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Expanding the Substrate Scope of N ‐ and O ‐Methyltransferases from Plants for Chemoselective Alkylation**
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Abstract
Methylation reactions are of significant interest when generating pharmaceutically active molecules and building blocks for other applications. Synthetic methylating reagents are often toxic and unselective due to their high reactivity. S ‐Adenosyl‐ l ‐methionine (SAM)‐dependent methyltransferases (MTs) present a chemoselective and environmentally friendly alternative. The anthranilate N ‐MT from Ruta graveolens ( Rg ANMT) is involved in acridone alkaloid biosynthesis, methylating anthranilate. Although it is known to methylate substrates only at the N‐ position, the closest relatives with respect to amino acid sequence similarities of over 60 % are O ‐MTs catalysing the methylation reaction of caffeate and derivatives containing only hydroxyl groups (CaOMTs). In this study, we investigated the substrate range of Rg ANMT and a CaOMT from Prunus persica ( Pp CaOMT) using compounds with both, an amino‐ and hydroxyl group (aminophenols) as possible methyl group acceptors. For both enzymes, the reaction was highly chemoselective. Furthermore, generating cofactor derivatives in situ enabled the transfer of other alkyl chains onto the aminophenols, leading to an enlarged pool of products. Selected MT reactions were performed at a preparative biocatalytic scale in in vitro and in vivo experiments resulting in yields of up to 62 %.
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Research works printed but not linked: 1
- 10.1021/bi048693 · DOI
Metadata
- Authors
- Jockmann, E., Subrizi, F., Mohr, M. K. F., Carter, E. M., Hebecker, P. M., Popadić, D., Hailes, H. C., & Andexer, J. N.
- Affiliations
- University of Freiburg (DE)
- University College London (GB)
- Corresponding author
- Andexer, Jennifer N.
- ORCID
- Venue
- ChemCatChem
- Publisher
- Wiley
- Published
- 2023-09-08
- Volume
- 15
- Issue
- 22
- ISSN
- 1867-3880 (ISSN-L)
- 1867-3899
- OpenAlex
- W4385953765
- Cited by
- 19
- References
- 44
- Citations by year
- 2026: 5 · 2025: 7 · 2024: 6 · 2023: 1
- FWCI
- 1.69
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- ChemCatChem (publishedVersion, cc-by)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
- UCL Discovery (University College London) (submittedVersion, cc-by)
- FreiDok plus (Universitätsbibliothek Freiburg) (submittedVersion)
- Funders
- Deutsche Forschungsgemeinschaft (RTG1976)
- European Research Council (716966)
- Deutsche Bundesstiftung Umwelt
- Engineering and Physical Sciences Research Council (EP/P020410/1)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Enzyme Catalysis and Immobilization
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Biochemical and biochemical processes
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant biochemistry and biosynthesis
- Keywords
- N-methyltransferase, O-methyltransferase, S-adenosylmethionine, chemoselective alkylation, Ruta graveolens, peach, aminophenols, substrate scope, plant enzymes
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