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温度驯化对金鱼肠道三磷酸腺苷酶的温度依赖性和哇巴因敏感性的影响。

Influence of temperature acclimatization on the temperature-dependence and ouabain-sensitizing of goldfish intestinal adenosine triphosphatase.

作者信息

Smith M W

出版信息

Biochem J. 1967 Oct;105(1):65-71. doi: 10.1042/bj1050065.

Abstract
  1. Homogenates of goldfish intestinal mucosa were separated into various fractions by differential centrifugation. Both adenosine-triphosphatase and beta-glycerophosphatase activities were found to be concentrated mainly in a membrane fraction which sedimented after 1200000g-min. 2. This membrane adenosine-triphosphatase system was activated by Na(+)+K(+) and inhibited by ouabain. 3. The ouabain-sensitive adenosine-triphosphatase activity was high and the ouabain-insensitive activity low in membrane fractions prepared from fish acclimatized previously to 8 degrees . The opposite was true for fish acclimatized to 30 degrees . 4. The Arrhenius plots of ouabain-sensitive and ouabain-insensitive adenosine-triphosphatase activities, measured from 5 degrees to 30 degrees , showed discontinuities at incubation temperatures that varied with the previous acclimatization temperature of the fish. 5. It is considered that modification of the membrane adenosine-triphosphatase system in goldfish intestinal mucosa may serve to regulate Na(+) transport at different environmental temperatures.
摘要
  1. 通过差速离心将金鱼肠黏膜匀浆分离成不同组分。发现腺苷三磷酸酶和β-甘油磷酸酶活性主要集中在一个在1200000g离心分钟后沉淀的膜组分中。2. 这种膜腺苷三磷酸酶系统被Na(+)+K(+)激活,并被哇巴因抑制。3. 在先前适应8摄氏度的鱼制备的膜组分中,哇巴因敏感的腺苷三磷酸酶活性高,而哇巴因不敏感的活性低。对于适应30摄氏度的鱼则相反。4. 在5摄氏度至30摄氏度下测量的哇巴因敏感和哇巴因不敏感的腺苷三磷酸酶活性的阿伦尼乌斯曲线在孵育温度处出现不连续,该温度随鱼先前的适应温度而变化。5. 据认为,金鱼肠黏膜中膜腺苷三磷酸酶系统的修饰可能有助于在不同环境温度下调节Na(+)转运。

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Amino acid transport in the goldfish intestine.金鱼肠道中的氨基酸转运
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