枯草芽孢杆菌在芽孢形成过程中30S核糖体亚基的特异性改变。
Specific alteration of the 30S ribosomal subunits of Bacillus subtilis during sporulation.
作者信息
Guha S, Szulmajster J
出版信息
J Bacteriol. 1977 Sep;131(3):866-71. doi: 10.1128/jb.131.3.866-871.1977.
Abstract
Active 30S ribosomal subunits were isolated from vegetative and sporulating cells of Bacillus subtilis. Both subunits were able to function in polyuridylic acid of phage phie messenger ribonucleic acid-dependent protein synthesis in vitro. The sporulation 30S subunits were highly active in polyuridylic acid-dependent polyphenylalanine synthesis but showed a reduced activity in the presence of natural messenger ribonucleic acid as compared with their vegetative counter-parts. The reduced activity was independent of the source of 50S particles and initiation factors (vegetative or sporulation). The alteration of the 30S sporulation subunits appears to be related to the sporulation process, since the same subunits isolated from stationary-phase cells of an asporogenic mutant did not show any impairment in protein synthesis in vitro.
摘要
从枯草芽孢杆菌的营养细胞和芽孢形成细胞中分离出活性30S核糖体亚基。这两种亚基在体外噬菌体φ29信使核糖核酸依赖性蛋白质合成的多聚尿苷酸中均能发挥作用。芽孢形成的30S亚基在多聚尿苷酸依赖性聚苯丙氨酸合成中高度活跃，但与营养型对应亚基相比，在天然信使核糖核酸存在的情况下活性降低。活性降低与50S颗粒和起始因子的来源（营养型或芽孢形成型）无关。30S芽孢形成亚基的改变似乎与芽孢形成过程有关，因为从无芽孢突变体的稳定期细胞中分离出的相同亚基在体外蛋白质合成中未显示任何损伤。
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