Dependence on Na+ of control of cytoplasmic pH in a facultative alkalophile

FEBS Letters

Selwyn, Michael J.¹  Dawson, Alan P.¹  McLaggan, Debbie¹ 

[1]School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, England

关键词: Exiguobacterium aurantiacum;    Cytoplasmic pH;    Sodium cycle;    Na+/H+ antiport;    pH homeostasis;    pH jump;   

DOI  :  10.1016/0014-5793(84)80180-5

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Regulation of the cytoplasmic pH of Exiguobacterium aurantiacum is dependent on the presence of Na⁺ in the medium. The data suggest that above 500 μM external Na⁺ the cells are able to regulate the cytoplasmic pH by the operation of a Na⁺ cycle involving a Na⁺/H⁺ antiport and a route for rapid Na⁺ entry. Our data indicate that the rate of entry of Na⁺ is subject to control by the cytoplasmic pH via feedback inhibition.

【 授权许可】

Unknown