Petersen G B, Stockwell P A, Hill D F
Department of Biochemistry, University of Otago, Dunedin, New Zealand.
EMBO J. 1988 Dec 1;7(12):3957-62. doi: 10.1002/j.1460-2075.1988.tb03282.x.
Examination of the nucleotides following the ATG or GTG initiation codons of a file of 251 genes from Escherichia coli has shown that 247 (98.4%) of them contain a sequence of at least three and 168 (66.9%) of them a sequence of at least four consecutive nucleotides that is complementary to some part of the 16 nt at the 5' terminus of the bacterial 16S rRNA. It is proposed that this sequence, which falls within the first 24 nt coding for the genetic message, might be involved in mRNA recognition through a mechanism analogous to the well-established 'Shine--Dalgarno' interaction with the 3' terminus of the 16S rRNA. Comparison of these data with data derived from a file of 117 'false' gene starts that have a Shine--Dalgarno-like sequence followed by a suitably spaced ATG or GTG triplet but which are believed not to lie at the beginnings of genetic messages shows the association that we have found to be statistically significant at the 99.9% level.
对来自大肠杆菌的251个基因的文件中ATG或GTG起始密码子后的核苷酸进行检查发现,其中247个(98.4%)含有至少三个连续核苷酸的序列,168个(66.9%)含有至少四个连续核苷酸的序列,该序列与细菌16S rRNA 5'末端的16个核苷酸的某些部分互补。有人提出,这个位于编码遗传信息的前24个核苷酸内的序列,可能通过一种类似于已确立的与16S rRNA 3'末端的“Shine-Dalgarno”相互作用的机制参与mRNA识别。将这些数据与来自117个“假”基因起始位点的文件数据进行比较,这些“假”基因起始位点有一个类似Shine-Dalgarno的序列,后面跟着一个间隔合适的ATG或GTG三联体,但据信它们并不位于遗传信息的起始位置,结果表明我们发现的这种关联在99.9%的水平上具有统计学意义。