1
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Delova A, Losantos R, Pecourneau J, Bernhard Y, Mourer M, Pasc A, Monari A. Perturbation of Lipid Bilayers by Biomimetic Photoswitches Based on Cyclocurcumin. J Chem Inf Model 2023; 63:299-307. [PMID: 36479861 DOI: 10.1021/acs.jcim.2c01152] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The use of photoswitches which may be activated by suitable electromagnetic radiation is an attractive alternative to conventional photodynamic therapy. Here, we report all-atom molecular dynamics simulation of a biomimetic photoswitch derived from cyclocurcumin and experiencing E/Z photoisomerization. In particular, we show that the two isomers interact persistently with a lipid bilayer modeling a cellular membrane. Furthermore, the interaction with the membrane is strongly dependent on the concentration, and a transition between ordered and disordered arrangements of the photoswitches is observed. We also confirm that the structural parameters of the bilayer are differently affected by the two isomers and hence can be modulated through photoswitching, offering interesting perspectives for future applications.
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Affiliation(s)
| | - Raúl Losantos
- Université Paris Cité and CNRS, ITODYS, F-75006 Paris, France.,Departamento de Química, Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006 Logroño, Spain
| | | | - Yann Bernhard
- Université de Lorraine CNRS, L2CM UMR 7053, F-54000 Nancy, France
| | - Maxime Mourer
- Université de Lorraine CNRS, L2CM UMR 7053, F-54000 Nancy, France
| | - Andreea Pasc
- Université de Lorraine CNRS, L2CM UMR 7053, F-54000 Nancy, France
| | - Antonio Monari
- Université Paris Cité and CNRS, ITODYS, F-75006 Paris, France
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2
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Bignon E, Marazzi M, Grandemange S, Monari A. Autophagy and evasion of the immune system by SARS-CoV-2. Structural features of the non-structural protein 6 from wild type and Omicron viral strains interacting with a model lipid bilayer. Chem Sci 2022; 13:6098-6105. [PMID: 35685814 PMCID: PMC9132136 DOI: 10.1039/d2sc00108j] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 04/29/2022] [Indexed: 12/21/2022] Open
Abstract
The viral cycle of SARS-CoV-2 is based on a complex interplay with the cellular machinery, which is mediated by specific proteins eluding or hijacking the cellular defense mechanisms. Among the complex pathways induced by the viral infection, autophagy is particularly crucial and is strongly influenced by the action of the non-structural protein 6 (Nsp6) interacting with the endoplasmic reticulum membrane. Importantly, differently from other non-structural proteins, Nsp6 is mutated in the recently emerged Omicron variant, suggesting a possible different role of autophagy. In this contribution we explore, for the first time, the structural properties of Nsp6 thanks to long-timescale molecular dynamics simulations and machine learning analysis, identifying the interaction patterns with the lipid membrane. We also show how the mutation brought by the Omicron variant may indeed modify some of the specific interactions, and more particularly help anchor the viral protein to the lipid bilayer interface. The viral cycle of SARS-CoV-2 is based on a complex interplay with the cellular machinery, which is mediated by specific proteins eluding or hijacking the cellular defense mechanisms.![]()
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Affiliation(s)
| | - Marco Marazzi
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering and Chemical Research Institute "Andres M. del Rio" (IQAR), Universidad de Alcalá 28805 Alcalá de Hénares Spain
| | | | - Antonio Monari
- Université Paris Cité and CNRS, ITODYS F-75006 Paris France
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3
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Bejarano F, Gutiérrez D, Catalán-Toledo J, Roca-Sanjuán D, Gierschner J, Veciana J, Mas-Torrent M, Rovira C, Crivillers N. Photoswitching activation of a ferrocenyl-stilbene analogue by its covalent grafting to gold. Phys Chem Chem Phys 2022; 24:6185-6192. [PMID: 35229090 DOI: 10.1039/d1cp05012e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Until now, surface-deposited stilbenes have been much less studied than other photochromic systems. Here, an asymmetrically substituted styrene incorporating a redox-active ferrocene moiety and a terminal alkyne group has been synthesised to investigate its photoisomerization in solution, and upon the formation of chemisorbed self-assembled monolayers through a carbon-gold bond formation. Charge transport measurements across the monolayers reveal that upon chemical linkage to the gold substrate there is an alteration of the isomerization pathway, which favours the trans to cis conversion, which is not observed in solution. The experimental observations are interpreted based on quantum chemistry calculations.
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Affiliation(s)
- Francesc Bejarano
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
| | - Diego Gutiérrez
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain. .,Leitat Technological Center (LEITAT), Carrer Innovació, 2, 08225 Terrassa, Spain
| | - José Catalán-Toledo
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
| | - Daniel Roca-Sanjuán
- Institute of Molecular Science, University of Valencia, P.O. Box 22085, ES-46071 Valencia, Spain
| | - Johannes Gierschner
- Madrid Institute for Advanced Studies, IMDEA Nanoscience, Calle Faraday 9, Campus Cantoblanco, 28049 Madrid, Spain.
| | - Jaume Veciana
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
| | - Marta Mas-Torrent
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
| | - Concepció Rovira
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
| | - Núria Crivillers
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
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4
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Zapata F, Nucci M, Castaño O, Marazzi M, Frutos LM. Thermal and Mechanochemical Tuning of the Porphyrin Singlet-Triplet Gap for Selective Energy Transfer Processes: A Molecular Dynamics Approach. J Chem Theory Comput 2021; 17:5429-5439. [PMID: 34351751 PMCID: PMC8919258 DOI: 10.1021/acs.jctc.1c00291] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecular dynamics simulations provide fundamental knowledge on the reaction mechanism of a given simulated molecular process. Nevertheless, other methodologies based on the "static" exploration of potential energy surfaces are usually employed to firmly provide the reaction coordinate directly related to the reaction mechanism, as is the case in intrinsic reaction coordinates for thermally activated reactions. Photoinduced processes in molecular systems can also be studied with these two strategies, as is the case in the triplet energy transfer process. Triplet energy transfer is a fundamental photophysical process in photochemistry and photobiology, being for instance involved in photodynamic therapy, when generating the highly reactive singlet oxygen species. Here, we study the triplet energy transfer process between porphyrin, a prototypical energy transfer donor, and different biologically relevant acceptors, including molecular oxygen, carotenoids, and rhodopsin. The results obtained by means of nanosecond time-scale molecular dynamics simulations are compared to the "static" determination of the reaction coordinate for such a thermal process, leading to the distortions determining an effective energy transfer. This knowledge was finally applied to propose porphyrin derivatives for producing the required structural modifications in order to tune their singlet-triplet energy gap, thus introducing a mechanochemical description of the mechanism.
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Affiliation(s)
- Felipe Zapata
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33.600, Alcalá de Henares, Madrid E28805, Spain
| | - Martina Nucci
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33.600, Alcalá de Henares, Madrid E28805, Spain
| | - Obis Castaño
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33.600, Alcalá de Henares, Madrid E28805, Spain
| | - Marco Marazzi
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33.600, Alcalá de Henares, Madrid E28805, Spain.,Instituto de Investigación Química "Andrés M. del Rio" (IQAR), Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33.600, Alcalá de Henares, Madrid E-28805, Spain
| | - Luis Manuel Frutos
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33.600, Alcalá de Henares, Madrid E28805, Spain.,Instituto de Investigación Química "Andrés M. del Rio" (IQAR), Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33.600, Alcalá de Henares, Madrid E-28805, Spain
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5
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Pucci C, Martinelli C, Degl'Innocenti A, Desii A, De Pasquale D, Ciofani G. Light-Activated Biomedical Applications of Chlorophyll Derivatives. Macromol Biosci 2021; 21:e2100181. [PMID: 34212510 DOI: 10.1002/mabi.202100181] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/06/2021] [Indexed: 02/01/2023]
Abstract
Tetrapyrroles are the basis of essential physiological functions in most living organisms. These compounds represent the basic scaffold of porphyrins, chlorophylls, and bacteriochlorophylls, among others. Chlorophyll derivatives, obtained by the natural or artificial degradation of chlorophylls, present unique properties, holding great potential in the scientific and medical fields. Indeed, they can act as cancer-preventing agents, antimutagens, apoptosis inducers, efficient antioxidants, as well as antimicrobial and immunomodulatory molecules. Moreover, thanks to their peculiar optical properties, they can be exploited as photosensitizers for photodynamic therapy and as vision enhancers. Most of these molecules, however, are highly hydrophobic and poorly soluble in biological fluids, and may display undesired toxicity due to accumulation in healthy tissues. The advent of nanomedicine has prompted the development of nanoparticles acting as carriers for chlorophyll derivatives, facilitating their targeted administration with demonstrated applicability in diagnosis and therapy. In this review, the chemical and physical properties of chlorophyll derivatives that justify their usage in the biomedical field, with particular regard to light-activated dynamics are described. Their role as antioxidants and photoactive agents are discussed, introducing the most recent nanomedical applications and focusing on inorganic and organic nanocarriers exploited in vitro and in vivo.
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Affiliation(s)
- Carlotta Pucci
- Istituto Italiano di Tecnologia, Smart Bio-Interfaces, Viale Rinaldo Piaggio 34, Pontedera, Pisa, 56025, Italy
| | - Chiara Martinelli
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan, 20133, Italy
| | - Andrea Degl'Innocenti
- Istituto Italiano di Tecnologia, Smart Bio-Interfaces, Viale Rinaldo Piaggio 34, Pontedera, Pisa, 56025, Italy
| | - Andrea Desii
- Istituto Italiano di Tecnologia, Smart Bio-Interfaces, Viale Rinaldo Piaggio 34, Pontedera, Pisa, 56025, Italy
| | - Daniele De Pasquale
- Istituto Italiano di Tecnologia, Smart Bio-Interfaces, Viale Rinaldo Piaggio 34, Pontedera, Pisa, 56025, Italy
| | - Gianni Ciofani
- Istituto Italiano di Tecnologia, Smart Bio-Interfaces, Viale Rinaldo Piaggio 34, Pontedera, Pisa, 56025, Italy
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6
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Pecourneau J, Losantos R, Monari A, Parant S, Pasc A, Mourer M. Synthesis and Photoswitching Properties of Bioinspired Dissymmetric γ-Pyrone, an Analogue of Cyclocurcumin. J Org Chem 2021; 86:8112-8126. [PMID: 34101450 DOI: 10.1021/acs.joc.1c00598] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Cyclocurcumin (CC), a turmeric curcuminoid with potential therapeutic properties, is also a natural photoswitch that may undergo E/Z photoisomerization under UV light. To be further exploited in relevant biological applications, photoactivation under near-infrared (NIR) irradiation is required. Such requirement can be met through opportune chemical modifications, by favoring two-photon absorption (TPA) probability. Herein, a general and efficient synthesis of a biomimetic 2,6-disubstituted-γ-pyrone analogue of CC is described, motivated by the fact that molecular modeling previews an order of magnitude increase of its NIR TPA compared to CC. Three retrosynthetic pathways have been identified (i) via an aryl-oxazole intermediate or via aryl-diynone through (ii) a bottom-up or (iii) a top-down approach. While avoiding the passage through unstable synthons or low-yield intermediate reactions, only the latest approach could conveniently afford the 2,6-disubstituted-γ-pyrone analogue of CC, in ten steps and with an overall yield of 18%. The photophysical properties of our biomimetic analogue have also been characterized showing an improved photoisomerization yield over the parent natural compound. The potentially improved nonlinear optical properties, as well as enhanced stability, may be correlated to the enforcement of the planarity of the pyrone moiety leading to a quadrupolar D-π-A-π-D system.
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Affiliation(s)
- Jérémy Pecourneau
- Université de Lorraine, CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
| | - Raúl Losantos
- Université de Lorraine, CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France.,Université de Lorraine, CNRS, LPCT UMR 7019, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
| | - Antonio Monari
- Université de Lorraine, CNRS, LPCT UMR 7019, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
| | - Stéphane Parant
- Université de Lorraine, CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
| | - Andreea Pasc
- Université de Lorraine, CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
| | - Maxime Mourer
- Université de Lorraine, CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
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7
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Francés-Monerris A, Hognon C, Miclot T, García-Iriepa C, Iriepa I, Terenzi A, Grandemange S, Barone G, Marazzi M, Monari A. Molecular Basis of SARS-CoV-2 Infection and Rational Design of Potential Antiviral Agents: Modeling and Simulation Approaches. J Proteome Res 2020; 19:4291-4315. [PMID: 33119313 PMCID: PMC7640986 DOI: 10.1021/acs.jproteome.0c00779] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Indexed: 01/18/2023]
Abstract
The emergence in late 2019 of the coronavirus SARS-CoV-2 has resulted in the breakthrough of the COVID-19 pandemic that is presently affecting a growing number of countries. The development of the pandemic has also prompted an unprecedented effort of the scientific community to understand the molecular bases of the virus infection and to propose rational drug design strategies able to alleviate the serious COVID-19 morbidity. In this context, a strong synergy between the structural biophysics and molecular modeling and simulation communities has emerged, resolving at the atomistic level the crucial protein apparatus of the virus and revealing the dynamic aspects of key viral processes. In this Review, we focus on how in silico studies have contributed to the understanding of the SARS-CoV-2 infection mechanism and the proposal of novel and original agents to inhibit the viral key functioning. This Review deals with the SARS-CoV-2 spike protein, including the mode of action that this structural protein uses to entry human cells, as well as with nonstructural viral proteins, focusing the attention on the most studied proteases and also proposing alternative mechanisms involving some of its domains, such as the SARS unique domain. We demonstrate that molecular modeling and simulation represent an effective approach to gather information on key biological processes and thus guide rational molecular design strategies.
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Affiliation(s)
- Antonio Francés-Monerris
- Université
de Lorraine and CNRS, LPCT UMR 7019, F-54000 Nancy, France
- Departament
de Química Física, Universitat
de València, 46100 Burjassot, Spain
| | - Cécilia Hognon
- Université
de Lorraine and CNRS, LPCT UMR 7019, F-54000 Nancy, France
| | - Tom Miclot
- Université
de Lorraine and CNRS, LPCT UMR 7019, F-54000 Nancy, France
- Department
of Biological, Chemical and Pharmaceutical Sciences and Technologies, Università degli Studi di Palermo, Viale delle Scienze Ed. 17, 90128 Palermo, Italy
| | - Cristina García-Iriepa
- Department
of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33,600, 28871 Alcalá de Henares, Madrid, Spain
- Chemical
Research Institute “Andrés M. del Río”
(IQAR), Universidad de Alcalá, 28871 Alcalá de
Henares, Madrid, Spain
| | - Isabel Iriepa
- Chemical
Research Institute “Andrés M. del Río”
(IQAR), Universidad de Alcalá, 28871 Alcalá de
Henares, Madrid, Spain
- Department
of Organic and Inorganic Chemistry, Universidad
de Alcalá, Ctra.
Madrid-Barcelona, Km 33,600, 28871 Alcalá de Henares, Madrid, Spain
| | - Alessio Terenzi
- Department
of Biological, Chemical and Pharmaceutical Sciences and Technologies, Università degli Studi di Palermo, Viale delle Scienze Ed. 17, 90128 Palermo, Italy
| | | | - Giampaolo Barone
- Department
of Biological, Chemical and Pharmaceutical Sciences and Technologies, Università degli Studi di Palermo, Viale delle Scienze Ed. 17, 90128 Palermo, Italy
| | - Marco Marazzi
- Department
of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33,600, 28871 Alcalá de Henares, Madrid, Spain
- Chemical
Research Institute “Andrés M. del Río”
(IQAR), Universidad de Alcalá, 28871 Alcalá de
Henares, Madrid, Spain
| | - Antonio Monari
- Université
de Lorraine and CNRS, LPCT UMR 7019, F-54000 Nancy, France
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8
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Turque O, Greer A, Wauchope OR. Synthetic feasibility of oxygen-driven photoisomerizations of alkenes and polyenes. Org Biomol Chem 2020; 18:9181-9190. [PMID: 33155598 DOI: 10.1039/d0ob01993c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
This review describes O2-dependent photoreactions for possible routes to double-bond isomerizations. E,Z-isomerizations triggered by O2 and visible light are a new area of potential synthetic interest. The reaction involves the reversible addition of O2 to form a peroxy intermediate with oxygen evolution and partial regeneration of the compound as its isomer. Targeting of O2-dependent photoisomerizations also relates to a practical use of visible light, for example the improved light penetration depth for visible as opposed to UV photons in batch sensitized reactions. This review is intended to draw a link between visible-light formation of a peroxy intermediate and its dark degradation with O2 release for unsaturated compound isomerization. This review should be of interest both to photochemists and synthetic organic chemists, as it ties together mechanistic and synthetic work, drawing attention to an overlooked subject.
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Affiliation(s)
- Oliver Turque
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210, USA.
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9
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García-Iriepa C, Hognon C, Francés-Monerris A, Iriepa I, Miclot T, Barone G, Monari A, Marazzi M. Thermodynamics of the Interaction between the Spike Protein of Severe Acute Respiratory Syndrome Coronavirus-2 and the Receptor of Human Angiotensin-Converting Enzyme 2. Effects of Possible Ligands. J Phys Chem Lett 2020; 11:9272-9281. [PMID: 33085491 PMCID: PMC7586454 DOI: 10.1021/acs.jpclett.0c02203] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 10/12/2020] [Indexed: 05/08/2023]
Abstract
Since the end of 2019, the coronavirus SARS-CoV-2 has caused more than 1000000 deaths all over the world and still lacks a medical treatment despite the attention of the whole scientific community. Human angiotensin-converting enzyme 2 (ACE2) was recently recognized as the transmembrane protein that serves as the point of entry of SARS-CoV-2 into cells, thus constituting the first biomolecular event leading to COVID-19 disease. Here, by means of a state-of-the-art computational approach, we propose a rational evaluation of the molecular mechanisms behind the formation of the protein complex. Moreover, the free energy of binding between ACE2 and the active receptor binding domain of the SARS-CoV-2 spike protein is evaluated quantitatively, providing for the first time the thermodynamics of virus-receptor recognition. Furthermore, the action of different ACE2 ligands is also examined in particular in their capacity to disrupt SARS-CoV-2 recognition, also providing via a free energy profile the quantification of the ligand-induced decreased affinity. These results improve our knowledge on molecular grounds of the SARS-CoV-2 infection and allow us to suggest rationales that could be useful for the subsequent wise molecular design for the treatment of COVID-19 cases.
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Affiliation(s)
- Cristina García-Iriepa
- Department of Analytical Chemistry,
Physical Chemistry and Chemical Engineering, Universidad
de Alcalá, Ctra. Madrid-Barcelona, Km
33,600, 28871 Alcalá de Henares, Madrid,
Spain
- Chemical Research Institute
“Andrés M. del Río” (IQAR),
Universidad de Alcalá, 28871
Alcalá de Henares, Madrid, Spain
| | - Cécilia Hognon
- Université de
Lorraine and CNRS, LPCT UMR 7019, F-54000 Nancy,
France
| | - Antonio Francés-Monerris
- Université de
Lorraine and CNRS, LPCT UMR 7019, F-54000 Nancy,
France
- Departament de Química
Física, Universitat de
València, 46100 Burjassot,
Spain
| | - Isabel Iriepa
- Chemical Research Institute
“Andrés M. del Río” (IQAR),
Universidad de Alcalá, 28871
Alcalá de Henares, Madrid, Spain
- Department of Organic and Inorganic
Chemistry, Universidad de Alcalá,
Ctra. Madrid-Barcelona, Km 33,600, 28871 Alcalá de Henares,
Madrid, Spain
| | - Tom Miclot
- Université de
Lorraine and CNRS, LPCT UMR 7019, F-54000 Nancy,
France
- Department of Biological, Chemical and
Pharmaceutical Sciences and Technologies,
Università degli Studi di
Palermo, Viale delle Scienze, 90128 Palermo,
Italy
| | - Giampaolo Barone
- Department of Biological, Chemical and
Pharmaceutical Sciences and Technologies,
Università degli Studi di
Palermo, Viale delle Scienze, 90128 Palermo,
Italy
| | - Antonio Monari
- Université de
Lorraine and CNRS, LPCT UMR 7019, F-54000 Nancy,
France
| | - Marco Marazzi
- Department of Analytical Chemistry,
Physical Chemistry and Chemical Engineering, Universidad
de Alcalá, Ctra. Madrid-Barcelona, Km
33,600, 28871 Alcalá de Henares, Madrid,
Spain
- Chemical Research Institute
“Andrés M. del Río” (IQAR),
Universidad de Alcalá, 28871
Alcalá de Henares, Madrid, Spain
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10
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Hernández-Rodríguez EW, Escorcia AM, van der Kamp MW, Montero-Alejo AL, Caballero J. Multi-scale simulation reveals that an amino acid substitution increases photosensitizing reaction inputs in Rhodopsins. J Comput Chem 2020; 41:2278-2295. [PMID: 32757375 DOI: 10.1002/jcc.26392] [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: 02/09/2020] [Revised: 06/27/2020] [Accepted: 07/04/2020] [Indexed: 11/11/2022]
Abstract
Evaluating the availability of molecular oxygen (O2 ) and energy of excited states in the retinal binding site of rhodopsin is a crucial challenging first step to understand photosensitizing reactions in wild-type (WT) and mutant rhodopsins by absorbing visible light. In the present work, energies of the ground and excited states related to 11-cis-retinal and the O2 accessibility to the β-ionone ring are evaluated inside WT and human M207R mutant rhodopsins. Putative O2 pathways within rhodopsins are identified by using molecular dynamics simulations, Voronoi-diagram analysis, and implicit ligand sampling while retinal energetic properties are investigated through density functional theory, and quantum mechanical/molecular mechanical methods. Here, the predictions reveal that an amino acid substitution can lead to enough energy and O2 accessibility in the core hosting retinal of mutant rhodopsins to favor the photosensitized singlet oxygen generation, which can be useful in understanding retinal degeneration mechanisms and in designing blue-lighting-absorbing proteic photosensitizers.
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Affiliation(s)
- Erix W Hernández-Rodríguez
- Laboratorio de Bioinformática y Química Computacional, Escuela de Química y Farmacia, Facultad de Medicina, Universidad Católica del Maule, Talca, Chile
| | - Andrés M Escorcia
- School of Biochemistry, University of Bristol, University Walk, Bristol, UK
| | | | - Ana L Montero-Alejo
- Departamento de Física, Facultad de Ciencias Naturales, Matemática y del Medio Ambiente (FCNMM), Universidad Tecnológica Metropolitana, Santiago, Chile
| | - Julio Caballero
- Departamento de Bioinformática, Centro de Bioinformática, Simulación y Modelado (CBSM), Facultad de Ingeniería, Universidad de Talca, Talca, Chile
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11
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Aslanoglu B, Yakavets I, Zorin V, Lassalle HP, Ingrosso F, Monari A, Catak S. Optical properties of photodynamic therapy drugs in different environments: the paradigmatic case of temoporfin. Phys Chem Chem Phys 2020; 22:16956-16964. [PMID: 32672774 DOI: 10.1039/d0cp02055a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Computational tools have been used to study the photophysical and photochemical features of photosensitizers in photodynamic therapy (PDT) - a minimally invasive, less aggressive alternative for cancer treatment. PDT is mainly based on the activation of molecular oxygen through the action of a photoexcited sensitizer (photosensitizer). Temoporfin, widely known as mTHPC, is a second-generation photosensitizer, which produces the cytotoxic singlet oxygen when irradiated with visible light and hence destroys tumor cells. However, the bioavailability of the mostly hydrophobic photosensitizer, and hence its incorporation into cells, is fundamental to achieve the desired effect on malignant tissues via PDT. In this study, we focus on the optical properties of the temoporfin chromophore in different environments -in vacuo, in solution, encapsulated in drug delivery agents, namely cyclodextrin, and interacting with a lipid bilayer.
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Affiliation(s)
- Busenur Aslanoglu
- Bogazici University, Department of Chemistry, Bebek 34342, Istanbul, Turkey.
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