The gastric H+,K+-ATPase: the site of action of omeprazole.
The gastric H+,K+-ATPase: the site of action of omeprazole.
复制标题
胃H ,K -ATP酶:奥美拉唑的作用部位。
DOI:
10.3109/00365528909091236
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发表时间:
1989
期刊:
影响因子:
--
通讯作者:
B. Wallmark
中科院分区:
文献类型:
--
作者:
George Sachs;B. Wallmark
The mammalian parietal cell is dedicated to the secretion of HCl in response to various stimuli and second messengers. Oxidative metabolism in the cell increases about 10-fold in order to supply ATP to the gastric proton pump, the H+,K+-ATPase. This pump appears to be present only in the parietal cell. This membrane-embedded enzyme uses the scalar energy of ATP hydrolysis to carry out the vectorial transport of H+ in one direction in exchange for K+ in the other direction. In the cytoplasmic vesicle, K+ does not permeate the membrane, whereas in the secretory canaliculus, there is a Cl- channel and a KCl cotransport pathway which allow K+ and Cl- to exit from the cell. The K+ is then recycled back into the cell by the ATPase, and H+ secretion occurs into the canalicular space. Although there are other proton pumps, only the gastric H+,K+-ATPase has this exchange mechanism and only the gastric H+,K+-ATPase is able to generate a pH of less than 4. Thus the gastric proton pump has a unique structure and mechanism, and produces a unique luminal pH. This enzyme is therefore an appropriate target for rational drug design.
DOI:
--
发表时间:
1986
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Rabon,E;Wilke,M;Sachs,G;Zampighi,G
通讯作者:
Zampighi,G
DOI:
--
发表时间:
1986
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Shull,GE;Lingrel,JB
通讯作者:
Lingrel,JB
DOI:
--
发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Muallem,S;Blissard,D;CragoeJr,EJ;Sachs,G
通讯作者:
Sachs,G