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Rattu P, Belzunces B, Haynes T, Skylaris CK, Khalid S. Translocation of flexible and tensioned ssDNA through in silico designed hydrophobic nanopores with two constrictions. NANOSCALE 2021; 13:1673-1679. [PMID: 33434242 DOI: 10.1039/d0nr04890a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Protein-inspired nanopores with hydrophobic constriction regions have previously been shown to offer some promise for DNA sequencing. Here we explore a series of pores with two hydrophobic constrictions. The impact of nanopore radius, the nature of residues that define the constriction region and the flexibility of the ssDNA is explored. Our results show that aromatic residues slow down DNA translocation, and in the case of short DNA strands, they cause deviations from a linear DNA conformation. When DNA is under tension, translocation is once again slower when aromatic residues are present in the constriction. However, the lack of flexibility in the DNA backbone provides a narrower window of opportunity for the DNA bases to be retained inside the pore via interaction with the aromatic residues, compared to more flexible strands. Consequently, there is more variability in translocation rates for strands under tension. DNA entry into the pores is correlated to pore width, but no such correlation between width and translocation rate is observed.
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Affiliation(s)
- Punam Rattu
- School of Chemistry, University of Southampton, Highfield Campus, Southampton, SO17 1BJ, UK.
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52
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Gundelach L, Fox T, Tautermann CS, Skylaris CK. Protein–ligand free energies of binding from full-protein DFT calculations: convergence and choice of exchange–correlation functional. Phys Chem Chem Phys 2021; 23:9381-9393. [DOI: 10.1039/d1cp00206f] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantum mechanical binding free energies based on thousands of full-protein DFT calculations are tractable, reproducible and converge well.
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Affiliation(s)
- Lennart Gundelach
- University of Southampton Faculty of Engineering Science and Mathematics, Chemistry
- University Road
- Southampton
- UK
| | - Thomas Fox
- Boehringer Ingelheim Pharma GmbH & Co KG
- Medicinal Chemistry
- 88397 Biberach an der Riss
- Germany
| | | | - Chris-Kriton Skylaris
- University of Southampton Faculty of Engineering Science and Mathematics, Chemistry
- University Road
- Southampton
- UK
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Abstract
The unprecedented ability of computations to probe atomic-level details of catalytic systems holds immense promise for the fundamentals-based bottom-up design of novel heterogeneous catalysts, which are at the heart of the chemical and energy sectors of industry. Here, we critically analyze recent advances in computational heterogeneous catalysis. First, we will survey the progress in electronic structure methods and atomistic catalyst models employed, which have enabled the catalysis community to build increasingly intricate, realistic, and accurate models of the active sites of supported transition-metal catalysts. We then review developments in microkinetic modeling, specifically mean-field microkinetic models and kinetic Monte Carlo simulations, which bridge the gap between nanoscale computational insights and macroscale experimental kinetics data with increasing fidelity. We finally review the advancements in theoretical methods for accelerating catalyst design and discovery. Throughout the review, we provide ample examples of applications, discuss remaining challenges, and provide our outlook for the near future.
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Affiliation(s)
- Benjamin W J Chen
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Lang Xu
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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54
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Mao Y, Loipersberger M, Kron KJ, Derrick JS, Chang CJ, Sharada SM, Head-Gordon M. Consistent inclusion of continuum solvation in energy decomposition analysis: theory and application to molecular CO 2 reduction catalysts. Chem Sci 2020; 12:1398-1414. [PMID: 34163903 PMCID: PMC8179122 DOI: 10.1039/d0sc05327a] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
To facilitate computational investigation of intermolecular interactions in the solution phase, we report the development of ALMO-EDA(solv), a scheme that allows the application of continuum solvent models within the framework of energy decomposition analysis (EDA) based on absolutely localized molecular orbitals (ALMOs). In this scheme, all the quantum mechanical states involved in the variational EDA procedure are computed with the presence of solvent environment so that solvation effects are incorporated in the evaluation of all its energy components. After validation on several model complexes, we employ ALMO-EDA(solv) to investigate substituent effects on two classes of complexes that are related to molecular CO2 reduction catalysis. For [FeTPP(CO2-κC)]2- (TPP = tetraphenylporphyrin), we reveal that two ortho substituents which yield most favorable CO2 binding, -N(CH3)3 + (TMA) and -OH, stabilize the complex via through-structure and through-space mechanisms, respectively. The coulombic interaction between the positively charged TMA group and activated CO2 is found to be largely attenuated by the polar solvent. Furthermore, we also provide computational support for the design strategy of utilizing bulky, flexible ligands to stabilize activated CO2 via long-range Coulomb interactions, which creates biomimetic solvent-inaccessible "pockets" in that electrostatics is unscreened. For the reactant and product complexes associated with the electron transfer from the p-terphenyl radical anion to CO2, we demonstrate that the double terminal substitution of p-terphenyl by electron-withdrawing groups considerably strengthens the binding in the product state while moderately weakens that in the reactant state, which are both dominated by the substituent tuning of the electrostatics component. These applications illustrate that this new extension of ALMO-EDA provides a valuable means to unravel the nature of intermolecular interactions and quantify their impacts on chemical reactivity in solution.
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Affiliation(s)
- Yuezhi Mao
- Department of Chemistry, University of California at Berkeley Berkeley CA 94720 USA
| | | | - Kareesa J Kron
- Mork Family Department of Chemical Engineering and Material Science, University of Southern California Los Angeles CA 90089 USA
| | - Jeffrey S Derrick
- Department of Chemistry, University of California at Berkeley Berkeley CA 94720 USA
| | - Christopher J Chang
- Department of Chemistry, University of California at Berkeley Berkeley CA 94720 USA .,Chemical Sciences Division, Lawrence Berkeley National Laboratory Berkeley CA 94720 USA.,Department of Molecular and Cell Biology, University of California Berkeley Berkeley CA 94720 USA
| | - Shaama Mallikarjun Sharada
- Mork Family Department of Chemical Engineering and Material Science, University of Southern California Los Angeles CA 90089 USA.,Department of Chemistry, University of Southern California Los Angeles CA 90089 USA
| | - Martin Head-Gordon
- Department of Chemistry, University of California at Berkeley Berkeley CA 94720 USA .,Chemical Sciences Division, Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
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55
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Bhandari A, Anton L, Dziedzic J, Peng C, Kramer D, Skylaris CK. Electronic structure calculations in electrolyte solutions: Methods for neutralization of extended charged interfaces. J Chem Phys 2020; 153:124101. [DOI: 10.1063/5.0021210] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Arihant Bhandari
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, United Kingdom
| | - Lucian Anton
- CCFE, Culham Science Centre, Abingdon, United Kingdom
| | - Jacek Dziedzic
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, United Kingdom
- Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Gdańsk 80-233, Poland
| | - Chao Peng
- The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, United Kingdom
- Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Denis Kramer
- The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, United Kingdom
- Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
- Helmut-Schmidt-University, University of the Armed Forces, 22043 Hamburg, Germany
| | - Chris-Kriton Skylaris
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
- The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, United Kingdom
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56
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Sherrill CD, Manolopoulos DE, Martínez TJ, Michaelides A. Electronic structure software. J Chem Phys 2020; 153:070401. [DOI: 10.1063/5.0023185] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- C. David Sherrill
- Center for Computational Molecular Science and Technology, School of Chemistry and Biochemistry, and School of Computational Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia
30332-0400, USA
| | - David E. Manolopoulos
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, Oxford University, South Parks Road, Oxford OX1
3QZ, United Kingdom
| | - Todd J. Martínez
- Department of Chemistry and the PULSE Institute, Stanford University, Stanford, California 94305,
USA
| | - Angelos Michaelides
- Thomas Young Centre, London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
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Linscott EB, Cole DJ, Hine NDM, Payne MC, Weber C. ONETEP + TOSCAM: Uniting Dynamical Mean Field Theory and Linear-Scaling Density Functional Theory. J Chem Theory Comput 2020; 16:4899-4911. [PMID: 32433876 DOI: 10.1021/acs.jctc.0c00162] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We introduce the unification of dynamical mean field theory (DMFT) and linear-scaling density functional theory (DFT), as recently implemented in ONETEP, a linear-scaling DFT package, and TOSCAM, a DMFT toolbox. This code can account for strongly correlated electronic behavior while simultaneously including the effects of the environment, making it ideally suited for studying complex and heterogeneous systems that contain transition metals and lanthanides, such as metalloproteins. We systematically introduce the necessary formalism, which must account for the nonorthogonal basis set used by ONETEP. In order to demonstrate the capabilities of this code, we apply it to carbon monoxide ligated iron porphyrin and explore the distinctly quantum-mechanical character of the iron 3d electrons during the process of photodissociation.
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Affiliation(s)
- Edward B Linscott
- Theory and Simulation of Materials (THEOS), École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Daniel J Cole
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - Nicholas D M Hine
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Michael C Payne
- Theory of Condensed Matter, Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Cédric Weber
- Theory and Simulation of Condensed Matter, King's College London, The Strand, London WC2R 2LS, United Kingdom
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