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Updated: Mar 7, 2026

Determination of In Vitro and Cellular Turn-on Kinetics for Fluorogenic RNA Aptamers
Published on: August 9, 2022
Probing the molecular determinants of fluorinase specificity
1Metabolic Engineering Research Laboratory (MERL), Science and Engineering Institutes, Agency for Science, Technology and Research (A*STAR), 31 Biopolis Way, Nanos #01-01, Singapore 138669. angel@merl.a-star.edu.sg.
Abstract:
Molecular determinants of FlA1 fluorinase specificity were probed using 5'-chloro-5'-deoxyadenosine (5'-ClDA) analogs as substrates and FlA1 active site mutants. Modifications at F213 or A279 residues are beneficial towards these modified substrates, including 5'-chloro-5'-deoxy-2-ethynyladenosine, ClDEA (>10-fold activity improvement), and conferred novel activity towards substrates not readily accepted by wild-type FlA1.
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