The vacuolar ATPase proton pump is present on intracellular vacuoles induced by Helicobacter pylori.

The vacuolar ATPase proton pump is present on intracellular vacuoles induced by Helicobacter pylori.
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液泡 ATP 酶质子泵存在于幽门螺杆菌诱导的细胞内液泡上。

DOI:
--
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发表时间:
1996
影响因子:
3
通讯作者:
C. Montecucco
C. Montecucco
中科院分区:
医学3区
文献类型:
--
作者:
E. Papini;E. Gottardi;B. Satin;M. de Bernard;P. Massari;J. Telford;R. Rappuoli;S. Sato;C. Montecucco

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幽门螺杆菌的细胞毒性菌株引起细胞的强烈空泡变性,这是由于在膜渗透性弱碱存在下晚期内体的扩大。巴非霉素是液泡型(V-)ATP酶质子泵的特异性抑制剂,可防止液泡形成。V-ATP酶的存在下,液泡膜上证明了免疫荧光与单克隆抗体(MAb)的人116 kDa的调节亚基的特异性。V-ATP酶与液泡膜上的晚期内体标记rab 7共定位。与此相反,早期再循环的内体区室没有改变的VacA细胞毒素,虽然它被赋予了V-ATP酶。针对V-ATP酶的116-kDa调节亚基的单克隆抗体的内吞作用阻断了HeLa细胞中的内体酸化并阻止了VacA作用。这些结果表明,由于V-ATP酶驱动的具有药理活性的弱碱的积累,晚期内体的选择性肿胀对于液泡的形成是必不可少的。
Cytotoxic strains of Helicobacter pylori cause an intense vacuolar degeneration of cells, due to the enlargement of late endosomes in the presence of membrane permeant weak bases. Bafilomycins, specific inhibitors of the vacuolar-type (V-) ATPase proton pump, prevent vacuole formation. The presence of the V-ATPase on vacuolar membranes was demonstrated by immunofluorescence with a monoclonal antibody (MAb) specific for the human 116-kDa regulatory subunit. The V-ATPase co-localised with the late endosomal marker rab7 on vacuolar membranes. In contrast, the early recycling endosomal compartment was not altered by the VacA cytotoxin, although it was endowed with the V-ATPase. Endocytosis of a MAb against the 116-kDa regulatory subunit of V-ATPase blocked endosomal acidification in HeLa cells and prevented VacA action. These results indicate that selective swelling of late endosomes, due to accumulation of osmotically active weak bases driven by the V-ATPase, is essential for vacuole formation.
网格蛋白包被的囊泡/突触囊泡质子泵的 116-kDa 多肽的结构。
DOI: --
发表时间: 1991
期刊: The Journal of biological chemistry
影响因子: --
作者:
Perin,MS;Fried,VA;Stone,DK;Xie,XS;Südhof,TC
通讯作者: Südhof,TC
DOI: 10.1126/science.8018146
发表时间: 1993-12-17
期刊: SCIENCE
影响因子: 56.9
作者:
BOREN, T;FALK, P;NORMARK, S
通讯作者: NORMARK, S
DOI: --
发表时间: 1994-04
期刊: The Journal of biological chemistry
影响因子: --
作者:
T. Cover;M. Tummuru;P. Cao;S. Thompson;M. Blaser
通讯作者: T. Cover;M. Tummuru;P. Cao;S. Thompson;M. Blaser
DOI: 10.1056/nejm199405053301803
发表时间: 1994-05-05
影响因子: 158.5
作者:
PARSONNET, J;HANSEN, S;FRIEDMAN, GD
通讯作者: FRIEDMAN, GD
DOI: 10.1073/pnas.85.21.7972
发表时间: 1988-11-01
影响因子: 11.1
作者:
BOWMAN, EJ;SIEBERS, A;ALTENDORF, K
通讯作者: ALTENDORF, K