Preparation of Oligodeoxynucleotides Containing 6-Methylthiopurine Residues by Chemical Synthesis or Specific Methylation
作者:Yao-Zhong Xu、Qinguo Zheng、Peter Swann
DOI:10.1080/15257779508012504
日期:1995.5.1
Abstract Two methods (chemical synthesis and specific methylation) are described for the preparation of oligodeoxynucleotides containing 6-methylthiopurine residues. 6-Methylthiopurine phosphoramidite (6) is prepared and incorporated into oligomers. Methylation with methyl iodide of 6-thiopurine (or 6-thioguanine) in oligonucleotides also leads to exclusive production of 6-methylthiopurine (or 6-methylthioguanine)
Post-synthetic introduction of labile functionalities onto purine residues via 6-methylthiopurines in oligodeoxyribonucleotides
作者:Yao-Zhong Xu
DOI:10.1016/0040-4020(96)00596-0
日期:1996.8
oligodeoxynucleotides containing 6-methylthiopurine residues. 6-Methylthiopurine phosphoramidite (6) has been prepared and incorporated into oligomers. Methylation with methyl iodide of 6-thiopurine (or 6-thioguanine) in oligomers also exclusively produces oligomers containing 6-methylthiopurine (or 6-methylthioguanine). The methylthio group at defined purineresidues in the deprotected oligomers can be oxidized
6-Substituted 2-Aminopurine-2′-deoxyribonucleoside 5′-Triphosphates that Trace Cytosine Methylation
作者:Janina von Watzdorf、Andreas Marx
DOI:10.1002/cbic.201600245
日期:2016.8.17
2'-deoxyguanosine triphosphate (dGTP) analogues, DNA polymerases are able to sense the presence of a single 5mC unit in a template. Here we present the synthesis and evaluation of an extended toolbox of 6-substituted 2-aminopurine-2'-deoxyribonucleoside 5'-triphosphates modified at position 6 with various functionalities. We found that sensing of 5-methylation by this class of nucleotides is more general, not
Introduction of structural diversity into oligonucleotides containing 6-thioguanine via on-column conjugation
作者:Qinguo Zheng、Yang Wang、Eric Lattmann
DOI:10.1016/s0040-4020(03)00147-9
日期:2003.3
A method is described for the introduction of structural diversity into the thiocarbonyl group of 6-thioguanine within support-bound, fully protected oligonucleotides via 'on-column' conjugation. 2'-Deoxy-6-thioguanosine with a chemically-labile trigger at its 6-thio function was incorporated at defined sites into chemically synthesized oligonucleotides. Following selective removal of the thio-protection group the support-immobilized oligonucleotides were conjugated with various groups on-column, and then deprotected and purified to produce a number of oligomers each containing a different modified base. Since the modification is accomplished on-column without affecting other functional and protecting groups in the oligomers this method is compatible with introducing structural diversity at multiple sites in DNA. (C) 2003 Elsevier Science Ltd. All rights reserved.