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Abstract
The recently delineated structure- and reactivity-based concept of antivitamins B12 has begun to bear fruit by the generation, and study, of a range of such B12 -dummies, either vitamin B12 -derived, or transition metal analogues that also represent potential antivitamins B12 or specific B12 -antimetabolites. As reviewed here, this has opened up new research avenues in organometallic B12 -chemistry and bioinorganic coordination chemistry. Exploratory studies with antivitamins B12 have, furthermore, revealed some of their potential, as pharmacologically interesting compounds, for inducing B12 -deficiency in a range of organisms, from hospital resistant bacteria to laboratory mice. The derived capacity of antivitamins B12 to induce functional B12 -deficiency in mammalian cells and organs also suggest their valuable potential as growth inhibitors of cancerous human and animal cells.
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Affiliation(s)
- Bernhard Kräutler
- Institute of Organic Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
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2
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Kieninger C, Wurst K, Podewitz M, Stanley M, Deery E, Lawrence AD, Liedl KR, Warren MJ, Kräutler B. Replacement of the Cobalt Center of Vitamin B
12
by Nickel: Nibalamin and Nibyric Acid Prepared from Metal‐Free B
12
Ligands Hydrogenobalamin and Hydrogenobyric Acid. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Christoph Kieninger
- Institute of Organic Chemistry University of Innsbruck 6020 Innsbruck Austria
- Center for Molecular Biosciences (CMBI) University of Innsbruck 6020 Innsbruck Austria
| | - Klaus Wurst
- Institute of General Inorganic and Theoretical Chemistry University of Innsbruck 6020 Innsbruck Austria
| | - Maren Podewitz
- Center for Molecular Biosciences (CMBI) University of Innsbruck 6020 Innsbruck Austria
- Institute of General Inorganic and Theoretical Chemistry University of Innsbruck 6020 Innsbruck Austria
| | - Maria Stanley
- School of Biosciences University of Kent Canterbury CT2 7NJ UK
| | - Evelyne Deery
- School of Biosciences University of Kent Canterbury CT2 7NJ UK
| | | | - Klaus R. Liedl
- Center for Molecular Biosciences (CMBI) University of Innsbruck 6020 Innsbruck Austria
- Institute of General Inorganic and Theoretical Chemistry University of Innsbruck 6020 Innsbruck Austria
| | - Martin J. Warren
- School of Biosciences University of Kent Canterbury CT2 7NJ UK
- Quadram Institute Bioscience Norwich Science Park Norwich NR4 7UQ UK
| | - Bernhard Kräutler
- Institute of Organic Chemistry University of Innsbruck 6020 Innsbruck Austria
- Center for Molecular Biosciences (CMBI) University of Innsbruck 6020 Innsbruck Austria
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3
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Kieninger C, Wurst K, Podewitz M, Stanley M, Deery E, Lawrence AD, Liedl KR, Warren MJ, Kräutler B. Replacement of the Cobalt Center of Vitamin B 12 by Nickel: Nibalamin and Nibyric Acid Prepared from Metal-Free B 12 Ligands Hydrogenobalamin and Hydrogenobyric Acid. Angew Chem Int Ed Engl 2020; 59:20129-20136. [PMID: 32686888 PMCID: PMC7693184 DOI: 10.1002/anie.202008407] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Indexed: 12/18/2022]
Abstract
The (formal) replacement of Co in cobalamin (Cbl) by NiII generates nibalamin (Nibl), a new transition-metal analogue of vitamin B12 . Described here is Nibl, synthesized by incorporation of a NiII ion into the metal-free B12 ligand hydrogenobalamin (Hbl), itself prepared from hydrogenobyric acid (Hby). The related NiII corrin nibyric acid (Niby) was similarly synthesized from Hby, the metal-free cobyric acid ligand. The solution structures of Hbl, and Niby and Nibl, were characterized by spectroscopic studies. Hbl features two inner protons bound at N2 and N4 of the corrin ligand, as discovered in Hby. X-ray analysis of Niby shows the structural adaptation of the corrin ligand to NiII ions and the coordination behavior of NiII . The diamagnetic Niby and Nibl, and corresponding isoelectronic CoI corrins, were deduced to be isostructural. Nibl is a structural mimic of four-coordinate base-off Cbls, as verified by its ability to act as a strong inhibitor of bacterial adenosyltransferase.
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Affiliation(s)
- Christoph Kieninger
- Institute of Organic ChemistryUniversity of Innsbruck6020InnsbruckAustria
- Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
| | - Klaus Wurst
- Institute of GeneralInorganic and Theoretical ChemistryUniversity of Innsbruck6020InnsbruckAustria
| | - Maren Podewitz
- Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
- Institute of GeneralInorganic and Theoretical ChemistryUniversity of Innsbruck6020InnsbruckAustria
| | - Maria Stanley
- School of BiosciencesUniversity of KentCanterburyCT2 7NJUK
| | - Evelyne Deery
- School of BiosciencesUniversity of KentCanterburyCT2 7NJUK
| | | | - Klaus R. Liedl
- Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
- Institute of GeneralInorganic and Theoretical ChemistryUniversity of Innsbruck6020InnsbruckAustria
| | - Martin J. Warren
- School of BiosciencesUniversity of KentCanterburyCT2 7NJUK
- Quadram Institute BioscienceNorwich Science ParkNorwichNR4 7UQUK
| | - Bernhard Kräutler
- Institute of Organic ChemistryUniversity of Innsbruck6020InnsbruckAustria
- Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
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4
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Kieninger C, Baker JA, Podewitz M, Wurst K, Jockusch S, Lawrence AD, Deery E, Gruber K, Liedl KR, Warren MJ, Kräutler B. Zinc Substitution of Cobalt in Vitamin B 12: Zincobyric acid and Zincobalamin as Luminescent Structural B 12‐Mimics. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908428] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Christoph Kieninger
- Institute of Organic Chemistry and Center for Molecular Biosciences (CMBI) University of Innsbruck 6020 Innsbruck Austria
| | - Joseph A. Baker
- School of Biosciences University of Kent Canterbury CT2 7NJ UK
| | - Maren Podewitz
- Institute of General, Inorganic and Theoretical Chemistry and Center for Molecular Biosciences (CMBI) University of Innsbruck 6020 Innsbruck Austria
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry and Center for Molecular Biosciences (CMBI) University of Innsbruck 6020 Innsbruck Austria
| | | | | | - Evelyne Deery
- School of Biosciences University of Kent Canterbury CT2 7NJ UK
| | - Karl Gruber
- Institute for Molecular Biosciences University of Graz Austria
| | - Klaus R. Liedl
- Institute of General, Inorganic and Theoretical Chemistry and Center for Molecular Biosciences (CMBI) University of Innsbruck 6020 Innsbruck Austria
| | | | - Bernhard Kräutler
- Institute of Organic Chemistry and Center for Molecular Biosciences (CMBI) University of Innsbruck 6020 Innsbruck Austria
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5
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Kieninger C, Baker JA, Podewitz M, Wurst K, Jockusch S, Lawrence AD, Deery E, Gruber K, Liedl KR, Warren MJ, Kräutler B. Zinc Substitution of Cobalt in Vitamin B 12 : Zincobyric acid and Zincobalamin as Luminescent Structural B 12 -Mimics. Angew Chem Int Ed Engl 2019; 58:14568-14572. [PMID: 31420932 PMCID: PMC6790578 DOI: 10.1002/anie.201908428] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Indexed: 11/14/2022]
Abstract
Replacing the central cobalt ion of vitamin B12 by other metals has been a long-held aspiration within the B12 -field. Herein, we describe the synthesis from hydrogenobyric acid of zincobyric acid (Znby) and zincobalamin (Znbl), the Zn-analogues of the natural cobalt-corrins cobyric acid and vitamin B12 , respectively. The solution structures of Znby and Znbl were studied by NMR-spectroscopy. Single crystals of Znby were produced, providing the first X-ray crystallographic structure of a zinc corrin. The structures of Znby and of computationally generated Znbl were found to resemble the corresponding CoII -corrins, making such Zn-corrins potentially useful for investigations of B12 -dependent processes. The singlet excited state of Znby had a short life-time, limited by rapid intersystem crossing to the triplet state. Znby allowed the unprecedented observation of a corrin triplet (ET =190 kJ mol-1 ) and was found to be an excellent photo-sensitizer for 1 O2 (ΦΔ =0.70).
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Affiliation(s)
- Christoph Kieninger
- Institute of Organic Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
| | | | - Maren Podewitz
- Institute of General, Inorganic and Theoretical Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
| | | | | | - Evelyne Deery
- School of BiosciencesUniversity of KentCanterburyCT2 7NJUK
| | - Karl Gruber
- Institute for Molecular BiosciencesUniversity ofGrazAustria
| | - Klaus R. Liedl
- Institute of General, Inorganic and Theoretical Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
| | | | - Bernhard Kräutler
- Institute of Organic Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
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6
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Oohora K, Miyazaki Y, Hayashi T. Myoglobin Reconstituted with Ni Tetradehydrocorrin as a Methane‐Generating Model of Methyl‐coenzyme M Reductase. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907584] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Koji Oohora
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita 565-0871 Japan
- Frontier Research Base for Global Young Researchers Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita 565-0871 Japan
| | - Yuta Miyazaki
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita 565-0871 Japan
| | - Takashi Hayashi
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita 565-0871 Japan
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7
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Oohora K, Miyazaki Y, Hayashi T. Myoglobin Reconstituted with Ni Tetradehydrocorrin as a Methane-Generating Model of Methyl-coenzyme M Reductase. Angew Chem Int Ed Engl 2019; 58:13813-13817. [PMID: 31347228 DOI: 10.1002/anie.201907584] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/20/2019] [Indexed: 11/05/2022]
Abstract
Myoglobin reconstituted with Ni tetradehydrocorrin was investigated as a model of F430-containing methyl-coenzyme M reductase, which catalyzes anaerobic methane generation. The NiII tetradehydrocorrin complex has a NiII /NiI redox potential of -0.34 V vs. SHE and EPR spectroscopy indicates the formation of a NiI species upon reduction by dithionite. This redox potential is approximately 0.31 V more positive than that of F430. The NiI tetradehydrocorrin moiety is bound to the apo-form of myoglobin to yield the reconstituted protein. Methane gas is generated in the reaction of the model with methyl iodide in the presence of the reconstituted protein under reductive conditions, whereas the NiI complex itself does not produce methane gas. This is the first example of a protein-based functional model of F430-containing methyl-coenzyme M reductase.
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Affiliation(s)
- Koji Oohora
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Japan.,Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Japan
| | - Yuta Miyazaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Japan
| | - Takashi Hayashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Japan
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8
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Kieninger C, Deery E, Lawrence AD, Podewitz M, Wurst K, Nemoto-Smith E, Widner FJ, Baker JA, Jockusch S, Kreutz CR, Liedl KR, Gruber K, Warren MJ, Kräutler B. The Hydrogenobyric Acid Structure Reveals the Corrin Ligand as an Entatic State Module Empowering B 12 Cofactors for Catalysis. Angew Chem Int Ed Engl 2019; 58:10756-10760. [PMID: 31115943 PMCID: PMC6771967 DOI: 10.1002/anie.201904713] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Indexed: 11/09/2022]
Abstract
The B12 cofactors instill a natural curiosity regarding the primordial selection and evolution of their corrin ligand. Surprisingly, this important natural macrocycle has evaded molecular scrutiny, and its specific role in predisposing the incarcerated cobalt ion for organometallic catalysis has remained obscure. Herein, we report the biosynthesis of the cobalt-free B12 corrin moiety, hydrogenobyric acid (Hby), a compound crafted through pathway redesign. Detailed insights from single-crystal X-ray and solution structures of Hby have revealed a distorted helical cavity, redefining the pattern for binding cobalt ions. Consequently, the corrin ligand coordinates cobalt ions in desymmetrized "entatic" states, thereby promoting the activation of B12 -cofactors for their challenging chemical transitions. The availability of Hby also provides a route to the synthesis of transition metal analogues of B12 .
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Affiliation(s)
- Christoph Kieninger
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, 6020, Innsbruck, Austria
| | - Evelyne Deery
- School of Biosciences, University of Kent, Canterbury, CT2 7NJ, UK
| | | | - Maren Podewitz
- Institute of General, Inorganic and Theoretical Chemistry, and Center for Molecular Biosciences (CMBI), University of Innsbruck, 6020, Innsbruck, Austria
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry, and Center for Molecular Biosciences (CMBI), University of Innsbruck, 6020, Innsbruck, Austria
| | - Emi Nemoto-Smith
- School of Biosciences, University of Kent, Canterbury, CT2 7NJ, UK
| | - Florian J Widner
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, 6020, Innsbruck, Austria
| | - Joseph A Baker
- School of Biosciences, University of Kent, Canterbury, CT2 7NJ, UK
| | | | - Christoph R Kreutz
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, 6020, Innsbruck, Austria
| | - Klaus R Liedl
- Institute of General, Inorganic and Theoretical Chemistry, and Center for Molecular Biosciences (CMBI), University of Innsbruck, 6020, Innsbruck, Austria
| | - Karl Gruber
- Institute for Molecular Biosciences, University of Graz, Austria
| | - Martin J Warren
- School of Biosciences, University of Kent, Canterbury, CT2 7NJ, UK
| | - Bernhard Kräutler
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, 6020, Innsbruck, Austria
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9
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Kieninger C, Deery E, Lawrence AD, Podewitz M, Wurst K, Nemoto‐Smith E, Widner FJ, Baker JA, Jockusch S, Kreutz CR, Liedl KR, Gruber K, Warren MJ, Kräutler B. Die Hydrogenobyrsäure‐Struktur enthüllt den Corrin‐Liganden als entatisches Zustandsmodul zur Steigerung der Katalyseaktivität von B
12
‐Cofaktoren. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904713] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Christoph Kieninger
- Institute of Organic Chemistry and Center for Molecular BiosciencesUniversity of Innsbruck 6020 Innsbruck Österreich
| | - Evelyne Deery
- School of BiosciencesUniversity of Kent Canterbury CT2 7NJ Großbritannien
| | - Andrew D. Lawrence
- School of BiosciencesUniversity of Kent Canterbury CT2 7NJ Großbritannien
| | - Maren Podewitz
- Institute of General, Inorganic and Theoretical Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck 6020 Innsbruck Österreich
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck 6020 Innsbruck Österreich
| | - Emi Nemoto‐Smith
- School of BiosciencesUniversity of Kent Canterbury CT2 7NJ Großbritannien
| | - Florian J. Widner
- Institute of Organic Chemistry and Center for Molecular BiosciencesUniversity of Innsbruck 6020 Innsbruck Österreich
| | - Joseph A. Baker
- School of BiosciencesUniversity of Kent Canterbury CT2 7NJ Großbritannien
| | | | - Christoph R. Kreutz
- Institute of Organic Chemistry and Center for Molecular BiosciencesUniversity of Innsbruck 6020 Innsbruck Österreich
| | - Klaus R. Liedl
- Institute of General, Inorganic and Theoretical Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck 6020 Innsbruck Österreich
| | - Karl Gruber
- Institute for Molecular BiosciencesUniversity of Graz Österreich
| | - Martin J. Warren
- School of BiosciencesUniversity of Kent Canterbury CT2 7NJ Großbritannien
| | - Bernhard Kräutler
- Institute of Organic Chemistry and Center for Molecular BiosciencesUniversity of Innsbruck 6020 Innsbruck Österreich
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