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Park JH, Reviello RE, Loll PJ. Crystal structure of vancomycin bound to the resistance determinant D-alanine-D-serine. IUCRJ 2024; 11:133-139. [PMID: 38277167 PMCID: PMC10916290 DOI: 10.1107/s2052252524000289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 01/08/2024] [Indexed: 01/27/2024]
Abstract
Vancomycin is a glycopeptide antibiotic that for decades has been a mainstay of treatment for persistent bacterial infections. However, the spread of antibiotic resistance threatens its continued utility. In particular, vancomycin-resistant enterococci (VRE) have become a pressing clinical challenge. Vancomycin acts by binding and sequestering the intermediate Lipid II in cell-wall biosynthesis, specifically recognizing a D-alanine-D-alanine dipeptide motif within the Lipid II molecule. VRE achieve resistance by remodeling this motif to either D-alanine-D-lactate or D-alanine-D-serine; the former substitution essentially abolishes recognition by vancomycin of Lipid II, whereas the latter reduces the affinity of the antibiotic by roughly one order of magnitude. The complex of vancomycin bound to D-alanine-D-serine has been crystallized, and its 1.20 Å X-ray crystal structure is presented here. This structure reveals that the D-alanine-D-serine ligand is bound in essentially the same position and same pose as the native D-alanine-D-alanine ligand. The serine-containing ligand appears to be slightly too large to be comfortably accommodated in this way, suggesting one possible contribution to the reduced binding affinity. In addition, two flexible hydroxyl groups - one from the serine side chain of the ligand, and the other from a glucose sugar on the antibiotic - are locked into single conformations in the complex, which is likely to contribute an unfavorable entropic component to the recognition of the serine-containing ligand.
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Affiliation(s)
- Jee Hoon Park
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, PA 19102, USA
| | - Rachel E. Reviello
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, PA 19102, USA
| | - Patrick J. Loll
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, PA 19102, USA
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2
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Moral R, Paul S. Exploring Cyclic Peptide Nanotube Stability Across Diverse Lipid Bilayers and Unveiling Water Transport Dynamics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:882-895. [PMID: 38134046 DOI: 10.1021/acs.langmuir.3c03030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2023]
Abstract
Cyclic Peptide Nanotubes (CPNTs) have emerged as compelling candidates for various applications, particularly as nanochannels within lipid bilayers. In this study, the stability of two CPNTs, namely 8 × [(Cys-Gly-Met-Gly)2] and 8 × [(Gly-Leu)4], are comprehensively investigated across different lipid bilayers, including 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), a mixed model membrane (POPE/POPG), and a realistic yeast model membrane. The results demonstrate that both CPNTs maintain their tubular structures in all lipid bilayers, with [(Cys-Gly-Met-Gly)2] showing increased stability over an extended period in these lipid membranes. The insertion of CPNTs shows negligible impact on lipid bilayer properties, including area per lipid, volume per lipid, and bilayer thickness. The study demonstrates that the CPNT preserves its two-line water movement pattern within all the lipid membranes, reaffirming their potential as water channels. The MSD curves further reveal that the dynamics of water molecules inside the nanotube are similar for all the bilayer systems with minor differences that arise due to different lipid environments.
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Affiliation(s)
- Rimjhim Moral
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
| | - Sandip Paul
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
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3
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Moral R, Paul S. Influence of salt and temperature on the self-assembly of cyclic peptides in water: a molecular dynamics study. Phys Chem Chem Phys 2023; 25:5406-5422. [PMID: 36723368 DOI: 10.1039/d2cp05160e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
It is found in the literature that cyclic peptides (CPs) are able to self-assemble in water to form cyclic peptide nanotubes (CPNTs) and are used extensively in the field of nanotechnology. Several factors influence the formation and stability of these nanotubes in water. However, an extensive study of the contribution of several important factors is still lacking. The purpose of this study is to explore the effect of temperature and salt (NaCl) on the association tendency of CPs. Furthermore, the self-association behavior of CPs in aqueous solutions at various temperatures is also thoroughly discussed. Cyclo-[(Asp-D-Leu-Lys-D-Leu)2] is considered for this study and a series of classical molecular dynamics (MD) simulations at three different temperatures, viz. 280 K, 300 K, and 320 K, both in pure water and in NaCl solutions of different concentrations are carried out. The calculations of radial distribution functions, preferential interaction parameters, cluster formation and hydrogen bonding properties suggest a strong influence of NaCl concentration on the association propensity of CPs. Low NaCl concentration hinders CP association while high NaCl concentration facilitates the association of CPs. Besides this, the association of CPs is found to be enhanced at low temperature. Furthermore, the thermodynamics of CP association is predominantly found to be enthalpy driven in both the presence and absence of salt. No crossover between enthalpy and entropy in CP association is observed. In addition, the MM-GBSA method is used to investigate the binding free energies of the CP rings that self-assembled to form nanotube like structures at all three temperatures.
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Affiliation(s)
- Rimjhim Moral
- Department of Chemistry, Indian Institute of Technology, Guwahati Assam, 781039, India.
| | - Sandip Paul
- Department of Chemistry, Indian Institute of Technology, Guwahati Assam, 781039, India.
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4
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Structure of VanS from vancomycin-resistant enterococci: A sensor kinase with weak ATP binding. J Biol Chem 2023; 299:103001. [PMID: 36764524 PMCID: PMC10017428 DOI: 10.1016/j.jbc.2023.103001] [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: 12/15/2022] [Revised: 01/28/2023] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
The VanRS two-component system regulates the resistance phenotype of vancomycin-resistant enterococci. VanS is a sensor histidine kinase that responds to the presence of vancomycin by autophosphorylating and subsequently transferring the phosphoryl group to the response regulator, VanR. The phosphotransfer activates VanR as a transcription factor, which initiates the expression of resistance genes. Structural information about VanS proteins has remained elusive, hindering the molecular-level understanding of their function. Here, we present X-ray crystal structures for the catalytic and ATP-binding (CA) domains of two VanS proteins, derived from vancomycin-resistant enterococci types A and C. Both proteins adopt the canonical Bergerat fold that has been observed for CA domains of other prokaryotic histidine kinases. We attempted to determine structures for the nucleotide-bound forms of both proteins; however, despite repeated efforts, these forms could not be crystallized, prompting us to measure the proteins' binding affinities for ATP. Unexpectedly, both CA domains displayed low affinities for the nucleotide, with KD values in the low millimolar range. Since these KD values are comparable to intracellular ATP concentrations, this weak substrate binding could reflect a way of regulating expression of the resistance phenotype.
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5
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The Roles of the Two-Component System, MtrAB, in Response to Diverse Cell Envelope Stresses in Dietzia sp. DQ12-45-1b. Appl Environ Microbiol 2022; 88:e0133722. [PMID: 36190258 PMCID: PMC9599347 DOI: 10.1128/aem.01337-22] [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] [Indexed: 11/30/2022] Open
Abstract
Two-component systems (TCSs) act as common regulatory systems allowing bacteria to detect and respond to multiple environmental stimuli, including cell envelope stress. The MtrAB TCS of Actinobacteria is critical for cell wall homeostasis, cell proliferation, osmoprotection, and antibiotic resistance, and thus is found to be highly conserved across this phylum. However, how precisely the MtrAB TCS regulates cellular homeostasis in response to environmental stress remains unclear. Here, we show that the MtrAB TCS plays an important role in the tolerance to different types of cell envelope stresses, including environmental stresses (i.e., oxidative stress, lysozyme, SDS, osmotic pressure, and alkaline pH stresses) and envelope-targeting antibiotics (i.e., isoniazid, ethambutol, glycopeptide, and β-lactam antibiotics) in Dietzia sp. DQ12-45-1b. An mtrAB mutant strain exhibited slower growth compared to the wild-type strain and was characterized by abnormal cell shapes when exposed to various environmental stresses. Moreover, deletion of mtrAB resulted in decreased resistance to isoniazid, ethambutol, and β-lactam antibiotics. Further, Cleavage under targets and tagmentation sequencing (CUT&Tag-seq) and electrophoretic mobility shift assays (EMSAs) revealed that MtrA binds the promoters of genes involved in peptidoglycan biosynthesis (ldtB, ldtA, murJ), hydrolysis (GJR88_03483, GJR88_4713), and cell division (ftsE). Together, our findings demonstrated that the MtrAB TCS is essential for the survival of Dietzia sp. DQ12-45-1b under various cell envelope stresses, primarily by controlling multiple downstream cellular pathways. Our work suggests that TCSs act as global sensors and regulators in maintaining cellular homeostasis, such as during episodes of various environmental stresses. The present study should shed light on the understanding of mechanisms for bacterial adaptivity to extreme environments. IMPORTANCE The multilayered cell envelope is the first line of bacterial defense against various extreme environments. Bacteria utilize a large number of sensing and regulatory systems to maintain cell envelope homeostasis under multiple stress conditions. The two-component system (TCS) is the main sensing and responding apparatus for environmental adaptation. The MtrAB TCS highly conserved in Actinobacteria is critical for cell wall homeostasis, cell proliferation, osmoprotection, and antibiotic resistance. However, how MtrAB works with regard to signals impacting changes to the cell envelope is not fully understood. Here, we found that in the Actinobacterium Dietzia sp. DQ12-45-1b, a TCS named MtrAB is pivotal for ensuring normal cell growth as well as maintaining proper cell morphology in response to various cell envelope stresses, namely, by regulating the expression of cell envelope-related genes. Our findings should greatly advance our understanding of the adaptive mechanisms responsible for maintaining cell integrity in times of sustained environmental shocks.
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6
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Charitou V, van Keulen SC, Bonvin AMJJ. Cyclization and Docking Protocol for Cyclic Peptide-Protein Modeling Using HADDOCK2.4. J Chem Theory Comput 2022; 18:4027-4040. [PMID: 35652781 PMCID: PMC9202357 DOI: 10.1021/acs.jctc.2c00075] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An emerging class of therapeutic molecules are cyclic peptides with over 40 cyclic peptide drugs currently in clinical use. Their mode of action is, however, not fully understood, impeding rational drug design. Computational techniques could positively impact their design, but modeling them and their interactions remains challenging due to their cyclic nature and their flexibility. This study presents a step-by-step protocol for generating cyclic peptide conformations and docking them to their protein target using HADDOCK2.4. A dataset of 30 cyclic peptide-protein complexes was used to optimize both cyclization and docking protocols. It supports peptides cyclized via an N- and C-terminus peptide bond and/or a disulfide bond. An ensemble of cyclic peptide conformations is then used in HADDOCK to dock them onto their target protein using knowledge of the binding site on the protein side to drive the modeling. The presented protocol predicts at least one acceptable model according to the critical assessment of prediction of interaction criteria for each complex of the dataset when the top 10 HADDOCK-ranked single structures are considered (100% success rate top 10) both in the bound and unbound docking scenarios. Moreover, its performance in both bound and fully unbound docking is similar to the state-of-the-art software in the field, Autodock CrankPep. The presented cyclization and docking protocol should make HADDOCK a valuable tool for rational cyclic peptide-based drug design and high-throughput screening.
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Affiliation(s)
- Vicky Charitou
- Computational Structural Biology Group, Bijvoet Centre for Biomolecular Research, Science for Life, Faculty of Science─Chemistry, Utrecht University, Padualaan 8, Utrecht 3584 CH, The Netherlands
| | - Siri C van Keulen
- Computational Structural Biology Group, Bijvoet Centre for Biomolecular Research, Science for Life, Faculty of Science─Chemistry, Utrecht University, Padualaan 8, Utrecht 3584 CH, The Netherlands
| | - Alexandre M J J Bonvin
- Computational Structural Biology Group, Bijvoet Centre for Biomolecular Research, Science for Life, Faculty of Science─Chemistry, Utrecht University, Padualaan 8, Utrecht 3584 CH, The Netherlands
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7
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Wenski SL, Thiengmag S, Helfrich EJ. Complex peptide natural products: Biosynthetic principles, challenges and opportunities for pathway engineering. Synth Syst Biotechnol 2022; 7:631-647. [PMID: 35224231 PMCID: PMC8842026 DOI: 10.1016/j.synbio.2022.01.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 01/03/2023] Open
Abstract
Complex peptide natural products exhibit diverse biological functions and a wide range of physico-chemical properties. As a result, many peptides have entered the clinics for various applications. Two main routes for the biosynthesis of complex peptides have evolved in nature: ribosomally synthesized and post-translationally modified peptide (RiPP) biosynthetic pathways and non-ribosomal peptide synthetases (NRPSs). Insights into both bioorthogonal peptide biosynthetic strategies led to the establishment of universal principles for each of the two routes. These universal rules can be leveraged for the targeted identification of novel peptide biosynthetic blueprints in genome sequences and used for the rational engineering of biosynthetic pathways to produce non-natural peptides. In this review, we contrast the key principles of both biosynthetic routes and compare the different biochemical strategies to install the most frequently encountered peptide modifications. In addition, the influence of the fundamentally different biosynthetic principles on past, current and future engineering approaches is illustrated. Despite the different biosynthetic principles of both peptide biosynthetic routes, the arsenal of characterized peptide modifications encountered in RiPP and NRPS systems is largely overlapping. The continuous expansion of the biocatalytic toolbox of peptide modifying enzymes for both routes paves the way towards the production of complex tailor-made peptides and opens up the possibility to produce NRPS-derived peptides using the ribosomal route and vice versa.
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Affiliation(s)
- Sebastian L. Wenski
- Institute for Molecular Bio Science, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
- LOEWE Center for Translational Biodiversity Genomics (TBG), 60325, Frankfurt am Main, Germany
| | - Sirinthra Thiengmag
- Institute for Molecular Bio Science, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
- LOEWE Center for Translational Biodiversity Genomics (TBG), 60325, Frankfurt am Main, Germany
| | - Eric J.N. Helfrich
- Institute for Molecular Bio Science, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
- LOEWE Center for Translational Biodiversity Genomics (TBG), 60325, Frankfurt am Main, Germany
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8
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Guffey AA, Loll PJ. Regulation of Resistance in Vancomycin-Resistant Enterococci: The VanRS Two-Component System. Microorganisms 2021; 9:2026. [PMID: 34683347 PMCID: PMC8541618 DOI: 10.3390/microorganisms9102026] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/21/2021] [Accepted: 09/22/2021] [Indexed: 01/20/2023] Open
Abstract
Vancomycin-resistant enterococci (VRE) are a serious threat to human health, with few treatment options being available. New therapeutics are urgently needed to relieve the health and economic burdens presented by VRE. A potential target for new therapeutics is the VanRS two-component system, which regulates the expression of vancomycin resistance in VRE. VanS is a sensor histidine kinase that detects vancomycin and in turn activates VanR; VanR is a response regulator that, when activated, directs expression of vancomycin-resistance genes. This review of VanRS examines how the expression of vancomycin resistance is regulated, and provides an update on one of the field's most pressing questions: How does VanS sense vancomycin?
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Affiliation(s)
| | - Patrick J. Loll
- Department of Biochemistry & Molecular Biology, College of Medicine, Drexel University, Philadelphia, PA 19102, USA;
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9
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Izsépi L, Erdei R, Tevyashova AN, Grammatikova NE, Shchekotikhin AE, Herczegh P, Batta G. Bacterial Cell Wall Analogue Peptides Control the Oligomeric States and Activity of the Glycopeptide Antibiotic Eremomycin: Solution NMR and Antimicrobial Studies. Pharmaceuticals (Basel) 2021; 14:ph14020083. [PMID: 33499349 PMCID: PMC7911593 DOI: 10.3390/ph14020083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/05/2021] [Accepted: 01/18/2021] [Indexed: 12/18/2022] Open
Abstract
For some time, glycopeptide antibiotics have been considered the last line of defense against Methicillin-resistant Staphylococcus aureus (MRSA). However, vancomycin resistance of Gram-positive bacteria is an increasingly emerging worldwide health problem. The mode of action of glycopeptide antibiotics is essentially the binding of peptidoglycan cell-wall fragments terminating in the d-Ala-d-Ala sequence to the carboxylate anion binding pocket of the antibiotic. Dimerization of these antibiotics in aqueous solution was shown to persist and even to enhance the antibacterial effect in a co-operative manner. Some works based on solid state (ss) Nuclear Magnetic Resonance (NMR) studies questioned the presence of dimers under the conditions of ssNMR while in a few cases, higher-order oligomers associated with contiguous back-to-back and face-to-face dimers were observed in the crystal phase. However, it is not proved if such oligomers persist in aqueous solutions. With the aid of 15N-labelled eremomycin using 15N relaxation and diffusion NMR methods, we observed tetramers and octamers when the N-Ac-d-Ala-d-Ala dipeptide was added. To the contrary, the N-Ac-d-Ala or (N-Ac)2-l-Lys-d-Ala-d-Ala tripeptide did not induce higher-order oligomers. These observations are interesting examples of tailored supramolecular self-organization. New antimicrobial tests have also been carried out with these self-assemblies against MRSA and VRE (resistant) strains.
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Affiliation(s)
- László Izsépi
- Doctoral School of Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1., Hungary;
- Department of Organic Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1., Hungary;
| | - Réka Erdei
- Department of Organic Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1., Hungary;
| | - Anna N. Tevyashova
- Gause Institute of New Antibiotics, 11 B. Pirogovskaya, 119021 Moscow, Russia; (A.N.T.); (N.E.G.); (A.E.S.)
| | - Natalia E. Grammatikova
- Gause Institute of New Antibiotics, 11 B. Pirogovskaya, 119021 Moscow, Russia; (A.N.T.); (N.E.G.); (A.E.S.)
| | - Andrey E. Shchekotikhin
- Gause Institute of New Antibiotics, 11 B. Pirogovskaya, 119021 Moscow, Russia; (A.N.T.); (N.E.G.); (A.E.S.)
| | - Pál Herczegh
- Department of Pharmaceutical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1., Hungary;
| | - Gyula Batta
- Department of Organic Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1., Hungary;
- Correspondence:
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10
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Li Q, Cebrián R, Montalbán-López M, Ren H, Wu W, Kuipers OP. Outer-membrane-acting peptides and lipid II-targeting antibiotics cooperatively kill Gram-negative pathogens. Commun Biol 2021; 4:31. [PMID: 33398076 PMCID: PMC7782785 DOI: 10.1038/s42003-020-01511-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 11/11/2020] [Indexed: 02/08/2023] Open
Abstract
The development and dissemination of antibiotic-resistant bacterial pathogens is a growing global threat to public health. Novel compounds and/or therapeutic strategies are required to face the challenge posed, in particular, by Gram-negative bacteria. Here we assess the combined effect of potent cell-wall synthesis inhibitors with either natural or synthetic peptides that can act on the outer-membrane. Thus, several linear peptides, either alone or combined with vancomycin or nisin, were tested against selected Gram-negative pathogens, and the best one was improved by further engineering. Finally, peptide D-11 and vancomycin displayed a potent antimicrobial activity at low μM concentrations against a panel of relevant Gram-negative pathogens. This combination was highly active in biological fluids like blood, but was non-hemolytic and non-toxic against cell lines. We conclude that vancomycin and D-11 are safe at >50-fold their MICs. Based on the results obtained, and as a proof of concept for the newly observed synergy, a Pseudomonas aeruginosa mouse infection model experiment was also performed, showing a 4 log10 reduction of the pathogen after treatment with the combination. This approach offers a potent alternative strategy to fight (drug-resistant) Gram-negative pathogens in humans and mammals.
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Affiliation(s)
- Qian Li
- grid.4830.f0000 0004 0407 1981Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands ,grid.34418.3a0000 0001 0727 9022Present Address: State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, 430062 Wuhan, China
| | - Rubén Cebrián
- grid.4830.f0000 0004 0407 1981Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands
| | - Manuel Montalbán-López
- grid.4830.f0000 0004 0407 1981Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands ,grid.4489.10000000121678994Present Address: Department of Microbiology, Faculty of Sciences, University of Granada, Av. Fuentenueva s/n, 18071 Granada, Spain
| | - Huan Ren
- grid.216938.70000 0000 9878 7032State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Microbiology and Technology of the Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, 30071 Tianjin, China
| | - Weihui Wu
- grid.216938.70000 0000 9878 7032State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Microbiology and Technology of the Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, 30071 Tianjin, China
| | - Oscar P. Kuipers
- grid.4830.f0000 0004 0407 1981Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands
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11
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Li Y, Li L, Ma Y, Zhang K, Li G, Lu B, Lu C, Chen C, Wang L, Wang H, Cui X. 3D-Printed Titanium Cage with PVA-Vancomycin Coating Prevents Surgical Site Infections (SSIs). Macromol Biosci 2020; 20:e1900394. [PMID: 32065462 DOI: 10.1002/mabi.201900394] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/20/2020] [Indexed: 01/14/2023]
Abstract
Many coating materials have been studied to prevent surgical site infections (SSIs). However, antibacterial coating on surfaces show weak adhesion using the traditional titanium (Ti) cage, resulting in low efficacy for preventing SSIs after spinal surgery. Herein, a 3D-printed Ti cage combined with a drug-releasing system is developed for in situ drug release and bacteria killing, leading to prevention of SSIs in vitro and in vivo. First, a 3D-printed Ti cage is designed and prepared by the Electron Beam Melting (EBM) method. Second, polyvinyl alcohol (PVA) containing hydrophilic vancomycin hydrochloride (VH) is scattered across the surface of 3D-printed porous Ti (Ti-VH@PVA) cages. Ti-VH@PVA cages show an efficient drug-releasing profile and excellent bactericidal effect for three common bacteria after more than seven days in vitro. In addition, Ti-VH@PVA cages exhibit reliable inhibition of inflammation associated with Staphylococcus aureus and effective bone regeneration capacity in a rabbit model of SSIs. The results indicate that Ti-VH@PVA cages have potential advantages for preventing SSIs after spinal surgery.
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Affiliation(s)
- Yuan Li
- Department of Orthopaedics, The 8th Medical Center of Chinese PLA General Hospital, Beijing, 100091, China.,CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, China.,College of Medicine, Southwest Jiaotong University, Chengdu, 610031, China
| | - Litao Li
- Department of Orthopaedics, The 8th Medical Center of Chinese PLA General Hospital, Beijing, 100091, China
| | - Yiguang Ma
- Department of Orthopaedics, The 8th Medical Center of Chinese PLA General Hospital, Beijing, 100091, China.,CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Kuo Zhang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Guang Li
- Department of Orthopaedics, The 8th Medical Center of Chinese PLA General Hospital, Beijing, 100091, China.,CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Bin Lu
- Department of Orthopaedics, The 8th Medical Center of Chinese PLA General Hospital, Beijing, 100091, China
| | - Chenglin Lu
- Shandong Weigao Orthopedic Device Co., Ltd., No. 26 Xiangjiang Street, Tourist Resorts, Weihai, 264200, Shandong Province, China
| | - Cheng Chen
- Shandong Weigao Orthopedic Device Co., Ltd., No. 26 Xiangjiang Street, Tourist Resorts, Weihai, 264200, Shandong Province, China
| | - Lei Wang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Hao Wang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Xu Cui
- Department of Orthopaedics, The 8th Medical Center of Chinese PLA General Hospital, Beijing, 100091, China
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12
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Zou Z, Sun J, Li Q, Pu Y, Liu J, Sun R, Wang L, Jiang T. Vancomycin modified copper sulfide nanoparticles for photokilling of vancomycin-resistant enterococci bacteria. Colloids Surf B Biointerfaces 2020; 189:110875. [PMID: 32087532 DOI: 10.1016/j.colsurfb.2020.110875] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/13/2020] [Accepted: 02/12/2020] [Indexed: 10/25/2022]
Abstract
Due to the overuse of antibiotics, vancomycin resistant enterococci (VRE) has caused serious infections and become more and more difficult to deal with. Herein, we reported a facile one-pot strategy to synthesize copper sulfide nanoparticles using vancomycin (Van) as reductant and capping agent (CuS@Van). The as-prepared CuS@Van nanocomposites presented excellent uniformity in particle size and strong near infrared (NIR) absorbance. Fourier Transform infrared spectroscopy (FTIR) and Energy dispersive spectrometry (EDS) analysis confirmed the successful modification of Van molecules on the surface of CuS@Van nanoparticles. Bacterial TEM images verified the specific binding affinity between CuS@Van and VRE pathogen. CuS@Van also exhibited effective photokilling capability based on a combination of photothermal therapy (PTT) and photodynamic therapy (PDT). Fluorescent bacterial viability staining and bacterial growth curves monitoring were performed to explore the photokilling ablation of CuS@Van against VRE pathogens. The in vitro results indicated that CuS@Van nanocomposites had no antibacterial activity in the dark but displayed satisfying bactericidal effect against VRE pathogens upon the NIR irradiation. Mouse infection assays were also implemented to evaluate in vivo antibacterial photokilling effectiveness. CuS@Van with NIR irradiation showed the highest antibacterial capability and fastest infection regression compared with the control groups. Considering the low cost, easy preparation, good biocompatibility and excellent photokilling capability, CuS@Van nanocomposites will shed bright light on the photokilling ablation of vancomycin-resistant pathogenic bacteria.
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Affiliation(s)
- Zhonghao Zou
- School of Life Sciences, Ludong University, Yantai 264025, China
| | - Jie Sun
- School of Life Sciences, Ludong University, Yantai 264025, China
| | - Qing Li
- School of Life Sciences, Ludong University, Yantai 264025, China
| | - Yang Pu
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Jiaqi Liu
- School of Life Sciences, Ludong University, Yantai 264025, China
| | - Ruiqi Sun
- School of Life Sciences, Ludong University, Yantai 264025, China
| | - Luyao Wang
- School of Life Sciences, Ludong University, Yantai 264025, China
| | - Tingting Jiang
- School of Life Sciences, Ludong University, Yantai 264025, China.
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13
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Zhen JB, Zhao MH, Ge Y, Liu Y, Xu LW, Chen C, Gong YK, Yang KW. Construction, mechanism, and antibacterial resistance insight into polypeptide-based nanoparticles. Biomater Sci 2019; 7:4142-4152. [DOI: 10.1039/c9bm01050e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Demonstration of the bactericidal mechanism of self-assembled nanoparticles.
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Affiliation(s)
- Jian-Bin Zhen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Chemical Biology Innovation Laboratory
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
| | - Mu-Han Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Chemical Biology Innovation Laboratory
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
| | - Ying Ge
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Chemical Biology Innovation Laboratory
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
| | - Ya Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Chemical Biology Innovation Laboratory
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
| | - Li-Wei Xu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Chemical Biology Innovation Laboratory
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
| | - Cheng Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Chemical Biology Innovation Laboratory
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
| | - Yong-Kuan Gong
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Chemical Biology Innovation Laboratory
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
| | - Ke-Wu Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Chemical Biology Innovation Laboratory
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
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14
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Ślusarz R, Samaszko-Fiertek J, Dmochowska B, Madaj J. Molecular dynamics study on the influence of C-terminal sugar substitution on dynamics and conformation of vancomycin derivatives. J Carbohydr Chem 2017. [DOI: 10.1080/07328303.2017.1347669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Rafał Ślusarz
- Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
| | | | | | - Janusz Madaj
- Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
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15
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Hassan MM, Ranzoni A, Phetsang W, Blaskovich MAT, Cooper MA. Surface Ligand Density of Antibiotic-Nanoparticle Conjugates Enhances Target Avidity and Membrane Permeabilization of Vancomycin-Resistant Bacteria. Bioconjug Chem 2016; 28:353-361. [DOI: 10.1021/acs.bioconjchem.6b00494] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Marwa M. Hassan
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Andrea Ranzoni
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Wanida Phetsang
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Mark A. T. Blaskovich
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Matthew A. Cooper
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
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16
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Schofield SC, Berno B, Langman M, Hall G, Filiaggi MJ. Gelled Calcium Polyphosphate Matrices Delay Antibiotic Release. J Dent Res 2016; 85:643-7. [PMID: 16798866 DOI: 10.1177/154405910608500712] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Introducing a gelling step during antibiotic incorporation has previously been found to delay vancomycin delivery from a calcium polyphosphate matrix intended for local treatment of bone infections. This study examined the general applicability of this approach using cefuroxime, a lower-molecular-weight antibiotic with different charge characteristics compared with those of vancomycin. A calcium polyphosphate/cefuroxime paste was “gelled” in disk form in a humid environment for 5 or 24 hours prior to drying. Antibiotic release in Tris-buffered saline under gentle agitation was monitored over a seven-day period. While non-gelled samples clearly exhibited a burst release, the gelling process significantly retarded early antibiotic release from five- and 24-hour gelled matrices, yielding a constant release rate over the first four days. Cefuroxime incorporation did not appear to alter matrix structure or degradation. Overall, this non-aggressive process effectively trapped cefuroxime and reduced its release rate, suggesting its potential applicability with molecularly diverse therapeutic agents.
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Affiliation(s)
- S C Schofield
- Department of Applied Oral Sciences, Faculty of Dentistry, Dalhousie University, 5981 University Avenue, Halifax, Nova Scotia B3H 3J5, Canada
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17
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Gherdaoui D, Bekdouche H, Zerkout S, Fegas R, Righezza M. Chiral separation of ketoprofen on an achiral NH2 column by HPLC using vancomycin as chiral mobile phase additive. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2016. [DOI: 10.1007/s13738-016-0951-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Chang J, Zhou H, Preobrazhenskaya M, Tao P, Kim SJ. The Carboxyl Terminus of Eremomycin Facilitates Binding to the Non-d-Ala-d-Ala Segment of the Peptidoglycan Pentapeptide Stem. Biochemistry 2016; 55:3383-91. [PMID: 27243469 PMCID: PMC6020039 DOI: 10.1021/acs.biochem.6b00188] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Glycopeptide antibiotics inhibit cell wall biosynthesis in Gram-positive bacteria by targeting the peptidoglycan (PG) pentapeptide stem structure (l-Ala-d-iso-Gln-l-Lys-d-Ala-d-Ala). Structures of the glycopeptide complexed with a PG stem mimic have shown that the d-Ala-d-Ala segment is the primary drug binding site; however, biochemical evidence suggests that the glycopeptide-PG interaction involves more than d-Ala-d-Ala binding. Interactions of the glycopeptide with the non-d-Ala-d-Ala segment of the PG stem were investigated using solid-state nuclear magnetic resonance (NMR). LCTA-1421, a double (15)N-enriched eremomycin derivative with a C-terminal [(15)N]amide and [(15)N]Asn amide, was complexed with whole cells of Staphylococcus aureus grown in a defined medium containing l-[3-(13)C]Ala and d-[1-(13)C]Ala in the presence of alanine racemase inhibitor alaphosphin. (13)C{(15)N} and (15)N{(13)C} rotational-echo double-resonance (REDOR) NMR measurements determined the (13)C-(15)N internuclear distances between the [(15)N]Asn amide of LCTA-1421 and the (13)C atoms of the bound d-[1-(13)C]Ala-d-[1-(13)C]Ala to be 5.1 and 4.8 Å, respectively. These measurements also determined the distance from the C-terminal [(15)N]amide of LCTA-1421 to the l-[3-(13)C]Ala of PG to be 3.5 Å. The measured REDOR distance constraints position the C-terminus of the glycopeptide in the proximity of the l-Ala of the PG, suggesting that the C-terminus of the glycopeptide interacts near the l-Ala segment of the PG stem. In vivo REDOR measurements provided structural insight into how C-terminally modified glycopeptide antibiotics operate.
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Affiliation(s)
- James Chang
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76706
| | - Hongyu Zhou
- Department of Chemistry, Center for Drug Discovery, Design, and Delivery (CD4), Center for Scientific Computation, Southern Methodist University, Dallas, TX 7 5275, USA
| | | | - Peng Tao
- Department of Chemistry, Center for Drug Discovery, Design, and Delivery (CD4), Center for Scientific Computation, Southern Methodist University, Dallas, TX 7 5275, USA
| | - Sung Joon Kim
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76706
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19
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Pawlowski AC, Johnson JW, Wright GD. Evolving medicinal chemistry strategies in antibiotic discovery. Curr Opin Biotechnol 2016; 42:108-117. [PMID: 27116217 DOI: 10.1016/j.copbio.2016.04.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/03/2016] [Accepted: 04/05/2016] [Indexed: 10/21/2022]
Abstract
Chemical modification of synthetic or natural product antibiotic scaffolds to expand potency and spectrum and to bypass mechanisms of resistance has dominated antibiotic drug discovery and proven immensely successful. However, the inexorable evolution of drug resistance coupled with a drought in innovation in antibiotic discovery contribute to a dearth of new drugs entering to market. Better understanding of the physicochemical properties of antibiotic chemical space is required to inform new antibiotic discovery. Innovations such as the development of antibiotic adjuvants to preserve efficacy of existing drugs together with expanding antibiotic chemical diversity through synthetic biology or new techniques to mine antibiotic producing organisms, are required to bridge the growing gap between the need for new drugs and their discovery.
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Affiliation(s)
- Andrew C Pawlowski
- Michael G. DeGroote Institute for Infectious Disease Research and the Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Jarrod W Johnson
- Michael G. DeGroote Institute for Infectious Disease Research and the Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Gerard D Wright
- Michael G. DeGroote Institute for Infectious Disease Research and the Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada.
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20
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McHugh SM, Rogers JR, Yu H, Lin YS. Insights into How Cyclic Peptides Switch Conformations. J Chem Theory Comput 2016; 12:2480-8. [DOI: 10.1021/acs.jctc.6b00193] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sean M. McHugh
- Department
of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Julia R. Rogers
- Department
of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Hongtao Yu
- Department
of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Yu-Shan Lin
- Department
of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
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21
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Abstract
Cyclic peptides are a promising class of molecules that can be used to target specific protein-protein interactions. A computational method to accurately predict their structures would substantially advance the development of cyclic peptides as modulators of protein-protein interactions. Here, we develop a computational method that integrates bias-exchange metadynamics simulations, a Boltzmann reweighting scheme, dihedral principal component analysis and a modified density peak-based cluster analysis to provide a converged structural description for cyclic peptides. Using this method, we evaluate the performance of a number of popular protein force fields on a model cyclic peptide. All the tested force fields seem to over-stabilize the α-helix and PPII/β regions in the Ramachandran plot, commonly populated by linear peptides and proteins. Our findings suggest that re-parameterization of a force field that well describes the full Ramachandran plot is necessary to accurately model cyclic peptides.
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Affiliation(s)
- Hongtao Yu
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA.
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22
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Chen S, Wu Q, Shen Q, Wang H. Progress in Understanding the Genetic Information and Biosynthetic Pathways behind Amycolatopsis Antibiotics, with Implications for the Continued Discovery of Novel Drugs. Chembiochem 2015; 17:119-28. [PMID: 26503579 DOI: 10.1002/cbic.201500542] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Indexed: 12/22/2022]
Abstract
Species of Amycolatopsis, well recognized as producers of both vancomycin and rifamycin, are also known for producing other secondary metabolites, with wide usage in medicine and agriculture. The molecular genetics of natural antibiotics produced by this genus have been well studied. Since the rise of antibiotic resistance, finding new drugs to fight infection has become an urgent priority. Progress in understanding the biosynthesis of metabolites greatly helps the rational manipulation of biosynthetic pathways, and thus to achieve the goal of generating novel natural antibiotics. The efforts made in exploiting Amycolatopsis genome sequences for the discovery of novel natural products and biosynthetic pathways are summarized.
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Affiliation(s)
- Su Chen
- College of Pharmaceutical Science, Zhejiang University of Technology, Chaowang Road No.18, Xiacheng District, Hangzhou, 310014, Zhejiang, China
| | - Qihao Wu
- College of Pharmaceutical Science, Zhejiang University of Technology, Chaowang Road No.18, Xiacheng District, Hangzhou, 310014, Zhejiang, China
| | - Qingqing Shen
- College of Pharmaceutical Science, Zhejiang University of Technology, Chaowang Road No.18, Xiacheng District, Hangzhou, 310014, Zhejiang, China
| | - Hong Wang
- College of Pharmaceutical Science, Zhejiang University of Technology, Chaowang Road No.18, Xiacheng District, Hangzhou, 310014, Zhejiang, China.
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23
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Jarrad A, Karoli T, Blaskovich MAT, Lyras D, Cooper MA. Clostridium difficile drug pipeline: challenges in discovery and development of new agents. J Med Chem 2015; 58:5164-85. [PMID: 25760275 PMCID: PMC4500462 DOI: 10.1021/jm5016846] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Indexed: 12/17/2022]
Abstract
In the past decade Clostridium difficile has become a bacterial pathogen of global significance. Epidemic strains have spread throughout hospitals, while community acquired infections and other sources ensure a constant inoculation of spores into hospitals. In response to the increasing medical burden, a new C. difficile antibiotic, fidaxomicin, was approved in 2011 for the treatment of C. difficile-associated diarrhea. Rudimentary fecal transplants are also being trialed as effective treatments. Despite these advances, therapies that are more effective against C. difficile spores and less damaging to the resident gastrointestinal microbiome and that reduce recurrent disease are still desperately needed. However, bringing a new treatment for C. difficile infection to market involves particular challenges. This review covers the current drug discovery pipeline, including both small molecule and biologic therapies, and highlights the challenges associated with in vitro and in vivo models of C. difficile infection for drug screening and lead optimization.
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Affiliation(s)
- Angie
M. Jarrad
- The
Institute for Molecular Bioscience, University
of Queensland, St. Lucia, Queensland 4072, Australia
| | - Tomislav Karoli
- The
Institute for Molecular Bioscience, University
of Queensland, St. Lucia, Queensland 4072, Australia
| | - Mark A. T. Blaskovich
- The
Institute for Molecular Bioscience, University
of Queensland, St. Lucia, Queensland 4072, Australia
| | - Dena Lyras
- School
of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia
| | - Matthew A. Cooper
- The
Institute for Molecular Bioscience, University
of Queensland, St. Lucia, Queensland 4072, Australia
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24
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Novel developments in the prevention, diagnosis, and treatment of periprosthetic joint infections. J Am Acad Orthop Surg 2015; 23 Suppl:S32-43. [PMID: 25808968 DOI: 10.5435/jaaos-d-14-00455] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Periprosthetic joint infection (PJI) is one of the most challenging complications compromising the outcome of an otherwise successful operation. Considerable efforts have been invested in the recent years to address paradigm shifts in our understanding of the complex microbiological phenomena that contribute to the pathophysiology of PJI, such as microbial adherence, biofilm formation, and resistance to antibiotics. This article is an introduction to some of the recent advancements in the prevention, diagnosis, and treatment of PJI. It describes how industry, academic researchers, and government are increasing collaboration to address PJI through development of novel technologies, therapeutic strategies, and regulatory science that specifically target the unique biofilm-associated aspects of its pathogenesis.
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25
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Feng G, Yuan Y, Fang H, Zhang R, Xing B, Zhang G, Zhang D, Liu B. A light-up probe with aggregation-induced emission characteristics (AIE) for selective imaging, naked-eye detection and photodynamic killing of Gram-positive bacteria. Chem Commun (Camb) 2015; 51:12490-3. [DOI: 10.1039/c5cc03807c] [Citation(s) in RCA: 149] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report a multifunctional light-up probe based on AIEgens for selective recognition, naked-eye identification, and photodynamic killing of Gram-positive bacteria including vancomycin-resistant strains.
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Affiliation(s)
- Guangxue Feng
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore 117576
- Singapore
- Environmental Research Institute
| | - Youyong Yuan
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore 117576
- Singapore
| | - Hu Fang
- Beijing National Laboratory for Molecular Sciences
- Organic Solids Laboratory
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Ruoyu Zhang
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore 117576
- Singapore
| | - Bengang Xing
- Division of Chemistry and Biological Chemistry
- Nanyang Technological University
- Singapore
- Singapore
| | - Guanxin Zhang
- Beijing National Laboratory for Molecular Sciences
- Organic Solids Laboratory
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Deqing Zhang
- Beijing National Laboratory for Molecular Sciences
- Organic Solids Laboratory
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore 117576
- Singapore
- Institute of Materials Research and Engineering
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26
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Affiliation(s)
- Hee-Kyoung Kang
- Department of Biomedical Sciences, Chosun University, Gwangju, Korea
| | - Yoonkyung Park
- Department of Biomedical Sciences, Chosun University, Gwangju, Korea
- Research Center for Proteinaceous Materials, Chosun University, Gwangju, Korea
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27
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Varisco M, Khanna N, Brunetto PS, Fromm KM. New antimicrobial and biocompatible implant coating with synergic silver-vancomycin conjugate action. ChemMedChem 2014; 9:1221-30. [PMID: 24799389 DOI: 10.1002/cmdc.201400072] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Indexed: 12/13/2022]
Abstract
Materials foreign to the body are used ever more frequently, as increasing numbers of patients require implants. As a consequence, the numbers of implant-related infections have grown as well, and with increasing resistance. Treatments often fail; thus, new antibacterial coating strategies are being developed by scientists to avoid, or at least strongly reduce, bacterial adhesion to implant surfaces. In this study, we focused on producing a self-protective coating combining silver(I) ions and a vancomycin-derived molecule, intelligent pyridinate vancomycin (IPV), with a synergetic and effective action against bacteria. These Ag(I) -IPV conjugate-coated surfaces are well characterized and exhibit strong bactericidal activity in vitro against Staphylococci strains. Furthermore, the released quantities of both drugs from the coated surfaces do not affect their biocompatibility and soft tissue integration. These newly developed Ag(I) -IPV conjugate coatings thus represent a possible and efficient protection method against bacterial adhesion and biofilm formation during and after implant surgery.
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Affiliation(s)
- Massimo Varisco
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg (Switzerland)
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28
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Peng Y, Ye X, Li Y, Bu T, Chen X, Bi J, Zhou J, Yao Z. Teicoplanin as an effective alternative to vancomycin for treatment of MRSA infection in Chinese population: a meta-analysis of randomized controlled trials. PLoS One 2013; 8:e79782. [PMID: 24260299 PMCID: PMC3832583 DOI: 10.1371/journal.pone.0079782] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 09/25/2013] [Indexed: 12/01/2022] Open
Abstract
Objective To evaluate whether teicoplanin could be an alternative to vancomycin for treatment of MRSA infection in Chinese population using a meta-analysis in randomized controlled trials. Methods The following databases were searched: Chinese Biomedical Literature database (CBM), Chinese Journal Full-text database (CNKI), Wanfang database, Medline database, Ovid database and Cochrane Library. Articles published from 2002 to 2013 that studied teicoplanin in comparison to vancomycin in the treatment of MRSA infected patients were collected. Overall effects, publishing bias analysis and sensitivity analysis on clinical cure rate, microbiologic eradication rate and adverse events rate were performed by using Review Manager 5.2 and Stata 11.0 softwares. Results Twelve articles met entry criteria. There was no statistically significant difference between the two groups regarding the clinical cure rate (risk ratio [RR], teicoplanin vs vancomycin, 0.94; 95% CI, 0.74∼1.19; P = 0.60), microbiological cure rate (risk ratio [RR], teicoplanin vs vancomycin, 0.99; 95% CI, 0.91∼1.07; P = 0.74) and adverse event rate (risk ratio [RR], teicoplanin vs vancomycin, 0.86; 95% CI, 0.40∼1.84; P = 0.70). Conclusions The meta-analysis results indicate that the two therapies are similar in both efficacy and safety, thus teicoplanin can act as an effective alternative to vancomycin for treating patients infected by MRSA.
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Affiliation(s)
- Yang Peng
- Department of Epidemiology and Health Statistics, Guangdong Key Laboratory of Molecular Epidemiology, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xiaohua Ye
- Department of Epidemiology and Health Statistics, Guangdong Key Laboratory of Molecular Epidemiology, Guangdong Pharmaceutical University, Guangzhou, China
| | - Ying Li
- Department of Epidemiology and Health Statistics, Guangdong Key Laboratory of Molecular Epidemiology, Guangdong Pharmaceutical University, Guangzhou, China
| | - Tao Bu
- Department of Epidemiology and Health Statistics, Guangdong Key Laboratory of Molecular Epidemiology, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xiaofeng Chen
- Department of Epidemiology and Health Statistics, Guangdong Key Laboratory of Molecular Epidemiology, Guangdong Pharmaceutical University, Guangzhou, China
| | - Jiaqi Bi
- Department of Epidemiology and Health Statistics, Guangdong Key Laboratory of Molecular Epidemiology, Guangdong Pharmaceutical University, Guangzhou, China
| | - Junli Zhou
- Department of Epidemiology and Health Statistics, Guangdong Key Laboratory of Molecular Epidemiology, Guangdong Pharmaceutical University, Guangzhou, China
| | - Zhenjiang Yao
- Department of Epidemiology and Health Statistics, Guangdong Key Laboratory of Molecular Epidemiology, Guangdong Pharmaceutical University, Guangzhou, China
- * E-mail:
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29
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Meroterpenes from marine invertebrates: structures, occurrence, and ecological implications. Mar Drugs 2013; 11:1602-43. [PMID: 23685889 PMCID: PMC3707164 DOI: 10.3390/md11051602] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 04/07/2013] [Accepted: 05/07/2013] [Indexed: 11/29/2022] Open
Abstract
Meroterpenes are widely distributed among marine organisms; they are particularly abundant within brown algae, but other important sources include microorganisms and invertebrates. In the present review the structures and bioactivities of meroterpenes from marine invertebrates, mainly sponges and tunicates, are summarized. More than 300 molecules, often complex and with unique skeletons originating from intra- and inter-molecular cyclizations, and/or rearrangements, are illustrated. The reported syntheses are mentioned. The issue of a potential microbial link to their biosynthesis is also shortly outlined.
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30
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Economou NJ, Zentner IJ, Lazo E, Jakoncic J, Stojanoff V, Weeks SD, Grasty KC, Cocklin S, Loll PJ. Structure of the complex between teicoplanin and a bacterial cell-wall peptide: use of a carrier-protein approach. ACTA CRYSTALLOGRAPHICA. SECTION D, BIOLOGICAL CRYSTALLOGRAPHY 2013; 69:520-33. [PMID: 23519660 PMCID: PMC3606034 DOI: 10.1107/s0907444912050469] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 12/11/2012] [Indexed: 11/10/2022]
Abstract
Multidrug-resistant bacterial infections are commonly treated with glycopeptide antibiotics such as teicoplanin. This drug inhibits bacterial cell-wall biosynthesis by binding and sequestering a cell-wall precursor: a D-alanine-containing peptide. A carrier-protein strategy was used to crystallize the complex of teicoplanin and its target peptide by fusing the cell-wall peptide to either MBP or ubiquitin via native chemical ligation and subsequently crystallizing the protein-peptide-antibiotic complex. The 2.05 Å resolution MBP-peptide-teicoplanin structure shows that teicoplanin recognizes its ligand through a combination of five hydrogen bonds and multiple van der Waals interactions. Comparison of this teicoplanin structure with that of unliganded teicoplanin reveals a flexibility in the antibiotic peptide backbone that has significant implications for ligand recognition. Diffraction experiments revealed an X-ray-induced dechlorination of the sixth amino acid of the antibiotic; it is shown that teicoplanin is significantly more radiation-sensitive than other similar antibiotics and that ligand binding increases radiosensitivity. Insights derived from this new teicoplanin structure may contribute to the development of next-generation antibacterials designed to overcome bacterial resistance.
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Affiliation(s)
- Nicoleta J Economou
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA 19102, USA
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31
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Synthesis and study of antibacterial activities of antibacterial glycopeptide antibiotics conjugated with benzoxaboroles. Future Med Chem 2013; 5:641-52. [DOI: 10.4155/fmc.13.16] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Background: The ability of boron-containing compounds to undergo a number of novel binding interactions with drug target functional groups has recently been described. In an extension of this work, we have incorporated a boron-containing scaffold, the benzoxaborole, into several glycopeptides antibiotics. The aim of this work is to exploit the inherent reactivity of boron to gain additional interactions with the bacterial cell wall components to improve binding affinity and to thereby overcome resistance. Results: Three antibacterial glycopeptides (vancomycin, eremomycin and teicoplanin aglycone) have been selected for the construction of a series of 12 new benzoxaborole–glycopeptide conjugates. The hybrid antibiotics, in which the benzoxaborole and glycopeptide moieties were separated by a linker, exhibited excellent antibacterial activity against Gram-positive bacteria, including those with intermediate susceptibility to glycopeptides. Some analogs also demonstrated activity against vancomycin-resistant enterococci. Conclusion: Conjugation of antibiotics with benzoxaborole derivatives provides antibiotics with new and useful properties. Teicoplanin aglycone–benzoxaborole derivatives overcome resistance of Gram-positive bacteria to vancomycin.
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Jia Z, O'Mara ML, Zuegg J, Cooper MA, Mark AE. Vancomycin: ligand recognition, dimerization and super-complex formation. FEBS J 2013; 280:1294-307. [PMID: 23298227 DOI: 10.1111/febs.12121] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 12/19/2012] [Accepted: 12/21/2012] [Indexed: 11/28/2022]
Abstract
The antibiotic vancomycin targets lipid II, blocking cell wall synthesis in Gram-positive bacteria. Despite extensive study, questions remain regarding how it recognizes its primary ligand and what is the most biologically relevant form of vancomycin. In this study, molecular dynamics simulation techniques have been used to examine the process of ligand binding and dimerization of vancomycin. Starting from one or more vancomycin monomers in solution, together with different peptide ligands derived from lipid II, the simulations predict the structures of the ligated monomeric and dimeric complexes to within 0.1 nm rmsd of the structures determined experimentally. The simulations reproduce the conformation transitions observed by NMR and suggest that proposed differences between the crystal structure and the solution structure are an artifact of the way the NMR data has been interpreted in terms of a structural model. The spontaneous formation of both back-to-back and face-to-face dimers was observed in the simulations. This has allowed a detailed analysis of the origin of the cooperatively between ligand binding and dimerization and suggests that the formation of face-to-face dimers could be functionally significant. The work also highlights the possible role of structural water in stabilizing the vancomycin ligand complex and its role in the manifestation of vancomycin resistance.
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Affiliation(s)
- ZhiGuang Jia
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Qld, Australia
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33
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Hickok NJ, Shapiro IM. Immobilized antibiotics to prevent orthopaedic implant infections. Adv Drug Deliv Rev 2012; 64:1165-76. [PMID: 22512927 DOI: 10.1016/j.addr.2012.03.015] [Citation(s) in RCA: 179] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 03/08/2012] [Accepted: 03/20/2012] [Indexed: 12/17/2022]
Abstract
Many surgical procedures require the placement of an inert or tissue-derived implant deep within the body cavity. While the majority of these implants do not become colonized by bacteria, a small percentage develops a biofilm layer that harbors invasive microorganisms. In orthopaedic surgery, unresolved periprosthetic infections can lead to implant loosening, arthrodeses, amputations and sometimes death. The focus of this review is to describe development of an implant in which an antibiotic tethered to the metal surface is used to prevent bacterial colonization and biofilm formation. Building on well-established chemical syntheses, studies show that antibiotics can be linked to titanium through a self-assembled monolayer of siloxy amines. The stable metal-antibiotic construct resists bacterial colonization and biofilm formation while remaining amenable to osteoblastic cell adhesion and maturation. In an animal model, the antibiotic modified implant resists challenges by bacteria that are commonly present in periprosthetic infections. While the long-term efficacy and stability is still to be established, ongoing studies support the view that this novel type of bioactive surface has a real potential to mitigate or prevent the devastating consequences of orthopaedic infection.
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34
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Shapiro IM, Hickok NJ, Parvizi J, Stewart S, Schaer TP. Molecular engineering of an orthopaedic implant: from bench to bedside. Eur Cell Mater 2012; 23:362-70. [PMID: 22623163 PMCID: PMC7092366 DOI: 10.22203/ecm.v023a28] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The use of metallic implants has revolutionised the practice of orthopaedic surgery. While the safety and biocompatibility of these devices are excellent, a small percentage becomes infected. These infections are due to the formation of a biofilm that harbours bacteria encased in a complex extracellular matrix. The matrix serves as a barrier to immune surveillance as well as limiting the biocidal effects of systemic and local antibiotics. The objective of the review is to describe a novel approach to controlling implant infection using an antibiotic that is linked to titanium through a self-assembled monolayer of siloxy amines. We show that the hybrid-engineered surface is stable, biocompatible and resists colonisation by bacterial species most commonly associated with implant-related infections. Studies with rodent bone infection models suggest that the engineered titanium surface prevents bone infection. Results of a very recent investigation utilising a sheep model of infection indicate that the titanium-tethered antibiotic controls infection without compromising bone formation and remodelling. From all of these perspectives, the tethered antibiotic holds promise of providing a novel and practical approach to reducing implant-associated infections.
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Affiliation(s)
- I M Shapiro
- Department of Orthopaedic Surgery, Thomas Jefferson University, Philadelphia, PA, USA.
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35
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Kumar S, Singh P, Kumar S. 1-(2-Naphthalenyl)benzimidazolium based fluorescent probe for acetate ion in 90% aqueous buffer. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.02.084] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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36
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Abstract
Antibiotics are most commonly prescribed drugs in clinical practice. Therapeutic drug monitoring of these medications is typically associated with a select group of antibiotics such as aminoglycosides and vancomycin. Outside this group, other antibiotics such as chloramphenicol and antituberculosis agents may also require monitoring. Due to their wide therapeutic index, other classes of antibiotics such as penicillins, cephalosporin, sulfonamides, quinolones, and macrolides do not generally require routine therapeutic drug monitoring. Determination of serum or plasma concentration of these drugs, however, may be beneficial in those patients with compromised renal function. As can be expected, immunoassays for routine monitoring of aminoglycosides and vancomycin have been developed and are widely commercially available. Tests for other antibiotics, due to their infrequent use and low clinical application, are generally limited to in-house developed methods.
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37
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Godoy-Alcántar C, Yatsimirsky AK. Biological Small Molecules as Receptors. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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38
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Economou NJ, Nahoum V, Weeks SD, Grasty KC, Zentner IJ, Townsend TM, Bhuiya MW, Cocklin S, Loll PJ. A carrier protein strategy yields the structure of dalbavancin. J Am Chem Soc 2012; 134:4637-45. [PMID: 22352468 DOI: 10.1021/ja208755j] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Many large natural product antibiotics act by specifically binding and sequestering target molecules found on bacterial cells. We have developed a new strategy to expedite the structural analysis of such antibiotic-target complexes, in which we covalently link the target molecules to carrier proteins, and then crystallize the entire carrier-target-antibiotic complex. Using native chemical ligation, we have linked the Lys-D-Ala-D-Ala binding epitope for glycopeptide antibiotics to three different carrier proteins. We show that recognition of this peptide by multiple antibiotics is not compromised by the presence of the carrier protein partner, and use this approach to determine the first-ever crystal structure for the new therapeutic dalbavancin. We also report the first crystal structure of an asymmetric ristocetin antibiotic dimer, as well as the structure of vancomycin bound to a carrier-target fusion. The dalbavancin structure reveals an antibiotic molecule that has closed around its binding partner; it also suggests mechanisms by which the drug can enhance its half-life by binding to serum proteins, and be targeted to bacterial membranes. Notably, the carrier protein approach is not limited to peptide ligands such as Lys-D-Ala-D-Ala, but is applicable to a diverse range of targets. This strategy is likely to yield structural insights that accelerate new therapeutic development.
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Affiliation(s)
- Nicoleta J Economou
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, Pennsylvania 19102, United States
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39
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A novel membrane protein, VanJ, conferring resistance to teicoplanin. Antimicrob Agents Chemother 2012; 56:1784-96. [PMID: 22232274 DOI: 10.1128/aac.05869-11] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Bacterial resistance to the glycopeptide antibiotic teicoplanin shows some important differences from the closely related compound vancomycin. They are currently poorly understood but may reflect significant differences in the mode of action of each antibiotic. Streptomyces coelicolor possesses a vanRSJKHAX gene cluster that when expressed confers resistance to both vancomycin and teicoplanin. The resistance to vancomycin is mediated by the enzymes encoded by vanKHAX, but not by vanJ. vanHAX effect a reprogramming of peptidoglycan biosynthesis, which is considered to be generic, conferring resistance to all glycopeptide antibiotics. Here, we show that vanKHAX are not in fact required for teicoplanin resistance in S. coelicolor, which instead is mediated solely by vanJ. vanJ is shown to encode a membrane protein oriented with its C-terminal active site exposed to the extracytoplasmic space. VanJ also confers resistance to the teicoplanin-like antibiotics ristocetin and A47934 and to a broad range of semisynthetic teicoplanin derivatives, but not generally to antibiotics or semisynthetic derivatives with vancomycin-like structures. vanJ homologues are found ubiquitously in streptomycetes and include staP from the Streptomyces toyocaensis A47934 biosynthetic gene cluster. While overexpression of staP also conferred resistance to teicoplanin, similar expression of other vanJ homologues (SCO2255, SCO7017, and SAV5946) did not. The vanJ and staP orthologues, therefore, appear to represent a subset of a larger protein family whose members have acquired specialist roles in antibiotic resistance. Future characterization of the divergent enzymatic activity within this new family will contribute to defining the molecular mechanisms important for teicoplanin activity and resistance.
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40
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Jia Z, O'Mara M, Zuegg J, Cooper M, Mark A. The effect of environment on the recognition and binding of vancomycin to native and resistant forms of lipid II. Biophys J 2011; 101:2684-92. [PMID: 22261057 PMCID: PMC3297793 DOI: 10.1016/j.bpj.2011.10.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 09/10/2011] [Accepted: 10/31/2011] [Indexed: 10/14/2022] Open
Abstract
Molecular dynamics simulations and free energy calculations have been used to examine in detail the mechanism by which a receptor molecule (the glycopeptide antibiotic vancomycin) recognizes and binds to a target molecule (lipid II) embedded within a membrane environment. The simulations show that the direct interaction of vancomycin with lipid II, as opposed to initial binding to the membrane, leads most readily to the formation of a stable complex. The recognition of lipid II by vancomycin occurred via the N-terminal amine group of vancomycin and the C-terminal carboxyl group of lipid II. Despite lying at the membrane-water interface, the interaction of vancomycin with lipid II was found to be essentially identical to that of soluble tripeptide analogs of lipid II (Ac-d-Ala-d-Ala; root mean-square deviation 0.11 nm). Free energy calculations also suggest that the relative binding affinity of vancomycin for native, resistant, and synthetic forms of membrane-bound lipid II was unaffected by the membrane environment. The effect of the dimerization of vancomycin on the binding of lipid II, the position of lipid II within a biological membrane, and the effect of the isoamylene tail of lipid II on membrane fluidity have also been examined.
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Affiliation(s)
- ZhiGuang Jia
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
| | - Megan L. O'Mara
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
| | - Johannes Zuegg
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, Australia
| | - Matthew A. Cooper
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, Australia
| | - Alan E. Mark
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland, Australia
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, Australia
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41
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Jourdan E, Haroun M, Slama I, Ravel A, Grosset C, Villet A, Peyrin E. Use of an Amino Stationary Phase to Study the Vancomycin Dimerization Dependence on Solute Enantioselectivity. J LIQ CHROMATOGR R T 2011. [DOI: 10.1081/jlc-120020090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Eric Jourdan
- a Equipe de Chimie Analytique, Département de Pharmacochimie Moléculaire , UFR de Pharmacie de Grenoble, Domaine de la Merci , UMR CNR12S‐UFJ 5063, La Tronche , 38700 , France
| | - Mohamed Haroun
- a Equipe de Chimie Analytique, Département de Pharmacochimie Moléculaire , UFR de Pharmacie de Grenoble, Domaine de la Merci , UMR CNR12S‐UFJ 5063, La Tronche , 38700 , France
| | - Ines Slama
- a Equipe de Chimie Analytique, Département de Pharmacochimie Moléculaire , UFR de Pharmacie de Grenoble, Domaine de la Merci , UMR CNR12S‐UFJ 5063, La Tronche , 38700 , France
| | - Anne Ravel
- a Equipe de Chimie Analytique, Département de Pharmacochimie Moléculaire , UFR de Pharmacie de Grenoble, Domaine de la Merci , UMR CNR12S‐UFJ 5063, La Tronche , 38700 , France
| | - Catherine Grosset
- a Equipe de Chimie Analytique, Département de Pharmacochimie Moléculaire , UFR de Pharmacie de Grenoble, Domaine de la Merci , UMR CNR12S‐UFJ 5063, La Tronche , 38700 , France
| | - Annick Villet
- a Equipe de Chimie Analytique, Département de Pharmacochimie Moléculaire , UFR de Pharmacie de Grenoble, Domaine de la Merci , UMR CNR12S‐UFJ 5063, La Tronche , 38700 , France
| | - Eric Peyrin
- a Equipe de Chimie Analytique, Département de Pharmacochimie Moléculaire , UFR de Pharmacie de Grenoble, Domaine de la Merci , UMR CNR12S‐UFJ 5063, La Tronche , 38700 , France
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42
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Morin A, Kaufmann KW, Fortenberry C, Harp JM, Mizoue LS, Meiler J. Computational design of an endo-1,4-beta-xylanase ligand binding site. Protein Eng Des Sel 2011; 24:503-16. [PMID: 21349882 DOI: 10.1093/protein/gzr006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The field of computational protein design has experienced important recent success. However, the de novo computational design of high-affinity protein-ligand interfaces is still largely an open challenge. Using the Rosetta program, we attempted the in silico design of a high-affinity protein interface to a small peptide ligand. We chose the thermophilic endo-1,4-β-xylanase from Nonomuraea flexuosa as the protein scaffold on which to perform our designs. Over the course of the study, 12 proteins derived from this scaffold were produced and assayed for binding to the target ligand. Unfortunately, none of the designed proteins displayed evidence of high-affinity binding. Structural characterization of four designed proteins revealed that although the predicted structure of the protein model was highly accurate, this structural accuracy did not translate into accurate prediction of binding affinity. Crystallographic analyses indicate that the lack of binding affinity is possibly due to unaccounted for protein dynamics in the 'thumb' region of our design scaffold intrinsic to the family 11 β-xylanase fold. Further computational analysis revealed two specific, single amino acid substitutions responsible for an observed change in backbone conformation, and decreased dynamic stability of the catalytic cleft. These findings offer new insight into the dynamic and structural determinants of the β-xylanase proteins.
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Affiliation(s)
- Andrew Morin
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA
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43
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Xing B, Jiang T, Bi W, Yang Y, Li L, Ma M, Chang CK, Xu B, Yeow EKL. Multifunctional divalent vancomycin: the fluorescent imaging and photodynamic antimicrobial properties for drug resistant bacteria. Chem Commun (Camb) 2011; 47:1601-3. [DOI: 10.1039/c0cc04434b] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Ketonis C, Adams CS, Barr S, Aiyer A, Shapiro IM, Parvizi J, Hickok NJ. Antibiotic modification of native grafts: improving upon nature's scaffolds. Tissue Eng Part A 2010; 16:2041-9. [PMID: 20109017 DOI: 10.1089/ten.tea.2009.0610] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Infection associated with inert implants is complicated by bacterial biofilm formation that renders the infection antibiotic insensitive. The goal of this investigation was to synthesize and characterize a vancomycin (VAN)-modified bone allograft that could render the tissue inhospitable to bacterial colonization and the establishment of infection. We found that the numbers of primary amines, which could serve as anchors for chemical synthesis, increased with limited demineralization. Using these amines, we coupled two linkers and VAN to bone using Fmoc chemistry. By immunohistochemistry, VAN was abundant on the surface of the allograft; based on elution and measurement of bound antibody, this coupling yielded at least approximately 26 ng VAN/mg bone. The coupled VAN appeared to be permanently bound to the allograft, as it showed no elution in a disk diffusion assay, and, importantly, resisted colonization by Staphylococcus aureus challenges. We suggest that this chimeric construct represents a new generation of antibiotic-modified allografts that provide antibacterial properties.
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Affiliation(s)
- Constantinos Ketonis
- Department of Orthopaedic Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
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45
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Affiliation(s)
- Jed F Fisher
- Department of Chemistry and Biochemistry, 423 Nieuwland Science Hall, Notre Dame, Indiana 46556-5670, USA
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46
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Jiang PJ, Patel S, Gbureck U, Caley R, Grover LM. Comparing the efficacy of three bioceramic matrices for the release of vancomycin hydrochloride. J Biomed Mater Res B Appl Biomater 2010; 93:51-8. [PMID: 20024966 DOI: 10.1002/jbm.b.31557] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A number of calcium phosphate materials have been investigated as drug release matrices for the prophylactic treatment of implant-related osteomyelitis. However, some studies have shown the influence of processing on the efficacy of the delivered drug. The objective of this study was to evaluate the influence of pH during processing on the efficacy of vancomycin hydrochloride (VH) against Staphylococcus aureus. VH was loaded into a brushite cement (CaHPO(4).2H(2)O; pH 2.4); a hydroxyapatite cement (Ca(10)(PO(4))(6)OH(2); pH 9.4); and an apatite xerogel (pH 7.4). The pH of the material during processing had a significant influence on the mechanism of release from the cement. VH released from the apatite cement (pH 9.4) was not released in accordance with the Higuchi model. In addition to affecting release, the basic pH was shown to diminish the antibacterial potency of the released VH. Despite exceeding the minimum inhibitory concentration, the eluent from the apatite cement was ineffective against a culture of S. aureus. The findings of this study reinforce the importance of evaluating not only the release of the drug from the material matrix but also the antibacterial potency of the released drug.
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Affiliation(s)
- Peih-Jeng Jiang
- School of Chemical Engineering, University of Birmingham, Birmingham, B15 2TT, UK
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47
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Kövér KE, Szilágyi L, Batta G, Uhrín D, Jiménez-Barbero J. Biomolecular Recognition by Oligosaccharides and Glycopeptides: The NMR Point of View. COMPREHENSIVE NATURAL PRODUCTS II 2010:197-246. [DOI: 10.1016/b978-008045382-8.00193-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
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48
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Lawson MC, Shoemaker R, Hoth KB, Bowman CN, Anseth KS. Polymerizable vancomycin derivatives for bactericidal biomaterial surface modification: structure-function evaluation. Biomacromolecules 2009; 10:2221-34. [PMID: 19606854 PMCID: PMC2936007 DOI: 10.1021/bm900410a] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
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Surface modification of implantable biomaterials with biologically active functionalities, including antimicrobials, has wide potential for addressing implant-related design problems. Here, four polymerizable vancomycin derivatives bearing either acrylamide or poly(ethylene glycol) (PEG)-acrylate were synthesized and then polymerized through a surface-mediated reaction. Functionalization of vancomycin at either the V3 or the X1 position decreased monomeric activity by 6−75-fold depending on the modification site and the nature of the adduct (P < 0.08 for all comparisons). A 5000 Da PEG chain showed an order of magnitude decrease in activity relative to a 3400 Da counterpart. Molecular dynamics computational simulations were used to explore the mechanisms of this decreased activity. Assays were also conducted to demonstrate the utility of a living radical photopolymerization to create functional, polymeric surfaces with these monomers and to demonstrate surface-based activity against Staphylococcus epidermidis. In particular, the vancomycin−PEG-acrylate derivatives demonstrated a 7−8 log reduction in bacterial colony forming units (CFU) with respect to nonfunctionalized control surfaces.
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Affiliation(s)
- McKinley C Lawson
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA
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49
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Soni A, Dwivedi V, Chaudhary M. Efficacy of Vancoplus Against Intra Abdominal Infected Mice: A Novel Fixed Dose Combination of Ceftriaxone Plus Vancomycin. ACTA ACUST UNITED AC 2009. [DOI: 10.3923/jbs.2009.655.661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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50
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Nahoum V, Spector S, Loll PJ. Structure of ristocetin A in complex with a bacterial cell-wall mimetic. ACTA CRYSTALLOGRAPHICA SECTION D: BIOLOGICAL CRYSTALLOGRAPHY 2009; 65:832-8. [PMID: 19622867 DOI: 10.1107/s0907444909018344] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2009] [Accepted: 05/14/2009] [Indexed: 11/10/2022]
Abstract
Antimicrobial drug resistance is a serious public health problem and the development of new antibiotics has become an important priority. Ristocetin A is a class III glycopeptide antibiotic that is used in the diagnosis of von Willebrand disease and which has served as a lead compound for the development of new antimicrobial therapeutics. The 1.0 A resolution crystal structure of the complex between ristocetin A and a bacterial cell-wall peptide has been determined. As is observed for most other glycopeptide antibiotics, it is shown that ristocetin A forms a back-to-back dimer containing concave binding pockets that recognize the cell-wall peptide. A comparison of the structure of ristocetin A with those of class I glycopeptide antibiotics such as vancomycin and balhimycin identifies differences in the details of dimerization and ligand binding. The structure of the ligand-binding site reveals a likely explanation for ristocetin A's unique anticooperativity between dimerization and ligand binding.
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Affiliation(s)
- Virginie Nahoum
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA 19102, USA
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