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Meeus EJ, Igareta NV, Morita I, Ward TR, de Bruin B, Reek JNH. A Co(TAML)-based artificial metalloenzyme for asymmetric radical-type oxygen atom transfer catalysis. Chem Commun (Camb) 2023; 59:14567-14570. [PMID: 37987161 DOI: 10.1039/d3cc04723g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
We show that the incorporation of a biotinylated Co(TAML) cofactor within streptavidin enables asymmetric radical-type oxygen atom transfer catalysis with improved activity and enantioselectivity.
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Affiliation(s)
- Eva J Meeus
- Van't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam (UvA), Science Park 904, Amsterdam 1098XH, The Netherlands.
| | - Nico V Igareta
- Department of Chemistry, University of Basel, Mattenstrasse 22, Basel CH-4002, Switzerland.
| | - Iori Morita
- Department of Chemistry, University of Basel, Mattenstrasse 22, Basel CH-4002, Switzerland.
| | - Thomas R Ward
- Department of Chemistry, University of Basel, Mattenstrasse 22, Basel CH-4002, Switzerland.
| | - Bas de Bruin
- Van't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam (UvA), Science Park 904, Amsterdam 1098XH, The Netherlands.
| | - Joost N H Reek
- Van't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam (UvA), Science Park 904, Amsterdam 1098XH, The Netherlands.
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Tzegai W, Reil M, Burzlaff N. Bis(4-carboxylpyrazol-1-yl)acetic acid: a scorpionate ligand for complexes with improved water solubility. Dalton Trans 2022; 51:6839-6845. [PMID: 35438696 DOI: 10.1039/d2dt00848c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bis(4-carboxylpyrazol-1-yl)acetic acid (H3bcpza) (2), obtained in a one-pot synthesis, contains carboxyl groups that differ in their pKa values. The ligand exhibits heteroscorpionate κ3-N,N,O-coordination whereupon the peripheral carboxyl groups are not involved in metal binding. The corresponding carbonyl complexes [Mn(H2bcpza)(CO)3] (4), [Re(H2bcpza)(CO)3] (5) and [Ru(H2bcpza)Cl(CO)2] (6a/6b) are partially soluble in water but readily soluble in PBS buffer.
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Affiliation(s)
- Wintana Tzegai
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Michaela Reil
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Nicolai Burzlaff
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, Egerlandstraße 1, 91058 Erlangen, Germany.
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Vornholt T, Christoffel F, Pellizzoni MM, Panke S, Ward TR, Jeschek M. Systematic engineering of artificial metalloenzymes for new-to-nature reactions. SCIENCE ADVANCES 2021; 7:eabe4208. [PMID: 33523952 DOI: 10.1126/sciadv.abe4208] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
Artificial metalloenzymes (ArMs) catalyzing new-to-nature reactions could play an important role in transitioning toward a sustainable economy. While ArMs have been created for various transformations, attempts at their genetic optimization have been case specific and resulted mostly in modest improvements. To realize their full potential, methods to rapidly discover active ArM variants for ideally any reaction of interest are required. Here, we introduce a reaction-independent, automation-compatible platform, which relies on periplasmic compartmentalization in Escherichia coli to rapidly and reliably engineer ArMs based on the biotin-streptavidin technology. We systematically assess 400 ArM mutants for five bioorthogonal transformations involving different metals, reaction mechanisms, and reactants, which include novel ArMs for gold-catalyzed hydroamination and hydroarylation. Activity enhancements up to 15-fold highlight the potential of the systematic approach. Furthermore, we suggest smart screening strategies and build machine learning models that accurately predict ArM activity from sequence, which has crucial implications for future ArM development.
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Affiliation(s)
- Tobias Vornholt
- Department of Biosystems Science and Engineering, ETH Zurich, CH-4058 Basel, Switzerland
- National Centre of Competence in Research (NCCR) Molecular Systems Engineering, Basel, Switzerland
| | - Fadri Christoffel
- National Centre of Competence in Research (NCCR) Molecular Systems Engineering, Basel, Switzerland
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, CH-4002 Basel, Switzerland
| | - Michela M Pellizzoni
- National Centre of Competence in Research (NCCR) Molecular Systems Engineering, Basel, Switzerland
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, CH-4002 Basel, Switzerland
| | - Sven Panke
- Department of Biosystems Science and Engineering, ETH Zurich, CH-4058 Basel, Switzerland
- National Centre of Competence in Research (NCCR) Molecular Systems Engineering, Basel, Switzerland
| | - Thomas R Ward
- National Centre of Competence in Research (NCCR) Molecular Systems Engineering, Basel, Switzerland
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, CH-4002 Basel, Switzerland
| | - Markus Jeschek
- Department of Biosystems Science and Engineering, ETH Zurich, CH-4058 Basel, Switzerland.
- National Centre of Competence in Research (NCCR) Molecular Systems Engineering, Basel, Switzerland
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