1
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Wang C, Lai Z, Huang G, Pan H. Current State of [Fe]‐Hydrogenase and Its Biomimetic Models. Chemistry 2022; 28:e202201499. [DOI: 10.1002/chem.202201499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Chao Wang
- Chemistry and Biomedicine Innovation Center (ChemBIC) State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University 163 Xianlin Avenue 210023 Nanjing P. R. China
| | - Zhenli Lai
- Key Laboratory of Development and Application of Rural Renewable Energy Biogas Institute of Ministry of Agriculture and Rural Affairs Section 4–13, Renmin South Road 610041 Chengdu P. R. China
| | - Gangfeng Huang
- Key Laboratory of Development and Application of Rural Renewable Energy Biogas Institute of Ministry of Agriculture and Rural Affairs Section 4–13, Renmin South Road 610041 Chengdu P. R. China
| | - Hui‐Jie Pan
- Chemistry and Biomedicine Innovation Center (ChemBIC) State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University 163 Xianlin Avenue 210023 Nanjing P. R. China
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2
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Song LC, Zhang ZQ, Liu BB, Wang YP, Chen S. Biomimetic models of [Fe]-hydrogenase featuring a 2-acylphenylthiomethyl-6-R-pyridine (R = H or OMe) ligand. Chem Commun (Camb) 2022; 58:12168-12171. [DOI: 10.1039/d2cc04523k] [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
A new flexible pyridine ligand (FPL)-based method is developed, by which two novel biomimetic models of [Fe]-H2ase are prepared and their enzyme-like H2/D2 activation functions are studied.
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Affiliation(s)
- Li-Cheng Song
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Zhen-Qing Zhang
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Bei-Bei Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Yin-Peng Wang
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Shuai Chen
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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3
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Goralski ST, Rose MJ. Emerging artificial metalloenzymes for asymmetric hydrogenation reactions. Curr Opin Chem Biol 2021; 66:102096. [PMID: 34879303 DOI: 10.1016/j.cbpa.2021.102096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/24/2021] [Accepted: 10/04/2021] [Indexed: 01/26/2023]
Abstract
Artificial metalloenzymes (ArMs) utilize the best properties of homogenous transition metal catalysts and naturally occurring proteins. While synthetic metal complexes offer high tunability and broad-scope reactivity with a variety of substrates, enzymes further endow these complexes with enhanced aqueous stability and stereoselectivity. For these reasons, dozens of ArMs have been designed to perform catalytic asymmetric hydrogenation reactions, and hydrogenase ArMs are, in fact, the oldest class of ArMs. Herein, we report recent advances in the design of hydrogenase ArMs, including (i) the modification of natural [Fe]-hydrogenase by insertion of artificial metallocofactors, (ii) design of a novel ArM system from the tractable and inexpensive protein β-lactoglobulin to afford a high-performing transfer hydrogenase, and (iii) the design of chimeric streptavidin scaffolds that drastically alter the secondary coordination sphere of previously reported streptavidin/biotin transfer hydrogenase ArMs.
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Affiliation(s)
- Sean T Goralski
- Department of Chemistry, University of Texas at Austin, 105 E. 24th St. Stop A5300, Austin, TX, 78712, USA
| | - Michael J Rose
- Department of Chemistry, University of Texas at Austin, 105 E. 24th St. Stop A5300, Austin, TX, 78712, USA.
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4
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Kerns SA, Seo J, Lynch VM, Shearer J, Goralski ST, Sullivan ER, Rose MJ. Scaffold-based [Fe]-hydrogenase model: H 2 activation initiates Fe(0)-hydride extrusion and non-biomimetic hydride transfer. Chem Sci 2021; 12:12838-12846. [PMID: 34703571 PMCID: PMC8494020 DOI: 10.1039/d0sc03154b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 09/01/2021] [Indexed: 11/21/2022] Open
Abstract
We report the synthesis and reactivity of a model of [Fe]-hydrogenase derived from an anthracene-based scaffold that includes the endogenous, organometallic acyl(methylene) donor. In comparison to other non-scaffolded acyl-containing complexes, the complex described herein retains molecularly well-defined chemistry upon addition of multiple equivalents of exogenous base. Clean deprotonation of the acyl(methylene) C–H bond with a phenolate base results in the formation of a dimeric motif that contains a new Fe–C(methine) bond resulting from coordination of the deprotonated methylene unit to an adjacent iron center. This effective second carbanion in the ligand framework was demonstrated to drive heterolytic H2 activation across the Fe(ii) center. However, this process results in reductive elimination and liberation of the ligand to extrude a lower-valent Fe–carbonyl complex. Through a series of isotopic labelling experiments, structural characterization (XRD, XAS), and spectroscopic characterization (IR, NMR, EXAFS), a mechanistic pathway is presented for H2/hydride-induced loss of the organometallic acyl unit (i.e. pyCH2–C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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O → pyCH3+C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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O). The known reduced hydride species [HFe(CO)4]− and [HFe3(CO)11]− have been observed as products by 1H/2H NMR and IR spectroscopies, as well as independent syntheses of PNP[HFe(CO)4]. The former species (i.e. [HFe(CO)4]−) is deduced to be the actual hydride transfer agent in the hydride transfer reaction (nominally catalyzed by the title compound) to a biomimetic substrate ([TolIm](BArF) = fluorinated imidazolium as hydride acceptor). This work provides mechanistic insight into the reasons for lack of functional biomimetic behavior (hydride transfer) in acyl(methylene)pyridine based mimics of [Fe]-hydrogenase. We report the synthesis and reactivity of a model of [Fe]-hydrogenase derived from an anthracene-based scaffold that includes the endogenous, organometallic acyl(methylene) donor.![]()
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Affiliation(s)
- Spencer A Kerns
- Department of Chemistry, The University of Texas at Austin Austin Texas 78712 USA
| | - Junhyeok Seo
- Department of Chemistry, Gwangju Institute of Science and Technology Gwangju 61005 Republic of Korea
| | - Vincent M Lynch
- Department of Chemistry, The University of Texas at Austin Austin Texas 78712 USA
| | - Jason Shearer
- Department of Chemistry, Trinity University One Trinity Place San Antonio Texas 78212 USA
| | - Sean T Goralski
- Department of Chemistry, The University of Texas at Austin Austin Texas 78712 USA
| | - Eileen R Sullivan
- Department of Chemistry, The University of Texas at Austin Austin Texas 78712 USA
| | - Michael J Rose
- Department of Chemistry, The University of Texas at Austin Austin Texas 78712 USA
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5
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Anthracene-induced formation of highly twisted metallacycle and its crystal structure and tunable assembly behaviors. Proc Natl Acad Sci U S A 2021; 118:2102602118. [PMID: 34183395 DOI: 10.1073/pnas.2102602118] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Polycyclic aromatic hydrocarbons (PAHs) continue to attract increasing interest with respect to their applications as luminescent materials. The ordered structure of the metal-organic complex facilitates the selective integration of PAHs that can be tuned to function cooperatively. Here, a unique highly twisted anthracene-based organoplatinum metallacycle was prepared via coordination-driven self-assembly. Single-crystal X-ray diffraction analysis revealed that the metallacycle was twisted through the cooperation of strong π···π stacking interactions and steric hindrance between two anthracene-based ligands. Notably, the intramolecular twist and aggregation behavior introduced restrictions to the conformational change of anthracenes, which resulted in increased emission intensity of the metallacycle in solution. The emission behaviors and suprastructures based on the highly twisted metallacycle can be modulated by the introduction of different solvents. This study demonstrates that this metallacycle with highly twisted structure is a promising candidate for sensing and bioimaging applications.
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6
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Abstract
The role of deuterium in disentangling key steps of the mechanisms of H2 activation by mimics of hydrogenases is presented. These studies have allowed to a better understanding of the mode of action of the natural enzymes and their mimics.
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Affiliation(s)
- Mar Gómez-Gallego
- Departamento de Química Orgánica I and Center for Innovation in Advanced Chemistry (ORFEO-CINQA). Facultad de Química
- Universidad Complutense
- 28040-Madrid
- Spain
| | - Miguel A. Sierra
- Departamento de Química Orgánica I and Center for Innovation in Advanced Chemistry (ORFEO-CINQA). Facultad de Química
- Universidad Complutense
- 28040-Madrid
- Spain
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7
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Barik CK, Ganguly R, Kwan JM, Lam Z, Wong SY, Leong WK. Ruthenacyclic carbamoyl mimics of the [Fe]-hydrogenase active site: Derivatisation at the 4-position of the pyridinyl ring. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Crystal Structures of [Fe]-Hydrogenase from Methanolacinia paynteri Suggest a Path of the FeGP-Cofactor Incorporation Process. INORGANICS 2020. [DOI: 10.3390/inorganics8090050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
[Fe]-hydrogenase (Hmd) catalyzes the reversible heterolytic cleavage of H2, and hydride transfer to methenyl-tetrahydromethanopterin (methenyl-H4MPT+). The iron-guanylylpyridinol (FeGP) cofactor, the prosthetic group of Hmd, can be extracted from the holoenzyme and inserted back into the protein. Here, we report the crystal structure of an asymmetric homodimer of Hmd from Methanolacinia paynteri (pHmd), which was composed of one monomer in the open conformation with the FeGP cofactor (holo-form) and a second monomer in the closed conformation without the cofactor (apo-form). In addition, we report the symmetric pHmd-homodimer structure in complex with guanosine monophosphate (GMP) or guanylylpyridinol (GP), in which each ligand was bound to the protein, where the GMP moiety of the FeGP-cofactor is bound in the holo-form. Binding of GMP and GP modified the local protein structure but did not induce the open conformation. The amino-group of the Lys150 appears to interact with the 2-hydroxy group of pyridinol ring in the pHmd–GP complex, which is not the case in the structure of the pHmd–FeGP complex. Lys150Ala mutation decreased the reconstitution rate of the active enzyme with the FeGP cofactor at the physiological pH. These results suggest that Lys150 might be involved in the FeGP-cofactor incorporation into the Hmd protein in vivo.
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9
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Barik CK, Chan XQ, Huynh HV, Li Y, Ganguly R, Leong WK. Ruthenium‐Based Structural Mimics of the Cofactor of [Fe]‐Hydrogenase: Replacement of the Acyl Moiety with an N‐Heterocyclic Carbene. ChemistrySelect 2020. [DOI: 10.1002/slct.202002889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chandan Kr Barik
- Division of Chemistry & Biological Chemistry Nanyang Technological University 21 Nanyang Link Singapore
| | - Xian Qi Chan
- Division of Chemistry & Biological Chemistry Nanyang Technological University 21 Nanyang Link Singapore
| | - Han Vinh Huynh
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry Nanyang Technological University 21 Nanyang Link Singapore
| | - Rakesh Ganguly
- Division of Chemistry & Biological Chemistry Nanyang Technological University 21 Nanyang Link Singapore
- Shiv Nadar University NH-91 Tehsil Dadri Gautam Buddha Nagar Uttar Pradesh 201314 India
| | - Weng Kee Leong
- Division of Chemistry & Biological Chemistry Nanyang Technological University 21 Nanyang Link Singapore
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10
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Kerns SA, Rose MJ. Scaffold-Based Functional Models of [Fe]-Hydrogenase (Hmd): Building the Bridge between Biological Structure and Molecular Function. Acc Chem Res 2020; 53:1637-1647. [PMID: 32786339 DOI: 10.1021/acs.accounts.0c00315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The well-known dinuclear [FeFe] and [NiFe] hydrogenase enzymes are redox-based proton reduction and H2 oxidation catalysts. In comparison, the structural and functional aspects of the mononuclear nonredox hydrogenase, known as [Fe]-hydrogenase or Hmd, have been less explored because of the relatively recent crystallographic elucidation of the enzyme active site. Additionally, the synthetic challenges posed by the highly substituted and asymmetric coordination environment of the iron guanylylpyridinol (FeGP) cofactor have hampered functional biomimetic modeling studies to a large extent. The active site contains an octahedral low-spin Fe(II) center with the following coordination motifs: a bidentate acyl-pyridone moiety (C,N) and cysteinyl-S in a facial arrangement; two cis carbonyl ligands; and a H2O/H2 binding site. In [Fe]-hydrogenase, heterolytic H2 activation putatively by the pendant pyridone/pyridonate-O base serving as a proton acceptor. Following H2 cleavage, an intermediate Fe-H species is thought to stereoselectively transfer a hydride to the substrate methenyl-H4MPT+, thus forming methylene-H4MPT. In the past decade, chemists, inspired by the elegant organometallic chemistry inherent to the FeGP cofactor, have synthesized a number of faithful structural models. However, functional systems are still relatively limited and often rely on abiological ligands or metal centers that obfuscate a direct correlation to nature's design.Our group has developed a bioinspired suite of synthetic analogues of Hmd to better understand the effects of structure on the stability and functionality of the Hmd active site, with a special emphasis on using a scaffold-based ligand design. This systematic approach has contributed to a deeper understanding of the unique ligand array of [Fe]-hydrogenase in nature and has ultimately resulted in the first functional synthetic models without the aid of abiological ligands. This Account reviews the reactivity of the functional anthracene-scaffolded synthetic models developed by our group in the context of current mechanistic understanding drawn from both protein crystallography and computational studies. Furthermore, we introduce a novel thermodynamic framework to place the reactivity of our model systems in context and provide an outlook on the future study of [Fe]-hydrogenase synthetic models through both a structural and functional lens.
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Affiliation(s)
- Spencer A. Kerns
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Michael J. Rose
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
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11
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Ding N, Li Z. When Anthracene and Quinone Avoid Cycloaddition: Acid-Catalyzed Redox Neutral Functionalization of Anthracene to Aryl Ethers. Org Lett 2020; 22:4276-4282. [PMID: 32396008 DOI: 10.1021/acs.orglett.0c01315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Benzoquinone and 9-phenylanthracene barely undergo anticipated cycloaddition under acid catalysis. Instead, 9-anthracenyl aryl ethers are obtained as unexpected products. Mechanistic studies indicate that the reaction likely undergoes an ionic mechanism between protonated anthracene species and nucleophilic oxygen of 1,4-benzoquinone or 1,4-hydroquinone. A variety of 9-anthracenyl aryl ethers are constructed with this method. Produced anthracenyl aryl ethers are potential scaffolds for new fluorescent molecules.
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Affiliation(s)
- Nan Ding
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China.,University of Chinese Academy of Sciences, Beijing 100049, China.,Shanghai Institute of Organic Chemistry, Shanghai 200032, China
| | - Zhi Li
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
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12
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Estrada-Montaño AS, Gries A, Oviedo-Fortino JA, Torres-Gutierrez C, Grain-Hayton A, Marcial-Hernández R, Shen L, Ryabov AD, Gaiddon C, Le Lagadec R. Dibromine Promoted Transmetalation of an Organomercurial by Fe(CO)5: Synthesis, Properties, and Cytotoxicity of Bis(2-C6H4-2′-py-κC,N)dicarbonyliron(II). Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00107] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aldo S. Estrada-Montaño
- Instituto de Quı́mica UNAM, Circuito Exterior s/n, Ciudad Universitaria, 04510 Ciudad de México, Mexico
| | - Alexandre Gries
- Strasbourg Université, Inserm UMR_S U1113, IRFAC, 3 Avenue Molière, 67200 Strasbourg, France
| | - José A. Oviedo-Fortino
- Instituto de Quı́mica UNAM, Circuito Exterior s/n, Ciudad Universitaria, 04510 Ciudad de México, Mexico
| | - Carolina Torres-Gutierrez
- Instituto de Quı́mica UNAM, Circuito Exterior s/n, Ciudad Universitaria, 04510 Ciudad de México, Mexico
| | - Amira Grain-Hayton
- Instituto de Quı́mica UNAM, Circuito Exterior s/n, Ciudad Universitaria, 04510 Ciudad de México, Mexico
| | | | - Longzhu Shen
- University of Cambridge, CB2 3EJ Cambridge, United Kingdom
| | - Alexander D. Ryabov
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Christian Gaiddon
- Strasbourg Université, Inserm UMR_S U1113, IRFAC, 3 Avenue Molière, 67200 Strasbourg, France
| | - Ronan Le Lagadec
- Instituto de Quı́mica UNAM, Circuito Exterior s/n, Ciudad Universitaria, 04510 Ciudad de México, Mexico
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13
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Pan HJ, Hu X. Biomimetic Hydrogenation Catalyzed by a Manganese Model of [Fe]-Hydrogenase. Angew Chem Int Ed Engl 2020; 59:4942-4946. [PMID: 31820844 DOI: 10.1002/anie.201914377] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Indexed: 12/16/2022]
Abstract
[Fe]-hydrogenase is an efficient biological hydrogenation catalyst. Despite intense research, Fe complexes mimicking the active site of [Fe]-hydrogenase have not achieved turnovers in hydrogenation reactions. Herein, we describe the design and development of a manganese(I) mimic of [Fe]-hydrogenase. This complex exhibits the highest activity and broadest scope in catalytic hydrogenation among known mimics. Thanks to its biomimetic nature, the complex exhibits unique activity in the hydrogenation of compounds analogous to methenyl-H4 MPT+ , the natural substrate of [Fe]-hydrogenase. This activity enables asymmetric relay hydrogenation of benzoxazinones and benzoxazines, involving the hydrogenation of a chiral hydride transfer agent using our catalyst coupled to Lewis acid-catalyzed hydride transfer from this agent to the substrates.
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Affiliation(s)
- Hui-Jie Pan
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), ISIC-LSCI, BCH 3305, Lausanne, 1015, Switzerland
| | - Xile Hu
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), ISIC-LSCI, BCH 3305, Lausanne, 1015, Switzerland
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14
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Methanogenesis involves direct hydride transfer from H2 to an organic substrate. Nat Rev Chem 2020; 4:213-221. [PMID: 37128042 DOI: 10.1038/s41570-020-0167-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/27/2020] [Indexed: 01/02/2023]
Abstract
Certain anaerobic microorganisms evolved a mechanism to use H2 as a reductant in their energy metabolisms. For these purposes, the microorganisms developed H2-activating enzymes, which are aspirational catalysts in a sustainable hydrogen economy. In the case of the hydrogenotrophic pathway performed by methanogenic archaea, 8e- are extracted from 4H2 and used as reducing equivalents to convert CO2 into CH4. Under standard cultivation conditions, these archaea express [NiFe]-hydrogenases, which are Ni-dependent and Fe-dependent enzymes and heterolytically cleave H2 into 2H+ and 2e-, the latter being supplied into the central metabolism. Under Ni-limiting conditions, F420-reducing [NiFe]-hydrogenases are downregulated and their functions are predominantly taken over by an upregulated [Fe]-hydrogenase. Unique in biology, this Fe-dependent hydrogenase cleaves H2 and directly transfers H- to an imidazolium-containing substrate. [Fe]-hydrogenase activates H2 at an Fe cofactor ligated by two CO molecules, an acyl group, a pyridinol N atom and a cysteine thiolate as the central constituent. This Fe centre has inspired chemists to not only design synthetic mimics to catalytically cleave H2 in solution but also for incorporation into apo-[Fe]-hydrogenase to give semi-synthetic proteins. This Perspective describes the enzymes involved in hydrogenotrophic methanogenesis, with a focus on those performing the reduction steps. Of these, we describe [Fe]-hydrogenases in detail and cover recent progress in their synthetic modelling.
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15
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Xie ZL, Chai W, Kerns SA, Henkelman GA, Rose MJ. Bioinspired CNP Iron(II) Pincers Relevant to [Fe]-Hydrogenase (Hmd): Effect of Dicarbonyl versus Monocarbonyl Motifs in H 2 Activation and Transfer Hydrogenation. Inorg Chem 2020; 59:2548-2561. [DOI: 10.1021/acs.inorgchem.9b03476] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhu-Lin Xie
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Wenrui Chai
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Spencer A. Kerns
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Graeme A. Henkelman
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Michael J. Rose
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
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16
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Pan H, Hu X. Biomimetic Hydrogenation Catalyzed by a Manganese Model of [Fe]‐Hydrogenase. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914377] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Hui‐Jie Pan
- Laboratory of Inorganic Synthesis and CatalysisInstitute of Chemical Sciences and EngineeringÉcole Polytechnique Fédérale de Lausanne (EPFL), ISIC-LSCI BCH 3305 Lausanne 1015 Switzerland
| | - Xile Hu
- Laboratory of Inorganic Synthesis and CatalysisInstitute of Chemical Sciences and EngineeringÉcole Polytechnique Fédérale de Lausanne (EPFL), ISIC-LSCI BCH 3305 Lausanne 1015 Switzerland
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17
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Song LC, Chen W, Zhu L, Hu FQ, Jiang KY. Synthesis, characterization, and some properties of two types of new [Fe]-H 2ase models containing a 4-phosphatopyridine or a 4-phosphatoguanosinepyridine moiety. NEW J CHEM 2020. [DOI: 10.1039/d0nj04194g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The novel [Fe]-H2ase active site framework-containing model 6 was first prepared and structurally characterized.
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Affiliation(s)
- Li-Cheng Song
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Wei Chen
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Liang Zhu
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Fu-Qiang Hu
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Kai-Yu Jiang
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
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18
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Song LC, Zhu L, Liu BB. A Biomimetic Model for the Active Site of [Fe]-H 2ase Featuring a 2-Methoxy-3,5-dimethyl-4-phosphato-6-acylmethylpyridine Ligand. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00635] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li-Cheng Song
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People’s Republic of China
| | - Liang Zhu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Bei-Bei Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
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19
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Cho YI, Durgaprasad G, Rose MJ. CNS and CNP Iron(II) Mono-Iron Hydrogenase (Hmd) Mimics: Role of Deprotonated Methylene(acyl) and the trans-Acyl Site in H 2 Heterolysis. Inorg Chem 2019; 58:12689-12699. [PMID: 31497945 DOI: 10.1021/acs.inorgchem.9b01530] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report syntheses and H2 activation involving model complexes of mono-iron hydrogenase (Hmd) derived from acyl-containing pincer ligand precursors bearing thioether (CNSPre) or phosphine (CNPPre) donor sets. Both complexes feature pseudo-octahedral iron(II) dicarbonyl units. While the CNS pincer adopts the expected mer-CNS (pincer) geometry, the CNP ligand unexpectedly adopts the fac-CNP coordination geometry. Both complexes exhibit surprisingly acidic methylene C-H bond (reversibly de/protonated by a bulky phenolate), which affords a putative dearomatized pyridinate-bound intermediate. Such base treatment of Fe-CNS also results in deligation of the thioether sulfur donor, generating an open coordination site trans from the acyl unit. In contrast, Fe-CNP maintains a CO ligand trans from the acyl site both in the parent and dearomatized complexes (the -PPh2 donor is cis to acyl). The dearomatized mer-Fe-CNS was competent for H2 activation (5 atm D2(g) plus phenolate as base), which is attributed to both the basic site on the ligand framework and the open coordination site trans to the acyl donor. In contrast, the dearomatized fac-Fe-CNP was not competent for H2 activation, which is ascribed to the blocked coordination site trans from acyl (occupied by CO ligand). These results highlight the importance of both (i) the open coordination site trans to the organometallic acyl donor and (ii) a pendant base in the enzyme active site.
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Affiliation(s)
- Yae In Cho
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Gummadi Durgaprasad
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Michael J Rose
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
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Barik CK, Ganguly R, Li Y, Leong WK. Very strong trans effect in ruthenacyclic carbamoyl complexes leads to ligand redistribution in phosphine derivatives. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.02.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Barik CK, Ganguly R, Li Y, Leong WK. Ruthenacyclic Carbamoyl Complexes: Highly Efficient Catalysts for Organosilane Hydrolysis. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chandan Kr Barik
- Division of Chemistry & Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore
| | - Rakesh Ganguly
- Division of Chemistry & Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore
| | - Weng Kee Leong
- Division of Chemistry & Biological Chemistry Nanyang Technological University 21 Nanyang Link 637371 Singapore
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Barik CK, Ganguly R, Li Y, Przybylski C, Salmain M, Leong WK. Embedding a Ruthenium-Based Structural Mimic of the [Fe]-Hydrogenase Cofactor into Papain. Inorg Chem 2018; 57:12206-12212. [PMID: 30198260 DOI: 10.1021/acs.inorgchem.8b01835] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We describe the synthesis of the ruthenacyclic carbamoyl complexes [Ru(2-NHC(O)C5H3NMe)(CO)2( o,o-Me2-C6H3S)(L)] (L = H2O or MeCN), which have a labile water or acetonitrile ligand at their sixth coordination sites. Steric bulk around the ruthenium center is essential in preventing isomerization and dimerization, and embedding within papain can be achieved via coordination of its sole free cysteine residue. The observed chemistry parallels that of the natural [Fe]-hydrogenase.
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Affiliation(s)
- Chandan Kr Barik
- Division of Chemistry & Biological Chemistry , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore
| | - Rakesh Ganguly
- Division of Chemistry & Biological Chemistry , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore
| | - Cédric Przybylski
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire (IPCM) , 4 place Jussieu , F-75005 Paris , France
| | - Michèle Salmain
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire (IPCM) , 4 place Jussieu , F-75005 Paris , France
| | - Weng Kee Leong
- Division of Chemistry & Biological Chemistry , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore
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Xie ZL, Pennington DL, Boucher DG, Lo J, Rose MJ. Effects of Thiolate Ligation in Monoiron Hydrogenase (Hmd): Stability of the {Fe(CO) 2} 2+ Core with NNS Ligands. Inorg Chem 2018; 57:10028-10039. [PMID: 30070112 DOI: 10.1021/acs.inorgchem.8b01185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, we report the effects of NNS-thiolate ligands and nuclearity (monomer, dimer) on the stability of iron complexes related to the active site of monoiron hydrogenase (Hmd). A thermally stable iron(II) dicarbonyl motif is the core feature of the active site, but the coordination features that lead to this property have not been independently evaluated for their contributions to the {Fe(CO)2}2+ stability. As such, non-bulky and bulky benzothiazoline ligands (thiolate precursors) were synthesized and their iron(II) complexes characterized. The use of non-bulky thiolate ligands and low-temperature crystallizations result in isolation of the dimeric species [(NNS)2Fe2(CO)2(I)2] (1), [(NPhNS)2Fe2(CO)2(I)2] (2), and [(MeNNS)2Fe2(CO)2(I)2] (3), which exhibit dimerization via thiolato (μ2-S)2 bridges. In one particular case (unsubstituted NNS ligand), the pathway of decarbonylation and oxidation from 1 was crystallographically elucidated, via isolation of the half-bis-ligated monocarbonyl dimer [(NNS)3Fe2(CO)]I (4) and the fully decarbonylated and oxidized mononuclear [(NNS)2Fe]I (5). The transformations of dicarbonyl complexes (1, 2, and 3) to monocarbonyl complexes (4, 6, and 7) were monitored by UV/vis, demonstrating that 1 and 3 exhibit longer t1/2 (80 and 75 min, respectively) than 2 (30 min), which is attributed to distortion of the ligand backbone. Density functional theory calculations of isolated complexes and putative intermediates were used to corroborate the experimentally observed IR spectra. Finally, dimerization was prevented using a bulky ligand featuring a 2,6-dimethylphenyl substituent, which affords mononuclear iron dicarbonyl complex, [(NPhNSDMPh)Fe(CO)2Br] (8), identified by IR and NMR spectroscopies. The dicarbonyl complex decomposes to the decarbonylated [(NPhNSDMPh)2Fe] (9) within minutes at room temperature. Overall, the work herein demonstrates that the thiolate moiety does not impart thermal stability to the {Fe(CO)2}2+ unit formed in the active site, further indicating the importance of the organometallic Fe-C(acyl) bond in the enzyme.
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Affiliation(s)
- Zhu-Lin Xie
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Doran L Pennington
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Dylan G Boucher
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - James Lo
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Michael J Rose
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
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