Phosphoramidate Ligation of Oligonucleotides in Nanoscale Structures

Phosphoramidate Ligation of Oligonucleotides in Nanoscale Structures
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纳米级结构中寡核苷酸的氨基磷酸酯连接

DOI:
10.1002/cbic.201600061
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发表时间:
2016
期刊:
影响因子:
3.2
通讯作者:
C. Richert
C. Richert
中科院分区:
生物学3区
文献类型:
--
作者:
Matthäus Kalinowski;Rüdiger Haug;Hassan Said;S. Piasecka;M. Kramer;C. Richert

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将长DNA链折叠成设计的纳米结构已经发展成为一门艺术。由于仅基于线性链,因此所得纳米结构不能容易地转化为共价连接的框架。在折叠DNA结构的背景下,连接链的共价键需要一种避免空间要求高的试剂或酶的稳健方法。在这里,我们报告了寡核苷酸的3′-氨基末端和5′-磷酸化伴侣链在模板反应中的化学连接,产生氨基磷酸酯键。这些反应产生与磷酸二酯等电子且在很大程度上等排的核苷酸间键。连接在三个复杂水平下进行,包括分支DNA杂交体的延伸和小折纸中六条支架链的连接。
The folding of long DNA strands into designed nanostructures has evolved into an art. Being based on linear chains only, the resulting nanostructures cannot readily be transformed into covalently linked frameworks. Covalently linking strands in the context of folded DNA structures requires a robust method that avoids sterically demanding reagents or enzymes. Here we report chemical ligation of the 3′‐amino termini of oligonucleotides and 5′‐phosphorylated partner strands in templated reactions that produce phosphoramidate linkages. These reactions produce inter‐nucleotide linkages that are isoelectronic and largely isosteric to phosphodiesters. Ligations were performed at three levels of complexity, including the extension of branched DNA hybrids and the ligation of six scaffold strands in a small origami.
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