Volume 60, Issue 52 pp. 27178-27183
Communication

Fluorinated S-Adenosylmethionine as a Reagent for Enzyme-Catalyzed Fluoromethylation

Jiaming Peng

Jiaming Peng

Department of Chemistry, University of Basel, Mattenstrasse 24a, 4002 Basel, Switzerland

These authors contributed equally to this work.

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Cangsong Liao

Cangsong Liao

Department of Chemistry, University of Basel, Mattenstrasse 24a, 4002 Basel, Switzerland

These authors contributed equally to this work.

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Carsten Bauer

Carsten Bauer

Department of Chemistry, University of Basel, Mattenstrasse 24a, 4002 Basel, Switzerland

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Florian P. Seebeck

Corresponding Author

Florian P. Seebeck

Department of Chemistry, University of Basel, Mattenstrasse 24a, 4002 Basel, Switzerland

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First published: 01 October 2021
Citations: 51

Graphical Abstract

In a biocatalytic approach to the production of fluorinated compounds, halide methyltransferases (HMTs) were found to form fluorinated S-adenosylmethionine (SAM) from S-adenosylhomocysteine and fluoromethyliodide. Although too unstable for isolation, fluorinated SAM was accepted as a substrate by C-, N- and O-specific SAM-dependent methyltransferases (MTs) to enable the fluoromethylation of small molecules (see scheme).

Abstract

Strategic replacement of protons with fluorine atoms or functional groups with fluorine-containing fragments has proven a powerful strategy to optimize the activity of therapeutic compounds. For this reason, the synthetic chemistry of organofluorides has been the subject of intense development and innovation for many years. By comparison, the literature on fluorine biocatalysis still makes for a slim chapter. Herein we introduce S-adenosylmethionine (SAM) dependent methyltransferases as a new tool for the production of fluorinated compounds. We demonstrate the ability of halide methyltransferases to form fluorinated SAM (S-adenosyl-S-(fluoromethyl)-L-homocysteine) from S-adenosylhomocysteine and fluoromethyliodide. Fluorinated SAM (F-SAM) is too unstable for isolation, but is accepted as a substrate by C-, N- and O-specific methyltransferases for enzyme-catalyzed fluoromethylation of small molecules.

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