文章基本信息

标题：Backbone-free duplex-stacked monomer nucleic acids exhibiting Watson–Crick selectivity
本地全文：下载
作者：Gregory P. Smith ; Tommaso P. Fraccia ; Marco Todisco 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2018
卷号：115
期号：33
页码：E7658-E7664
DOI：10.1073/pnas.1721369115
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：We demonstrate that nucleic acid (NA) mononucleotide triphosphates (dNTPs and rNTPs), at sufficiently high concentration and low temperature in aqueous solution, can exhibit a phase transition in which chromonic columnar liquid crystal ordering spontaneously appears. Remarkably, this polymer-free state exhibits, in a self-assembly of NA monomers, the key structural elements of biological nucleic acids, including: long-ranged duplex stacking of base pairs, complementarity-dependent partitioning of molecules, and Watson–Crick selectivity, such that, among all solutions of adenosine, cytosine, guanine, and thymine NTPs and their binary mixtures, duplex columnar ordering is most stable in the A-T and C-G combinations.
关键词：nucleic acid ; nucleoside triphosphate ; liquid crystal ; double helix ; prebiotic evolution