title: Total synthesis of the structural gene for the precursor of a tyrosine suppressor transfer RNA from Escherichia coli. 5. Synthesis of the deoxyribopolynucleotide segments representing the nucleotide sequence 71-103.
abstract: Chemical syntheses of the pentadecanucleotide, d(G-G-T-G-G-G-G-T-T-C-C-C-G-A-G), the undecanucleotides, d(G-G-T-G-G-G-G-T-T-C-C) and d(C-C-C-C-A-C-C-A-C-G-G), the decanucleotide, d(G-T-A-A-T-G-C-T-T-T), and the nonanucleotides, d(A-T-T-A-C-C-C-G-T) and d(A-G-T-A-A-A-A-G-C) are described. The deoxyribopolynucleotides together represent the DNA duplex corresponding to the nucleotide sequence 71-103 (from the 3'-end) of the gene for the tyrosine suppressor tRNA. Synthesis of the guanine-rich undecanucleotide d(G-G-T-G-G-G-G-T-T-C-C) was performed by the use of a new protecting group for the guanine ring, the methylbutyryl group. The heptanucleotide d[(MeOTr)mbG-mbG-T-mbG-mbG-mbG-mbG], prepared by the new method, was condensed with the tetranucleotide d[panC-anC-T-T(Ac)]. All of the condensations described followed previously developed chemical principles and started with the N- and 5'-protected deoxyribonucleosides. Successive condensations at the 3'-end with protected mononucleotides, preformed di-, tri-, or tetranucleotides gave products which were separated by anion exchange chromatography and characterized by chemical and enzymatic methods.
mesh_terms: D001483:Base Sequence; D004269:DNA, Bacterial / Q000096:biosynthesis*; D004926:Escherichia coli / Q000378:metabolism*; D005796:Genes; D009838:Oligodeoxyribonucleotides / Q000138:chemical synthesis; D011089:Polydeoxyribonucleotides / Q000138:chemical synthesis*; D014176:Protein Biosynthesis; D012343:RNA, Transfer / Q000096:biosynthesis; D013056:Spectrophotometry, Ultraviolet; D014158:Transcription, Genetic; D014443:Tyrosine / Q000096:biosynthesis
chemical_list: D004269:DNA, Bacterial; D009838:Oligodeoxyribonucleotides; D011089:Polydeoxyribonucleotides; D014443:Tyrosine; D012343:RNA, Transfer