CH391L/S13/In vitro Selection of FNAs

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Contents

Introduction

Functional nucleic acids (FNAs) are RNA, DNA, or XNA(nucleic acid analogues) that perform an activity such as binding or catalyzing a reaction. FNAs are grouped into three main categories Aptamers, Ribozymes, and Deoxyribozymes that are subdivided into either natural or artificial depending on their origin; the exception being Deoxyribozymes as they have yet to be discovered in a living organism.


Functional Nucleic Acids

[1]

In vitro Selection of Functional Nucleic Acids

Ribozymes

Deoxyribozymes

Extra

Oligonucleotides are chemically synthesized from DNA phosphoramidite monomers. Briefly, activated phosphoramidite monomers are added in the 3' to 5' direction using a cyclical activation and blocking chemistry to obtain a DNA polymer linked by phosphodiester bonds.

Image:CH391L_S12_Phosphoramidite.png

Chemical synthesis is currently limited to oligonucleotides of about 200 nt in length.

  1. Cech1982 pmid=6297745
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