Bulygin K N, Graifer D M, Repkova M N, Smolenskaya I A, Veniyaminova A G, Karpova G G
Novosibirsk Institute of Bioorganic Chemistry, Siberian Branch of Russian Academy of Sciences.
RNA. 1997 Dec;3(12):1480-5.
mRNA analogues-derivatives of oligoribonucleotides consisting of two different codons and bearing an aryl azide group at the 5'-phosphates-were crosslinked to human 80S ribosomes by UV-irradiation of the various model complexes obtained in the presence of the cognate tRNAs. Three sequences, namely pUUUGUU (coding for Phe and Val), pUUCUAAA (first triplet coding for Phe and second being stop-codon), and pGUGUUU (coding for Val and Phe), have been used. Sequences of 18S rRNA containing nucleotides crosslinked to the mRNA analogues were examined by hydrolysis with RNase H in the presence of various cDNA probes. Crosslinked nucleotides were identified by primer extension. In all cases, only nucleotide G-1207 (equivalent to G-926 in Escherichia coli 16S rRNA) has been detected as crosslinked. Crosslinking of the mRNA analogues to the large ribosomal subunit was negligible.
信使核糖核酸类似物——由两个不同密码子组成且在5'-磷酸处带有芳基叠氮基团的寡核糖核苷酸衍生物,通过对在同源转运核糖核酸存在下获得的各种模型复合物进行紫外线照射,与人类80S核糖体交联。使用了三个序列,即pUUUGUU(编码苯丙氨酸和缬氨酸)、pUUCUAAA(第一个三联体编码苯丙氨酸,第二个是终止密码子)和pGUGUUU(编码缬氨酸和苯丙氨酸)。在各种互补脱氧核糖核酸探针存在的情况下,通过核糖核酸酶H水解来检查与信使核糖核酸类似物交联的18S核糖体核糖核酸的序列。通过引物延伸鉴定交联的核苷酸。在所有情况下,仅检测到核苷酸G-1207(相当于大肠杆菌16S核糖体核糖核酸中的G-926)被交联。信使核糖核酸类似物与大核糖体亚基的交联可以忽略不计。