Genetic alphabet expansion of DNA using unnatural base pair systems is expected to provide a wide variety of novel tools and methods. Recent rapid progress in this area has enabled the creation of several types of unnatural base pairs that function as a third base pair in polymerase reactions. Presently, a major topic is whether the genetic alphabet expansion system actually increases nucleic acid functionalities. We recently applied our unnatural base pair system to in vitro selection (SELEX), using a DNA library containing four natural bases and an unnatural base, and succeeded in the generation of high-affinity DNA aptamers that specifically bind to target proteins. Only a few hydrophobic unnatural bases greatly augmented the affinity of the aptamers. Here, we describe a new approach (genetic alphabet Ex pansion SELEX , ExSELEX), using our hydrophobic unnatural base pair system for high affinity DNA aptamer generation.
CITATION STYLE
Kimoto, M., Matsunaga, K. I., & Hirao, I. (2016). DNA aptamer generation by genetic alphabet expansion SELEX (ExSELEX) using an unnatural base pair system. In Methods in Molecular Biology (Vol. 1380, pp. 47–60). Humana Press Inc. https://doi.org/10.1007/978-1-4939-3197-2_4
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