Jarsch M, Böck A
Nucleic Acids Res. 1983 Nov 11;11(21):7537-44. doi: 10.1093/nar/11.21.7537.
The DNA sequence of the spacer (plus flanking) regions separating the 16S rRNA and 23S rRNA genes of two presumptive rDNA operons of the archaebacterium Methanococcus vannielii was determined. The spacers are 156 and 242 base pairs in size and they share a sequence homology of 49 base pairs following the 3' terminus of the 16S rRNA gene and of about 60 base pairs preceding the 5' end of the 23S rRNA gene. The 242 base pair spacer, in addition contains a sequence which can be transcribed into tRNAAla, whereas no tRNA-like secondary structure can be delineated from the 156 base pair spacer region. Almost complete sequence homology was detected between the end of the 16S rRNA gene and the 3' termini of either Escherichia coli or Halobacterium halobium 16S rRNA, whereas the putative 5' terminal 23S rRNA sequence shared partial homology with E. coli 23S rRNA and eukaryotic 5.8S rRNA.
测定了嗜甲烷球菌两个假定的rDNA操纵子中,分隔16S rRNA基因和23S rRNA基因的间隔区(加上侧翼)的DNA序列。间隔区大小分别为156和242个碱基对,它们在16S rRNA基因3'末端之后有49个碱基对的序列同源性,在23S rRNA基因5'末端之前约有60个碱基对的序列同源性。此外,242个碱基对的间隔区还包含一个可转录为丙氨酸tRNA的序列,而从156个碱基对的间隔区无法描绘出类似tRNA的二级结构。在16S rRNA基因的末端与大肠杆菌或嗜盐菌的16S rRNA的3'末端之间检测到几乎完全的序列同源性,而假定的23S rRNA 5'末端序列与大肠杆菌23S rRNA和真核生物5.8S rRNA有部分同源性。