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The Relationship between Chemiosmotic Parameters and Sensitivity to Anions and Organic Acids in the Acidophile Thiobacillus Ferrooxidans

机译:嗜酸亚铁氧化硫硫杆菌中化学渗透参数与对阴离子和有机酸的敏感性之间的关系

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摘要

We investigated the relationships between the trans-cytoplasmic-membrane chemiosmotic parameters, viz. the membrane potential and the pH difference, and the toxicity of anions and organic acids in the acidophile Thiobacillus ferrooxidans. Organic acids accumulated in the cytoplasm in response to the transmembrane pH difference and inorganic anions could be caused to accumulate in response to the membrane potential. The distribution of the organic acids was unaffected by the membrane potential and that of the anions was not influenced by the pH difference. These accumulations may be toxic because of a direct effect of a high concentration of the anion in the cytoplasm or by acidification of the cytoplasm. The point of inhibition of respiration was at the level of the respiratory chain cytochrome oxidase when Fe(II) was the respiratory substrate.
机译:我们研究了跨胞质膜化学渗透参数之间的关系。嗜酸铁氧化硫硫杆菌中膜电位和pH的差异,以及阴离子和有机酸的毒性。响应于跨膜pH值差异而在细胞质中积累的有机酸和响应于膜电位而引起的无机阴离子的积累。有机酸的分布不受膜电位的影响,阴离子的分布不受pH差的影响。这些积累可能是有毒的,因为在细胞质中高浓度阴离子的直接作用或在细胞质中的酸化作用。当Fe(II)是呼吸底物时,抑制呼吸的点位于呼吸链细胞色素氧化酶的水平。

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