EVIDENCE FOR A NA+/H+ ELECTROGENIC ANTIPORTER IN AN ALKALIPHILIC CYANOBACTERIUM SYNECHOCYSTIS

被引：17

作者：

BUCK, DP

SMITH, GD

机构：

[1] Division of Biochemistry and Molecular Biology, Faculty of Science, Australian National University, A.C.T.

来源：

FEMS MICROBIOLOGY LETTERS | 1995年 / 128卷 / 03期

关键词：

CYANOBACTERIA; SYNECHOCYSTIS; ALKALIPHILE; SODIUM; NA+ H+ ELECTROGENIC ANTIPORTER;

D O I：

10.1016/0378-1097(95)00126-P

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

An alkaliphilic cyanobacterium characterized as a Synechocystis species was purified from a soil sample taken from a village in Java, Indonesia, by its preferential growth at elevated pH; it grew optimally at pH 9.5. Phosphorus nuclear magnetic resonance studies showed that the organism can maintain a Delta pH of over 2 pH units at an external pH of 10. It was observed that the viability of the organism in the dark was dependent on sodium ions. Evidence from experiments in which the extrusion of Na+ was measured from cells subjected to an alkali shock suggests that the organism possesses a Na+/H+ electrogenic antiporter which is used for the maintenance of pH homeostasis.

引用

页码：315 / 320

页数：6

共 21 条

[1] STUDIES ON NITROGEN-FIXING BLUE-GREEN ALGAE .1. GROWTH AND NITROGEN FIXATION BY ANABAENA-CYLINDRICA LEMM [J].