Expression, Purification, and Characterization of Isoform 1 of the Plasma Membrane Ca2+ Pump
Expression, Purification, and Characterization of Isoform 1 of the Plasma Membrane Ca2+ Pump
复制标题
血浆膜 Ca2 泵异构体 1 的表达、纯化和表征
DOI:
--
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发表时间:
2003
影响因子:
4.8
通讯作者:
E. Carafoli
中科院分区:
文献类型:
--
作者:
D. Guerini;Bin Pan;E. Carafoli
The plasma membrane Ca2+ ATPase isoform 1(PMCA1) is ubiquitously distributed in tissues and cells, but only scarce information is available on its properties. The isoform was overexpressed in Sf9 cells, purified on calmodulin columns, and characterized functionally. The level of expression was very low, but sufficient amounts of the protein could be isolated for biochemical characterization. The affinity of PMCA1 for calmodulin was similar to that of PMCA4, the other ubiquitous PMCA isoform. The affinity of PMCA1 for ATP, evaluated by the formation of the phosphorylated intermediate, was higher than that of the PMCA4 pump. The recombinant PMCA1 pump was a much better substrate for the cAMP-dependent protein kinase than the PMCA2 and PMCA4 isoforms. Pulse and chase experiments on Sf9 cells overexpressing the PMCA pumps showed that PMCA1 was much less stable than the PMCA4 and PMCA2 isoforms, i.e. PMCA1 had a much higher sensitivity to degradation by calpain. The effect of calpain was not the result of a general higher susceptibility of the PMCA1 to proteolytic degradation, because the pattern of degradation by trypsin was the same in the three isoforms.
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DOI:
10.1016/0169-328x(92)90229-5
发表时间:
1992-12
期刊:
Brain research. Molecular brain research
影响因子:
--
作者:
William L. Stahl;T. J. Eakin;JAMES W. M. Owens;J. Breininger;P. Filuk;W. R. Anderson
通讯作者:
William L. Stahl;T. J. Eakin;JAMES W. M. Owens;J. Breininger;P. Filuk;W. R. Anderson
DOI:
--
发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Shull,GE;Greeb,J
通讯作者:
Greeb,J
DOI:
10.1016/s0021-9258(18)51505-2
发表时间:
1989-11
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
J. Greeb;G. Shull
通讯作者:
J. Greeb;G. Shull
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Keeton,TP;Burk,SE;Shull,GE
通讯作者:
Shull,GE
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Brandt,P;Neve,RL;Kammesheidt,A;Rhoads,RE;Vanaman,TC
通讯作者:
Vanaman,TC