作者:Dadong Li、Xiaojian Wang、Fubo Shi、Ruojie Sha、Nadrian C. Seeman、James W. Canary
DOI:10.1039/c4ob01552e
日期:——
We describe two DNA-templated ligation strategies: native chemical ligation (NCL), and thiol-disulfide exchange. Both systems result in successful ligation in the presence of a DNA template. The stability of the product from the NCL reaction relies on exogenous thiol, while the thiol-disulfide reaction proceeds in a catalyst-free manner.
我们介绍了两种以 DNA 为模板的连接策略:原生化学连接(NCL)和硫醇-二硫化物交换。这两种系统都能在 DNA 模板存在的情况下成功连接。NCL 反应产物的稳定性依赖于外源硫醇,而硫醇-二硫化物反应则以无催化剂的方式进行。
Efficient Conjugation of Peptides to Oligonucleotides by “Native Ligation”
作者:Dmitry A. Stetsenko、Michael J. Gait
DOI:10.1021/jo000214z
日期:2000.8.1
A new strategy has been developed for conjugation of peptides to oligonucleotides. The method is based on the "native ligation" of an N-terminal thioester-functionalized peptide to a 5'-cysteinyl oligonucleotide. Two new reagents were synthesized for use in solid-phasepeptide and oligonucleotide synthesis, respectively. Pentafluorophenyl S-benzylthiosuccinate was used in the final coupling step in
Semisynthetic proteinâDNA hybrid molecules have recently attracted much attention as valuable tools for bioanalytical chemistry and nanobiotechnology. Here we describe a synthetic method for conjugating oligonucleotides to the N-terminus of recombinant proteins. Our strategy involves the conversion of amine-terminated oligonucleotides to thioester-functionalized oligonucleotides by using a bifunctional reagent bearing an N-hydroxysuccinimide ester and benzyl thioester group, followed by native chemical ligation with proteins containing an N-terminal cysteine. We applied this technique to construct split luciferase fragmentâDNA hybrid systems in which the catalytic activity of split luciferase is restored by the re-assembly of each fragment through a specific DNAâprotein or DNAâDNA interaction. Split protein fragmentâDNA hybrids will offer new opportunities to explore the potential of proteinâDNA conjugates for various applications.