1
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Radić Z. Connectivity between surface and interior in catalytic subunits of acetylcholinesterases inferred from their X-ray structures. J Neurochem 2024; 168:386-396. [PMID: 36892323 PMCID: PMC10491739 DOI: 10.1111/jnc.15802] [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: 01/23/2023] [Revised: 02/23/2023] [Accepted: 02/28/2023] [Indexed: 03/10/2023]
Abstract
Catalytic activity and function of acetylcholinesterase (AChE; EC 3.1.1.7) have been recognized and studied for over a century and its quaternary and primary structures for about half a century, and its tertiary structure has been known for about 33 years. Clear understanding of relationships between the structure and the function is still pending for this enzyme. Hundreds of crystallographic, static snapshots of AChEs from different sources reveal largely one general backbone conformation with narrow entry into the active center gorge, tightly fit to accept one acetylcholine (ACh) molecule, in contrast to its high catalytic turnover. This short review of available X-ray structures of AChEs from electric ray Torpedo californica, mouse and human, finds some limited, yet consistent deviations in conformations of selected secondary structure elements of AChE relevant for its function. The observed conformational diversity of the acyl pocket loop of AChE, unlike the large Ω-loop, appears consistent with structurally dynamic INS data and solution-based SAXS experiments to explain its dominant role in controlling the size of the active center gorge opening, as well as connectivity between the immediate surroundings of the buried active Ser, and catalytically relevant sites on the AChE surface.
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Affiliation(s)
- Zoran Radić
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, La Jolla, California, USA
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2
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Mesirca P, Chemin J, Barrère C, Torre E, Gallot L, Monteil A, Bidaud I, Diochot S, Lazdunski M, Soong TW, Barrère-Lemaire S, Mangoni ME, Nargeot J. Selective blockade of Ca v1.2 (α1C) versus Ca v1.3 (α1D) L-type calcium channels by the black mamba toxin calciseptine. Nat Commun 2024; 15:54. [PMID: 38167790 PMCID: PMC10762068 DOI: 10.1038/s41467-023-43502-w] [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: 04/21/2023] [Accepted: 11/10/2023] [Indexed: 01/05/2024] Open
Abstract
L-type voltage-gated calcium channels are involved in multiple physiological functions. Currently available antagonists do not discriminate between L-type channel isoforms. Importantly, no selective blocker is available to dissect the role of L-type isoforms Cav1.2 and Cav1.3 that are concomitantly co-expressed in the heart, neuroendocrine and neuronal cells. Here we show that calciseptine, a snake toxin purified from mamba venom, selectively blocks Cav1.2 -mediated L-type calcium currents (ICaL) at concentrations leaving Cav1.3-mediated ICaL unaffected in both native cardiac myocytes and HEK-293T cells expressing recombinant Cav1.2 and Cav1.3 channels. Functionally, calciseptine potently inhibits cardiac contraction without altering the pacemaker activity in sino-atrial node cells, underscoring differential roles of Cav1.2- and Cav1.3 in cardiac contractility and automaticity. In summary, calciseptine is a selective L-type Cav1.2 Ca2+ channel blocker and should be a valuable tool to dissect the role of these L-channel isoforms.
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Affiliation(s)
- Pietro Mesirca
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094, Montpellier, France.
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France.
| | - Jean Chemin
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094, Montpellier, France
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France
| | - Christian Barrère
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094, Montpellier, France
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France
| | - Eleonora Torre
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094, Montpellier, France
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France
| | - Laura Gallot
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094, Montpellier, France
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France
| | - Arnaud Monteil
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094, Montpellier, France
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Isabelle Bidaud
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094, Montpellier, France
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France
| | - Sylvie Diochot
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France
- Université Côte d'Azur, CNRS, IPMC (Institut de Pharmacologie Moléculaire et Cellulaire), FHU InovPain (Fédération Hospitalo-Universitaire "Innovative Solutions in Refractory Chronic Pain"), F-06560, Valbonne, France
| | - Michel Lazdunski
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France
- Université Côte d'Azur, CNRS, IPMC (Institut de Pharmacologie Moléculaire et Cellulaire), FHU InovPain (Fédération Hospitalo-Universitaire "Innovative Solutions in Refractory Chronic Pain"), F-06560, Valbonne, France
| | - Tuck Wah Soong
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Stéphanie Barrère-Lemaire
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094, Montpellier, France
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France
| | - Matteo E Mangoni
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094, Montpellier, France
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France
| | - Joël Nargeot
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094, Montpellier, France.
- Laboratory of Excellence Ion Channels, Science & Therapeutics, F-06560, Valbonne, France.
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3
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Richmond V, Falcone BN, Maier MS, Arroyo Máñez P. Putting the Puzzle Together To Get the Whole Picture: Molecular Basis of the Affinity of Two Steroid Derivatives to Acetylcholinesterase. ACS OMEGA 2023; 8:25610-25622. [PMID: 37483177 PMCID: PMC10357547 DOI: 10.1021/acsomega.3c03749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 06/14/2023] [Indexed: 07/25/2023]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disorder that has no cure because its etiology is still unknown, and its main treatment is the administration of acetylcholinesterase (AChE) inhibitors. The study of the mechanism of action of this family of compounds is critical for the design of new more potent and specific inhibitors. In this work, we study the molecular basis of an uncompetitive inhibitor (compound 1, 2β, 3α-dihydroxy-5α-cholestan-6-one disulfate), which we have proved to be a peripheral anionic site (PAS)-binding AChE inhibitor. The pipeline designed in this work is key to the development of other PAS inhibitors that not only inhibit the esterase action of the enzyme but could also modulate the non-cholinergic functions of AChE linked to the process of amylogenesis. Our studies showed that 1 inhibits the enzyme not simply by blocking the main gate but by an allosteric mechanism. A detailed and careful analysis of the ligand binding position and the protein dynamics, particularly regarding their secondary gates and active site, was necessary to conclude this. The same analysis was executed with an inactive analogue (compound 2, 2β, 3α-dihydroxy-5α-cholestan-6-one). Our first computational results showed no differences in affinity to AChE between both steroids, making further analysis necessary. This work highlights the variables to be considered and develops a refined methodology, for the successful design of new potent dual-action drugs for AD, particularly PAS inhibitors, an attractive strategy to combat AD.
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Affiliation(s)
- Victoria Richmond
- Facultad
de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Universidad de Buenos Aires, Buenos Aires C1428EGA, Argentina
- Unidad
de Microanálisis y Métodos Físicos aplicados
a la Química Orgánica (UMYMFOR), CONICET-Universidad de Buenos Aires, Pabellón 2 de Ciudad Universitaria, Buenos Aires C1428EGA, Argentina
| | - Bruno N. Falcone
- Facultad
de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Universidad de Buenos Aires, Buenos Aires C1428EGA, Argentina
- Unidad
de Microanálisis y Métodos Físicos aplicados
a la Química Orgánica (UMYMFOR), CONICET-Universidad de Buenos Aires, Pabellón 2 de Ciudad Universitaria, Buenos Aires C1428EGA, Argentina
| | - Marta S. Maier
- Facultad
de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Universidad de Buenos Aires, Buenos Aires C1428EGA, Argentina
- Unidad
de Microanálisis y Métodos Físicos aplicados
a la Química Orgánica (UMYMFOR), CONICET-Universidad de Buenos Aires, Pabellón 2 de Ciudad Universitaria, Buenos Aires C1428EGA, Argentina
| | - Pau Arroyo Máñez
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Universitat
Politècnica de València, Universitat de València, Doctor Moliner 50, Burjassot, Valencia 46100, Spain
- Departamento
de Química Orgánica, Universitat
de València, Doctor Moliner 50, Burjassot, Valencia 46100, Spain
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4
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Cai J, Romão E, Wu G, Li J, Li L, Wang Z, Li Y, Yang J, Shen Y, Xu Z, Muyldermans S, Wang H. Nanobodies as binding-chaperones stabilize the recombinant Bombyx mori acetylcholinesterase and protect the enzyme activity in pesticide detection. Enzyme Microb Technol 2022; 155:109992. [DOI: 10.1016/j.enzmictec.2022.109992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 01/02/2022] [Accepted: 01/05/2022] [Indexed: 11/03/2022]
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5
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De Boer D, Nguyen N, Mao J, Moore J, Sorin EJ. A Comprehensive Review of Cholinesterase Modeling and Simulation. Biomolecules 2021; 11:580. [PMID: 33920972 PMCID: PMC8071298 DOI: 10.3390/biom11040580] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/08/2021] [Accepted: 04/11/2021] [Indexed: 01/18/2023] Open
Abstract
The present article reviews published efforts to study acetylcholinesterase and butyrylcholinesterase structure and function using computer-based modeling and simulation techniques. Structures and models of both enzymes from various organisms, including rays, mice, and humans, are discussed to highlight key structural similarities in the active site gorges of the two enzymes, such as flexibility, binding site location, and function, as well as differences, such as gorge volume and binding site residue composition. Catalytic studies are also described, with an emphasis on the mechanism of acetylcholine hydrolysis by each enzyme and novel mutants that increase catalytic efficiency. The inhibitory activities of myriad compounds have been computationally assessed, primarily through Monte Carlo-based docking calculations and molecular dynamics simulations. Pharmaceutical compounds examined herein include FDA-approved therapeutics and their derivatives, as well as several other prescription drug derivatives. Cholinesterase interactions with both narcotics and organophosphate compounds are discussed, with the latter focusing primarily on molecular recognition studies of potential therapeutic value and on improving our understanding of the reactivation of cholinesterases that are bound to toxins. This review also explores the inhibitory properties of several other organic and biological moieties, as well as advancements in virtual screening methodologies with respect to these enzymes.
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Affiliation(s)
- Danna De Boer
- Department of Chemistry & Biochemistry, California State University, Long Beach, CA 90840, USA;
| | - Nguyet Nguyen
- Department of Chemical Engineering, California State University, Long Beach, CA 90840, USA; (N.N.); (J.M.)
| | - Jia Mao
- Department of Chemical Engineering, California State University, Long Beach, CA 90840, USA; (N.N.); (J.M.)
| | - Jessica Moore
- Department of Biomedical Engineering, California State University, Long Beach, CA 90840, USA;
| | - Eric J. Sorin
- Department of Chemistry & Biochemistry, California State University, Long Beach, CA 90840, USA;
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6
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Silman I, Shnyrov VL, Ashani Y, Roth E, Nicolas A, Sussman JL, Weiner L. Torpedo californica acetylcholinesterase is stabilized by binding of a divalent metal ion to a novel and versatile 4D motif. Protein Sci 2021; 30:966-981. [PMID: 33686648 PMCID: PMC8040873 DOI: 10.1002/pro.4061] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 03/05/2021] [Accepted: 03/05/2021] [Indexed: 11/07/2022]
Abstract
Stabilization of Torpedo californica acetylcholinesterase by the divalent cations Ca+2, Mg+2, and Mn+2 was investigated. All three substantially protect the enzyme from thermal inactivation. Electron paramagnetic resonance revealed one high‐affinity binding site for Mn+2 and several much weaker sites. Differential scanning calorimetry showed a single irreversible thermal transition. All three cations raise both the temperature of the transition and the activation energy, with the transition becoming more cooperative. The crystal structures of the Ca+2 and Mg+2 complexes with Torpedo acetylcholinesterase were solved. A principal binding site was identified. In both cases, it consists of four aspartates (a 4D motif), within which the divalent ion is embedded, together with several water molecules. It makes direct contact with two of the aspartates, and indirect contact, via waters, with the other two. The 4D motif has been identified in 31 acetylcholinesterase sequences and 28 butyrylcholinesterase sequences. Zebrafish acetylcholinesterase also contains the 4D motif; it, too, is stabilized by divalent metal ions. The ASSAM server retrieved 200 other proteins that display the 4D motif, in many of which it is occupied by a divalent cation. It is a very versatile motif, since, even though tightly conserved in terms of RMSD values, it can contain from one to as many as three divalent metal ions, together with a variable number of waters. This novel motif, which binds primarily divalent metal ions, is shared by a broad repertoire of proteins. An animated Interactive 3D Complement (I3DC) is available in Proteopedia at http://proteopedia.org/w/Journal:Protein_Science:3. PDB‐ID(s): 7B38, 7B8E and 7B2W;
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Affiliation(s)
- Israel Silman
- Department of NeurobiologyWeizmann Institute of ScienceRehovotIsrael
| | - Valery L. Shnyrov
- Department of Biochemistry and Molecular BiologyUniversidad de SalamancaSalamancaSpain
| | - Yacov Ashani
- Department of Biomolecular SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Esther Roth
- Department of NeurobiologyWeizmann Institute of ScienceRehovotIsrael
| | - Anne Nicolas
- Department of NeurobiologyWeizmann Institute of ScienceRehovotIsrael
- Department of Chemical and Structural BiologyWeizmann Institute of ScienceRehovotIsrael
| | - Joel L. Sussman
- Department of Chemical and Structural BiologyWeizmann Institute of ScienceRehovotIsrael
- Structural Proteomics UnitWeizmann Institute of ScienceRehovotIsrael
| | - Lev Weiner
- Department of NeurobiologyWeizmann Institute of ScienceRehovotIsrael
- Department of Chemical Research SupportWeizmann Institute of ScienceRehovotIsrael
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7
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Lushchekina SV, Inidjel G, Martinez N, Masson P, Trovaslet-Leroy M, Nachon F, Koza MM, Seydel T, Peters J. Impact of Sucrose as Osmolyte on Molecular Dynamics of Mouse Acetylcholinesterase. Biomolecules 2020; 10:biom10121664. [PMID: 33322722 PMCID: PMC7763276 DOI: 10.3390/biom10121664] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/01/2020] [Accepted: 12/11/2020] [Indexed: 01/28/2023] Open
Abstract
The enzyme model, mouse acetylcholinesterase, which exhibits its active site at the bottom of a narrow gorge, was investigated in the presence of different concentrations of sucrose to shed light on the protein and water dynamics in cholinesterases. The study was conducted by incoherent neutron scattering, giving access to molecular dynamics within the time scale of sub-nano to nanoseconds, in comparison with molecular dynamics simulations. With increasing sucrose concentration, we found non-linear effects, e.g., first a decrease in the dynamics at 5 wt% followed by a gain at 10 wt% sucrose. Direct comparisons with simulations permitted us to understand the following findings: at 5 wt%, sugar molecules interact with the protein surface through water molecules and damp the motions to reduce the overall protein mobility, although the motions inside the gorge are enhanced due to water depletion. When going to 10 wt% of sucrose, some water molecules at the protein surface are replaced by sugar molecules. By penetrating the protein surface, they disrupt some of the intra-protein contacts, and induce new ones, creating new pathways for correlated motions, and therefore, increasing the dynamics. This exhaustive study allowed for an explanation of the detail interactions leading to the observed non-linear behavior.
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Affiliation(s)
- Sofya V. Lushchekina
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia;
| | - Gaetan Inidjel
- Institut Laue Langevin, 38000 Grenoble, France; (G.I.); (N.M.); (M.M.K.); (T.S.)
- Université Grenoble Alpes, UFR PhITEM, LiPhy, CNRS, 38000 Grenoble, France
| | - Nicolas Martinez
- Institut Laue Langevin, 38000 Grenoble, France; (G.I.); (N.M.); (M.M.K.); (T.S.)
- Université Grenoble Alpes, UFR PhITEM, LiPhy, CNRS, 38000 Grenoble, France
| | - Patrick Masson
- Neuropharmacology Laboratory, Kazan Federal University, Kremlevskaya str 18, 480002 Kazan, Russia;
| | - Marie Trovaslet-Leroy
- Institut de Recherche Biomédicale des Armées, 91223 Brétigny sur Orge, France; (M.T.-L.); (F.N.)
| | - Florian Nachon
- Institut de Recherche Biomédicale des Armées, 91223 Brétigny sur Orge, France; (M.T.-L.); (F.N.)
| | - Michael Marek Koza
- Institut Laue Langevin, 38000 Grenoble, France; (G.I.); (N.M.); (M.M.K.); (T.S.)
| | - Tilo Seydel
- Institut Laue Langevin, 38000 Grenoble, France; (G.I.); (N.M.); (M.M.K.); (T.S.)
| | - Judith Peters
- Institut Laue Langevin, 38000 Grenoble, France; (G.I.); (N.M.); (M.M.K.); (T.S.)
- Université Grenoble Alpes, UFR PhITEM, LiPhy, CNRS, 38000 Grenoble, France
- Correspondence: ; Tel.: +33-4-7620-7560
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8
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Comoletti D, Trobiani L, Chatonnet A, Bourne Y, Marchot P. Comparative mapping of selected structural determinants on the extracellular domains of cholinesterase-like cell-adhesion molecules. Neuropharmacology 2020; 184:108381. [PMID: 33166544 DOI: 10.1016/j.neuropharm.2020.108381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/10/2020] [Accepted: 10/29/2020] [Indexed: 11/18/2022]
Abstract
Cell adhesion generally involves formation of homophilic or heterophilic protein complexes between two cells to form transcellular junctions. Neural cell-adhesion members of the α/β-hydrolase fold superfamily of proteins use their extracellular or soluble cholinesterase-like domain to bind cognate partners across cell membranes, as illustrated by the neuroligins. These cell-adhesion molecules currently comprise the synaptic organizers neuroligins found in all animal phyla, along with three proteins found only in invertebrates: the guidance molecule neurotactin, the glia-specific gliotactin, and the basement membrane protein glutactin. Although these proteins share a cholinesterase-like fold, they lack one or more residues composing the catalytic triad responsible for the enzymatic activity of the cholinesterases. Conversely, they are found in various subcellular localisations and display specific disulfide bonding and N-glycosylation patterns, along with individual surface determinants possibly associated with recognition and binding of protein partners. Formation of non-covalent dimers typical of the cholinesterases is documented for mammalian neuroligins, yet whether invertebrate neuroligins and their neurotactin, gliotactin and glutactin relatives also form dimers in physiological conditions is unknown. Here we provide a brief overview of the localization, function, evolution, and conserved versus individual structural determinants of these cholinesterase-like cell-adhesion proteins. This article is part of the special issue entitled 'Acetylcholinesterase Inhibitors: From Bench to Bedside to Battlefield'.
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Affiliation(s)
- Davide Comoletti
- School of Biological Sciences, Victoria University of Wellington, Wellington, 6012, New Zealand; Child Health Institute of New Jersey, New Brunswick, NJ 08901, USA; Department of Neuroscience and Cell Biology Robert Wood Johnson Medical School, Rutgers University, New Brunswick, NJ 08901, USA.
| | - Laura Trobiani
- School of Biological Sciences, Victoria University of Wellington, Wellington, 6012, New Zealand
| | - Arnaud Chatonnet
- Lab 'Dynamique Musculaire et Métabolisme', Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE) / Université Montpellier, Montpellier, France
| | - Yves Bourne
- Lab 'Architecture et Fonction des Macromolécules Biologiques (AFMB)', Centre National de la Recherche Scientifique (CNRS)/Aix-Marseille Univ, Faculté des Sciences - Campus Luminy, Marseille, France
| | - Pascale Marchot
- Lab 'Architecture et Fonction des Macromolécules Biologiques (AFMB)', Centre National de la Recherche Scientifique (CNRS)/Aix-Marseille Univ, Faculté des Sciences - Campus Luminy, Marseille, France.
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9
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Computational studies on cholinesterases: Strengthening our understanding of the integration of structure, dynamics and function. Neuropharmacology 2020; 179:108265. [DOI: 10.1016/j.neuropharm.2020.108265] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/21/2020] [Accepted: 07/27/2020] [Indexed: 12/17/2022]
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10
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Pham VD, To TA, Gagné-Thivierge C, Couture M, Lagüe P, Yao D, Picard MÈ, Lortie LA, Attéré SA, Zhu X, Levesque RC, Charette SJ, Shi R. Structural insights into the putative bacterial acetylcholinesterase ChoE and its substrate inhibition mechanism. J Biol Chem 2020; 295:8708-8724. [PMID: 32371400 PMCID: PMC7324521 DOI: 10.1074/jbc.ra119.011809] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 05/04/2020] [Indexed: 01/01/2023] Open
Abstract
Mammalian acetylcholinesterase (AChE) is well-studied, being important in both cholinergic brain synapses and the peripheral nervous systems and also a key drug target for many diseases. In contrast, little is known about the structures and molecular mechanism of prokaryotic acetylcholinesterases. We report here the structural and biochemical characterization of ChoE, a putative bacterial acetylcholinesterase from Pseudomonas aeruginosa Analysis of WT and mutant strains indicated that ChoE is indispensable for P. aeruginosa growth with acetylcholine as the sole carbon and nitrogen source. The crystal structure of ChoE at 1.35 Å resolution revealed that this enzyme adopts a typical fold of the SGNH hydrolase family. Although ChoE and eukaryotic AChEs catalyze the same reaction, their overall structures bear no similarities constituting an interesting example of convergent evolution. Among Ser-38, Asp-285, and His-288 of the catalytic triad residues, only Asp-285 was not essential for ChoE activity. Combined with kinetic analyses of WT and mutant proteins, multiple crystal structures of ChoE complexed with substrates, products, or reaction intermediate revealed the structural determinants for substrate recognition, snapshots of the various catalytic steps, and the molecular basis of substrate inhibition at high substrate concentrations. Our results indicate that substrate inhibition in ChoE is due to acetate release being blocked by the binding of a substrate molecule in a nonproductive mode. Because of the distinct overall folds and significant differences of the active site between ChoE and eukaryotic AChEs, these structures will serve as a prototype for other prokaryotic acetylcholinesterases.
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Affiliation(s)
- Van Dung Pham
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Tuan Anh To
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Cynthia Gagné-Thivierge
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Hôpital Laval, Québec, Canada
| | - Manon Couture
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Patrick Lagüe
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Deqiang Yao
- iHuman Institute, ShanghaiTech University, Shanghai, P.R. China
| | - Marie-Ève Picard
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Louis-André Lortie
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada
| | - Sabrina A Attéré
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Hôpital Laval, Québec, Canada
| | - Xiaojun Zhu
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Roger C Levesque
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada
| | - Steve J Charette
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Hôpital Laval, Québec, Canada
| | - Rong Shi
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada.
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11
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Nachon F, Rosenberry TL, Silman I, Sussman JL. A Second Look at the Crystal Structures of Drosophila melanogaster Acetylcholinesterase in Complex with Tacrine Derivatives Provides Insights Concerning Catalytic Intermediates and the Design of Specific Insecticides. Molecules 2020; 25:molecules25051198. [PMID: 32155891 PMCID: PMC7179448 DOI: 10.3390/molecules25051198] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 03/03/2020] [Accepted: 03/04/2020] [Indexed: 11/16/2022] Open
Abstract
Over recent decades, crystallographic software for data processing and structure refinement has improved dramatically, resulting in more accurate and detailed crystal structures. It is, therefore, sometimes valuable to have a second look at "old" diffraction data, especially when earlier interpretation of the electron density maps was rather difficult. Here, we present updated crystal structures of Drosophila melanogaster acetylcholinesterase (DmAChE) originally published in [Harel et al., Prot Sci (2000) 9:1063-1072], which reveal features previously unnoticed. Thus, previously unmodeled density in the native active site can be interpreted as stable acetylation of the catalytic serine. Similarly, a strong density in the DmAChE/ZA complex originally attributed to a sulfate ion is better interpreted as a small molecule that is covalently bound. This small molecule can be modeled as either a propionate or a glycinate. The complex is reminiscent of the carboxylate butyrylcholinesterase complexes observed in crystal structures of human butyrylcholinesterases from various sources, and demonstrates the remarkable ability of cholinesterases to stabilize covalent complexes with carboxylates. A very strong peak of density (10 σ) at covalent distance from the Cβ of the catalytic serine is present in the DmAChE/ZAI complex. This can be undoubtedly attributed to an iodine atom, suggesting an unanticipated iodo/hydroxyl exchange between Ser238 and the inhibitor, possibly driven by the intense X-ray irradiation. Finally, the binding of tacrine-derived inhibitors, such as ZA (1DX4) or the iodinated analog, ZAI (1QON) results in the appearance of an open channel that connects the base of the active-site gorge to the solvent. This channel, which arises due to the absence of the conserved tyrosine present in vertebrate cholinesterases, could be exploited to design inhibitors specific to insect cholinesterases. The present study demonstrates that updated processing of older diffraction images, and the re-refinement of older diffraction data, can produce valuable information that could not be detected in the original analysis, and strongly supports the preservation of the diffraction images in public data banks.
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Affiliation(s)
- Florian Nachon
- Département de Toxicologie et Risques Chimiques, Institut de Recherche Biomédicale des Armées, 91220 Brétigny-sur-Orge, France
- Correspondence: ; Tel.: +33-178-65-1877
| | - Terrone L. Rosenberry
- Departments of Neuroscience and Pharmacology, Mayo Clinic College of Medicine, Jacksonville, FL 32224, USA;
| | - Israel Silman
- Department of Neurobiology, Weizmann Institute of Science, 7610001 Rehovot, Israel;
| | - Joel L. Sussman
- Department of Structural Biology, Weizmann Institute of Science, 7610001 Rehovot, Israel;
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12
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Ayvazyan NM, O'Leary VB, Dolly JO, Ovsepian SV. Neurobiology and therapeutic utility of neurotoxins targeting postsynaptic mechanisms of neuromuscular transmission. Drug Discov Today 2019; 24:1968-1984. [PMID: 31247153 DOI: 10.1016/j.drudis.2019.06.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 05/15/2019] [Accepted: 06/17/2019] [Indexed: 11/28/2022]
Abstract
The neuromuscular junction (NMJ) is the principal site for the translation of motor neurochemical signals to muscle activity. Therefore, the release and sensing machinery of acetylcholine (ACh) along with muscle contraction are two of the main targets of natural toxins and pathogens, causing paralysis. Given pharmacology and medical advances, the active ingredients of toxins that target postsynaptic mechanisms have become of major interest, showing promise as drug leads. Herein, we review key facets of prevalent toxins modulating the mechanisms of ACh sensing and generation of the postsynaptic response, with muscle contraction. We consider the correlation between their outstanding selectivity and potency plus effects on motor function, and discuss emerging data advocating their usage for the development of therapies alleviating neuromuscular dysfunction.
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Affiliation(s)
- Naira M Ayvazyan
- Orbeli Institute of Physiology, National Academy of Sciences of the Republic of Armenia, Yerevan, Armenia.
| | - Valerie B O'Leary
- Department of Medical Genetics, Third Faculty of Medicine, Charles University, Ruská 87, 100 00, Praha 10, Czech Republic
| | - J Oliver Dolly
- International Centre for Neurotherapeutics, Dublin City University, Dublin, Ireland
| | - Saak V Ovsepian
- International Centre for Neurotherapeutics, Dublin City University, Dublin, Ireland; The National Institute of Mental Health, Topolová 748, Klecany, Czech Republic; Department of Psychiatry and Medical Psychology, Third Faculty of Medicine, Charles University, Ruská 87, 100 00, Praha 10, Czech Republic.
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13
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Feng Y, Wang Y, Chu H, Fan Y, Cao X, Liu Y, Li G, Xue S. Stereoselective catalysis controlled by a native leucine or variant isoleucine wing‐gatekeeper in 2‐haloacid dehalogenase. FEBS Lett 2018; 593:308-318. [DOI: 10.1002/1873-3468.13309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 11/21/2018] [Accepted: 11/24/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Yanbin Feng
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China
| | - Yayue Wang
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China
- School of Biology and Food Science Shangqiu Normal University China
| | - Huiying Chu
- Laboratory of Molecular Modeling and Design State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Chinese Academy of Science Dalian China
| | - Yan Fan
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China
- University of Chinese Academy of Sciences Beijing China
| | - Xupeng Cao
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China
| | - Yinghui Liu
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China
| | - Guohui Li
- Laboratory of Molecular Modeling and Design State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Chinese Academy of Science Dalian China
| | - Song Xue
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China
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14
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Roca C, Requena C, Sebastián-Pérez V, Malhotra S, Radoux C, Pérez C, Martinez A, Antonio Páez J, Blundell TL, Campillo NE. Identification of new allosteric sites and modulators of AChE through computational and experimental tools. J Enzyme Inhib Med Chem 2018; 33:1034-1047. [PMID: 29873262 PMCID: PMC6010107 DOI: 10.1080/14756366.2018.1476502] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/09/2018] [Accepted: 05/09/2018] [Indexed: 11/15/2022] Open
Abstract
Allosteric sites on proteins are targeted for designing more selective inhibitors of enzyme activity and to discover new functions. Acetylcholinesterase (AChE), which is most widely known for the hydrolysis of the neurotransmitter acetylcholine, has a peripheral allosteric subsite responsible for amyloidosis in Alzheimer's disease through interaction with amyloid β-peptide. However, AChE plays other non-hydrolytic functions. Here, we identify and characterise using computational tools two new allosteric sites in AChE, which have allowed us to identify allosteric inhibitors by virtual screening guided by structure-based and fragment hotspot strategies. The identified compounds were also screened for in vitro inhibition of AChE and three were observed to be active. Further experimental (kinetic) and computational (molecular dynamics) studies have been performed to verify the allosteric activity. These new compounds may be valuable pharmacological tools in the study of non-cholinergic functions of AChE.
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Affiliation(s)
- Carlos Roca
- a Centro de Investigaciones Biológicas (CIB-CSIC), C/Ramiro de Maeztu , Madrid , Spain
| | - Carlos Requena
- a Centro de Investigaciones Biológicas (CIB-CSIC), C/Ramiro de Maeztu , Madrid , Spain
| | | | - Sony Malhotra
- b Department of Biochemistry , University of Cambridge , Cambridge , UK
| | - Chris Radoux
- b Department of Biochemistry , University of Cambridge , Cambridge , UK
- c Cambridge Crystallographic Data Centre , Cambridge , UK
| | - Concepción Pérez
- d Instituto de Química Médica (IQM-CSIC) , C/Juan de la Cierva , Madrid , Spain
| | - Ana Martinez
- a Centro de Investigaciones Biológicas (CIB-CSIC), C/Ramiro de Maeztu , Madrid , Spain
| | - Juan Antonio Páez
- d Instituto de Química Médica (IQM-CSIC) , C/Juan de la Cierva , Madrid , Spain
| | - Tom L Blundell
- b Department of Biochemistry , University of Cambridge , Cambridge , UK
| | - Nuria E Campillo
- a Centro de Investigaciones Biológicas (CIB-CSIC), C/Ramiro de Maeztu , Madrid , Spain
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15
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Bourne Y, Marchot P. Hot Spots for Protein Partnerships at the Surface of Cholinesterases and Related α/β Hydrolase Fold Proteins or Domains-A Structural Perspective. Molecules 2017; 23:molecules23010035. [PMID: 29295471 PMCID: PMC5943944 DOI: 10.3390/molecules23010035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 12/21/2017] [Accepted: 12/21/2017] [Indexed: 12/12/2022] Open
Abstract
The hydrolytic enzymes acetyl- and butyryl-cholinesterase, the cell adhesion molecules neuroligins, and the hormonogenic macromolecule thyroglobulin are a few of the many members of the α/β hydrolase fold superfamily of proteins. Despite their distinctive functions, their canonical subunits, with a molecular surface area of ~20,000 Å2, they share binding patches and determinants for forming homodimers and for accommodating structural subunits or protein partners. Several of these surface regions of high functional relevance have been mapped through structural or mutational studies, while others have been proposed based on biochemical data or molecular docking studies. Here, we review these binding interfaces and emphasize their specificity versus potentially multifunctional character.
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Affiliation(s)
- Yves Bourne
- Centre National de la Recherche Scientifique, Aix-Marseille Université, "Architecture et Fonction des Macromolécules Biologiques" Laboratory, 13288 Marseille, France.
| | - Pascale Marchot
- Centre National de la Recherche Scientifique, Aix-Marseille Université, "Architecture et Fonction des Macromolécules Biologiques" Laboratory, 13288 Marseille, France.
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16
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Cheung J, Mahmood A, Kalathur R, Liu L, Carlier PR. Structure of the G119S Mutant Acetylcholinesterase of the Malaria Vector Anopheles gambiae Reveals Basis of Insecticide Resistance. Structure 2017; 26:130-136.e2. [PMID: 29276037 DOI: 10.1016/j.str.2017.11.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 11/01/2017] [Accepted: 11/27/2017] [Indexed: 10/18/2022]
Abstract
Malaria is a devastating disease in sub-Saharan Africa and is transmitted by the mosquito Anopheles gambiae. While indoor residual spraying of anticholinesterase insecticides has been useful in controlling the spread of malaria, widespread application of these compounds has led to the rise of an insecticide-resistant mosquito strain that harbors a G119S mutation in the nervous system target enzyme acetylcholinesterase. We demonstrate the atomic basis of insecticide resistance through structure determination of the G119S mutant acetylcholinesterase of An. gambiae in the ligand-free state and bound to a potent difluoromethyl ketone inhibitor. These structures reveal specific features within the active-site gorge distinct from human acetylcholinesterase, including an open channel at the base of the gorge, and provide a means for improving species selectivity in the rational design of improved insecticides for malaria vector control.
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Affiliation(s)
- Jonah Cheung
- New York Structural Biology Center, 89 Convent Avenue, New York, NY 10027, USA.
| | - Arshad Mahmood
- New York Structural Biology Center, 89 Convent Avenue, New York, NY 10027, USA
| | - Ravi Kalathur
- New York Structural Biology Center, 89 Convent Avenue, New York, NY 10027, USA
| | - Lixuan Liu
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, USA
| | - Paul R Carlier
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, USA
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17
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Dafferner AJ, Schopfer LM, Xiao G, Cashman JR, Yerramalla U, Johnson RC, Blake TA, Lockridge O. Immunopurification of Acetylcholinesterase from Red Blood Cells for Detection of Nerve Agent Exposure. Chem Res Toxicol 2017; 30:1897-1910. [PMID: 28892361 PMCID: PMC5646370 DOI: 10.1021/acs.chemrestox.7b00209] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Nerve agents and
organophosphorus pesticides make a covalent bond
with the active site serine of acetylcholinesterase (AChE), resulting
in inhibition of AChE activity and toxic symptoms. AChE in red blood
cells (RBCs) serves as a surrogate for AChE in the nervous system.
Mass spectrometry analysis of adducts on RBC AChE could provide evidence
of exposure. Our goal was to develop a method of immunopurifying human
RBC AChE in quantities adequate for detecting exposure by mass spectrometry.
For this purpose, we immobilized 3 commercially available anti-human
acetylcholinesterase monoclonal antibodies (AE-1, AE-2, and HR2) plus
3 new monoclonal antibodies. The monoclonal antibodies were characterized
for binding affinity, epitope mapping by pairing analysis, and nucleotide
and amino acid sequences. AChE was solubilized from frozen RBCs with
1% (v/v) Triton X-100. A 16 mL sample containing 5.8 μg of RBC
AChE was treated with a quantity of soman model compound that inhibited
50% of the AChE activity. Native and soman-inhibited RBC AChE samples
were immunopurified on antibody–Sepharose beads. The immunopurified
RBC AChE was digested with pepsin and analyzed by liquid chromatography
tandem mass spectrometry on a 6600 Triple-TOF mass spectrometer. The
aged soman-modified PheGlyGluSerAlaGlyAlaAlaSer (FGESAGAAS) peptide
was detected using a targeted analysis method. It was concluded that
all 6 monoclonal antibodies could be used to immunopurify RBC AChE
and that exposure to nerve agents could be detected as adducts on
the active site serine of RBC AChE.
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Affiliation(s)
- Alicia J Dafferner
- Eppley Institute, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
| | - Lawrence M Schopfer
- Eppley Institute, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
| | - Gaoping Xiao
- Syd Labs, Inc , Natick, Massachusetts 01760, United States
| | - John R Cashman
- Human BioMolecular Research Institute , 5310 Eastgate Mall, San Diego, California 92121, United States
| | - Udaya Yerramalla
- Precision Antibody , 91330 Red Branch Rd, Columbia, Maryland 21045, United States
| | - Rudolph C Johnson
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention , 4770 Buford Highway, Chamblee, Georgia 30341, United States
| | - Thomas A Blake
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention , 4770 Buford Highway, Chamblee, Georgia 30341, United States
| | - Oksana Lockridge
- Eppley Institute, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
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18
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Xu Y, Cheng S, Sussman JL, Silman I, Jiang H. Computational Studies on Acetylcholinesterases. Molecules 2017; 22:molecules22081324. [PMID: 28796192 PMCID: PMC6152020 DOI: 10.3390/molecules22081324] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 08/07/2017] [Accepted: 08/07/2017] [Indexed: 01/18/2023] Open
Abstract
Functions of biomolecules, in particular enzymes, are usually modulated by structural fluctuations. This is especially the case in a gated diffusion-controlled reaction catalyzed by an enzyme such as acetylcholinesterase. The catalytic triad of acetylcholinesterase is located at the bottom of a long and narrow gorge, but it catalyzes the extremely rapid hydrolysis of the neurotransmitter, acetylcholine, with a reaction rate close to the diffusion-controlled limit. Computational modeling and simulation have produced considerable advances in exploring the dynamical and conformational properties of biomolecules, not only aiding in interpreting the experimental data, but also providing insights into the internal motions of the biomolecule at the atomic level. Given the remarkably high catalytic efficiency and the importance of acetylcholinesterase in drug development, great efforts have been made to understand the dynamics associated with its functions by use of various computational methods. Here, we present a comprehensive overview of recent computational studies on acetylcholinesterase, expanding our views of the enzyme from a microstate of a single structure to conformational ensembles, strengthening our understanding of the integration of structure, dynamics and function associated with the enzyme, and promoting the structure-based and/or mechanism-based design of new inhibitors for it.
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Affiliation(s)
- Yechun Xu
- CAS Key Laboratory of Receptor Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences (CAS), Shanghai 201203, China.
| | - Shanmei Cheng
- CAS Key Laboratory of Receptor Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences (CAS), Shanghai 201203, China.
| | - Joel L Sussman
- Israel Structural Proteomics Center, Weizmann Institute of Science, Rehovot 76100, Israel.
- Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel.
| | - Israel Silman
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel.
| | - Hualiang Jiang
- CAS Key Laboratory of Receptor Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences (CAS), Shanghai 201203, China.
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19
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Silman I, Sussman JL. Recent developments in structural studies on acetylcholinesterase. J Neurochem 2017; 142 Suppl 2:19-25. [PMID: 28503857 DOI: 10.1111/jnc.13992] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This review focuses on several recent developments concerning structure-function relationships in vertebrate acetylcholinesterase. These include studies on high-resolution structures of human acetylcholinesterase and its complexes; the first crystal structure of a snake venom acetylcholinesterase, in which open and closed states of the 'back door' are visualized; a powerful algorithm for redesigning proteins for enhanced expression in prokaryotic systems, as applied to human acetylcholinesterase, which has hitherto been an intractable target; in situ implementation of 'click chemistry' in crystalline acetylcholinesterase, which yields novel insights into the steric and dynamic changes involved in the reaction within the active-site gorge; and a study that demonstrates the effect of crystallization conditions on ligand alignment within a protein complex, in this case the methylene blue-Torpedo californica acetylcholinesterase complex, which highlights the relevance of the precipitant employed to structure-based drug design. This is an article for the special issue XVth International Symposium on Cholinergic Mechanisms.
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Affiliation(s)
- Israel Silman
- Department of Neurobiology, Weizmann Institute of Science, Rehovot, Israel
| | - Joel L Sussman
- Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel
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