A biomolecule-compatible visible-light-induced azide reduction from a DNA-encoded reaction-discovery system
作者:Yiyun Chen、Adam S. Kamlet、Jonathan B. Steinman、David R. Liu
DOI:10.1038/nchem.932
日期:2011.2
Using a system that accelerates the serendipitous discovery of new reactions by evaluating hundreds of DNA-encoded substrate combinations in a single experiment, we explored a broad range of reaction conditions for new bond-forming reactions. We discovered reactivity that led to a biomolecule-compatible, Ru(II)-catalysed azide-reduction reaction induced by visible light. In contrast to current azide-reduction methods, this reaction is highly chemoselective and is compatible with alcohols, phenols, acids, alkenes, alkynes, aldehydes, alkyl halides, alkyl mesylates and disulfides. The remarkable functional group compatibility and mild conditions of the reaction enabled the azide reduction of nucleic acid and oligosaccharide substrates, with no detectable occurrence of side reactions. The reaction was also performed in the presence of a protein enzyme without the loss of enzymatic activity, in contrast to two commonly used azide-reduction methods. The visible-light dependence of this reaction provides a means of photouncaging functional groups, such as amines and carboxylates, on biological macromolecules without using ultraviolet irradiation. A DNA-encoded reaction discovery system has revealed reactivity that led to the development of a visible-light-induced, biomolecule-compatible azide reduction. This reaction exhibits remarkable chemoselectivity and can be performed on oligonucleotide and oligosaccharide substrates, and in the presence of a protein enzyme, without undesired side reactions or loss of enzyme activity.
利用一个通过单次实验评估数百种DNA编码底物组合来加速偶发发现新反应的系统,我们探索了大量反应条件用于形成新键的反应。我们发现了一种与生物分子兼容的、由可见光诱导的、以Ru(II)为催化剂的叠氮化物还原反应。与目前的叠氮化物还原方法相比,该反应具有高度的化学选择性,并且与醇、酚、酸、烯烃、炔烃、醛、烷基卤化物、烷基甲磺酸酯和二硫化物等官能团兼容。该反应出色的官能团兼容性和温和的条件使得能够对核酸和寡糖底物进行叠氮化物还原,且没有检测到副反应的发生。与两种常用的叠氮化物还原方法不同,该反应在存在蛋白质酶的情况下进行,且没有失去酶活性。该反应对可见光的依赖性提供了一种在不使用紫外线照射的情况下对生物大分子上的功能团(如胺和羧酸盐)进行光控释放的方法。DNA编码的反应发现系统揭示了导致发展可见光诱导的、与生物分子兼容的叠氮化物还原反应的活性。该反应表现出卓越的化学选择性,并且可以在寡核苷酸和寡糖底物上进行,并且在存在蛋白质酶的情况下,没有不希望的副反应或酶活性的损失。