Characterization of native and reconstituted hydrogen ion pumping adenosinetriphosphatase of chromaffin granules.
Characterization of native and reconstituted hydrogen ion pumping adenosinetriphosphatase of chromaffin granules.
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嗜铬颗粒的天然和重构氢离子泵三磷酸腺苷酶的表征。
DOI:
10.1021/bi00365a029
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发表时间:
1986
期刊:
影响因子:
2.9
通讯作者:
Rudnick,G
中科院分区:
文献类型:
--
作者:
Dean,GE;Nelson,PJ;Rudnick,G
Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06510 Received November 22, 1985; Revised Manuscript Received April 3, 1986 abstract: The ATP-dependent H+ pump from adrenal chromaffin granules is, like theplatelet-dense granule H+ pump, essentially insensitiveto the mitochondrial ATPase inhibitors sodiumazide, efrapeptin, and oligomycin andalso insensitive to vanadate and ouabain, agents that inhibit the Na+, K+-ATPase. The chromaffin granule H+ pump is, however, sensitive to low concentrations of NEM (TV-ethylmaleimide) and Nbd-Cl (7-chloro-4-nitro-2, 1, 3-benzoxadiazole). These transport ATPases may thus belong to a new class of ATP-dependent ion pumps distinct from F^ q-and phosphoenzyme-type ATPases. Comparisons of ATP hydrolysis with ATP-dependent serotonin transport suggest that approximately 80% of the ATPase activity in purified chromaffin granule membranes is coupled to H+ pumping. Most of the remaining ATPase activity is due to contaminating mitochondrial ATPase and Na+, K+-ATPase. When extracted with cholate and octyl glucoside, the H+ pump is solubilized in a monodisperse form that retains NEM-sensitive ATPase activity. When reconstituted into proteoliposomes with crude brain phospholipid, the extracted enzyme recovers ATP-dependent H+ pumping, which shows the same inhibitor sensitivity and nucleotide dependence as the native pump. These data demonstrate that the predominant ATP hydrolase of chromaffin granule membrane is also responsible for ATP-driven amine transport and granule acidification in both native and reconstituted membranes.
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影响因子:
4.8
作者:
S. Cidon;H. Ben;N. Nelson
通讯作者:
N. Nelson
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
D. Njus;J. Knoth;M. Zallakian
通讯作者:
M. Zallakian
影响因子:
4.1
作者:
K. J. Cattell;C. Lindop;I. G. Knight;R. B. Beech
通讯作者:
R. B. Beech
DOI:
--
发表时间:
1964
期刊:
影响因子:
--
作者:
I. Glynn;J. Chappell
通讯作者:
J. Chappell
影响因子:
3.9
作者:
R. Serrano
通讯作者:
R. Serrano