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Dangi V, Kandhal J, Gupta A, Baral M, Kanungo BK. Pyrogallol-based dipodal optical probe as new smart analytical tool for sustainable detection of cobalt in biosystem. Methods 2023; 220:79-89. [PMID: 37956725 DOI: 10.1016/j.ymeth.2023.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/07/2023] [Accepted: 11/10/2023] [Indexed: 11/15/2023] Open
Abstract
The present research focuses on the micro-level detection of cobalt ions in biological and environmental samples using a new probe. The probe is a multifunctional symmetrical dipodal molecule with two pyrogallol binding units attached to the malonate scaffold through a propylene spacer. It was synthesized and characterized by 1H NMR, 13C NMR, IR, electronic spectroscopy, and mass spectrometry. The molecule's binding, thermodynamic, and photophysical properties are also described. The designed probe demonstrates an excellent sensing ability for Co(II) based on the ESIPT "OFF-ON" fluorescence mechanism. The experiments explore the high selectivity of the ligand for cobalt sensing over a wide range of metal ions of biological and environmental importance. The fluorescence intensity shows a linear response to Co(II) in 5-100 μM concentration with a detection limit of 8.75 x 10-5 and a 2.65-fold enhancement in the intensity. These results establish its potential application as a fluorescence sensor. The probe is also employed as a colorimetric sensor for the qualitative determination of cobalt ions in DMSO solution. The interesting behavior of the probe motivated us further to study its coordination properties with divalent cobalt in solution. The pre-organized assembly with an appropriate cavity size favors the ligand for an efficient Co(II) encapsulation by coordinating through imine-Ns and aromatic ring-Os donors, giving high formation constants.
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Affiliation(s)
- Vijay Dangi
- Department of Chemistry, National Institute of Technology, Kurukshetra, Haryana 136119, India
| | - Jyoti Kandhal
- Department of Chemistry, National Institute of Technology, Kurukshetra, Haryana 136119, India
| | - Amit Gupta
- Department of Chemistry, Dronacharya Govt. College, Gurgaon 122001, India
| | - Minati Baral
- Department of Chemistry, National Institute of Technology, Kurukshetra, Haryana 136119, India.
| | - B K Kanungo
- Department of Chemistry, Sant Longowal Insititute of Engineering & Technology, Punjab, India
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2
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Dereven'kov IA, Osokin VS, Khodov IA, Sobornova VV, Ershov NA, Makarov SV. meso-Bromination of cyano- and aquacobalamins facilitates their processing into Co(II)-species by glutathione. J Biol Inorg Chem 2023; 28:571-581. [PMID: 37479902 DOI: 10.1007/s00775-023-02009-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 07/05/2023] [Indexed: 07/23/2023]
Abstract
Cyanocobalamin (CNCbl), a medicinal form of vitamin B12, is resistant to glutathione (GSH), and undergoes intracellular processing via reductive decyanation producing the Co(II)-form of Cbl (Cbl(II)) mediated by the CblC-protein. Alteration of the CblC-protein structure might inhibit CNCbl processing. Here, we showed that introducing a bromine atom to the C10-position of the CNCbl corrin ring facilitates its reaction with GSH leading to the formation of Cbl(II) and cyanide dissociation. In a neutral medium, the reaction between C10-Br-CNCbl and GSH proceeds via the complexation of the reactants further leading to dimethylbenzimidazole (DMBI) substitution and electron transfer from GSH to the Co(III)-ion. The reaction is accelerated upon the GSH thiol group deprotonation. The key factors explaining the higher reactivity of C10-Br-CNCbl compared with unmodified CNCbl towards GSH are increasing the electrode potential of CNCbl two-electron reduction upon meso-bromination and the substantial labilization of DMBI, which was shown by comparing their reactions with cyanide and the pKa values of DMBI protonation (pKa base-off). Aquacobalamin (H2OCbl) brominated at the C10-position of the corrin reacts with GSH to give Cbl(II) via GSH complexation and subsequent reaction of this complex with a second GSH molecule, whereas unmodified H2OCbl generates glutathionyl-Cbl, which is resistant to further reduction by GSH.
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Affiliation(s)
- Ilia A Dereven'kov
- Department of Food Chemistry, Ivanovo State University of Chemistry and Technology, Sheremetevskiy Str. 7, 153000, Ivanovo, Russia.
| | - Vladimir S Osokin
- Department of Food Chemistry, Ivanovo State University of Chemistry and Technology, Sheremetevskiy Str. 7, 153000, Ivanovo, Russia
| | - Ilya A Khodov
- G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, 153045, Ivanovo, Russia
| | - Valentina V Sobornova
- G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, 153045, Ivanovo, Russia
| | - Nikita A Ershov
- Department of Food Chemistry, Ivanovo State University of Chemistry and Technology, Sheremetevskiy Str. 7, 153000, Ivanovo, Russia
| | - Sergei V Makarov
- Department of Food Chemistry, Ivanovo State University of Chemistry and Technology, Sheremetevskiy Str. 7, 153000, Ivanovo, Russia
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3
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Lennon SR, Wierzba AJ, Siwik SH, Gryko D, Palmer AE, Batey RT. Targeting Riboswitches with Beta-Axial-Substituted Cobalamins. ACS Chem Biol 2023; 18:1136-1147. [PMID: 37094176 PMCID: PMC10395008 DOI: 10.1021/acschembio.2c00939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
RNA-targeting small-molecule therapeutics is an emerging field hindered by an incomplete understanding of the basic principles governing RNA-ligand interactions. One way to advance our knowledge in this area is to study model systems where these interactions are better understood, such as riboswitches. Riboswitches bind a wide array of small molecules with high affinity and selectivity, providing a wealth of information on how RNA recognizes ligands through diverse structures. The cobalamin-sensing riboswitch is a particularly useful model system, as similar sequences show highly specialized binding preferences for different biological forms of cobalamin. This riboswitch is also widely dispersed across bacteria and therefore holds strong potential as an antibiotic target. Many synthetic cobalamin forms have been developed for various purposes including therapeutics, but their interaction with cobalamin riboswitches is yet to be explored. In this study, we characterize the interactions of 11 cobalamin derivatives with three representative cobalamin riboswitches using in vitro binding experiments (both chemical footprinting and a fluorescence-based assay) and a cell-based reporter assay. The derivatives show productive interactions with two of the three riboswitches, demonstrating simultaneous plasticity and selectivity within these RNAs. The observed plasticity is partially achieved through a novel structural rearrangement within the ligand binding pocket, providing insight into how similar RNA structures can be targeted. As the derivatives also show in vivo functionality, they serve as several potential lead compounds for further drug development.
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Affiliation(s)
- Shelby R. Lennon
- Department of Biochemistry, University of Colorado, Boulder, CO 80309-0596, USA
| | - Aleksandra J. Wierzba
- Department of Biochemistry, University of Colorado, Boulder, CO 80309-0596, USA
- BioFrontiers Institute, University of Colorado, Boulder, CO 80303 – 0596, USA
| | - Shea H. Siwik
- Department of Biochemistry, University of Colorado, Boulder, CO 80309-0596, USA
| | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Amy E. Palmer
- Department of Biochemistry, University of Colorado, Boulder, CO 80309-0596, USA
- BioFrontiers Institute, University of Colorado, Boulder, CO 80303 – 0596, USA
| | - Robert T. Batey
- Department of Biochemistry, University of Colorado, Boulder, CO 80309-0596, USA
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4
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Marques HM. The inorganic chemistry of the cobalt corrinoids - an update. J Inorg Biochem 2023; 242:112154. [PMID: 36871417 DOI: 10.1016/j.jinorgbio.2023.112154] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 01/23/2023] [Accepted: 01/26/2023] [Indexed: 02/05/2023]
Abstract
The inorganic chemistry of the cobalt corrinoids, derivatives of vitamin B12, is reviewed, with particular emphasis on equilibrium constants for, and kinetics of, their axial ligand substitution reactions. The role the corrin ligand plays in controlling and modifying the properties of the metal ion is emphasised. Other aspects of the chemistry of these compounds, including their structure, corrinoid complexes with metals other than cobalt, the redox chemistry of the cobalt corrinoids and their chemical redox reactions, and their photochemistry are discussed. Their role as catalysts in non-biological reactions and aspects of their organometallic chemistry are briefly mentioned. Particular mention is made of the role that computational methods - and especially DFT calculations - have played in developing our understanding of the inorganic chemistry of these compounds. A brief overview of the biological chemistry of the B12-dependent enzymes is also given for the reader's convenience.
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Affiliation(s)
- Helder M Marques
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa.
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5
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Cobalamin Riboswitches Are Broadly Sensitive to Corrinoid Cofactors to Enable an Efficient Gene Regulatory Strategy. mBio 2022; 13:e0112122. [PMID: 35993747 PMCID: PMC9600662 DOI: 10.1128/mbio.01121-22] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
In bacteria, many essential metabolic processes are controlled by riboswitches, gene regulatory RNAs that directly bind and detect metabolites. Highly specific effector binding enables riboswitches to respond to a single biologically relevant metabolite. Cobalamin riboswitches are a potential exception because over a dozen chemically similar but functionally distinct cobalamin variants (corrinoid cofactors) exist in nature. Here, we measured cobalamin riboswitch activity in vivo using a Bacillus subtilis fluorescent reporter system and found, among 38 tested riboswitches, a subset responded to corrinoids promiscuously, while others were semiselective. Analyses of chimeric riboswitches and structural models indicate, unlike other riboswitch classes, cobalamin riboswitches indirectly differentiate among corrinoids by sensing differences in their structural conformation. This regulatory strategy aligns riboswitch-corrinoid specificity with cellular corrinoid requirements in a B. subtilis model. Thus, bacteria can employ broadly sensitive riboswitches to cope with the chemical diversity of essential metabolites. IMPORTANCE Some bacterial mRNAs contain a region called a riboswitch which controls gene expression by binding to a metabolite in the cell. Typically, riboswitches sense and respond to a limited range of cellular metabolites, often just one type. In this work, we found the cobalamin (vitamin B12) riboswitch class is an exception, capable of sensing and responding to multiple variants of B12-collectively called corrinoids. We found cobalamin riboswitches vary in corrinoid specificity with some riboswitches responding to each of the corrinoids we tested, while others responding only to a subset of corrinoids. Our results suggest the latter class of riboswitches sense intrinsic conformational differences among corrinoids in order to support the corrinoid-specific needs of the cell. These findings provide insight into how bacteria sense and respond to an exceptionally diverse, often essential set of enzyme cofactors.
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6
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Brenig C, Mestizo PD, Zelder F. Functionalisation of vitamin B 12 derivatives with a cobalt β-phenyl ligand boosters antimetabolite activity in bacteria. RSC Adv 2022; 12:28553-28559. [PMID: 36320527 PMCID: PMC9541496 DOI: 10.1039/d2ra05748d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 09/27/2022] [Indexed: 11/06/2022] Open
Abstract
This study describes the syntheses of four singly- and two doubly-modified vitamin B12 derivatives for generating antimetabolites of Lactobacillus delbrueckii (L. delbrueckii). The two most potent antagonists, a Coβ-phenyl-cobalamin-c,8-lactam and a 10-bromo-Coβ-phenylcobalamin combine a c-lactam or 10-bromo modification at the “eastern” site of the corrin ring with an artificial organometallic phenyl group instead of a cyano ligand at the β-site of the cobalt center. These two doubly-modified B12 antagonists (10 nM) inhibit fully B12-dependent (0.1 nM) growth of L. delbrueckii. In contrast to potent 10-bromo-Coβ-phenylcobalamin, single modified 10-bromo-Coβ-cyanocobalamin lacking the artificial organometallic phenyl ligand does not show any inhibitory effect. These results suggest, that the organometallic β-phenyl ligand at the Co center ultimately steers the metabolic effect of the 10-bromo-analogue. This study describes the syntheses of four singly- and two doubly-modified vitamin B12 derivatives for generating antimetabolites of Lactobacillus delbrueckii (L. delbrueckii).![]()
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Affiliation(s)
- Christopher Brenig
- Department of Chemistry, University of ZurichWinterthurerstrasse 190CH 8057 ZurichSwitzerlandhttps://www.felix-zelder.net+41 44 635 6803
| | - Paula Daniela Mestizo
- Department of Chemistry, University of ZurichWinterthurerstrasse 190CH 8057 ZurichSwitzerlandhttps://www.felix-zelder.net+41 44 635 6803
| | - Felix Zelder
- Department of Chemistry, University of ZurichWinterthurerstrasse 190CH 8057 ZurichSwitzerlandhttps://www.felix-zelder.net+41 44 635 6803
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7
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Kovalev IS, Zyryanov GV, Santra S, Majee A, Varaksin MV, Charushin VN. Folic Acid Antimetabolites (Antifolates): A Brief Review on Synthetic Strategies and Application Opportunities. Molecules 2022; 27:molecules27196229. [PMID: 36234766 PMCID: PMC9573478 DOI: 10.3390/molecules27196229] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 11/30/2022] Open
Abstract
Antimetabolites of folic acid represent a large group of drugs and drug candidates, including those for cancer chemotherapy. In this current review, the most common methods and approaches are presented for the synthesis of therapeutically significant antimetabolites of folic acid, which are Methotrexate (MTX), Raltitrexed (Tomudex, ZD1694), Pralatrexate, Pemetrexed, TNP-351, and Lometrexol. In addition, the applications or uses of these folic acid antimetabolites are also discussed.
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Affiliation(s)
- Igor S. Kovalev
- Department of Organic & Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia
| | - Grigory V. Zyryanov
- Department of Organic & Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia
- I. Ya. Postovskiy Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 620219 Yekaterinburg, Russia
- Correspondence: or (G.V.Z.); (A.M.)
| | - Sougata Santra
- Department of Organic & Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia
| | - Adinath Majee
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
- Correspondence: or (G.V.Z.); (A.M.)
| | - Mikhail V. Varaksin
- Department of Organic & Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia
- I. Ya. Postovskiy Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 620219 Yekaterinburg, Russia
| | - Valery N. Charushin
- Department of Organic & Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia
- I. Ya. Postovskiy Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 620219 Yekaterinburg, Russia
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8
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Mahwish N, Bairy LK, Srinivasamurthy S. Antivitamins: A Silver Lining in the Era of Antimicrobial Resistance. J Pharmacol Pharmacother 2022. [DOI: 10.1177/0976500x221080378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Antivitamins are compounds that negate the biological effects of vitamins. They have been successfully exploited for the development of various classes of drugs. In the early 19th century, the antifolate prontosil was developed for the treatment of puerperal fever. Since then, numerous other antifolates have been used to treat a wide range of infections. Antifolates, such as methotrexate, are potent anticancer agents and antivitamin K, such as warfarin, are used as anticoagulants. Despite several years of research, most antivitamin-based drugs are limited to vitamin K and B9, and the development of antagonists for other vitamins is still in the nascent stage. In the era of antimicrobial resistance, antivitamins can be considered as a promising alternative to develop newer antimicrobials and are worth exploring further. This review discusses key antivitamins at different stages of development which have potential utility as antibiotic drug candidates. The summary of studies of antivitamins in clinical development is also narrated.
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Affiliation(s)
- Nayesha Mahwish
- Department of Pharmacology, Ras Al Khaimah College of Medical Sciences (RAKCOMS), RAK Medical and Health Sciences University Ras Al Khaimah (RAKMHSU), Ras Al Khaimah, United Arab Emirates
| | - Laxminarayana Kurady Bairy
- Department of Pharmacology, Ras Al Khaimah College of Medical Sciences (RAKCOMS), RAK Medical and Health Sciences University Ras Al Khaimah (RAKMHSU), Ras Al Khaimah, United Arab Emirates
| | - Sureshkumar Srinivasamurthy
- Department of Pharmacology, Ras Al Khaimah College of Medical Sciences (RAKCOMS), RAK Medical and Health Sciences University Ras Al Khaimah (RAKMHSU), Ras Al Khaimah, United Arab Emirates
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9
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Affiliation(s)
- Bernhard Kräutler
- Institute of Organic Chemistry and Centre of Molecular Biosciences, University of Innsbruck, Innsbruck, Austria.
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10
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Brenig C, Mosberger L, Baumann K, Blacque O, Zelder F. Redox‐Neutral Syntheses and Electrochemical Studies of 10‐Bromo‐Substituted Light‐Stable Antivitamin B
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Candidates. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Christopher Brenig
- Department of Chemistry University of Zurich Winterthurerstrasse 190 CH-8057 Zurich Switzerland
| | - Leila Mosberger
- Department of Chemistry University of Zurich Winterthurerstrasse 190 CH-8057 Zurich Switzerland
| | - Katja Baumann
- Department of Chemistry University of Zurich Winterthurerstrasse 190 CH-8057 Zurich Switzerland
| | - Olivier Blacque
- Department of Chemistry University of Zurich Winterthurerstrasse 190 CH-8057 Zurich Switzerland
| | - Felix Zelder
- Department of Chemistry University of Zurich Winterthurerstrasse 190 CH-8057 Zurich Switzerland
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11
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Rzepka Z, Rok J, Maszczyk M, Beberok A, Hermanowicz JM, Pawlak D, Gryko D, Wrześniok D. Response of Human Glioblastoma Cells to Vitamin B12 Deficiency: A Study Using the Non-Toxic Cobalamin Antagonist. BIOLOGY 2021; 10:biology10010069. [PMID: 33478021 PMCID: PMC7835758 DOI: 10.3390/biology10010069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/11/2021] [Accepted: 01/15/2021] [Indexed: 12/25/2022]
Abstract
The most important biological function of vitamin B12 is to accomplish DNA synthesis, which is necessary for cell division. Cobalamin deficiency may be especially acute for rapidly dividing cells, such as glioblastoma cells. Therefore, cobalamin antagonists offer a medicinal potential for developing anti-glioma agents. In the present study, we developed an in vitro model of cobalamin deficiency in glioblastoma cells. Long-term treatment of cells with the cobalamin analogue, hydroxycobalamin [c-lactam] (HCCL) was applied to induce an increase of hypocobalaminemia biomarker. Cytometric assays demonstrated that vitamin B12 promoted glioblastoma cells proliferation, whereas the treatment of cells with HCCL caused a dramatic inhibition of cell proliferation and an induction of cell cycle arrest at the G2/M phase. Vitamin B12 counteracted all the observed effects of HCCL. In the in silico study, we characterized the molecular interactions between HCCL and transcobalamin II (TCII). We have demonstrated that HCCL shares similar interactions with TCII as naturally occurring cobalamins and therefore may act as a competitive inhibitor of this key transporter protein. We assessed the impact of HCCL on the mortality or developmental malformations of zebrafish embryos. Collectively, our findings suggest that the use of cobalamin transport antagonists as potential anti-glioma agents would be worth exploring further.
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Affiliation(s)
- Zuzanna Rzepka
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (M.M.); (A.B.)
| | - Jakub Rok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (M.M.); (A.B.)
| | - Mateusz Maszczyk
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (M.M.); (A.B.)
| | - Artur Beberok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (M.M.); (A.B.)
| | - Justyna Magdalena Hermanowicz
- Department of Pharmacodynamics, Medical University of Bialystok, Mickiewicza 2C, 15-222 Bialystok, Poland; (J.M.H.); (D.P.)
| | - Dariusz Pawlak
- Department of Pharmacodynamics, Medical University of Bialystok, Mickiewicza 2C, 15-222 Bialystok, Poland; (J.M.H.); (D.P.)
| | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw, Poland;
| | - Dorota Wrześniok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (M.M.); (A.B.)
- Correspondence: ; Tel.: +48-323-641-050
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12
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Kräutler B, Widner FJ, Kieninger C, Wurst K, Deery E, Lawrence AD, Warren MJ. Synthesis, Spectral Characterization and Crystal Structure of Chlororhodibalamin: A Synthesis Platform for Rhodium Analogues of Vitamin B12 and for Rh-Based Antivitamins B12. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1707288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractChlororhodibalamin (ClRhbl), a rhodium analogue of vitamin B12 (cyanocobalamin), was prepared in 84% yield by metalation of the metal-free B12 ligand hydrogenobalamin using the RhI-complex [Rh(CO)2Cl]2. ClRhbl was identified and characterized by UV/Vis, circular dichroism, high-resolution mass and heteronuclear NMR spectra. The RhIII-corrin ClRhbl features the ‘base-on’ architecture of vitamin B12. X-ray analysis of single crystals of ClRhbl have revealed its detailed 3D-geometry and close structural similarity to the CoIII-analogue chlorocobalamin (ClCbl). ClRhbl is a versatile starting material for the preparation of other rhodibalamins, among them the organometallic derivatives adenosylrhodibalamin and methylrhodibalamin, the Rh analogues of the important coenzyme and cofactor forms of B12, adenosylcobalamin and methylcobalamin.
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Affiliation(s)
- Bernhard Kräutler
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck
| | - Florian J. Widner
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck
| | - Christoph Kieninger
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck
| | | | | | - Martin J. Warren
- School of Biosciences, University of Kent
- Quadram Institute Bioscience
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13
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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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14
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Rzepka Z, Rok J, Kowalska J, Banach K, Hermanowicz JM, Beberok A, Sieklucka B, Gryko D, Wrześniok D. Astrogliosis in an Experimental Model of Hypovitaminosis B12: A Cellular Basis of Neurological Disorders due to Cobalamin Deficiency. Cells 2020; 9:cells9102261. [PMID: 33050187 PMCID: PMC7600008 DOI: 10.3390/cells9102261] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 12/17/2022] Open
Abstract
Cobalamin deficiency affects human physiology with sequelae ranging from mild fatigue to severe neuropsychiatric abnormalities. The cellular and molecular aspects of the nervous system disorders associated with hypovitaminosis B12 remain largely unknown. Growing evidence indicates that astrogliosis is an underlying component of a wide range of neuropathologies. Previously, we developed an in vitro model of cobalamin deficiency in normal human astrocytes (NHA) by culturing the cells with c-lactam of hydroxycobalamin (c-lactam OH-Cbl). We revealed a non-apoptotic activation of caspases (3/7, 8, 9) in cobalamin-deficient NHA, which may suggest astrogliosis. The aim of the current study was to experimentally verify this hypothesis. We indicated an increase in the cellular expression of two astrogliosis markers: glial fibrillary acidic protein and vimentin in cobalamin-deficient NHA using Western blot analysis and immunocytochemistry with confocal laser scanning microscopy. In the next step of the study, we revealed c-lactam OH-Cbl as a potential non-toxic vitamin B12 antagonist in an in vivo model using zebrafish embryos. We believe that the presented results will contribute to a better understanding of the cellular mechanism underlying neurologic pathology due to cobalamin deficiency and will serve as a foundation for further studies.
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Affiliation(s)
- Zuzanna Rzepka
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
| | - Jakub Rok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
| | - Justyna Kowalska
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
| | - Klaudia Banach
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
| | - Justyna Magdalena Hermanowicz
- Department of Pharmacodynamics, Medical University of Bialystok, Mickiewicza 2C, 15-222 Bialystok, Poland; (J.M.H.); (B.S.)
| | - Artur Beberok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
| | - Beata Sieklucka
- Department of Pharmacodynamics, Medical University of Bialystok, Mickiewicza 2C, 15-222 Bialystok, Poland; (J.M.H.); (B.S.)
| | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw, Poland;
| | - Dorota Wrześniok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
- Correspondence: ; Tel.: +48-3-2364-1050
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15
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Resonance Raman Optical Activity Spectroscopy in Probing Structural Changes Invisible to Circular Dichroism Spectroscopy: A Study on Truncated Vitamin B 12 Derivatives. Molecules 2020; 25:molecules25194386. [PMID: 32987678 PMCID: PMC7584048 DOI: 10.3390/molecules25194386] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/21/2020] [Accepted: 09/23/2020] [Indexed: 01/04/2023] Open
Abstract
This work demonstrates resonance Raman optical activity (RROA) spectra of three truncated vitamin B12 derivatives modified within the nucleotide loop. Since truncated cobalamins possess sufficiently high rotational strength in the range of ROA excitation (532 nm), it was possible to record their spectra in the resonance condition. They showed several distinct spectral features allowing for the distinguishing of studied compounds, in contrast to other methods, i.e., UV-Vis absorption, electronic circular dichroism, and resonance Raman spectroscopy. The improved capacity of the RROA method is based here on the excitation of molecules via more than two electronic states, giving rise to the bisignate RROA spectrum, significantly distinct from a parent Raman spectrum. This observation is an important step in the dissemination of using RROA spectroscopy in studying the complex structure of corrinoids which may prove crucial for a better understanding of their biological role.
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16
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Sokolovskaya OM, Shelton AN, Taga ME. Sharing vitamins: Cobamides unveil microbial interactions. Science 2020; 369:369/6499/eaba0165. [PMID: 32631870 DOI: 10.1126/science.aba0165] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Microbial communities are essential to fundamental processes on Earth. Underlying the compositions and functions of these communities are nutritional interdependencies among individual species. One class of nutrients, cobamides (the family of enzyme cofactors that includes vitamin B12), is widely used for a variety of microbial metabolic functions, but these structurally diverse cofactors are synthesized by only a subset of bacteria and archaea. Advances at different scales of study-from individual isolates, to synthetic consortia, to complex communities-have led to an improved understanding of cobamide sharing. Here, we discuss how cobamides affect microbes at each of these three scales and how integrating different approaches leads to a more complete understanding of microbial interactions.
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Affiliation(s)
- Olga M Sokolovskaya
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Amanda N Shelton
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Michiko E Taga
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, USA.
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17
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Szczepańska M, Lodowski P, Jaworska M. Electronic excited states and luminescence properties of palladium(II)corrin complex. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Xie P, Zhu Y, Huang X, Gao G, Wei F, Guo F, Jiang S, Wang C. A novel probe based on rhodamine 101 spirolactam and 2-(2'-hydroxy-5'-methylphenyl)benzothiazole moieties for three-in-one detection of paramagnetic Cu 2+, Co 2+ and Ni 2. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 222:117171. [PMID: 31174148 DOI: 10.1016/j.saa.2019.117171] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 05/11/2019] [Accepted: 05/26/2019] [Indexed: 05/19/2023]
Abstract
A novel probe based on rhodamine 101 spirolactam and 2-(2'-hydroxy-5'-methylphenyl)benzothiazole moieties (probe 1) was developed as a three-in-one platform for detection of paramagnetic Cu2+, Co2+ and Ni2+ through different processes. Ratiometric changes in emission intensities at 565 nm and 460 nm for 1 (λex = 350 nm) were observed in presence of Co2+, Cu2+ and Ni2+ respectively. This probe displayed ratiometric colorimetric responses and 'turn-on' fluorescence responses (λex = 540 nm) toward Cu2+ and Co2+. Whereas probe 1 exhibited very weak absorption around 480 nm, no 'turn-on' emission (λex = 540 nm) in presence of Ni2+. The detection limits were 0.11 μM and 0.17 μM for Cu2+ and Co2+ ions respectively from ratiometric colorimetric measurements and 26 nM, 54 nM and 101 nM for Cu2+, Co2+ and Ni2+ respectively from ratiometric fluorometric measurements. The excited-state intramolecular proton transfer (ESIPT)-prohibited coupled ring-open process for 1-Cu2+ (1-Co2+) and ESIPT-prohibited irreversible process for 1-Ni2+ were proposed according to the spectral results. Furthermore, probe 1 was utilized to determine Cu2+ and Co2+ in real-life samples with good recoveries.
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Affiliation(s)
- Puhui Xie
- College of Sciences, Henan Agricultural University, Zhengzhou 450002, PR China.
| | - Yanru Zhu
- College of Sciences, Henan Agricultural University, Zhengzhou 450002, PR China
| | - Xuewei Huang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China
| | - Guangqin Gao
- College of Sciences, Henan Agricultural University, Zhengzhou 450002, PR China
| | - Fengli Wei
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China
| | - Fengqi Guo
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
| | - Song Jiang
- College of Sciences, Henan Agricultural University, Zhengzhou 450002, PR China.
| | - Caixia Wang
- College of Sciences, Henan Agricultural University, Zhengzhou 450002, PR China
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19
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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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20
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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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21
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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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22
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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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23
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Hassan S, Jackowska A, Gryko D. Truncated vitamin B12 derivative with the phosphate group retained. J PORPHYR PHTHALOCYA 2019. [DOI: 10.1142/s1088424619500421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Cobyric acid and cobinamide are valuable building blocks for the synthesis of artificial cobalamins modified at the nucleotide loop. However, truncated vitamin B[Formula: see text] derivatives are devoid of the phosphate group. We have found that 2-iodoxy benzoic acid-mediated phosphorolysis leads to the cleavage of only one of the phosphodiester bond giving a vitamin B[Formula: see text] analogue with the phosphate moiety preserved. Subsequent alkylation with an organic halide establishes its role as a precursor for the synthesis of vitamin B[Formula: see text] mimics modified at the nucleotide loop.
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Affiliation(s)
- Sidra Hassan
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Agnieszka Jackowska
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Dorota Gryko
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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24
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Goral J, Cuadros K, Pitstick L, Meyer A, Jham BC, Guimaraes EP, Hanemann JAC, Green JM. Decreased expression of folate transport proteins in oral cancer. Oral Surg Oral Med Oral Pathol Oral Radiol 2019; 127:417-424. [PMID: 30853412 DOI: 10.1016/j.oooo.2018.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 08/30/2018] [Accepted: 09/09/2018] [Indexed: 10/28/2022]
Abstract
OBJECTIVES The purpose of this study was to assess the expression of the 3 major folate transporters-folate receptors (FRs), reduced folate carrier (RFC), and proton-coupled folate transporter (PCFT)-in oral squamous cell carcinoma (OSCC). We hypothesized that patterns of expression of folate transporters would be different in OSCC compared with normal oral epithelium. STUDY DESIGN We used immunohistochemistry to examine the expression of FR, RFC, and PCFT in 15 primary specimens collected from patients with OSCC, 2 human cadaveric samples of OSCC, and 12 normal human cadaveric oral tissues from a medical gross anatomy laboratory. Possible correlations between the expression of each folate transporter and patients' clinical data were determined. RESULTS All 3 folate transporters were highly expressed in normal oral epithelium. In contrast, OSCC samples generally demonstrated low expression of FR, RFC, and PCFT, with wide distribution in the invading cancer cells. There were no differences in folate transporter expression between OSCC samples collected from patients and from human cadavers. The lowest expression of FR and PCFT characterized less-differentiated tumors, and the lowest expression of RFC correlated with higher lymph node involvement. CONCLUSIONS Human oral cancer samples expressed decreased amounts of all 3 major folate transport proteins compared with controls from normal cadaveric oral tissues.
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Affiliation(s)
- Joanna Goral
- Department of Anatomy, Chicago College of Osteopathic Medicine, Midwestern University, Downers Grove, IL, USA
| | - Kayla Cuadros
- William Carey University, College of Osteopathic Medicine, Hattiesburg, MS, USA
| | - Lenore Pitstick
- Department of Biochemistry, Chicago College of Osteopathic Medicine, Midwestern University, Downers Grove, IL, USA
| | - Alice Meyer
- Department of Anatomy, Chicago College of Osteopathic Medicine, Midwestern University, Downers Grove, IL, USA
| | - Bruno Correia Jham
- College of Dental Medicine, Midwestern University, Downers Grove, IL, USA
| | - Eduardo Pereira Guimaraes
- Department of Clinic and Surgery, School of Dentistry, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - João Adolfo Costa Hanemann
- Department of Clinic and Surgery, School of Dentistry, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - Jacalyn M Green
- Department of Biochemistry, Chicago College of Osteopathic Medicine, Midwestern University, Downers Grove, IL, USA.
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25
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Affiliation(s)
- Aleksandra J. Wierzba
- Institute of Organic ChemistryPolish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
| | - Sidra Hassan
- Institute of Organic ChemistryPolish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
| | - Dorota Gryko
- Institute of Organic ChemistryPolish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
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26
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Dang T, Nizamov IS, Salikhov RZ, Sabirzyanova LR, Vorobev VV, Burganova TI, Shaidoullina MM, Batyeva ES, Cherkasov RA, Abdullin TI. Synthesis and characterization of pyridoxine, nicotine and nicotinamide salts of dithiophosphoric acids as antibacterial agents against resistant wound infection. Bioorg Med Chem 2018; 27:100-109. [PMID: 30503413 DOI: 10.1016/j.bmc.2018.11.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/29/2018] [Accepted: 11/13/2018] [Indexed: 01/17/2023]
Abstract
The pyridine-derived biomolecules are of considerable interest in developing medicinal compounds with various specific activities. Novel ammonium salts of pyridoxine, (S)-(-)-nicotine and nicotinamide with O,O-diorganyl dithiophosphoric acids (DTPA) were synthesized and characterized. The complexation of chiral monoterpenyl DTPA, including (S)-(-)-menthyl, (R)-(+)-menthyl, (1R)-endo-(+)-fenchyl, (1S,2S,3S,5R)-(+)-isopinocampheolyl derivatives, with pyridoxine and nicotine provided effective antibacterial compounds 3a,b,e,f, and 5a,b,d,f with MIC values against Gram-positive bacteria as low as 10 µM (6 µg/mL). Two selected pyridoxine and nicotine salts based on menthyl DTPA 3a and 5a were similarly active against antibiotic-resistant bacteria from burn wounds including MRSA. The compounds had enhanced amphiphilic and hemolytic properties and effectively altered surface characteristics and matrix-secreting ability of P. aeroginosa and S. aureus. MBC/MIC ratios of 3a and 5a suggested the bactericidal mode of their action. Furthermore, the compounds exhibited moderate cytotoxicity towards human skin fibroblasts (IC50 = 48.6 and 57.6 µM, respectively, 72 h), encouraging their further investigation as potential antimicrobials against skin and wound infections.
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Affiliation(s)
- Trinh Dang
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Ilyas S Nizamov
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia; A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov St., 420088 Kazan, Russia.
| | - Ramazan Z Salikhov
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Leysan R Sabirzyanova
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Vyacheslav V Vorobev
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | | | | | - Elvira S Batyeva
- A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov St., 420088 Kazan, Russia
| | - Rafael A Cherkasov
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Timur I Abdullin
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia.
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27
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Zelder F. Modified vitamin B12 derivatives with a peptide backbone for biomimetic studies and medicinal applications. J PORPHYR PHTHALOCYA 2018. [DOI: 10.1142/s108842461830001x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This short review highlights the author’s group research on modified vitamin B[Formula: see text] derivatives with a peptide backbone as (1) inhibitors of B[Formula: see text]-dependent enzymes and as (2) models of cofactor B[Formula: see text]-protein complexes.
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Affiliation(s)
- Felix Zelder
- Department of Chemistry, University of Zurich, Switzerland
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28
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Lodowski P, Toda MJ, Ciura K, Jaworska M, Kozlowski PM. Photolytic Properties of Antivitamins B12. Inorg Chem 2018; 57:7838-7850. [DOI: 10.1021/acs.inorgchem.8b00956] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Piotr Lodowski
- Department of Theoretical Chemistry, Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, PL-40 006 Katowice, Poland
| | - Megan J. Toda
- Department of Chemistry, University of Louisville, 2320 South Brook Street, Louisville, Kentucky 40292, United States
| | - Karolina Ciura
- Department of Theoretical Chemistry, Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, PL-40 006 Katowice, Poland
| | - Maria Jaworska
- Department of Theoretical Chemistry, Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, PL-40 006 Katowice, Poland
| | - Pawel M. Kozlowski
- Department of Chemistry, University of Louisville, 2320 South Brook Street, Louisville, Kentucky 40292, United States
- Department of Food Sciences, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416 Gdansk, Poland
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29
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30
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Saidykhan A, Ebert J, Ally H, Gallagher RT, Martin WH, Bowen RD. The scope and regioselectivity of intramolecular N-C rearrangements of orthogonally protected sulfonamides, including cyclization to saccharin derivatives. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.06.053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ruetz M, Shanmuganathan A, Gherasim C, Karasik A, Salchner R, Kieninger C, Wurst K, Banerjee R, Koutmos M, Kräutler B. Inhibierung des humanen B12-verarbeitenden Enzyms CblC durch Antivitamine B12- Kristallstruktur des inaktiven ternären Komplexes mit dem Kosubstrat Glutathion. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701583] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Markus Ruetz
- Institut für Organische Chemie und Zentrum für Molekulare, Biowissenschaften; Universität Innsbruck; 6020 Innsbruck Österreich
- University of Michigan Medical School; Ann Arbor MI 48109-0600 USA
| | | | - Carmen Gherasim
- University of Michigan Medical School; Ann Arbor MI 48109-0600 USA
- Department of Pathology; University of Utah School of Medicine; Salt Lake City UT USA
| | - Agnes Karasik
- Department of Biochemistry; Uniformed Services University of the Health Sciences; Bethesda MD 28104 USA
| | - Robert Salchner
- Institut für Organische Chemie und Zentrum für Molekulare, Biowissenschaften; Universität Innsbruck; 6020 Innsbruck Österreich
- Watercryst GmbH & Co; Kematen Österreich
| | - Christoph Kieninger
- Institut für Organische Chemie und Zentrum für Molekulare, Biowissenschaften; Universität Innsbruck; 6020 Innsbruck Österreich
| | - Klaus Wurst
- Institut für Allgemeine, Anorganische Chemie und Theoretische Chemie; Universität Innsbruck; Österreich
| | - Ruma Banerjee
- University of Michigan Medical School; Ann Arbor MI 48109-0600 USA
| | - Markos Koutmos
- Department of Biochemistry; Uniformed Services University of the Health Sciences; Bethesda MD 28104 USA
| | - Bernhard Kräutler
- Institut für Organische Chemie und Zentrum für Molekulare, Biowissenschaften; Universität Innsbruck; 6020 Innsbruck Österreich
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Ruetz M, Shanmuganathan A, Gherasim C, Karasik A, Salchner R, Kieninger C, Wurst K, Banerjee R, Koutmos M, Kräutler B. Antivitamin B 12 Inhibition of the Human B 12 -Processing Enzyme CblC: Crystal Structure of an Inactive Ternary Complex with Glutathione as the Cosubstrate. Angew Chem Int Ed Engl 2017; 56:7387-7392. [PMID: 28544088 DOI: 10.1002/anie.201701583] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Indexed: 02/06/2023]
Abstract
B12 antivitamins are important and robust tools for investigating the biological roles of vitamin B12 . Here, the potential antivitamin B12 2,4-difluorophenylethynylcobalamin (F2PhEtyCbl) was prepared, and its 3D structure was studied in solution and in the crystal. Chemically inert F2PhEtyCbl resisted thermolysis of its Co-C bond at 100 °C, was stable in bright daylight, and also remained intact upon prolonged storage in aqueous solution at room temperature. It binds to the human B12 -processing enzyme CblC with high affinity (KD =130 nm) in the presence of the cosubstrate glutathione (GSH). F2PhEtyCbl withstood tailoring by CblC, and it also stabilized the ternary complex with GSH. The crystal structure of this inactivated assembly provides first insight into the binding interactions between an antivitamin B12 and CblC, as well as into the organization of GSH and a base-off cobalamin in the active site of this enzyme.
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Affiliation(s)
- Markus Ruetz
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, 6020, Innsbruck, Austria.,University of Michigan Medical School, Ann Arbor, USA
| | | | - Carmen Gherasim
- University of Michigan Medical School, Ann Arbor, USA.,Current address: Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Agnes Karasik
- Department of Biochemistry, Uniformed Services University of the Health Sciences, Bethesda, USA
| | - Robert Salchner
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, 6020, Innsbruck, Austria.,Current address: Watercryst GmbH & Co, Kematen, Austria
| | - Christoph Kieninger
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, 6020, Innsbruck, Austria
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Austria
| | - Ruma Banerjee
- University of Michigan Medical School, Ann Arbor, USA
| | - Markos Koutmos
- Department of Biochemistry, Uniformed Services University of the Health Sciences, Bethesda, USA
| | - Bernhard Kräutler
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, 6020, Innsbruck, Austria
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Lodowski P, Ciura K, Toda MJ, Jaworska M, Kozlowski PM. Photodissociation of ethylphenylcobalamin antivitamin B12. Phys Chem Chem Phys 2017; 19:30310-30315. [DOI: 10.1039/c7cp06589b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biologically active forms of cobalamins are crucial cofactors in biochemical reactions and these metabolites can be inhibited by their structurally similar analogues known as antivitamins B12.
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Affiliation(s)
- Piotr Lodowski
- Department of Theoretical Chemistry
- Institute of Chemistry
- University of Silesia in Katowice
- PL-40 006 Katowice
- Poland
| | - Karolina Ciura
- Department of Theoretical Chemistry
- Institute of Chemistry
- University of Silesia in Katowice
- PL-40 006 Katowice
- Poland
| | - Megan J. Toda
- Department of Chemistry
- University of Louisville
- Louisville
- USA
| | - Maria Jaworska
- Department of Theoretical Chemistry
- Institute of Chemistry
- University of Silesia in Katowice
- PL-40 006 Katowice
- Poland
| | - Pawel M. Kozlowski
- Department of Chemistry
- University of Louisville
- Louisville
- USA
- Department of Food Sciences
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Prieto L, Neuburger M, Spingler B, Zelder F. Inorganic Cyanide as Protecting Group in the Stereospecific Reconstitution of Vitamin B12 from an Artificial Green Secocorrinoid. Org Lett 2016; 18:5292-5295. [DOI: 10.1021/acs.orglett.6b02611] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Lucas Prieto
- Department
of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Markus Neuburger
- Department
of Chemistry, University of Basel, Spitalstr. 51, CH 4056 Basel, Switzerland
| | - Bernhard Spingler
- Department
of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Felix Zelder
- Department
of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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Zelder F. Recent trends in the development of vitamin B12 derivatives for medicinal applications. Chem Commun (Camb) 2015; 51:14004-17. [PMID: 26287029 DOI: 10.1039/c5cc04843e] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This Feature Article highlights recent developments in the field of vitamin B12 derivatives for medicinal applications. The following topics are emphasized: (1) the development of aquacorrinoids for cyanide detection and detoxification, (2) the use of vitamin B12 conjugates and (3) antivitamins B12 for therapy and diagnosis, and (4) the design of corrinoids as activators of soluble guanylyl cyclase (sGC).
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Affiliation(s)
- Felix Zelder
- Department of Chemistry, University of Zürich, Winterthurerstr. 190, CH-8057 Zürich, Switzerland.
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Abstract
B12 -antimetabolites are compounds that counteract the physiological effects of vitamin B12 and related natural cobalamins. Presented here is a structure- and reactivity-based concept of the specific 'antivitamins B12 ': it refers to analogues of vitamin B12 that display high structural similarity to the vitamin and are 'locked chemically' to prevent their metabolic conversion into the crucial organometallic B12 -cofactors. Application of antivitamins B12 to healthy laboratory animals is, thus, expected to induce symptoms of B12 -deficiency. Antivitamins B12 may, hence, be helpful in elucidating still largely puzzling pathophysiological phenomena associated with B12 -deficiency, and also in recognizing physiological roles of B12 that probably still remain to be discovered.
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Affiliation(s)
- Bernhard Kräutler
- Institute of Organic Chemistry & Center for Molecular Biosciences (CMBI), University of Innsbruck, Innrain 80/82, 6020 Innsbruck (Austria).
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