Nonequilibrium Hybridization Enables Discrimination of a Point Mutation within 5-40 °C.

Nonequilibrium Hybridization Enables Discrimination of a Point Mutation within 5-40 °C.
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DOI:
10.1021/jacs.6b05628
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发表时间:
2016-10-19
影响因子:
15
通讯作者:
Kolpashchikov DM
Kolpashchikov DM
中科院分区:
化学1区
文献类型:
--
作者:
Stancescu M;Fedotova TA;Hooyberghs J;Balaeff A;Kolpashchikov DM

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DNA和RNA中的点突变和单核苷酸多态性的检测在生物学、生物技术和医学中具有日益增长的重要性。对于手头的应用,经常使用杂交测定。传统上,它们仅在高温(>40 °C)和窄间隔(ΔT = 1-10 °C)下区分点突变。目前的研究表明,特别设计的多链DNA探针可以在5-40 °C范围内区分点突变。这种前所未有的宽的环境温度范围是通过(i)非平衡杂交条件和(ii)相对于完全匹配的复合物的平衡时间的失配诱导的增加的受控组合实现的,我们称之为“动力学反转”。
Detection of point mutations and single nucleotide polymorphisms in DNA and RNA has a growing importance in biology, biotechnology, and medicine. For the application at hand, hybridization assays are often used. Traditionally, they differentiate point mutations only at elevated temperatures (>40 °C) and in narrow intervals (ΔT = 1–10 °C). The current study demonstrates that a specially designed multistranded DNA probe can differentiate point mutations in the range of 5–40 °C. This unprecedentedly broad ambient-temperature range is enabled by a controlled combination of (i) nonequilibrium hybridization conditions and (ii) a mismatch-induced increase of equilibration time in respect to that of a fully matched complex, which we dub “kinetic inversion”.
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