[粪肠球菌中能量依赖的H⁺和K⁺离子通量的耦合]
[Coupling of energy-dependent H+ and K+ ion fluxes in Streptococcus faecalis].
作者信息
Martirosov S M, Petrosian L S
出版信息
Biofizika. 1980 Jul-Aug;25(4):742-3.
PMID:6774769
Abstract
Grampositive bacteria S. faecalis are capable of uptaking potassium ions during many hours in the media containing glucose. Such behaviour of K+-uptake indicates that this system is not regulated as it takes place in gramnegative bacteria E. coli (1,3). The stoichimetry of DCCD-sensitive exchange between H+ and K+ ions equals 2:1. It is possible that S. faecalis possesses an electrogenic proton-potassium pump which can exchange 2H+ from the cell for external K+.
摘要
革兰氏阳性菌粪肠球菌能够在含有葡萄糖的培养基中长时间摄取钾离子。这种钾离子摄取行为表明，该系统不像革兰氏阴性菌大肠杆菌那样受到调控（1,3）。氢离子和钾离子之间对二环己基碳二亚胺（DCCD）敏感的交换化学计量比为2:1。粪肠球菌可能拥有一种生电质子 - 钾泵，它可以将细胞内的2个氢离子与外部的钾离子进行交换。
相似文献
1
[Coupling of energy-dependent H+ and K+ ion fluxes in Streptococcus faecalis].
Biofizika. 1980 Jul-Aug;25(4):742-3.
2
[Proton-potassium exchange in Escherichia coli].
Biofizika. 1980 May-Jun;25(3):469-72.
3
[Independent functioning of the H+-K+ ion exchange systems in E. coli].
Biofizika. 1981 Sep-Oct;26(5):817-21.
4
[The capacity of anaerobically grown bacteria to exchange the 2H+ of the cell for the K+ of the medium and to maintain a high K+ distribution between cell and medium].
Nauchnye Doki Vyss Shkoly Biol Nauki. 1986(12):82-8.
5
Regulation of intracellular pH and proton-potassium exchange in fermenting Escherichia coli grown anaerobically in alkaline medium.
Membr Cell Biol. 1998;12(1):67-78.
6
[Osmotic activity and ionic permeability of membrane vesicles from Streptococcus faecalis and Micrococcus lysodeikticus cells].
Biokhimiia. 1977 Dec;42(12):2228-34.
7
[H+-K+-exchange and formation of H2 in E. coli mutants with defects in the H+-ATPase complex and potassium transport].
Biofizika. 1993 Jul-Aug;38(4):678-83.
8
[Letter: Kinetics of energy-dependent exchange of H+ and K+ in Streptococcus faecalis].
Biofizika. 1974 Jan-Feb;19(1):188-90.
9
[Systems of H+ K+ ion exchange in E. coli].
Biofizika. 1982 Jan-Feb;27(1):48-51.
10
[Relation between H2 production and energy-dependent metabolism of H+ and K+ ions in E.coli].
Biofizika. 1990 May-Jun;35(3):440-3.
Zotero 插件