蓝藻集胞藻6803中23S核糖体核糖核酸的成熟后切割及其代谢调控
Postmaturational cleavage of 23s ribosomal ribonucleic acid and its metabolic control in the blue-green alga Anacystis nidulans.
作者信息
Doolittle W F
出版信息
J Bacteriol. 1973 Mar;113(3):1256-63. doi: 10.1128/jb.113.3.1256-1263.1973.
Abstract
Data are presented consistent with the notion that the 23s ribosomal ribonucleic acid (rRNA) of Anacystis nidulans undergoes specific endonucleolytic cleavage in vivo, to produce two fragments with molecular weights of 0.88 x 10(6) and 0.17 x 10(6) daltons. Cleavage occurred at random after 23s rRNA formation and was stimulated by light in this organism, an obligately photoautotrophic unicellular blue-green alga. The half-life of intact 23s rRNA was about 5 h in illuminated cultures and 10 h in unilluminated cultures. 3-(p-Chlorophenyl)-1, 1-dimethylurea, an inhibitor of photosystem II, retarded 23s rRNA cleavage in the light. The results are discussed in the context of recent reports of rRNA instability in a variety of eukaryotic and prokaryotic organisms.
摘要
所呈现的数据与以下观点一致
集胞藻（Anacystis nidulans）的23S核糖体核糖核酸（rRNA）在体内经历特异性内切核酸酶切割，产生两个分子量分别为0.88×10⁶和0.17×10⁶道尔顿的片段。切割在23S rRNA形成后随机发生，并受到这种生物（一种专性光合自养单细胞蓝藻）光照的刺激。完整23S rRNA的半衰期在光照培养物中约为5小时，在未光照培养物中约为10小时。光系统II的抑制剂3 - （对氯苯基）-1,1 - 二甲基脲在光照下延缓了23S rRNA的切割。本文结合近期关于多种真核生物和原核生物中rRNA不稳定性的报道对这些结果进行了讨论。
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