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论文题目: Exploring the Mutational Robustness of Nucleic Acids by Searching Genotype Neighborhoods in Sequence Space
英文论文题目: Exploring the Mutational Robustness of Nucleic Acids by Searching Genotype Neighborhoods in Sequence Space
第一作者: Zhou, QT; Sun, XB; Xia, XL; Fan, Z; Luo, ZF; Zhao, SW; Shakhnovich, E; Liang, HJ
英文第一作者: Zhou, QT; Sun, XB; Xia, XL; Fan, Z; Luo, ZF; Zhao, SW; Shakhnovich, E; Liang, HJ
联系作者: Liang, HJ (reprint author), Hefei Natl Lab Phys Sci Microscale, CAS Key Lab Soft Matter Chem,Dept Polymer Sci & E, Hefei 230026, Anhui, Peoples R China.
英文联系作者: Liang, HJ (reprint author), Hefei Natl Lab Phys Sci Microscale, CAS Key Lab Soft Matter Chem,Dept Polymer Sci & E, Hefei 230026, Anhui, Peoples R China.
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发表年度: 2017
卷: 8
期: 2
页码: 407-414
摘要: To assess the mutational robustness of nucleic acids, many genome- and protein-level studies have been performed, where nucleic acids are treated as genetic information carriers and transferrers. However, the molecular mechanisms through which mutations alter the structural, dynamic, and functional properties of nucleic acids are poorly understood. Here we performed a SELEX in silico study to investigate the fitness distribution of the L-Arm-binding aptamer genotype neighborhoods. Two novel functional genotype neighborhoods were isolated and experimentally verified to have comparable fitness as the wild-type. The experimental aptamer fitness landscape suggests the mutational robustness is strongly influenced by the local base environment and ligand-binding mode, whereas bases distant from the binding pocket provide potential evolutionary pathways to approach the global fitness maximum. Our work provides an example of successful application of SELEX in silico to optimize an aptamer and demonstrates the strong sensitivity of mutational robustness to the site of genetic variation.
英文摘要: To assess the mutational robustness of nucleic acids, many genome- and protein-level studies have been performed, where nucleic acids are treated as genetic information carriers and transferrers. However, the molecular mechanisms through which mutations alter the structural, dynamic, and functional properties of nucleic acids are poorly understood. Here we performed a SELEX in silico study to investigate the fitness distribution of the L-Arm-binding aptamer genotype neighborhoods. Two novel functional genotype neighborhoods were isolated and experimentally verified to have comparable fitness as the wild-type. The experimental aptamer fitness landscape suggests the mutational robustness is strongly influenced by the local base environment and ligand-binding mode, whereas bases distant from the binding pocket provide potential evolutionary pathways to approach the global fitness maximum. Our work provides an example of successful application of SELEX in silico to optimize an aptamer and demonstrates the strong sensitivity of mutational robustness to the site of genetic variation.
刊物名称: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
英文刊物名称: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
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学科: Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Atomic, Molecular & Chemical
英文学科: Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Atomic, Molecular & Chemical
影响因子: 9.353
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论文类别: Article
英文论文类别: Article
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