嗜热菌中的细胞内蛋白质分解
Intracellular protein breakdown in a thermophile.
作者信息
Epstein I, Grossowicz N
出版信息
J Bacteriol. 1969 Aug;99(2):418-21. doi: 10.1128/jb.99.2.418-421.1969.
Abstract
Protein breakdown of 5 to 7% per hr was found in nitrogen-starved cells of an unclassified prototrophic thermophilic bacillus; a similar protein-breakdown rate (6.5% per hr) was found in resting cells of Escherichia coli. In the thermophile, the rate of protein breakdown was markedly influenced by the temperature; it was maximal between 45 and 55 C, and it decreased considerably at 35 and 75 C, temperatures which are only slightly below or above the minimal and maximal growth temperatures. Growing cultures of the thermophile showed little, if any, protein breakdown, a finding similar to that of others with E. coli.
摘要
在一种未分类的原养型嗜热芽孢杆菌的氮饥饿细胞中，发现每小时蛋白质分解率为5%至7%；在大肠杆菌的静止细胞中也发现了类似的蛋白质分解率（每小时6.5%）。在嗜热菌中，蛋白质分解率受温度的显著影响；在45至55℃之间最高，在35℃和75℃时显著下降，这两个温度仅略低于或高于最低和最高生长温度。嗜热菌的生长培养物几乎没有蛋白质分解，这一发现与其他关于大肠杆菌的研究结果相似。
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