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Wagner P, Rominger F, Gross JH, Mastalerz M. Solvent-Controlled Quadruple Catenation of Giant Chiral [8+12] Salicylimine Cubes Driven by Weak Hydrogen Bonding. Angew Chem Int Ed Engl 2023; 62:e202217251. [PMID: 36695113 DOI: 10.1002/anie.202217251] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/19/2023] [Accepted: 01/24/2023] [Indexed: 01/26/2023]
Abstract
Mechanically interlocked structures are fascinating synthetic targets and the topological complexity achieved through catenation offers numerous possibilities for the construction of new molecules with exciting properties. In the structural space of catenated organic cage molecules, only few examples have been realized so far, and control over the catenation process in solution is still barely achieved. Herein, we describe the formation of a quadruply interlocked catenane of giant chiral [8+12] salicylimine cubes. The formation could be controlled by the choice of solvent used in the reaction. The interlocked structure was unambiguously characterized by single crystal X-ray diffraction and weak hydrogen bonding was identified as a central driving force for the catenation. Furthermore, scrambling experiments using partially deuterated cages were performed, revealing that the catenane formation occurs through mechanical interlocking of preformed single cages.
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Affiliation(s)
- Philippe Wagner
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Jürgen H Gross
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Michael Mastalerz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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2
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Topological Catenation Enhances Elastic Modulus of Single Linear Polycatenane. CHINESE JOURNAL OF POLYMER SCIENCE 2023. [DOI: 10.1007/s10118-023-2902-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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3
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Ye Q, Lin X, Wang T, Cui Y, Jiang H, Lu Y. Programmable protein topology via
SpyCatcher‐SpyTag
chemistry in one‐pot cell‐free expression system. Protein Sci 2022; 31:e4335. [DOI: 10.1002/pro.4335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/02/2022] [Accepted: 05/03/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Qingning Ye
- Key Laboratory of Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering Tsinghua University Beijing China
- College of New Energy and Materials China University of Petroleum Beijing China
| | - Xiaomei Lin
- Key Laboratory of Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering Tsinghua University Beijing China
| | - Ting Wang
- Key Laboratory of Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering Tsinghua University Beijing China
| | - Yuntao Cui
- Key Laboratory of Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering Tsinghua University Beijing China
| | - Hao Jiang
- School of Materials Science and Engineering Beijing Institute of Technology Beijing China
| | - Yuan Lu
- Key Laboratory of Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering Tsinghua University Beijing China
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4
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5
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Zhang G, Zhang J. Topological catenation induced swelling of ring polymers revealed by molecular dynamics simulation. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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6
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Da X, Zhang W. Active Template Synthesis of Protein Heterocatenanes. Angew Chem Int Ed Engl 2019; 58:11097-11104. [DOI: 10.1002/anie.201904943] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Xiao‐Di Da
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Polymer Chemistry & Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking University Beijing 100871 P. R. China
| | - Wen‐Bin Zhang
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Polymer Chemistry & Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking University Beijing 100871 P. R. China
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7
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Affiliation(s)
- Xiao‐Di Da
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Polymer Chemistry & Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking University Beijing 100871 P. R. China
| | - Wen‐Bin Zhang
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Polymer Chemistry & Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking University Beijing 100871 P. R. China
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8
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Danon JJ, Leigh DA, Pisano S, Valero A, Vitorica‐Yrezabal IJ. A Six-Crossing Doubly Interlocked [2]Catenane with Twisted Rings, and a Molecular Granny Knot. Angew Chem Int Ed Engl 2018; 57:13833-13837. [PMID: 30152565 PMCID: PMC6221036 DOI: 10.1002/anie.201807135] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 08/13/2018] [Indexed: 11/17/2022]
Abstract
A molecular 6 2 3 link (a six crossing, doubly interlocked, [2]catenane with twisted rings) and a 31 #31 granny knot (a composite knot made up of two trefoil tangles of the same handedness) were constructed by ring-closing olefin metathesis of an iron(II)-coordinated 2×2 interwoven grid. The connections were directed by pendant phenyl groups to be between proximal ligand ends on the same faces of the grid. The 6 2 3 link was separated from the topoisomeric granny knot by recycling size-exclusion chromatography. The identity of each topoisomer was determined by tandem mass spectrometry and the structure of the 6 2 3 link confirmed by X-ray crystallography, which revealed two 82-membered macrocycles, each in figure-of-eight conformations, linked through both pairs of loops.
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Affiliation(s)
- Jonathan J. Danon
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - David A. Leigh
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Simone Pisano
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Alberto Valero
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
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9
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Wang XW, Zhang WB. Chemical Topology and Complexity of Protein Architectures. Trends Biochem Sci 2018; 43:806-817. [DOI: 10.1016/j.tibs.2018.07.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 07/01/2018] [Accepted: 07/03/2018] [Indexed: 12/16/2022]
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10
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Danon JJ, Leigh DA, Pisano S, Valero A, Vitorica‐Yrezabal IJ. A Six‐Crossing Doubly Interlocked [2]Catenane with Twisted Rings, and a Molecular Granny Knot. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807135] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jonathan J. Danon
- School of ChemistryUniversity of Manchester Oxford Road Manchester M13 9PL UK
| | - David A. Leigh
- School of ChemistryUniversity of Manchester Oxford Road Manchester M13 9PL UK
| | - Simone Pisano
- School of ChemistryUniversity of Manchester Oxford Road Manchester M13 9PL UK
| | - Alberto Valero
- School of ChemistryUniversity of Manchester Oxford Road Manchester M13 9PL UK
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11
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Rauch M, Parkin G. Insertion of CS2into the Mg–H bond: synthesis and structural characterization of the magnesium dithioformate complex, [TismPriBenz]Mg(κ2-S2CH). Dalton Trans 2018; 47:12596-12605. [DOI: 10.1039/c8dt01947a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Insertion of CS2into the Mg–H bond of [TismPriBenz]MgH affords [TismPriBenz]Mg(κ2-S2CH), the first structurally characterized magnesium dithioformate compound.
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Affiliation(s)
- Michael Rauch
- Department of Chemistry
- Columbia University
- New York
- USA
| | - Gerard Parkin
- Department of Chemistry
- Columbia University
- New York
- USA
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12
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13
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Abstract
Peroxiredoxins (Prxs) are a large and conserved family of peroxidases that are considered to be the primary cellular guardians against oxidative stress in all living organisms. Prxs share a thioredoxin fold and contain a highly-reactive peroxidatic cysteine in a specialised active-site environment that is able to reduce their peroxide substrates. The minimal functional unit for Prxs are either monomers or dimers, but many dimers assemble into decameric rings. Ring structures can further form a variety of high molecular weight complexes. Many eukaryotic Prxs contain a conserved GGLG and C-terminal YF motif that confer sensitivity to elevated levels of peroxide, leading to hyperoxidation and inactivation. Inactive forms of Prxs can be re-reduced by the enzyme sulfiredoxin, in an ATP-dependent reaction. Cycles of hyperoxidation and reactivation are considered to play an integral role in a variety of H2O2-mediated cell signalling pathways in both stress and non-stress conditions. Prxs are also considered to exhibit chaperone-like properties when cells are under oxidative or thermal stress. The roles of various types of covalent modifications, e.g. acetylation and phosphorylation are also discussed. The ability of Prxs to assemble into ordered arrays such as nanotubes is currently being exploited in nanotechnology.
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Affiliation(s)
- Zhenbo Cao
- Institute of Molecular, Cell and Systems Biology, Davidson Building, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - John Gordon Lindsay
- Institute of Molecular, Cell and Systems Biology, Davidson Building, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK.
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14
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Pieters BJGE, van Eldijk MB, Nolte RJM, Mecinović J. Natural supramolecular protein assemblies. Chem Soc Rev 2016; 45:24-39. [PMID: 26497225 DOI: 10.1039/c5cs00157a] [Citation(s) in RCA: 238] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Supramolecular protein assemblies are an emerging area within the chemical sciences, which combine the topological structures of the field of supramolecular chemistry and the state-of-the-art chemical biology approaches to unravel the formation and function of protein assemblies. Recent chemical and biological studies on natural multimeric protein structures, including fibers, rings, tubes, catenanes, knots, and cages, have shown that the quaternary structures of proteins are a prerequisite for their highly specific biological functions. In this review, we illustrate that a striking structural diversity of protein assemblies is present in nature. Furthermore, we describe structure-function relationship studies for selected classes of protein architectures, and we highlight the techniques that enable the characterisation of supramolecular protein structures.
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Affiliation(s)
- Bas J G E Pieters
- Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
| | - Mark B van Eldijk
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA
| | - Roeland J M Nolte
- Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
| | - Jasmin Mecinović
- Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
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15
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Mikhailov VA, Liko I, Mize TH, Bush MF, Benesch JLP, Robinson CV. Infrared Laser Activation of Soluble and Membrane Protein Assemblies in the Gas Phase. Anal Chem 2016; 88:7060-7. [PMID: 27328020 DOI: 10.1021/acs.analchem.6b00645] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Collision-induced dissociation (CID) is the dominant method for probing intact macromolecular complexes in the gas phase by means of mass spectrometry (MS). The energy obtained from collisional activation is dependent on the charge state of the ion and the pressures and potentials within the instrument: these factors limit CID capability. Activation by infrared (IR) laser radiation offers an attractive alternative as the radiation energy absorbed by the ions is charge-state-independent and the intensity and time scale of activation is controlled by a laser source external to the mass spectrometer. Here we implement and apply IR activation, in different irradiation regimes, to study both soluble and membrane protein assemblies. We show that IR activation using high-intensity pulsed lasers is faster than collisional and radiative cooling and requires much lower energy than continuous IR irradiation. We demonstrate that IR activation is an effective means for studying membrane protein assemblies, and liberate an intact V-type ATPase complex from detergent micelles, a result that cannot be achieved by means of CID using standard collision energies. Notably, we find that IR activation can be sufficiently soft to retain specific lipids bound to the complex. We further demonstrate that, by applying a combination of collisional activation, mass selection, and IR activation of the liberated complex, we can elucidate subunit stoichiometry and the masses of specifically bound lipids in a single MS experiment.
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Affiliation(s)
- Victor A Mikhailov
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford , Oxford, OX1 3QZ, United Kingdom
| | - Idlir Liko
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford , Oxford, OX1 3QZ, United Kingdom
| | - Todd H Mize
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford , Oxford, OX1 3QZ, United Kingdom
| | - Matthew F Bush
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford , Oxford, OX1 3QZ, United Kingdom
| | - Justin L P Benesch
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford , Oxford, OX1 3QZ, United Kingdom
| | - Carol V Robinson
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford , Oxford, OX1 3QZ, United Kingdom
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16
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Affiliation(s)
- Xiao-Wei Wang
- Key Laboratory of Polymer Chemistry & Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 P.R. China
| | - Wen-Bin Zhang
- Key Laboratory of Polymer Chemistry & Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 P.R. China
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17
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Wang XW, Zhang WB. Cellular Synthesis of Protein Catenanes. Angew Chem Int Ed Engl 2016; 55:3442-6. [DOI: 10.1002/anie.201511640] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Xiao-Wei Wang
- Key Laboratory of Polymer Chemistry & Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 P.R. China
| | - Wen-Bin Zhang
- Key Laboratory of Polymer Chemistry & Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 P.R. China
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18
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Beves JE, Danon JJ, Leigh DA, Lemonnier JF, Vitorica-Yrezabal IJ. A Solomon link through an interwoven molecular grid. Angew Chem Int Ed Engl 2015; 54:7555-9. [PMID: 25960366 PMCID: PMC4479027 DOI: 10.1002/anie.201502095] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Indexed: 11/21/2022]
Abstract
A molecular Solomon link was synthesized through the assembly of an interwoven molecular grid consisting of four bis(benzimidazolepyridyl)benzthiazolo[5,4-d]thiazole ligands and four zinc(II), iron(II), or cobalt(II) cations, followed by ring-closing olefin metathesis. NMR spectroscopy, mass spectrometry, and X-ray crystallography confirmed the doubly interlocked topology, and subsequent demetalation afforded the wholly organic Solomon link. The synthesis, in which each metal ion defines the crossing point of two ligand strands, suggests that interwoven molecular grids should be useful scaffolds for the rational construction of other topologically complex structures.
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Affiliation(s)
- Jonathon E Beves
- School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh, EH9 3JJ (UK)
| | - Jonathan J Danon
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL (UK) http://www.catenane.net
| | - David A Leigh
- School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh, EH9 3JJ (UK).
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL (UK) http://www.catenane.net.
| | - Jean-François Lemonnier
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL (UK) http://www.catenane.net
| | - Iñigo J Vitorica-Yrezabal
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL (UK) http://www.catenane.net
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19
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Wang JCY, Zlotnick A, Mecinović J. Transmission electron microscopy enables the reconstruction of the catenane and ring forms of CS2 hydrolase. Chem Commun (Camb) 2015; 50:10281-3. [PMID: 25056142 DOI: 10.1039/c4cc04650a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transmission electron microscopic studies on CS2 hydrolase provide direct evidence for the existence of the hexadecameric catenane and octameric ring topologies. Reconstructions of both protein assemblies are in good agreement with crystallographic analyses of the catenane and ring forms of CS2 hydrolase.
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Affiliation(s)
- Joseph Che-Yen Wang
- Molecular & Cellular Biochemistry Department, Simon Hall 217, 212 S. Hawthorne Drive, Indiana University, Bloomington, IN 47405, USA.
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20
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Gil-Ramírez G, Leigh DA, Stephens AJ. Catenanes: fifty years of molecular links. Angew Chem Int Ed Engl 2015; 54:6110-50. [PMID: 25951013 PMCID: PMC4515087 DOI: 10.1002/anie.201411619] [Citation(s) in RCA: 381] [Impact Index Per Article: 42.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Indexed: 02/06/2023]
Abstract
Half a century after Schill and Lüttringhaus carried out the first directed synthesis of a [2]catenane, a plethora of strategies now exist for the construction of molecular Hopf links (singly interlocked rings), the simplest type of catenane. The precision and effectiveness with which suitable templates and/or noncovalent interactions can arrange building blocks has also enabled the synthesis of intricate and often beautiful higher order interlocked systems, including Solomon links, Borromean rings, and a Star of David catenane. This Review outlines the diverse strategies that exist for synthesizing catenanes in the 21st century and examines their emerging applications and the challenges that still exist for the synthesis of more complex topologies.
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Affiliation(s)
- Guzmán Gil-Ramírez
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL (UK) http://www.catenane.net
| | - David A Leigh
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL (UK) http://www.catenane.net.
| | - Alexander J Stephens
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL (UK) http://www.catenane.net
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21
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Beves JE, Danon JJ, Leigh DA, Lemonnier JF, Vitorica-Yrezabal IJ. A Solomon Link through an Interwoven Molecular Grid. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502095] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Gil-Ramírez G, Leigh DA, Stephens AJ. Catenane: fünfzig Jahre molekulare Verschlingungen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411619] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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23
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Cao Z, McGow DP, Shepherd C, Lindsay JG. Improved Catenated Structures of Bovine Peroxiredoxin III F190L Reveal Details of Ring-Ring Interactions and a Novel Conformational State. PLoS One 2015; 10:e0123303. [PMID: 25906064 PMCID: PMC4407889 DOI: 10.1371/journal.pone.0123303] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 03/03/2015] [Indexed: 11/19/2022] Open
Abstract
Mitochondrial 2-cys peroxiredoxin III (PrxIII) is a key player in antioxidant defence reducing locally-generated H2O2 to H2O. A Phe to Leu (F190L) mutation in the C-terminal α-helix of PrxIII, mimicking that found in some bacteria and parasites, increases its resistance to hyperoxidation but has no obvious influence on peroxidase activity. Here we report on the oxidized and reduced crystal structures of bovine PrxIII F190L at 2.4 Å and 2.2 Å, respectively. Both structures exist as two-ring catenanes with their dodecameric rings inclined at 55o to each other, similar to that previously reported for PrxIII C168S. The new higher-resolution structures reveal details of the complex network of H-bonds stabilising the inter-toroid contacts. In addition, Arg123, the key conserved residue, that normally interacts with the catalytic cys (Cp, cys 47) is found in a distinct conformation extending away from the Cp while the characteristic Arg-Glu-Arg network, underpinning the active-site geometry also displays a distinctive arrangement, not observed previously. This novel active-site organisation may provide new insights into the dynamics of the large-scale conformational changes occurring between oxidized and reduced states.
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Affiliation(s)
- Zhenbo Cao
- From the Institute of Molecular, Cell and Systems Biology, CMVLS, University of Glasgow, Glasgow, United Kingdom
| | - Donna P. McGow
- From the Institute of Molecular, Cell and Systems Biology, CMVLS, University of Glasgow, Glasgow, United Kingdom
| | - Colin Shepherd
- From the Institute of Molecular, Cell and Systems Biology, CMVLS, University of Glasgow, Glasgow, United Kingdom
| | - J. Gordon Lindsay
- From the Institute of Molecular, Cell and Systems Biology, CMVLS, University of Glasgow, Glasgow, United Kingdom
- * E-mail:
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van Eldijk MB, Pieters BJ, Mikhailov VA, Robinson CV, van Hest JCM, Mecinović J. Catenane versus ring: do both assemblies of CS2 hydrolase exhibit the same stability and catalytic activity? Chem Sci 2014. [DOI: 10.1039/c4sc00059e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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25
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Bacterial CS2 hydrolases from Acidithiobacillus thiooxidans strains are homologous to the archaeal catenane CS2 hydrolase. J Bacteriol 2013; 195:4046-56. [PMID: 23836868 DOI: 10.1128/jb.00627-13] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Carbon disulfide (CS(2)) and carbonyl sulfide (COS) are important in the global sulfur cycle, and CS(2) is used as a solvent in the viscose industry. These compounds can be converted by sulfur-oxidizing bacteria, such as Acidithiobacillus thiooxidans species, to carbon dioxide (CO(2)) and hydrogen sulfide (H2S), a property used in industrial biofiltration of CS(2)-polluted airstreams. We report on the mechanism of bacterial CS(2) conversion in the extremely acidophilic A. thiooxidans strains S1p and G8. The bacterial CS(2) hydrolases were highly abundant. They were purified and found to be homologous to the only other described (archaeal) CS(2) hydrolase from Acidianus strain A1-3, which forms a catenane of two interlocked rings. The enzymes cluster in a group of β-carbonic anhydrase (β-CA) homologues that may comprise a subclass of CS(2) hydrolases within the β-CA family. Unlike CAs, the CS(2) hydrolases did not hydrate CO(2) but converted CS(2) and COS with H(2)O to H(2)S and CO(2). The CS(2) hydrolases of A. thiooxidans strains G8, 2Bp, Sts 4-3, and BBW1, like the CS(2) hydrolase of Acidianus strain A1-3, exist as both octamers and hexadecamers in solution. The CS(2) hydrolase of A. thiooxidans strain S1p forms only octamers. Structure models of the A. thiooxidans CS(2) hydrolases based on the structure of Acidianus strain A1-3 CS(2) hydrolase suggest that the A. thiooxidans strain G8 CS(2) hydrolase may also form a catenane. In the A. thiooxidans strain S1p enzyme, two insertions (positions 26 and 27 [PD] and positions 56 to 61 [TPAGGG]) and a nine-amino-acid-longer C-terminal tail may prevent catenane formation.
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