Transient association of the sarcoplasmic reticulum Ca2+ ATPase with the Na+/K+-ATPase and H+/K+-ATPase β-subunits during its biogenesis in Xenopus oocytes

被引：2
|
作者：
Noguchi, S
Sone, N
Kawamura, M [1 ]
机构：
[1] Univ Occupat & Environm Hlth, Sch Med, Dept Mol Cell Biol, Kitakyushu, Fukuoka 8078555, Japan
[2] Kyushu Inst Technol, Dept Biochem Engn & Sci, Iizuka, Fukuoka 8208502, Japan
来源：
JOURNAL OF CELL SCIENCE | 2003年 / 116卷 / 10期
关键词：
Ca2+ ATPase; Na+/K+ ATPase; ATPase beta-subunit; chaperone;
D O I：
10.1242/jcs.00392
中图分类号：
Q2 [细胞生物学];
学科分类号：
071009 ; 090102 ;
摘要：
We examined the effect of the beta-subunits of the Na+/K+ and H+/K+ ATPases on the biogenesis of the sarcoplasmic reticulum (SR) Ca2+ ATPase in Xenopus oocytes. Oocytes were simultaneously injected with cRNAs for both the SR Ca2+ ATPase and the beta-subunit of the Na+/K+ or the H+/K+ ATPase. Immunoprecipitation with antiserum specific for the beta-subunit of the Na+/K+ or the H+/K+ ATPase yielded not only the respective beta-subunit but also the SR Ca2+ ATPase, indicating that the SR Ca2+ ATPase was associated with the beta-subunits of the Na+/K+ and the H+/K+ ATPases. Pulse-chase experiments revealed that the complex between the SR Ca2+ ATPase and the beta-subunit of the Na+/K+ ATPase was formed transiently and dissociated during the course of maturation. This is the first report that demonstrates the association of the SR Ca2+ ATPase with the beta-subunit of the Na+/K+ and H+/K+ ATPases.
引用
收藏
页码：1875 / 1880
页数：6
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