CORRELATION BETWEEN THE RESPIRATION-DRIVEN NA+ PUMP AND NA+-DEPENDENT AMINO-ACID-TRANSPORT IN MODERATELY HALOPHILIC BACTERIA

被引:12
作者
UNEMOTO, T
AKAGAWA, A
HAYASHI, M
机构
[1] Laboratory of Membrane Biochemistry, Faculty of Pharmaceutical Sciences, Chiba University, Inage-ku, Chiba 263
来源
JOURNAL OF GENERAL MICROBIOLOGY | 1993年 / 139卷
关键词
D O I
10.1099/00221287-139-11-2779
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The effect of Na+ on amino acid uptake by moderately halophilic bacteria was examined using alpha-aminoisobutyric acid (AIB) as a nonmetabolizable amino acid analogue. Of the eight moderate halophiles investigated, the six Gram-negative bacteria that have a respiration-driven Na+ pump specifically required Na+ for AIB uptake. On the other hand, the two Gram-positive bacteria that have no respiration-driven Na+ pump showed no requirement for Na+ for AIB uptake. Thus, the mode of energy coupling to amino acid transport was quite different between the Gram-negative and Gram-positive moderate halophiles tested: the former, but not the latter, utilized Na+ circulation for the active uptake of AIB.
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页码:2779 / 2782
页数:4
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