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Mangano K, Klepacki D, Ohanmu I, Baliga C, Huang W, Brakel A, Krizsan A, Polikanov YS, Hoffmann R, Vázquez-Laslop N, Mankin AS. Inhibition of translation termination by the antimicrobial peptide Drosocin. Nat Chem Biol 2023; 19:1082-1090. [PMID: 36997647 PMCID: PMC10757563 DOI: 10.1038/s41589-023-01300-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 02/24/2023] [Indexed: 04/01/2023]
Abstract
The proline-rich antimicrobial peptide (PrAMP) Drosocin (Dro) from fruit flies shows sequence similarity to other PrAMPs that bind to the ribosome and inhibit protein synthesis by varying mechanisms. The target and mechanism of action of Dro, however, remain unknown. Here we show that Dro arrests ribosomes at stop codons, probably sequestering class 1 release factors associated with the ribosome. This mode of action is comparable to that of apidaecin (Api) from honeybees, making Dro the second member of the type II PrAMP class. Nonetheless, analysis of a comprehensive library of endogenously expressed Dro mutants shows that the interactions of Dro and Api with the target are markedly distinct. While only a few C-terminal amino acids of Api are critical for binding, the interaction of Dro with the ribosome relies on multiple amino acid residues distributed throughout the PrAMP. Single-residue substitutions can substantially enhance the on-target activity of Dro.
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Affiliation(s)
- Kyle Mangano
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Dorota Klepacki
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Irueosa Ohanmu
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Chetana Baliga
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Weiping Huang
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Alexandra Brakel
- Faculty of Chemistry and Mineralogy, Institute of Bioanalytical Chemistry, Leipzig University, Leipzig, Germany
- Center for Biotechnology and Biomedicine (BBZ), Leipzig University, Leipzig, Germany
| | - Andor Krizsan
- Faculty of Chemistry and Mineralogy, Institute of Bioanalytical Chemistry, Leipzig University, Leipzig, Germany
- Center for Biotechnology and Biomedicine (BBZ), Leipzig University, Leipzig, Germany
| | - Yury S Polikanov
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA
- Department of Biological Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Ralf Hoffmann
- Faculty of Chemistry and Mineralogy, Institute of Bioanalytical Chemistry, Leipzig University, Leipzig, Germany.
- Center for Biotechnology and Biomedicine (BBZ), Leipzig University, Leipzig, Germany.
| | - Nora Vázquez-Laslop
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA.
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA.
| | - Alexander S Mankin
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL, USA.
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA.
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2
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Koller TO, Morici M, Berger M, Safdari HA, Lele DS, Beckert B, Kaur KJ, Wilson DN. Structural basis for translation inhibition by the glycosylated drosocin peptide. Nat Chem Biol 2023; 19:1072-1081. [PMID: 36997646 PMCID: PMC10449632 DOI: 10.1038/s41589-023-01293-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 02/14/2023] [Indexed: 04/07/2023]
Abstract
The proline-rich antimicrobial peptide (PrAMP) drosocin is produced by Drosophila species to combat bacterial infection. Unlike many PrAMPs, drosocin is O-glycosylated at threonine 11, a post-translation modification that enhances its antimicrobial activity. Here we demonstrate that the O-glycosylation not only influences cellular uptake of the peptide but also interacts with its intracellular target, the ribosome. Cryogenic electron microscopy structures of glycosylated drosocin on the ribosome at 2.0-2.8-Å resolution reveal that the peptide interferes with translation termination by binding within the polypeptide exit tunnel and trapping RF1 on the ribosome, reminiscent of that reported for the PrAMP apidaecin. The glycosylation of drosocin enables multiple interactions with U2609 of the 23S rRNA, leading to conformational changes that break the canonical base pair with A752. Collectively, our study reveals novel molecular insights into the interaction of O-glycosylated drosocin with the ribosome, which provide a structural basis for future development of this class of antimicrobials.
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Affiliation(s)
- Timm O Koller
- Institute for Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany
| | - Martino Morici
- Institute for Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany
| | - Max Berger
- Institute for Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany
| | - Haaris A Safdari
- Institute for Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany
| | - Deepti S Lele
- National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India
| | - Bertrand Beckert
- Dubochet Center for Imaging (DCI) at EPFL, EPFL SB IPHYS DCI, Lausanne, Switzerland
| | - Kanwal J Kaur
- National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India
| | - Daniel N Wilson
- Institute for Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany.
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Li W, Separovic F, O'Brien-Simpson NM, Wade JD. Chemically modified and conjugated antimicrobial peptides against superbugs. Chem Soc Rev 2021; 50:4932-4973. [PMID: 33710195 DOI: 10.1039/d0cs01026j] [Citation(s) in RCA: 201] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Antimicrobial resistance (AMR) is one of the greatest threats to human health that, by 2050, will lead to more deaths from bacterial infections than cancer. New antimicrobial agents, both broad-spectrum and selective, that do not induce AMR are urgently required. Antimicrobial peptides (AMPs) are a novel class of alternatives that possess potent activity against a wide range of Gram-negative and positive bacteria with little or no capacity to induce AMR. This has stimulated substantial chemical development of novel peptide-based antibiotics possessing improved therapeutic index. This review summarises recent synthetic efforts and their impact on analogue design as well as their various applications in AMP development. It includes modifications that have been reported to enhance antimicrobial activity including lipidation, glycosylation and multimerization through to the broad application of novel bio-orthogonal chemistry, as well as perspectives on the direction of future research. The subject area is primarily the development of next-generation antimicrobial agents through selective, rational chemical modification of AMPs. The review further serves as a guide toward the most promising directions in this field to stimulate broad scientific attention, and will lead to new, effective and selective solutions for the several biomedical challenges to which antimicrobial peptidomimetics are being applied.
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Affiliation(s)
- Wenyi Li
- Melbourne Dental School, Centre for Oral Health Research, University of Melbourne, VIC 3010, Australia. and Bio21 Institute, University of Melbourne, VIC 3010, Australia
| | - Frances Separovic
- Bio21 Institute, University of Melbourne, VIC 3010, Australia and School of Chemistry, University of Melbourne, VIC 3010, Australia
| | - Neil M O'Brien-Simpson
- Melbourne Dental School, Centre for Oral Health Research, University of Melbourne, VIC 3010, Australia. and Bio21 Institute, University of Melbourne, VIC 3010, Australia
| | - John D Wade
- School of Chemistry, University of Melbourne, VIC 3010, Australia and The Florey Institute of Neuroscience and Mental Health, University of Melbourne, VIC 3010, Australia.
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Sanchez Bosch P, Makhijani K, Herboso L, Gold KS, Baginsky R, Woodcock KJ, Alexander B, Kukar K, Corcoran S, Jacobs T, Ouyang D, Wong C, Ramond EJV, Rhiner C, Moreno E, Lemaitre B, Geissmann F, Brückner K. Adult Drosophila Lack Hematopoiesis but Rely on a Blood Cell Reservoir at the Respiratory Epithelia to Relay Infection Signals to Surrounding Tissues. Dev Cell 2019; 51:787-803.e5. [PMID: 31735669 DOI: 10.1016/j.devcel.2019.10.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 08/08/2019] [Accepted: 10/17/2019] [Indexed: 12/23/2022]
Abstract
The use of adult Drosophila melanogaster as a model for hematopoiesis or organismal immunity has been debated. Addressing this question, we identify an extensive reservoir of blood cells (hemocytes) at the respiratory epithelia (tracheal air sacs) of the thorax and head. Lineage tracing and functional analyses demonstrate that the majority of adult hemocytes are phagocytic macrophages (plasmatocytes) from the embryonic lineage that parallels vertebrate tissue macrophages. Surprisingly, we find no sign of adult hemocyte expansion. Instead, hemocytes play a role in relaying an innate immune response to the blood cell reservoir: through Imd signaling and the Jak/Stat pathway ligand Upd3, hemocytes act as sentinels of bacterial infection, inducing expression of the antimicrobial peptide Drosocin in respiratory epithelia and colocalizing fat body domains. Drosocin expression in turn promotes animal survival after infection. Our work identifies a multi-signal relay of organismal humoral immunity, establishing adult Drosophila as model for inter-organ immunity.
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Affiliation(s)
- Pablo Sanchez Bosch
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Kalpana Makhijani
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Leire Herboso
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Katrina S Gold
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Rowan Baginsky
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | | | - Brandy Alexander
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Katelyn Kukar
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Sean Corcoran
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Thea Jacobs
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Debra Ouyang
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Corinna Wong
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA
| | | | | | | | | | - Frederic Geissmann
- King's College London, London, UK; Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Katja Brückner
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA, USA; Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA, USA; Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, USA.
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2011-2012. MASS SPECTROMETRY REVIEWS 2017; 36:255-422. [PMID: 26270629 DOI: 10.1002/mas.21471] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 01/15/2015] [Indexed: 06/04/2023]
Abstract
This review is the seventh update of the original article published in 1999 on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2012. General aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, and fragmentation are covered in the first part of the review and applications to various structural types constitute the remainder. The main groups of compound are oligo- and poly-saccharides, glycoproteins, glycolipids, glycosides, and biopharmaceuticals. Much of this material is presented in tabular form. Also discussed are medical and industrial applications of the technique, studies of enzyme reactions, and applications to chemical synthesis. © 2015 Wiley Periodicals, Inc. Mass Spec Rev 36:255-422, 2017.
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Affiliation(s)
- David J Harvey
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford, OX1 3QU, UK
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Lepage ML, Meli A, Bodlenner A, Tarnus C, De Riccardis F, Izzo I, Compain P. Synthesis of the first examples of iminosugar clusters based on cyclopeptoid cores. Beilstein J Org Chem 2014; 10:1406-12. [PMID: 24991295 PMCID: PMC4077385 DOI: 10.3762/bjoc.10.144] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 05/20/2014] [Indexed: 12/22/2022] Open
Abstract
Cyclic N-propargyl α-peptoids of various sizes were prepared by way of macrocyclizations of linear N-substituted oligoglycines. These compounds were used as molecular platforms to synthesize a series of iminosugar clusters with different valency and alkyl spacer lengths by means of Cu(I)-catalysed azide-alkyne cycloadditions. Evaluation of these compounds as α-mannosidase inhibitors led to significant multivalent effects and further demonstrated the decisive influence of scaffold rigidity on binding affinity enhancements.
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Affiliation(s)
- Mathieu L Lepage
- Laboratoire de Synthèse Organique et Molécules Bioactives (SYBIO), Université de Strasbourg/CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg, France
| | - Alessandra Meli
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano Salerno, Italy
| | - Anne Bodlenner
- Laboratoire de Synthèse Organique et Molécules Bioactives (SYBIO), Université de Strasbourg/CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg, France
| | - Céline Tarnus
- Université de Haute Alsace, Laboratoire de Chimie Organique et Bioorganique, EA4466, ENSCMu, 3, rue Alfred Werner, 68093 Mulhouse Cedex, France
| | - Francesco De Riccardis
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano Salerno, Italy
| | - Irene Izzo
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano Salerno, Italy
| | - Philippe Compain
- Laboratoire de Synthèse Organique et Molécules Bioactives (SYBIO), Université de Strasbourg/CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg, France ; Institut Universitaire de France, 103 Bd Saint-Michel, 75005 Paris, France
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Ahn M, Murugan RN, Shin SY, Kim HJ, Bang JK. Peptoid-based Positional Scanning Derivatives: Revealing the Optimum Residue Required for Ice Recrystallization Inhibition Activity for Every Position in the AFGPs. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.12.3931] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Ahn M, Murugan RN, Shin SY, Kim E, Lee JH, Kim HJ, Bang JK. Synthesis of Cyclic Antifreeze Glycopeptide and Glycopeptoids and Their Ice Recrystallization Inhibition Activity. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.11.3565] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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