MAINTENANCE OF A NEUTRAL CYTOPLASMIC PH IS NOT OBLIGATORY FOR GROWTH OF ESCHERICHIA-COLI AND STREPTOCOCCUS-FAECALIS AT AN ALKALINE PH

被引:34
作者
MUGIKURA, S [1 ]
NISHIKAWA, M [1 ]
IGARASHI, K [1 ]
KOBAYASHI, H [1 ]
机构
[1] CHIBA UNIV,FAC PHARMACEUT SCI,CHIBA 260,JAPAN
关键词
D O I
10.1093/oxfordjournals.jbchem.a123168
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Both Escherichia coli and Streptococcus faecalis grew in an alkaline medium containing 100 μM carbonyl cyanide m-chlorophenylhydrazone (CCCP). Our data suggested that CCCP functioned as a protonophore at a high pH and that the proton-motive force was dissipated almost completely under such conditions. The pH gradient measured with dimethyl-oxazolidine-2,4-dione and acetylsalicylic acid was very small in both bacteria at a high pH above 8, and was not affected significantly by the addition of CCCP. Based on these findings, we propose that the maintenance of neutral cytoplasmic pH is not obligatory for the growth of E. coli and S. faecalis in an alkaline medium. © 1990 Copyright, 1990 by the Journal of Biochemistry.
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收藏
页码:86 / 91
页数:6
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