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Erguven M, Cornelissen NV, Peters A, Karaca E, Rentmeister A. Enzymatic Generation of Double-Modified AdoMet Analogues and Their Application in Cascade Reactions with Different Methyltransferases. Chembiochem 2022; 23:e202200511. [PMID: 36288101 PMCID: PMC10100234 DOI: 10.1002/cbic.202200511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/26/2022] [Indexed: 01/25/2023]
Abstract
Methyltransferases (MTases) have become an important tool for site-specific alkylation and biomolecular labelling. In biocatalytic cascades with methionine adenosyltransferases (MATs), transfer of functional moieties has been realized starting from methionine analogues and ATP. However, the widespread use of S-adenosyl-l-methionine (AdoMet) and the abundance of MTases accepting sulfonium centre modifications limit selective modification in mixtures. AdoMet analogues with additional modifications at the nucleoside moiety bear potential for acceptance by specific MTases. Here, we explored the generation of double-modified AdoMets by an engineered Methanocaldococcus jannaschii MAT (PC-MjMAT), using 19 ATP analogues in combination with two methionine analogues. This substrate screening was extended to cascade reactions and to MTase competition assays. Our results show that MTase targeting selectivity can be improved by using bulky substituents at the N6 of adenine. The facile access to >10 new AdoMet analogues provides the groundwork for developing MAT-MTase cascades for orthogonal biomolecular labelling.
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Affiliation(s)
- Mehmet Erguven
- Department of Chemistry and PharmacyInstitute of BiochemistryUniversity of MünsterCorrensstr. 36, 48149MünsterGermany
- Cells in Motion Interfaculty CentreUniversity of MünsterWaldeyerstraße 1548149MünsterGermany
| | - Nicolas V. Cornelissen
- Department of Chemistry and PharmacyInstitute of BiochemistryUniversity of MünsterCorrensstr. 36, 48149MünsterGermany
| | - Aileen Peters
- Department of Chemistry and PharmacyInstitute of BiochemistryUniversity of MünsterCorrensstr. 36, 48149MünsterGermany
| | - Ezgi Karaca
- Izmir Biomedicine and Genome Center35330IzmirTurkey
- Izmir International Biomedicine and Genome InstituteDokuz Eylul University, 35340 Izmir (Turkey)
| | - Andrea Rentmeister
- Department of Chemistry and PharmacyInstitute of BiochemistryUniversity of MünsterCorrensstr. 36, 48149MünsterGermany
- Cells in Motion Interfaculty CentreUniversity of MünsterWaldeyerstraße 1548149MünsterGermany
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Peters A, Herrmann E, Cornelissen NV, Klöcker N, Kümmel D, Rentmeister A. Visible-Light Removable Photocaging Groups Accepted by MjMAT Variant: Structural Basis and Compatibility with DNA and RNA Methyltransferases. Chembiochem 2022; 23:e202100437. [PMID: 34606675 PMCID: PMC9298006 DOI: 10.1002/cbic.202100437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/01/2021] [Indexed: 12/20/2022]
Abstract
Methylation and demethylation of DNA, RNA and proteins constitutes a major regulatory mechanism in epigenetic processes. Investigations would benefit from the ability to install photo-cleavable groups at methyltransferase target sites that block interactions with reader proteins until removed by non-damaging light in the visible spectrum. Engineered methionine adenosyltransferases (MATs) have been exploited in cascade reactions with methyltransferases (MTases) to modify biomolecules with non-natural groups, including first evidence for accepting photo-cleavable groups. We show that an engineered MAT from Methanocaldococcus jannaschii (PC-MjMAT) is 308-fold more efficient at converting ortho-nitrobenzyl-(ONB)-homocysteine than the wildtype enzyme. PC-MjMAT is active over a broad range of temperatures and compatible with MTases from mesophilic organisms. We solved the crystal structures of wildtype and PC-MjMAT in complex with AdoONB and a red-shifted derivative thereof. These structures reveal that aromatic stacking interactions within the ligands are key to accommodating the photocaging groups in PC-MjMAT. The enlargement of the binding pocket eliminates steric clashes to enable AdoMet analogue binding. Importantly, PC-MjMAT exhibits remarkable activity on methionine analogues with red-shifted ONB-derivatives enabling photo-deprotection of modified DNA by visible light.
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Affiliation(s)
- Aileen Peters
- Department of Chemistry and PharmacyInstitute of BiochemistryUniversity of MünsterCorrensstr. 3648149MünsterGermany
| | - Eric Herrmann
- Department of Chemistry and PharmacyInstitute of BiochemistryUniversity of MünsterCorrensstr. 3648149MünsterGermany
| | - Nicolas V. Cornelissen
- Department of Chemistry and PharmacyInstitute of BiochemistryUniversity of MünsterCorrensstr. 3648149MünsterGermany
| | - Nils Klöcker
- Department of Chemistry and PharmacyInstitute of BiochemistryUniversity of MünsterCorrensstr. 3648149MünsterGermany
| | - Daniel Kümmel
- Department of Chemistry and PharmacyInstitute of BiochemistryUniversity of MünsterCorrensstr. 3648149MünsterGermany
| | - Andrea Rentmeister
- Department of Chemistry and PharmacyInstitute of BiochemistryUniversity of MünsterCorrensstr. 3648149MünsterGermany
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Schülke KH, Ospina F, Hörnschemeyer K, Gergel S, Hammer SC. Substrate profiling of anion methyltransferases for promiscuous synthesis of S-adenosylmethionine analogs from haloalkanes. Chembiochem 2021; 23:e202100632. [PMID: 34927779 PMCID: PMC9303522 DOI: 10.1002/cbic.202100632] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/18/2021] [Indexed: 11/06/2022]
Abstract
Biocatalytic alkylation reactions can be performed with high chemo-, regio- and stereoselectivity using S -adenosyl-l-methionine (SAM)-dependent methyltransferases (MTs) and SAM analogs. Currently, however, this methodology is limited in application due to the rather laborious protocols to access SAM analogs. It has recently been shown that halide methyltransferases (HMTs) enable synthesis and recycling of SAM analogs with readily available haloalkanes as starting material. Here we expand this work by using substrate profiling of the anion MT enzyme family to explore promiscuous SAM analog synthesis. Our study shows that anion MTs are in general very promiscuous with respect to the alkyl chain as well as the halide leaving group. Substrate profiling further suggests that promiscuous anion MTs cluster in sequence space. Next to iodoalkanes, cheaper, less toxic and more available bromoalkanes have been converted and several haloalkanes bearing short alkyl groups, alkyl rings, and functional groups such as alkene, alkyne and aromatic moieties are accepted as substrates. Further, we applied the SAM analogs as electrophiles in enzyme-catalyzed regioselective pyrazole allylation with 3-bromopropene as starting material.
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Affiliation(s)
- Kai H Schülke
- Universität Bielefeld: Universitat Bielefeld, Fakultät für Chemie, GERMANY
| | - Felipe Ospina
- Universität Bielefeld: Universitat Bielefeld, Fakultät für Chemie, GERMANY
| | | | - Sebastian Gergel
- Universität Bielefeld: Universitat Bielefeld, Fakultät für Chemie, GERMANY
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Bengel LL, Aberle B, Egler-Kemmerer AN, Kienzle S, Hauer B, Hammer SC. Engineered Enzymes Enable Selective N-Alkylation of Pyrazoles With Simple Haloalkanes. Angew Chem Int Ed Engl 2021; 60:5554-5560. [PMID: 33300646 PMCID: PMC7986378 DOI: 10.1002/anie.202014239] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 12/01/2020] [Indexed: 01/06/2023]
Abstract
Selective alkylation of pyrazoles could solve a challenge in chemistry and streamline synthesis of important molecules. Here we report catalyst‐controlled pyrazole alkylation by a cyclic two‐enzyme cascade. In this enzymatic system, a promiscuous enzyme uses haloalkanes as precursors to generate non‐natural analogs of the common cosubstrate S‐adenosyl‐l‐methionine. A second engineered enzyme transfers the alkyl group in highly selective C−N bond formations to the pyrazole substrate. The cosubstrate is recycled and only used in catalytic amounts. Key is a computational enzyme‐library design tool that converted a promiscuous methyltransferase into a small enzyme family of pyrazole‐alkylating enzymes in one round of mutagenesis and screening. With this enzymatic system, pyrazole alkylation (methylation, ethylation, propylation) was achieved with unprecedented regioselectivity (>99 %), regiodivergence, and in a first example on preparative scale.
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Affiliation(s)
- Ludwig L Bengel
- Department of Technical Biochemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
| | - Benjamin Aberle
- Department of Technical Biochemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
| | - Alexander-N Egler-Kemmerer
- Department of Technical Biochemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
| | - Samuel Kienzle
- Department of Technical Biochemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
| | - Bernhard Hauer
- Department of Technical Biochemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
| | - Stephan C Hammer
- Faculty of Chemistry, Organic Chemistry and Biocatalysis, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld, Germany.,Department of Technical Biochemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
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Bengel LL, Aberle B, Egler‐Kemmerer A, Kienzle S, Hauer B, Hammer SC. Modifizierte Enzyme ermöglichen die selektive
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‐Alkylierung von Pyrazolen unter Verwendung einfacher Halogenalkane. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014239] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ludwig L. Bengel
- Abteilung für Technische Biochemie Institut für Biochemie und Technische Biochemie Universität Stuttgart Allmandring 31 70569 Stuttgart Deutschland
| | - Benjamin Aberle
- Abteilung für Technische Biochemie Institut für Biochemie und Technische Biochemie Universität Stuttgart Allmandring 31 70569 Stuttgart Deutschland
| | - Alexander‐N. Egler‐Kemmerer
- Abteilung für Technische Biochemie Institut für Biochemie und Technische Biochemie Universität Stuttgart Allmandring 31 70569 Stuttgart Deutschland
| | - Samuel Kienzle
- Abteilung für Technische Biochemie Institut für Biochemie und Technische Biochemie Universität Stuttgart Allmandring 31 70569 Stuttgart Deutschland
| | - Bernhard Hauer
- Abteilung für Technische Biochemie Institut für Biochemie und Technische Biochemie Universität Stuttgart Allmandring 31 70569 Stuttgart Deutschland
| | - Stephan C. Hammer
- Fakultät Chemie Organische Chemie und Biokatalyse Universität Bielefeld Universitätsstraße 25 33615 Bielefeld Deutschland
- Abteilung für Technische Biochemie Institut für Biochemie und Technische Biochemie Universität Stuttgart Allmandring 31 70569 Stuttgart Deutschland
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