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Hoteite L, Allen BDW, Elhajj MEA, Meijer AJHM, Harrity JPA. A Pd-Catalyzed Annulation Strategy to Linearly Fused Functionalized N-Heterocycles. Chemistry 2024; 30:e202400116. [PMID: 38318755 DOI: 10.1002/chem.202400116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/05/2024] [Accepted: 02/05/2024] [Indexed: 02/07/2024]
Abstract
Linearly fused polycyclic piperidines represent common substructures in natural products and biologically active small molecules. We have devised a Pd-catalyzed annulation strategy to these compounds that converts readily available 2-tetralones and indanones into these scaffolds with the potential for control of both enantio- and diastereoselectivity. Importantly, these compounds can be chemoselectively functionalized, providing an efficient and robust methodology to these important nitrogen-containing molecules.
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Affiliation(s)
- Larry Hoteite
- The Department of Chemistry, The University of Sheffield, Sheffield, S3 7HF, U.K
| | - Benjamin D W Allen
- The Department of Chemistry, The University of Sheffield, Sheffield, S3 7HF, U.K
| | - Ms Ergaiya A Elhajj
- The Department of Chemistry, The University of Sheffield, Sheffield, S3 7HF, U.K
| | - Anthony J H M Meijer
- The Department of Chemistry, The University of Sheffield, Sheffield, S3 7HF, U.K
| | - Joseph P A Harrity
- The Department of Chemistry, The University of Sheffield, Sheffield, S3 7HF, U.K
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2
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Hőgye F, Farkas LB, Balogh ÁK, Szilágyi L, Alnukari S, Bajza I, Borbás A, Fehér K, Illyés TZ, Timári I. Saturation Transfer Difference NMR and Molecular Docking Interaction Study of Aralkyl-Thiodigalactosides as Potential Inhibitors of the Human-Galectin-3 Protein. Int J Mol Sci 2024; 25:1742. [PMID: 38339036 PMCID: PMC10855533 DOI: 10.3390/ijms25031742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/12/2024] Open
Abstract
Human Galectin-3 (hGal-3) is a protein that selectively binds to β-galactosides and holds diverse roles in both normal and pathological circumstances. Therefore, targeting hGal-3 has become a vibrant area of research in the pharmaceutical chemistry. As a step towards the development of novel hGal-3 inhibitors, we synthesized and investigated derivatives of thiodigalactoside (TDG) modified with different aromatic substituents. Specifically, we describe a high-yielding synthetic route of thiodigalactoside (TDG); an optimized procedure for the synthesis of the novel 3,3'-di-O-(quinoline-2-yl)methyl)-TDG and three other known, symmetric 3,3'-di-O-TDG derivatives ((naphthalene-2yl)methyl, benzyl, (7-methoxy-2H-1-benzopyran-2-on-4-yl)methyl). In the present study, using competition Saturation Transfer Difference (STD) NMR spectroscopy, we determined the dissociation constant (Kd) of the former three TDG derivatives produced to characterize the strength of the interaction with the target protein (hGal-3). Based on the Kd values determined, the (naphthalen-2-yl)methyl, the (quinolin-2-yl)methyl and the benzyl derivatives bind to hGal-3 94, 30 and 24 times more strongly than TDG. Then, we studied the binding modes of the derivatives in silico by molecular docking calculations. Docking poses similar to the canonical binding modes of well-known hGal-3 inhibitors have been found. However, additional binding forces, cation-π interactions between the arginine residues in the binding pocket of the protein and the aromatic groups of the ligands, have been established as significant features. Our results offer a molecular-level understanding of the varying affinities observed among the synthesized thiodigalactoside derivatives, which can be a key aspect in the future development of more effective ligands of hGal-3.
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Affiliation(s)
- Fanni Hőgye
- Department of Organic Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (F.H.); (L.B.F.); (L.S.)
| | - László Bence Farkas
- Department of Organic Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (F.H.); (L.B.F.); (L.S.)
- HUN-REN-UD Molecular Recognition and Interaction Research Group, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Á.K.B.); (S.A.); (A.B.); (K.F.)
| | - Álex Kálmán Balogh
- HUN-REN-UD Molecular Recognition and Interaction Research Group, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Á.K.B.); (S.A.); (A.B.); (K.F.)
| | - László Szilágyi
- Department of Organic Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (F.H.); (L.B.F.); (L.S.)
| | - Samar Alnukari
- HUN-REN-UD Molecular Recognition and Interaction Research Group, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Á.K.B.); (S.A.); (A.B.); (K.F.)
| | - István Bajza
- GlycOptim Kft., Egyetem tér 1, H-4032 Debrecen, Hungary;
| | - Anikó Borbás
- HUN-REN-UD Molecular Recognition and Interaction Research Group, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Á.K.B.); (S.A.); (A.B.); (K.F.)
- Department of Pharmaceutical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Krisztina Fehér
- HUN-REN-UD Molecular Recognition and Interaction Research Group, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Á.K.B.); (S.A.); (A.B.); (K.F.)
| | - Tünde Zita Illyés
- Department of Organic Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (F.H.); (L.B.F.); (L.S.)
| | - István Timári
- Department of Organic Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (F.H.); (L.B.F.); (L.S.)
- HUN-REN-UD Molecular Recognition and Interaction Research Group, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Á.K.B.); (S.A.); (A.B.); (K.F.)
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3
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Zuccarello G, Nannini LJ, Arroyo-Bondía A, Fincias N, Arranz I, Pérez-Jimeno AH, Peeters M, Martín-Torres I, Sadurní A, García-Vázquez V, Wang Y, Kirillova MS, Montesinos-Magraner M, Caniparoli U, Núñez GD, Maseras F, Besora M, Escofet I, Echavarren AM. Enantioselective Catalysis with Pyrrolidinyl Gold(I) Complexes: DFT and NEST Analysis of the Chiral Binding Pocket. JACS AU 2023; 3:1742-1754. [PMID: 37388697 PMCID: PMC10301678 DOI: 10.1021/jacsau.3c00159] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 05/10/2023] [Accepted: 05/12/2023] [Indexed: 07/01/2023]
Abstract
A new generation of chiral gold(I) catalysts based on variations of complexes with JohnPhos-type ligands with a remote C2-symmetric 2,5-diarylpyrrolidine have been synthesized with different substitutions at the top and bottom aryl rings: from replacing the phosphine by a N-heterocyclic carbene (NHC) to increasing the steric hindrance with bis- or tris-biphenylphosphine scaffolds, or by directly attaching the C2-chiral pyrrolidine in the ortho-position of the dialkylphenyl phosphine. The new chiral gold(I) catalysts have been tested in the intramolecular [4+2] cycloaddition of arylalkynes with alkenes and in the atroposelective synthesis of 2-arylindoles. Interestingly, simpler catalysts with the C2-chiral pyrrolidine in the ortho-position of the dialkylphenyl phosphine led to the formation of opposite enantiomers. The chiral binding pockets of the new catalysts have been analyzed by DFT calculations. As revealed by non-covalent interaction plots, attractive non-covalent interactions between substrates and catalysts direct specific enantioselective folding. Furthermore, we have introduced the open-source tool NEST, specifically designed to account for steric effects in cylindrical-shaped complexes, which allows predicting experimental enantioselectivities in our systems.
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Affiliation(s)
- Giuseppe Zuccarello
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
| | - Leonardo J. Nannini
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
| | - Ana Arroyo-Bondía
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, Tarragona 43007, Spain
| | - Nicolás Fincias
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
| | - Isabel Arranz
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, Tarragona 43007, Spain
| | - Alba H. Pérez-Jimeno
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, Tarragona 43007, Spain
| | - Matthias Peeters
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
| | - Inmaculada Martín-Torres
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
| | - Anna Sadurní
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
| | - Víctor García-Vázquez
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
| | - Yufei Wang
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
| | - Mariia S. Kirillova
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
| | - Marc Montesinos-Magraner
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
| | - Ulysse Caniparoli
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, Tarragona 43007, Spain
| | - Gonzalo D. Núñez
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, Tarragona 43007, Spain
| | - Feliu Maseras
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, Tarragona 43007, Spain
| | - Maria Besora
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, Tarragona 43007, Spain
| | - Imma Escofet
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, Tarragona 43007, Spain
| | - Antonio M. Echavarren
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), Barcelona Institute
of Science and Technology, Av. Països Catalans 16, Tarragona 43007, Spain
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, Tarragona 43007, Spain
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Bracun L, Yamagata A, Christianson BM, Shirouzu M, Liu LN. Cryo-EM structure of a monomeric RC-LH1-PufX supercomplex with high-carotenoid content from Rhodobacter capsulatus. Structure 2023; 31:318-328.e3. [PMID: 36738736 DOI: 10.1016/j.str.2023.01.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/30/2022] [Accepted: 01/11/2023] [Indexed: 02/05/2023]
Abstract
In purple photosynthetic bacteria, the photochemical reaction center (RC) and light-harvesting complex 1 (LH1) assemble to form monomeric or dimeric RC-LH1 membrane complexes, essential for bacterial photosynthesis. Here, we report a 2.59-Å resolution cryoelectron microscopy (cryo-EM) structure of the RC-LH1 supercomplex from Rhodobacter capsulatus. We show that Rba. capsulatus RC-LH1 complexes are exclusively monomers in which the RC is surrounded by a 15-subunit LH1 ring. Incorporation of a transmembrane polypeptide PufX leads to a large opening within the LH1 ring. Each LH1 subunit associates two carotenoids and two bacteriochlorophylls, which is similar to Rba. sphaeroides RC-LH1 but more than one carotenoid per LH1 in Rba. veldkampii RC-LH1 monomer. Collectively, the unique Rba. capsulatus RC-LH1-PufX represents an intermediate structure between Rba. sphaeroides and Rba. veldkampii RC-LH1-PufX. Comparison of PufX from the three Rhodobacter species indicates the important residues involved in dimerization of RC-LH1.
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Affiliation(s)
- Laura Bracun
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, UK; Laboratory for Protein Functional and Structural Biology, RIKEN Center for Biosystems Dynamics Research, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Atsushi Yamagata
- Laboratory for Protein Functional and Structural Biology, RIKEN Center for Biosystems Dynamics Research, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Bern M Christianson
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, UK
| | - Mikako Shirouzu
- Laboratory for Protein Functional and Structural Biology, RIKEN Center for Biosystems Dynamics Research, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Lu-Ning Liu
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, UK; College of Marine Life Sciences and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266003, China.
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5
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A combined experimental and theoretical study to demonstrate the importance of V2O4 synthon in the crystal packing of an oxo-bridged dinuclear vanadium(V) complex with V2O4 core. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Giannitelli SM, Limiti E, Mozetic P, Pinelli F, Han X, Abbruzzese F, Basoli F, Del Rio D, Scialla S, Rossi F, Trombetta M, Rosanò L, Gigli G, Zhang ZJ, Mauri E, Rainer A. Droplet-based microfluidic synthesis of nanogels for controlled drug delivery: tailoring nanomaterial properties via pneumatically actuated flow-focusing junction. NANOSCALE 2022; 14:11415-11428. [PMID: 35903969 DOI: 10.1039/d2nr00827k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Conventional batch syntheses of polymer-based nanoparticles show considerable shortcomings in terms of scarce control over nanomaterials morphology and limited lot-to-lot reproducibility. Droplet-based microfluidics represents a valuable strategy to overcome these constraints, exploiting the formation of nanoparticles within discrete microdroplets. In this work, we synthesized nanogels (NGs) composed of hyaluronic acid and polyethyleneimine using a microfluidic flow-focusing device endowed with a pressure-driven micro-actuator. The actuator achieves real-time modulation of the junction orifice width, thereby regulating the microdroplet diameter and, as a result, the NG size. Acting on process parameters, NG hydrodynamic diameter could be tuned in the range 92-190 nm while preserving an extremely low polydispersity (0.015); those values are hardly achievable in batch syntheses and underline the strength of our toolbox for the continuous in-flow synthesis of nanocarriers. Furthermore, NGs were validated in vitro as a drug delivery system in a representative case study still lacking an effective therapeutic treatment: ovarian cancer. Using doxorubicin as a chemotherapeutic agent, we show that NG-mediated release of the drug results in an enhanced antiblastic effect vs. the non-encapsulated administration route even at sublethal dosages, highlighting the wide applicability of our microfluidics-enabled nanomaterials in healthcare scenarios.
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Affiliation(s)
- Sara Maria Giannitelli
- Department of Engineering, Università Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy.
| | - Emanuele Limiti
- Department of Engineering, Università Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy.
| | - Pamela Mozetic
- Division of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific Institute, Via Olgettina, 60, 20132, Milan, Italy
- Institute of Nanotechnology (NANOTEC), National Research Council, via Monteroni, 73100, Lecce, Italy
| | - Filippo Pinelli
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, via L. Mancinelli 7, 20131 Milan, Italy
| | - Xiaoyu Han
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Franca Abbruzzese
- Department of Engineering, Università Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy.
| | - Francesco Basoli
- Department of Engineering, Università Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy.
| | - Danila Del Rio
- Institute of Molecular Biology and Pathology, National Research Council (CNR), via Degli Apuli 4, 00185 Rome, Italy
| | - Stefano Scialla
- Department of Engineering, Università Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy.
- National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
| | - Filippo Rossi
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, via L. Mancinelli 7, 20131 Milan, Italy
| | - Marcella Trombetta
- Department of Engineering, Università Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy.
| | - Laura Rosanò
- Institute of Molecular Biology and Pathology, National Research Council (CNR), via Degli Apuli 4, 00185 Rome, Italy
| | - Giuseppe Gigli
- Institute of Nanotechnology (NANOTEC), National Research Council, via Monteroni, 73100, Lecce, Italy
- Department of Mathematics and Physics "Ennio De Giorgi", Università del Salento, via per Arnesano, 73100 Lecce, Italy
| | - Zhenyu Jason Zhang
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Emanuele Mauri
- Department of Engineering, Università Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy.
| | - Alberto Rainer
- Department of Engineering, Università Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy.
- Institute of Nanotechnology (NANOTEC), National Research Council, via Monteroni, 73100, Lecce, Italy
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Cabaleiro-Lago EM, Rodríguez-Otero J, Vázquez SA. Electrostatic penetration effects stand at the heart of aromatic π interactions. Phys Chem Chem Phys 2022; 24:8979-8991. [PMID: 35380139 DOI: 10.1039/d2cp00714b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The nature of the interaction in benzene-containing dimers has been analysed by means of Symmetry Adapted Perturbation Theory (SAPT). The total interaction energy and the preference for the dimers to adopt slipped structures are, apparently, consequence of the balance between repulsion and dispersion. However, our results indicate that this only holds when trends are analysed using fixed intermolecular distances. Employing the most favourable separations between rings it turns out that the changes on the total interaction energy are mostly controlled by electrostatics, while repulsion and dispersion cancel each other to a great extent. Most of the electrostatic contribution is accounted for by electrostatic penetration, so a description based on multipoles should not be employed to rationalise the interaction in benzene-containing dimers. The changes on the interaction energy in benzene-containing dimers are steered by electrostatic penetration which, though often overlooked, plays an essential role for the description of aromatic π interactions.
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Affiliation(s)
- Enrique M Cabaleiro-Lago
- Facultade de Ciencias (Dpto. de Química Física), Universidade de Santiago de Compostela, Campus de Lugo. Avda. Alfonso X El Sabio s/n, 27002 Lugo, Galicia, Spain.
| | - Jesús Rodríguez-Otero
- Facultade de Química (Dpto. de Química Física), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain.
| | - Saulo A Vázquez
- Facultade de Química (Dpto. de Química Física), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain.
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8
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Tan SL, Cardoso LNF, de Souza MVN, Wardell SMSV, Wardell JL, Tiekink ERT. Experimental and computational evidence for stabilising parallel, offset π[C(O)N(H)NC]⋯π(phenyl) interactions in acetohydrazide derivatives. CrystEngComm 2022. [DOI: 10.1039/d1ce01492g] [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
Stabilising π[C(O)N(H)NC]⋯π(phenyl) interactions are described.
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Affiliation(s)
- Sang Loon Tan
- Research Centre for Crystalline Materials, School of Medical and Life Sciences, Sunway University, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Laura N. F. Cardoso
- Instituto de Tecnologia em Fármacos Farmanguinhos, FIOCRUZ Fundação Oswaldo Cruz, Rio de Janeiro 21041-250, Brazil
| | - Marcus V. N. de Souza
- Instituto de Tecnologia em Fármacos Farmanguinhos, FIOCRUZ Fundação Oswaldo Cruz, Rio de Janeiro 21041-250, Brazil
| | | | - James L. Wardell
- Department of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen, AB24 3UE, Scotland, UK
| | - Edward R. T. Tiekink
- Research Centre for Crystalline Materials, School of Medical and Life Sciences, Sunway University, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia
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9
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Unravelling the non-covalent interactions in certain n-propyl amine – Ether systems through acoustic and DFT studies at 303.15 K. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Abstract
Carbohydrate recognition is crucial for biological processes ranging from development to immune system function to host-pathogen interactions. The proteins that bind glycans are faced with a daunting task: to coax these hydrophilic species out of water and into a binding site. Here, we examine the forces underlying glycan recognition by proteins. Our previous bioinformatic study of glycan-binding sites indicated that the most overrepresented side chains are electron-rich aromatic residues, including tyrosine and tryptophan. These findings point to the importance of CH-π interactions for glycan binding. Studies of CH-π interactions show a strong dependence on the presence of an electron-rich π system, and the data indicate binding is enhanced by complementary electronic interactions between the electron-rich aromatic ring and the partial positive charge of the carbohydrate C-H protons. This electronic dependence means that carbohydrate residues with multiple aligned highly polarized C-H bonds, such as β-galactose, form strong CH-π interactions, whereas less polarized residues such as α-mannose do not. This information can guide the design of proteins to recognize sugars and the generation of ligands for proteins, small molecules, or catalysts that bind sugars.
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Affiliation(s)
- Laura L. Kiessling
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Roger C. Diehl
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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11
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Wititsuwannakul T, Hall MB, Gladysz JA. Computational Investigation of Dichloromethane Ligand Substitution in the Enantiopure Cation [(η5-C5H5)Re(NO)(PPh3)(ClCH2Cl)]+, a Functional Equivalent of a Chiral Lewis Acid. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Taveechai Wititsuwannakul
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - Michael B. Hall
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - John A. Gladysz
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
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12
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Small-angle X-ray scattering as an effective tool to understand the structure and rigidity of the reverse micelles with the variation of surfactant. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Carbohydrate – Protein aromatic ring interactions beyond CH/π interactions: A Protein Data Bank survey and quantum chemical calculations. Int J Biol Macromol 2020; 157:1-9. [DOI: 10.1016/j.ijbiomac.2020.03.251] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 03/12/2020] [Accepted: 03/30/2020] [Indexed: 02/03/2023]
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14
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Blagojević Filipović JP, Hall MB, Zarić SD. Stacking interactions of resonance-assisted hydrogen-bridged rings and C 6-aromatic rings. Phys Chem Chem Phys 2020; 22:13721-13728. [PMID: 32529195 DOI: 10.1039/d0cp01624a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Stacking interactions between six-membered resonance-assisted hydrogen-bridged (RAHB) rings and C6-aromatic rings were systematically studied by analyzing crystal structures in the Cambridge Structural Database (CSD). The interaction energies were calculated by quantum-chemical methods. Although the interactions are stronger than benzene/benzene stacking interactions (-2.7 kcal mol-1), the strongest calculated RAHB/benzene stacking interaction (-3.7 kcal mol-1) is significantly weaker than the strongest calculated RAHB/RAHB stacking interaction (-4.7 kcal mol-1), but for a particular composition of RAHB rings, RAHB/benzene stacking interactions can be weaker or stronger than the corresponding RAHB/RAHB stacking interactions. They are also weaker than the strongest calculated stacking interaction between five-membered saturated hydrogen-bridged rings and benzene (-4.4 kcal mol-1) and between two five-membered saturated hydrogen-bridged rings (-4.9 kcal mol-1). SAPT energy decomposition analyses show that the strongest attractive term in RAHB/benzene stacking interactions is dispersion, however, it is mostly canceled by a repulsive exchange term; hence the geometries of the most stable structures are determined by an electrostatic term.
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Affiliation(s)
| | - Michael B Hall
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA
| | - Snežana D Zarić
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia.
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15
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Cabaleiro-Lago EM, Rodríguez-Otero J, Vázquez SA. The relative position of π-π interacting rings notably changes the nature of the substituent effect. Phys Chem Chem Phys 2020; 22:12068-12081. [PMID: 32441295 DOI: 10.1039/d0cp01253j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The substituent effect in monosubstituted benzene dimers mostly follows changes on electrostatics mainly controlled by the direct interaction of the substituent and the other phenyl ring, whereas the contribution from the interacting rings is smaller. As the substituent is located further away the two contributions become of similar magnitude, so the global result is a combination of both effects. These trends are confirmed in larger systems containing a contact between phenyl rings; at closer distances the interaction of the substituent and the other ring clearly dominates over changes associated with the substituted ring, but as the substituent is located further away its contribution decreases and the contribution from the ring becomes more relevant. Care should be taken in larger systems because the observed energy change can also be affected by interactions with other regions of the molecule not directly involved in the π-π interaction.
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Affiliation(s)
- Enrique M Cabaleiro-Lago
- Departamento de Química Física, Facultade de Ciencias, Universidade de Santiago de Compostela, Campus de Lugo, Av. Alfonso X El Sabio, s/n 27002 Lugo, Galicia, Spain.
| | - Jesús Rodríguez-Otero
- Departamento de Química Física, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain.
| | - Saulo A Vázquez
- Departamento de Química Física, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain.
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16
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Morales-Collazo O, Lynch VM, Brennecke JF. 6,7-Di-hydro-5 H-pyrrolo-[1,2- a]imidazole. IUCRDATA 2020; 5:x200681. [PMID: 36337149 PMCID: PMC9462221 DOI: 10.1107/s2414314620006811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 05/20/2020] [Indexed: 11/10/2022] Open
Abstract
The crystal structure of 6,7-di-hydro-5H-pyrrolo-[1,2-a]imidazole, C6H8N2, at 100 K has monoclinic (P21/n) symmetry. The mol-ecule adopts an envelope conformation of the pyrrolidine ring, which might help for the relief torsion tension. The crystal cohesion is achieved by C-H⋯N hydrogen bonds. Inter-estingly, this fused ring system provides protection of the α-C atom (attached to the non-bridging N atom of the imidazole ring), which provides stability that is of inter-est with respect to electrochemical properties as electrolytes for fuel cells and batteries, and electrodeposition.
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Affiliation(s)
- Oscar Morales-Collazo
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, USA
| | - Vincent M. Lynch
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, USA
| | - Joan F. Brennecke
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, USA
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17
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Ninković D, Blagojević Filipović JP, Hall MB, Brothers EN, Zarić SD. What Is Special about Aromatic-Aromatic Interactions? Significant Attraction at Large Horizontal Displacement. ACS CENTRAL SCIENCE 2020; 6:420-425. [PMID: 32232142 PMCID: PMC7099588 DOI: 10.1021/acscentsci.0c00005] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Indexed: 05/22/2023]
Abstract
High-level ab initio calculations show that the most stable stacking for benzene-cyclohexane is 17% stronger than that for benzene-benzene. However, as these systems are displaced horizontally the benzene-benzene attraction retains its strength. At a displacement of 5.0 Å, the benzene-benzene attraction is still ∼70% of its maximum strength, while benzene-cyclohexane attraction has fallen to ∼40% of its maximum strength. Alternatively, the radius of attraction (>2.0 kcal/mol) for benzene-benzene is 250% larger than that for benzene-cyclohexane. Thus, at relatively large distances aromatic rings can recognize each other, a phenomenon that helps explain their importance in protein folding and supramolecular structures.
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Affiliation(s)
- Dragan
B. Ninković
- Innovation
Center of the Faculty of Chemistry in Belgrade, Studentski trg 12-16, Belgrade 11001, Serbia
| | | | - Michael B. Hall
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
- E-mail:
| | - Edward N. Brothers
- Department
of Chemistry, Texas A&M University at
Qatar, P.O. Box 23874, Doha, Qatar
| | - Snežana D. Zarić
- Faculty
of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade 11000, Serbia
- Department
of Chemistry, Texas A&M University at
Qatar, P.O. Box 23874, Doha, Qatar
- E-mail:
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18
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Stanković IM, Niu S, Hall MB, Zarić SD. Role of aromatic amino acids in amyloid self-assembly. Int J Biol Macromol 2020; 156:949-959. [PMID: 32199918 DOI: 10.1016/j.ijbiomac.2020.03.064] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 03/09/2020] [Accepted: 03/09/2020] [Indexed: 10/24/2022]
Abstract
Amyloids are proteins of a cross-β structure found as deposits in several diseases and also in normal tissues (nails, spider net, silk). Aromatic amino acids are frequently found in amyloid deposits. Although they are not indispensable, aromatic amino acids, phenylalanine, tyrosine and tryptophan, enhance significantly the kinetics of formation and thermodynamic stability, while tape or ribbon-like morphology is represented in systems with experimentally detected π-π interactions between aromatic rings. Analysis of geometries and energies of the amyloid PDB structures indicate the prevalence of aromatic-nonaromatic interactions and confirm that aromatic-aromatic interactions are not crucial for the amyloid formation.
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Affiliation(s)
| | - Shuqiang Niu
- Department of Chemistry, Texas A&M University, College Station, TX 77843, United States of America
| | - Michael B Hall
- Department of Chemistry, Texas A&M University, College Station, TX 77843, United States of America
| | - Snežana D Zarić
- Faculty of Chemistry, University of Belgrade, Studentski Trg, 12-16, Belgrade, Serbia; Department of Chemistry, Texas A&M University at Qatar, P. O. Box 23874, Doha, Qatar.
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19
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Madni M, Ahmed MN, Hafeez M, Ashfaq M, Tahir MN, Gil DM, Galmés B, Hameed S, Frontera A. Recurrent π–π stacking motifs in three new 4,5-dihydropyrazolyl–thiazole–coumarin hybrids: X-ray characterization, Hirshfeld surface analysis and DFT calculations. NEW J CHEM 2020. [DOI: 10.1039/d0nj02931a] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Two different π–π stacking modes are described, studied and characterized in the crystal structures of 4,5-dihydropyrazolyl–thiazole–coumarin hybrids, including a partial aliphatic ring.
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Affiliation(s)
- Murtaza Madni
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad 45320
- Pakistan
| | - Muhammad Naeem Ahmed
- Department of Chemistry
- The University of Azad Jammu and Kashmir
- Muzaffarabad
- Pakistan
| | - Muhammad Hafeez
- Department of Chemistry
- The University of Azad Jammu and Kashmir
- Muzaffarabad
- Pakistan
| | | | | | - Diego M. Gil
- INBIOFAL (CONICET – UNT)
- Instituto de Química Orgánica – Cátedra de Química Orgánica I
- Facultad de Bioquímica
- Química y Farmacia
- Universidad Nacional de Tucumán
| | - Bartomeu Galmés
- Department de Quimica
- Universitat de les Illes Balears
- 07122 Palma de Mallorca
- Spain
| | - Shahid Hameed
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad 45320
- Pakistan
| | - Antonio Frontera
- Department de Quimica
- Universitat de les Illes Balears
- 07122 Palma de Mallorca
- Spain
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20
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Huang Z, Ma C, Wu M, Li X, Lu C, Zhang X, Ma X, Yang Y, Huang Y, Pan X, Wu C. Exploring the drug-lipid interaction of weak-hydrophobic drug loaded solid lipid nanoparticles by isothermal titration calorimetry. JOURNAL OF NANOPARTICLE RESEARCH 2020; 22:3. [DOI: 10.1007/s11051-019-4671-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 09/25/2019] [Indexed: 06/25/2024]
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21
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Malenov DP, Aladić AJ, Zarić SD. Stacking interactions of borazine: important stacking at large horizontal displacements and dihydrogen bonding governed by electrostatic potentials of borazine. Phys Chem Chem Phys 2019; 21:24554-24564. [PMID: 31663532 DOI: 10.1039/c9cp02966d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Potential energy surfaces of borazine-benzene and borazine-borazine stacking interactions were studied by performing DFT, CCSD(T)/CBS and SAPT calculations. The strongest borazine-benzene stacking was found in a parallel-displaced geometry, with a CCSD(T)/CBS interaction energy of -3.46 kcal mol-1. The strongest borazine-borazine stacking has a sandwich geometry, with a CCSD(T)/CBS interaction energy of -3.57 kcal mol-1. The study showed that borazine forms significant stacking interactions at large horizontal displacements (over 4.5 Å), with energies of -2.20 kcal mol-1 for the borazine-benzene and -1.96 kcal mol-1 for the borazine-borazine system. The strength of interactions and their geometrical preferences can be rationalized by observing the electrostatic potentials of borazine and benzene, which is in agreement with SAPT analysis showing that electrostatics is the most important energy component for borazine stacking. All the interactions found in crystal structures of borazine and related compounds were identified either as potential curve minima or the geometries obtained from their optimizations. We also report a new dihydrogen bonding dimer with a CCSD(T)/CBS interaction energy of -2.37 kcal mol-1, which is encountered in the borazine crystal structures and enables the formation of additional simultaneous interactions that contribute to the overall stability of the crystals.
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Affiliation(s)
- Dušan P Malenov
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia.
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22
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Đorović J, Milenković D, Joksović L, Joksović M, Marković Z. Study of Influence of Free Radical Species on Antioxidant Activity of Selected 1,2,4‐Triazole‐3‐thiones. ChemistrySelect 2019. [DOI: 10.1002/slct.201900895] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jelena Đorović
- Bioengineering Research and Development CenterPrvoslava Stojanovića 6 Kragujevac Republic of Serbia
| | - Dejan Milenković
- Bioengineering Research and Development CenterPrvoslava Stojanovića 6 Kragujevac Republic of Serbia
| | - Ljubinka Joksović
- University of KragujevacFaculty of ScienceDepartment of Chemistry Radoja Domanovića 12 34000 Kragujevac Republic of Serbia
| | - Milan Joksović
- University of KragujevacFaculty of ScienceDepartment of Chemistry Radoja Domanovića 12 34000 Kragujevac Republic of Serbia
| | - Zoran Marković
- Bioengineering Research and Development CenterPrvoslava Stojanovića 6 Kragujevac Republic of Serbia
- Department of Chemical-Technological SciencesState University of Novi Pazar, Vuka Karadžića bb 36300 Novi Pazar Republic of Serbia
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23
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Synthesis and Characterization of 3-(1-((3,4-Dihydroxyphenethyl)amino)ethylidene)-chroman-2,4-dione as a Potential Antitumor Agent. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:2069250. [PMID: 30906500 PMCID: PMC6393868 DOI: 10.1155/2019/2069250] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 12/05/2018] [Indexed: 11/17/2022]
Abstract
The newly synthesized coumarin derivative with dopamine, 3-(1-((3,4-dihydroxyphenethyl)amino)ethylidene)-chroman-2,4-dione, was completely structurally characterized by X-ray crystallography. It was shown that several types of hydrogen bonds are present, which additionally stabilize the structure. The compound was tested in vitro against different cell lines, healthy human keratinocyte HaCaT, cervical squamous cell carcinoma SiHa, breast carcinoma MCF7, and hepatocellular carcinoma HepG2. Compared to control, the new derivate showed a stronger effect on both healthy and carcinoma cell lines, with the most prominent effect on the breast carcinoma MCF7 cell line. The molecular docking study, obtained for ten different conformations of the new compound, showed its inhibitory nature against CDKS protein. Lower inhibition constant, relative to one of 4-OH-coumarine, proved stronger and more numerous interactions with CDKS protein. These interactions were carefully examined for both parent molecule and derivative and explained from a structural point of view.
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24
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Antonijević IS, Malenov DP, Hall MB, Zarić SD. Study of stacking interactions between two neutral tetrathiafulvalene molecules in Cambridge Structural Database crystal structures and by quantum chemical calculations. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS 2019; 75:1-7. [DOI: 10.1107/s2052520618015494] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 11/02/2018] [Indexed: 11/10/2022]
Abstract
Tetrathiafulvalene (TTF) and its derivatives are very well known as electron donors with widespread use in the field of organic conductors and superconductors. Stacking interactions between two neutral TTF fragments were studied by analysing data from Cambridge Structural Database crystal structures and by quantum chemical calculations. Analysis of the contacts found in crystal structures shows high occurrence of parallel displaced orientations of TTF molecules. In the majority of the contacts, two TTF molecules are displaced along their longer C
2 axis. The most frequent geometry has the strongest TTF–TTF stacking interaction, with CCSD(T)/CBS energy of −9.96 kcal mol−1. All the other frequent geometries in crystal structures are similar to geometries of the minima on the calculated potential energy surface.
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25
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Avdović EH, Dimić DS, Dimitrić Marković JM, Vuković N, Radulović MĐ, Živanović MN, Filipović ND, Đorović JR, Trifunović SR, Marković ZS. Spectroscopic and theoretical investigation of the potential anti-tumor and anti-microbial agent, 3-(1-((2-hydroxyphenyl)amino)ethylidene)chroman-2,4-dione. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 206:421-429. [PMID: 30172238 DOI: 10.1016/j.saa.2018.08.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/12/2018] [Accepted: 08/19/2018] [Indexed: 06/08/2023]
Abstract
The coumarin-orthoaminophenol derivative was prepared under mild conditions. Based on crystallographic structure, IR and Raman, 1H and 13C NMR spectra the most applicable theoretical method was determined to be B3LYP-D3BJ. The stability and reactivity parameters were calculated, in the framework of NBO, QTAIM and Fukui functions, form the optimized structure. This reactivity was then probed in biological systems. The antimicrobial activity towards four bacteria and three fungi species was examined and activity was proven. In vitro cytotoxic effects, against human epithelial colorectal carcinoma HCT-116 and human healthy lung MRC-5 cell lines, of the investigated substance are also tested. Compound showed significant cytotoxic effects on HCT-116 cells, while on MRC-5 cells showed no cytotoxic effects. The effect of hydroxy group in ortho-position on the overall reactivity of molecule was examined through molecular docking with Glutathione-S-transferases.
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Affiliation(s)
- Edina H Avdović
- University of Kragujevac, Faculty of Science, Radoja Domanovića 12, 34000 Kragujevac, Serbia
| | - Dušan S Dimić
- University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia
| | | | - Nenad Vuković
- University of Kragujevac, Faculty of Science, Radoja Domanovića 12, 34000 Kragujevac, Serbia
| | - Milanka Đ Radulović
- Department of Chemical-Technological Sciences, State University of Novi Pazar, Vuka Karadžića bb, 36300 Novi Pazar, Serbia
| | - Marko N Živanović
- University of Kragujevac, Faculty of Science, Radoja Domanovića 12, 34000 Kragujevac, Serbia; BioIRC, Bioengineering R&D Center, Prvoslava Stojanovića 6, 34000 Kragujevac, Serbia
| | - Nenad D Filipović
- BioIRC, Bioengineering R&D Center, Prvoslava Stojanovića 6, 34000 Kragujevac, Serbia; University of Kragujevac, Faculty of Engineering, Sestre Janjic 6, 34000 Kragujevac, Serbia
| | - Jelena R Đorović
- BioIRC, Bioengineering R&D Center, Prvoslava Stojanovića 6, 34000 Kragujevac, Serbia
| | - Srećko R Trifunović
- University of Kragujevac, Faculty of Science, Radoja Domanovića 12, 34000 Kragujevac, Serbia
| | - Zoran S Marković
- BioIRC, Bioengineering R&D Center, Prvoslava Stojanovića 6, 34000 Kragujevac, Serbia; Department of Chemical-Technological Sciences, State University of Novi Pazar, Vuka Karadžića bb, 36300 Novi Pazar, Serbia.
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26
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Cabaleiro-Lago EM, Rodríguez-Otero J. On the Nature of σ-σ, σ-π, and π-π Stacking in Extended Systems. ACS OMEGA 2018; 3:9348-9359. [PMID: 31459068 PMCID: PMC6645327 DOI: 10.1021/acsomega.8b01339] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 07/27/2018] [Indexed: 05/30/2023]
Abstract
Stacking interactions have been evaluated, employing computational methods, in dimers formed by analogous aliphatic and aromatic species of increasing size. Changes in stability as the systems become larger are mostly controlled by the balance of increasing repulsion and dispersion contributions, while electrostatics plays a secondary but relevant role. The interaction energy increases as the size of the system grows, but it does much faster in π-π dimers than in σ-π complexes and more remarkably than in σ-σ dimers. The main factor behind the larger stability of aromatic dimers compared to complexes containing aliphatic molecules is related to changes in the properties of the aromatic systems due to electron delocalization leading to larger dispersion contributions. Besides, an extra stabilization in π-π complexes is due to the softening of the repulsive wall in aromatic species that allows the molecules to come closer.
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Affiliation(s)
- Enrique M. Cabaleiro-Lago
- Facultade
de Ciencias (Dpto. de Química Física), Universidade de Santiago de Compostela, Campus de Lugo. Avda. Alfonso X El Sabio s/n, 27002 Lugo, Galicia, Spain
| | - Jesús Rodríguez-Otero
- CIQUS
and Facultade de Química (Dpto. de Química Física), Universidade de Santiago de Compostela, 15782 Santiago
de Compostela, Galicia, Spain
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27
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Gryn’ova G, Corminboeuf C. Steric "attraction": not by dispersion alone. Beilstein J Org Chem 2018; 14:1482-1490. [PMID: 30013675 PMCID: PMC6037011 DOI: 10.3762/bjoc.14.125] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 06/02/2018] [Indexed: 12/23/2022] Open
Abstract
Non-covalent interactions between neutral, sterically hindered organic molecules generally involve a strong stabilizing contribution from dispersion forces that in many systems turns the 'steric repulsion' into a 'steric attraction'. In addition to London dispersion, such systems benefit from electrostatic stabilization, which arises from a short-range effect of charge penetration and gets bigger with increasing steric bulk. In the present work, we quantify this contribution for a diverse set of molecular cores, ranging from unsubstituted benzene and cyclohexane to their derivatives carrying tert-butyl, phenyl, cyclohexyl and adamantyl substituents. While the importance of electrostatic interactions in the dimers of sp2-rich (e.g., π-conjugated) cores is well appreciated, less polarizable assemblies of sp3-rich systems with multiple short-range CH···HC contacts between the bulky cyclohexyl and adamantyl moieties are also significantly influenced by electrostatics. Charge penetration is drastically larger in absolute terms for the sp2-rich cores, but still has a non-negligible effect on the sp3-rich dimers, investigated herein, both in terms of their energetics and equilibrium interaction distances. These results emphasize the importance of this electrostatic effect, which has so far been less recognized in aliphatic systems compared to London dispersion, and are therefore likely to have implications for the development of force fields and methods for crystal structure prediction.
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Affiliation(s)
- Ganna Gryn’ova
- Institut des Sciences et Ingénierie Chimiques, École polytechnique fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Clémence Corminboeuf
- Institut des Sciences et Ingénierie Chimiques, École polytechnique fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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28
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Jeremić S, Amić A, Stanojević-Pirković M, Marković Z. Selected anthraquinones as potential free radical scavengers and P-glycoprotein inhibitors. Org Biomol Chem 2018; 16:1890-1902. [DOI: 10.1039/c8ob00060c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this article, we estimated the scavenger capacity of six selected anthraquinones toward free radicals and their efficacy as inhibitors of P-glycoproteins.
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Affiliation(s)
- S. Jeremić
- Department of Chemical-Technological Sciences
- State University of Novi Pazar
- 36300 Novi Pazar
- Serbia
| | - A. Amić
- Department of Chemistry
- Josip Juraj Strossmayer University of Osijek
- 31000 Osijek
- Croatia
| | | | - Z. Marković
- Department of Chemical-Technological Sciences
- State University of Novi Pazar
- 36300 Novi Pazar
- Serbia
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29
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Ramanathan N, Sankaran K, Sundararajan K. Nitrogen: A New Class of π-Bonding Partner in Hetero π-Stacking Interaction. J Phys Chem A 2017; 121:9081-9091. [DOI: 10.1021/acs.jpca.7b08164] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- N. Ramanathan
- Materials Chemistry & Metal Fuel Cycle Group, ‡Homi Bhabha National Institute, Indira Gandhi Center for Atomic Research, Kalpakkam 603102, Tamil Nadu, India
| | - K. Sankaran
- Materials Chemistry & Metal Fuel Cycle Group, ‡Homi Bhabha National Institute, Indira Gandhi Center for Atomic Research, Kalpakkam 603102, Tamil Nadu, India
| | - K. Sundararajan
- Materials Chemistry & Metal Fuel Cycle Group, ‡Homi Bhabha National Institute, Indira Gandhi Center for Atomic Research, Kalpakkam 603102, Tamil Nadu, India
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30
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Sierański T. Discovering the stacking landscape of a pyridine-pyridine system. J Mol Model 2017; 23:338. [PMID: 29124340 PMCID: PMC5680376 DOI: 10.1007/s00894-017-3496-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 10/09/2017] [Indexed: 10/24/2022]
Abstract
Extremely extensive calculations of potential energy surfaces for the parallel-displaced configuration of pyridine dimer systems have been carried out using a dispersion-corrected density functional. Instead of focusing on stationary geometries these calculations provide much deeper insight into the "landscape" of the interaction energies of the particular systems-one can learn how the pyridine dimer stability changes along with various geometrical parameters. Other calculations such as natural bond orbital and energy decomposition have also been applied. The interplay of two significant factors, electrostatic forces and electron correlation effects, have been evaluated. The role of π···π interactions in the stacked pyridine systems has also been confirmed, and surprisingly, this happened to be true even for the geometries where the formation of C-H···π interactions might be proposed instead. The combination of many different methods has revealed the complexity of the stacking interactions. Apart from providing a "literal new look" into pyridine interaction patterns another picture has emerged. A stacking interaction in a pyridine dimer system is perceived as a combination of many different sources of the interaction energy, including orbital ones, and this is true for many different geometries.
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Affiliation(s)
- Tomasz Sierański
- Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland.
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31
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Burakowski A, Gliński J. Dimerization Constants from Acoustic Measurements: Solutions of Benzene, Cyclohexylamine and Aniline in Cyclohexane. J SOLUTION CHEM 2017; 46:1501-1513. [PMID: 28798501 PMCID: PMC5527082 DOI: 10.1007/s10953-017-0656-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 05/15/2017] [Indexed: 11/24/2022]
Abstract
A model assuming that the formation of dimers determines the acoustic properties of liquid mixtures, in the inert solvent cyclohexane, was applied to describe the observed dependences of sound speed on composition. The dimerization constants were estimated. The results allow one to propose that the solutes tend to form associates larger than dimers in concentrated solutions, while in dilute systems solute–solvent interactions play an important role.
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Affiliation(s)
- Andrzej Burakowski
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Jacek Gliński
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
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32
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Ninković DB, Malenov DP, Petrović PV, Brothers EN, Niu S, Hall MB, Belić MR, Zarić SD. Unexpected Importance of Aromatic-Aliphatic and Aliphatic Side Chain-Backbone Interactions in the Stability of Amyloids. Chemistry 2017; 23:11046-11053. [DOI: 10.1002/chem.201701351] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Dragan B. Ninković
- Science Program; Texas A&M University at Qatar; Texas A&M Engineering Building, Education City Doha Qatar
- Innovation Center; Department of Chemistry; University of Belgrade; Studentski trg 12-16 11000 Belgrade Serbia
| | - Dušan P. Malenov
- Department of Chemistry; University of Belgrade; Studentski trg 12-16 11000 Belgrade Serbia
| | - Predrag V. Petrović
- Science Program; Texas A&M University at Qatar; Texas A&M Engineering Building, Education City Doha Qatar
- Innovation Center; Department of Chemistry; University of Belgrade; Studentski trg 12-16 11000 Belgrade Serbia
| | - Edward N. Brothers
- Science Program; Texas A&M University at Qatar; Texas A&M Engineering Building, Education City Doha Qatar
| | - Shuqiang Niu
- Department of Chemistry; Texas A&M University; College Station TX 77843-3255 USA
| | - Michael B. Hall
- Department of Chemistry; Texas A&M University; College Station TX 77843-3255 USA
| | - Milivoj R. Belić
- Science Program; Texas A&M University at Qatar; Texas A&M Engineering Building, Education City Doha Qatar
| | - Snežana D. Zarić
- Science Program; Texas A&M University at Qatar; Texas A&M Engineering Building, Education City Doha Qatar
- Department of Chemistry; University of Belgrade; Studentski trg 12-16 11000 Belgrade Serbia
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33
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Cabaleiro-Lago EM, Rodríguez-Otero J. σ-σ, σ-π, and π-π Stacking Interactions between Six-Membered Cyclic Systems. Dispersion Dominates and Electrostatics Commands. ChemistrySelect 2017. [DOI: 10.1002/slct.201700671] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Enrique M. Cabaleiro-Lago
- Facultade de Ciencias (Dpto. de Química Física); Universidade de Santiago de Compostela; Avda. Alfonso X El Sabio s/n 27002 Lugo, Galicia Spain
| | - Jesús Rodríguez-Otero
- CIQUS and Facultade de Química (Dpto. de Química Física); Universidade de Santiago de Compostela; 15782 Santiago de Compostela, Galicia Spain)
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34
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Hernández B, Pflüger F, Dauchez M, Ghomi M. Privileged hydration sites in aromatic side chains: effect on conformational equilibrium. Phys Chem Chem Phys 2017; 19:28684-28695. [DOI: 10.1039/c7cp04685e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The most energetically favourable hydration sites of aromatic (Phe, Tyr, Trp and His) side chains revealed by DFT-based theoretical calculations.
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Affiliation(s)
- Belén Hernández
- Laboratoire Matrice Extracellulaire et Dynamique Cellulaire (MEDyC)
- UMR 7369
- 51687 Reims Cedex 2
- France
- Sorbonne Paris Cité
| | - Fernando Pflüger
- Sorbonne Paris Cité
- Université Paris 13
- Groupe de Biophysique Moléculaire
- UFR Santé-Médecine-Biologie Humaine
- 93017 Bobigny cedex
| | - Manuel Dauchez
- Laboratoire Matrice Extracellulaire et Dynamique Cellulaire (MEDyC)
- UMR 7369
- 51687 Reims Cedex 2
- France
| | - Mahmoud Ghomi
- Laboratoire Matrice Extracellulaire et Dynamique Cellulaire (MEDyC)
- UMR 7369
- 51687 Reims Cedex 2
- France
- Sorbonne Paris Cité
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