FLAGELLAR MOTORS OF ALKALOPHILIC BACILLUS ARE POWERED BY AN ELECTROCHEMICAL POTENTIAL GRADIENT OF NA+
FLAGELLAR MOTORS OF ALKALOPHILIC BACILLUS ARE POWERED BY AN ELECTROCHEMICAL POTENTIAL GRADIENT OF NA+
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DOI：
10.1016/0014-5793(81)81178-7
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发表时间：
1981-01-01
期刊：
影响因子：
3.5
通讯作者：
IMAE, Y
中科院分区：
文献类型：
--
作者：
HIROTA, N;KITADA, M;IMAE, Y
鞭毛细菌如枯草芽孢杆菌和大肠杆菌SW&通过在嵌入细胞质膜的基部结构处旋转它们的鞭毛[1，2]。有相当多的证据表明，鞭毛基部结构是由H '，ApH+的跨膜电化学电位梯度提供动力的可逆旋转马达[3-81]。B的鞭毛马达。枯草芽孢杆菌需要约-30 mV的阈值ApH'用于其旋转，并且旋转速率在约-100 mV的A/* H'处饱和[9，10]。一些嗜碱芽孢杆菌的最佳生长pH值在9和11之间，在高pH值下游动剧烈[11，12]。然而，在[13，14]中，在pH 11时，嗜碱芽孢杆菌的ApH'仅为约-15 mV。这一结果表明，嗜碱芽孢杆菌的鞭毛马达可能是由一些能源以外的ApH+。
Flagellated bacteria such as Bacillus subtilis and Escherichia coli SW& by rotating their flagella at the basal structures which are embedded in cytoplasmic membrane [1, 2]. There is considerable evidence that the flagellar basal structure is a reversible rotary motor powered by the transmembrane electrochemical potential gradient of H’, ApH+[3-81. The flagellar motor of B. subtilis requires at threshold ApH’of about-30 mV for its rotation, and the rotation rate is saturated at a A/* H’of about-100 mV [9, 10]. Some alkalophilic Bacillus whose optimal growth pH is between 9 and 11 swim vigorously at high pH [11, 12]. However, in[13, 14] the ApH’ofanalkalophilic BaciZZus was only about-15 mV at pH 11. This result suggests that the flagellar motors of alkalophilic Bacillus may be powered by some energy sources other than ApH+.