Acquired Thermotolerance and Temperature-Induced Protein Accumulation in the Extremely Thermophilic BacteriumRhodothermus obamensis

Ken Takai; Takuro Nunoura; Yoshihiko Sako; Aritsune Uchida

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Acquired Thermotolerance and Temperature-Induced Protein Accumulation in the Extremely Thermophilic BacteriumRhodothermus obamensis

机译：极端嗜热细菌中的获得性耐热性和温度诱导的蛋白质积累

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Temperature-induced changes in thermotolerance and protein composition were examined in heat-shocked cells and high-temperature-grown cells of the extremely thermophilic bacteriumRhodothermus obamensis. The survival at temperatures superoptimal for growth (90 and 95°C) was enhanced in both heat-shocked cells and high-temperature-grown cells relative to that of cells grown at optimal temperatures. In a comparison of protein composition using two-dimensional gel electrophoresis, putative heat shock proteins (HSPs) and high-temperature growth-specific proteins (HGPs) were detected. N-terminal amino acid sequence analysis revealed that the putative HSPs were quite similar to the ATP-binding subunits of ABC transporters and the HGPs were proteins corresponding to domains II and III of elongation factor Tu. These results suggested that this extreme thermophile has developed temperature-induced responses that include increased survival under hyperthermal conditions, changes in protein composition, and also the production of novel HSPs.

机译：在极度嗜热的细菌 Rhodothermus obamensis 的热激细胞和高温生长的细胞中研究了温度诱导的耐热性和蛋白质组成的变化。相对于在最佳温度下生长的细胞，热激细胞和高温生长的细胞均能在最佳生长温度（90和95°C）下存活。在使用二维凝胶电泳比较蛋白质组成的过程中，检测到了假定的热激蛋白（HSP）和高温生长特异性蛋白（HGPs）。 N端氨基酸序列分析表明，推测的HSP与ABC转运蛋白的ATP结合亚基非常相似，HGP是与延伸因子Tu的结构域II和III对应的蛋白。这些结果表明，这种极端嗜热菌已经产生了温度诱导的反应，包括在高温条件下增加的存活率，蛋白质组成的变化以及新型HSP的产生。 展开▼

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《Journal of bacteriology》 |1998年第10期|共5页

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Ken Takai; Takuro Nunoura; Yoshihiko Sako; Aritsune Uchida;
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中图分类微生物学;

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机译：在极嗜热的古细菌Sulfolobus sp。中获得热耐受性和热冲击。菌株B12。

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机译：嗜热古生菌中金属蛋白中铁硫簇的电子和磁性

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机译：注意：极度嗜热细菌Rhodothermus obamensis的获得的耐热性和温度诱导的蛋白质积累

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Acquired Thermotolerance and Temperature-Induced Protein Accumulation in the Extremely Thermophilic BacteriumRhodothermus obamensis

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