类型:
--
作者:
C. Gurnett;R. Felix;K. Campbell
The role of the extracellular domain of the voltage-dependent Ca2+ channel α2δ subunit in assembly with the α1Csubunit was investigated. Transiently transfected tsA201 cells processed the α2δ subunit properly as disulfide linkages and cleavage sites between the α2 and δ subunits were shown to be similar to native channel protein. Coimmunoprecipitation experiments demonstrated that in the absence of δ subunits, α2 subunits do not assemble with α1 subunits. Furthermore, the transmembrane and cytoplasmic sequences in δ can be exchanged with those of an unrelated protein without any effect on the association between the α2δ and α1 proteins. Extracellular domains of the α2δ subunit are also shown to be responsible for increasing the binding affinity of [3H]PN200-110 (isopropyl-4-(2,1,3-benzoxadiazol-4-yl)-1,4-dihydro-2,6-dimethyl-5-([3H]methoxycarbonyl)-pyridine-3-carboxylate) for the α1C subunit. Investigation of the corresponding interaction site on the α1 subunit revealed that although tryptic peptides containing repeat III of native α1S subunit remain in association with the α2δ subunit during wheat germ agglutinin chromatography, repeat III by itself is not sufficient for assembly with the α2δ subunit. Our results suggest that the α2δ subunit likely interacts with more than one extracellular loop of the α1 subunit.
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DOI:
10.1073/pnas.84.15.5478
发表时间:
1987-08-01
影响因子:
11.1
作者:
TAKAHASHI, M;SEAGAR, MJ;CATTERALL, WA
通讯作者:
CATTERALL, WA
DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Sharp,AH;Imagawa,T;Leung,AT;Campbell,KP
通讯作者:
Campbell,KP
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Hamrick,M;Renaud,KJ;Fambrough,DM
通讯作者:
Fambrough,DM
DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Cooper,CL;Vandaele,S;Barhanin,J;Fosset,M;Lazdunski,M;Hosey,MM
通讯作者:
Hosey,MM
影响因子:
20.1
作者:
Makita,N;BennettJr,PB;GeorgeJr,AL
通讯作者:
GeorgeJr,AL