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Iannetta AA, Hicks LM. Maximizing Depth of PTM Coverage: Generating Robust MS Datasets for Computational Prediction Modeling. Methods Mol Biol 2022; 2499:1-41. [PMID: 35696073 DOI: 10.1007/978-1-0716-2317-6_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Post-translational modifications (PTMs) regulate complex biological processes through the modulation of protein activity, stability, and localization. Insights into the specific modification type and localization within a protein sequence can help ascertain functional significance. Computational models are increasingly demonstrated to offer a low-cost, high-throughput method for comprehensive PTM predictions. Algorithms are optimized using existing experimental PTM data, thus accurate prediction performance relies on the creation of robust datasets. Herein, advancements in mass spectrometry-based proteomics technologies to maximize PTM coverage are reviewed. Further, requisite experimental validation approaches for PTM predictions are explored to ensure that follow-up mechanistic studies are focused on accurate modification sites.
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Affiliation(s)
- Anthony A Iannetta
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Leslie M Hicks
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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2
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Frensch M, Jäger C, Müller PF, Tadić A, Wilhelm I, Wehrum S, Diedrich B, Fischer B, Meléndez AV, Dengjel J, Eibel H, Römer W. Bacterial lectin BambL acts as a B cell superantigen. Cell Mol Life Sci 2021; 78:8165-8186. [PMID: 34731252 PMCID: PMC8629787 DOI: 10.1007/s00018-021-04009-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 10/03/2021] [Accepted: 10/21/2021] [Indexed: 11/29/2022]
Abstract
B cell superantigens crosslink conserved domains of B cell receptors (BCRs) and cause dysregulated, polyclonal B cell activation irrespective of normal BCR-antigen complementarity. The cells typically succumb to activation-induced cell death, which can impede the adaptive immune response and favor infection. In the present study, we demonstrate that the fucose-binding lectin of Burkholderia ambifaria, BambL, bears functional resemblance to B cell superantigens. By engaging surface glycans, the bacterial lectin activated human peripheral blood B cells, which manifested in the surface expression of CD69, CD54 and CD86 but became increasingly cytotoxic at higher concentrations. The effects were sensitive to BCR pathway inhibitors and excess fucose, which corroborates a glycan-driven mode of action. Interactome analyses in a model cell line suggest BambL binds directly to glycans of the BCR and regulatory coreceptors. In vitro, BambL triggered BCR signaling and induced CD19 internalization and degradation. Owing to the lectin's six binding sites, we propose a BCR activation model in which BambL functions as a clustering hub for receptor glycans, modulates normal BCR regulation, and induces cell death through exhaustive activation.
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Affiliation(s)
- Marco Frensch
- Faculty of Biology, University of Freiburg, Freiburg, Germany
- Signaling Research Centers BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
- International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Christina Jäger
- Faculty of Biology, University of Freiburg, Freiburg, Germany
- Signaling Research Centers BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Peter F Müller
- Faculty of Biology, University of Freiburg, Freiburg, Germany
- Signaling Research Centers BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Annamaria Tadić
- Faculty of Biology, University of Freiburg, Freiburg, Germany
- Signaling Research Centers BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Isabel Wilhelm
- Faculty of Biology, University of Freiburg, Freiburg, Germany
- Signaling Research Centers BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
- Spemann Graduate School of Biology and Medicine (SGBM), University of Freiburg, Freiburg, Germany
| | - Sarah Wehrum
- Faculty of Biology, University of Freiburg, Freiburg, Germany
- Signaling Research Centers BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Britta Diedrich
- Department of Biology, University of Fribourg, Fribourg, Switzerland
- Department of Dermatology, University Medical Center and University of Freiburg, Freiburg, Germany
| | - Beate Fischer
- Center for Chronic Immunodeficiency, CCI and University Medical Center Freiburg, Freiburg, Germany
| | - Ana Valeria Meléndez
- Faculty of Biology, University of Freiburg, Freiburg, Germany
- Signaling Research Centers BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
- Spemann Graduate School of Biology and Medicine (SGBM), University of Freiburg, Freiburg, Germany
| | - Joern Dengjel
- Department of Biology, University of Fribourg, Fribourg, Switzerland
- Department of Dermatology, University Medical Center and University of Freiburg, Freiburg, Germany
| | - Hermann Eibel
- Center for Chronic Immunodeficiency, CCI and University Medical Center Freiburg, Freiburg, Germany.
| | - Winfried Römer
- Faculty of Biology, University of Freiburg, Freiburg, Germany.
- Signaling Research Centers BIOSS and CIBSS, University of Freiburg, Freiburg, Germany.
- International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.
- Spemann Graduate School of Biology and Medicine (SGBM), University of Freiburg, Freiburg, Germany.
- Freiburg Institute for Advanced Studies (FRIAS), University of Freiburg, Freiburg, Germany.
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3
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Quirke JCK, Crich D. GH47 and Other Glycoside Hydrolases Catalyze Glycosidic Bond Cleavage with the Assistance of Substrate Super-arming at the Transition State. ACS Catal 2021; 11:10308-10315. [PMID: 34777906 PMCID: PMC8579916 DOI: 10.1021/acscatal.1c02750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Super-armed glycosyl donors, whose substituents are predominantly held in pseudoaxial positions, exhibit strongly increased reactivity in glycosylation through significant stabilization of oxocarbenium-like transition states. Examination of X-ray crystal structures reveals that the GH47 family of glycoside hydrolases have evolved so as to distort their substrates away from the ground state conformation in such a manner as to present multiple C-O bonds in pseudoaxial positions and so benefit from conformational super-arming of their substrates, thereby enhancing catalysis. Through analysis of literature mutagenic studies, we show that a suitably placed aromatic residue in GHs 6 and 47 sterically enforces super-armed conformations on their substrates. GH families 45, 81, and 134 on the other hand impose conformational super-arming on their substrates, by maintaining the more active ring conformation through hydrogen bonding rather than steric interactions. The recognition of substrate super-arming by select GH families provides a further parallel with synthetic carbohydrate chemistry and nature and opens further avenues for the design of improved glycosidase inhibitors.
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Affiliation(s)
- Jonathan C K Quirke
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, GA 30602, USA
- Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, GA 30602, USA
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602, USA
| | - David Crich
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, GA 30602, USA
- Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, GA 30602, USA
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602, USA
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Nance ML, Labonte JW, Adolf-Bryfogle J, Gray JJ. Development and Evaluation of GlycanDock: A Protein-Glycoligand Docking Refinement Algorithm in Rosetta. J Phys Chem B 2021; 125:10.1021/acs.jpcb.1c00910. [PMID: 34133179 PMCID: PMC8742512 DOI: 10.1021/acs.jpcb.1c00910] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Carbohydrate chains are ubiquitous in the complex molecular processes of life. These highly diverse chains are recognized by a variety of protein receptors, enabling glycans to regulate many biological functions. High-resolution structures of protein-glycoligand complexes reveal the atomic details necessary to understand this level of molecular recognition and inform application-focused scientific and engineering pursuits. When experimental challenges hinder high-throughput determination of quality structures, computational tools can, in principle, fill the gap. In this work, we introduce GlycanDock, a residue-centric protein-glycoligand docking refinement algorithm developed within the Rosetta macromolecular modeling and design software suite. We performed a benchmark docking assessment using a set of 109 experimentally determined protein-glycoligand complexes as well as 62 unbound protein structures. The GlycanDock algorithm can sample and discriminate among protein-glycoligand models of native-like structural accuracy with statistical reliability from starting structures of up to 7 Å root-mean-square deviation in the glycoligand ring atoms. We show that GlycanDock-refined models qualitatively replicated the known binding specificity of a bacterial carbohydrate-binding module. Finally, we present a protein-glycoligand docking pipeline for generating putative protein-glycoligand complexes when only the glycoligand sequence and unbound protein structure are known. In combination with other carbohydrate modeling tools, the GlycanDock docking refinement algorithm will accelerate research in the glycosciences.
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Affiliation(s)
- Morgan L. Nance
- Program in Molecular Biophysics, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Jason W. Labonte
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
- Department of Chemistry, Franklin & Marshall College, Lancaster, Pennsylvania 17603, United States
- Department of Chemistry, Gettysburg College, Gettysburg, Pennsylvania 17325, United States
| | - Jared Adolf-Bryfogle
- Protein Design Lab, Institute for Protein Innovation, Boston, Massachusetts 02115, United States
- Division of Hematology/Oncology, Boston Children’s Hospital, Boston, Massachusetts 02115, United States
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Jeffrey J. Gray
- Program in Molecular Biophysics, Johns Hopkins University, Baltimore, Maryland 21218, United States
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
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Proteome-wide prediction of bacterial carbohydrate-binding proteins as a tool for understanding commensal and pathogen colonisation of the vaginal microbiome. NPJ Biofilms Microbiomes 2021; 7:49. [PMID: 34131152 PMCID: PMC8206207 DOI: 10.1038/s41522-021-00220-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 05/20/2021] [Indexed: 12/16/2022] Open
Abstract
Bacteria use carbohydrate-binding proteins (CBPs), such as lectins and carbohydrate-binding modules (CBMs), to anchor to specific sugars on host surfaces. CBPs in the gut microbiome are well studied, but their roles in the vagina microbiome and involvement in sexually transmitted infections, cervical cancer and preterm birth are largely unknown. We established a classification system for lectins and designed Hidden Markov Model (HMM) profiles for data mining of bacterial genomes, resulting in identification of >100,000 predicted bacterial lectins available at unilectin.eu/bacteria. Genome screening of 90 isolates from 21 vaginal bacterial species shows that those associated with infection and inflammation produce a larger CBPs repertoire, thus enabling them to potentially bind a wider array of glycans in the vagina. Both the number of predicted bacterial CBPs and their specificities correlated with pathogenicity. This study provides new insights into potential mechanisms of colonisation by commensals and potential pathogens of the reproductive tract that underpin health and disease states.
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6
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Zhao Y, Yu C, Yu Y, Wei X, Duan X, Dai X, Zhang X. Bioinspired Heteromultivalent Ligand-Decorated Nanotherapeutic for Enhanced Photothermal and Photodynamic Therapy of Antibiotic-Resistant Bacterial Pneumonia. ACS APPLIED MATERIALS & INTERFACES 2019; 11:39648-39661. [PMID: 31591880 DOI: 10.1021/acsami.9b15118] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Pseudomonas aeruginosa can cause a multitude of inflammations in humans. Due to its ability to form biofilm, the bacteria show durable resistance to drugs. Herein, we developed a heteromultivalent ligand-decorated nanotherapeutic inspired by living system for inhibition of antibiotic-resistant bacterial pneumonia. The nanotherapeutic with a heteromultivalent glycomimetic shell can specifically recognize P. aeruginosa to inhibit its biofilm formation and protect native cells from bacterial infection; the rate of biofilm inhibition was up to 85%. The nanotherapeutic with a bioresponsive hydrophobic core can protonate and control drug release in the microenvironment of bacterial infections. By utilizing these properties, the nanotherapeutics can effectively penetrate the internal structure of biofilms to release the drug, dispersing the biofilm by over 80% under laser irradiation. In vivo bioinspired nanotherapeutics have the potential to efficiently inhibit antibiotic-resistant P. aeruginosa-induced pneumonia. Collectively, we expect biomimicking systems to be the next generation of prevention and treatment as integrated antibacterial agents against P. aeruginosa.
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Affiliation(s)
- Yu Zhao
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Cong Yu
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Yunjian Yu
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Xiaosong Wei
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Xiaozhuang Duan
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Xijuan Dai
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Xinge Zhang
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
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7
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Cramer J, Sager CP, Ernst B. Hydroxyl Groups in Synthetic and Natural-Product-Derived Therapeutics: A Perspective on a Common Functional Group. J Med Chem 2019; 62:8915-8930. [DOI: 10.1021/acs.jmedchem.9b00179] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jonathan Cramer
- Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Christoph P. Sager
- Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Beat Ernst
- Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
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8
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Verkhnyatskaya SA, de Vries AH, Douma‐de Vries E, Sneep RJL, Walvoort MTC. Direct and Regioselective Di-α-fucosylation on the Secondary Rim of β-Cyclodextrin. Chemistry 2019; 25:6722-6727. [PMID: 30801812 PMCID: PMC6563713 DOI: 10.1002/chem.201806090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 02/15/2019] [Indexed: 01/01/2023]
Abstract
A straightforward glycosylation method is described to regio- and stereoselectively introduce two α-l-fucose moieties directly to the secondary rim of β-cyclodextrin. Using NMR and MS fragmentation studies, the nonasaccharide structure was determined, which was also visualized using molecular dynamics simulations. The reported glycosylation method proved to be robust on gram-scale, and may be generally applied to directly glycosylate β-cyclodextrins to make well-defined multivalent glycoclusters.
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Affiliation(s)
- Stella A. Verkhnyatskaya
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 79747 AGGroningenThe Netherlands
| | - Alex H. de Vries
- Groningen Biomolecular Sciences and Biotechnology InstituteUniversity of GroningenNijenborgh 79747 AGGroningenThe Netherlands
| | - Elmatine Douma‐de Vries
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 79747 AGGroningenThe Netherlands
| | - Renze J. L. Sneep
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 79747 AGGroningenThe Netherlands
| | - Marthe T. C. Walvoort
- Stratingh Institute for ChemistryUniversity of GroningenNijenborgh 79747 AGGroningenThe Netherlands
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9
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Zhao Y, Guo Q, Dai X, Wei X, Yu Y, Chen X, Li C, Cao Z, Zhang X. A Biomimetic Non-Antibiotic Approach to Eradicate Drug-Resistant Infections. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1806024. [PMID: 30589118 PMCID: PMC6634980 DOI: 10.1002/adma.201806024] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Revised: 11/26/2018] [Indexed: 05/19/2023]
Abstract
The chronic infections by pathogenic Pseudomonas aeruginosa (P. aeruginosa) remain to be properly addressed. In particular, for drug-resistant strains, limited medication is available. An in vivo pneumonia model induced by a clinically isolated aminoglycoside resistant strain of P. aeruginosa is developed. Tobramycin clinically treating P. aeruginosa infections is found to be ineffective to inhibit or eliminate this drug-resistant strain. Here, a newly developed non-antibiotics based nanoformulation plus near-infrared (NIR) photothermal treatment shows a remarkable antibacterial efficacy in treating this drug-resistant pneumonia. The novel formulation contains 50-100 nm long nanorods decorated with two types of glycomimetic polymers to specifically block bacterial LecA and LecB lectins, respectively, which are essential for bacterial biofilm development. Such a 3D display of heteromultivalent glycomimetics on a large scale is inspired by the natural strengthening mechanism for the carbohydrate-lectin interaction that occurs when bacteria initially infects the host. This novel formulation shows the most efficient bacteria inhabitation and killing against P. aeruginosa infection, through lectin blocking and the near-infrared-light-induced photothermal effect of gold nanorods, respectively. Collectively, the novel biomimetic design combined with the photothermal killing capability is expected to be an alternative treatment strategy against the ever-threatening drug-resistant infectious diseases when known antibiotics have failed.
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Affiliation(s)
- Yu Zhao
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Qianqian Guo
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaomei Dai
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaosong Wei
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yunjian Yu
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xuelei Chen
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Chaoxing Li
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhiqiang Cao
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202, USA
| | - Xinge Zhang
- Key Laboratory of Functional Polymer Materials of Ministry Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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Bonsor DA, Sundberg EJ. Roles of Adhesion to Epithelial Cells in Gastric Colonization by Helicobacter pylori. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1149:57-75. [PMID: 31016628 DOI: 10.1007/5584_2019_359] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Helicobacter pylori adherence to host epithelial cells is essential for its survival against the harsh conditions of the stomach and for successful colonization. Adherence of H. pylori is achieved through several related families of outer membrane proteins and proteins of a type IV secretion system (T4SS), which bridge H. pylori to host cells through protein-protein and other protein-ligand interactions. Local environmental conditions such as cell type, available host cell surface proteins and/or ligands, as well as responses by the host immune system force H. pylori to alter expression of these proteins to adapt quickly to the local environment in order to colonize and survive. Some of these host-pathogen interactions appear to function in a "catch-and-release" manner, regulated by reversible binding at varying pH and allowing H. pylori to detach itself from cells or debris sloughed off the gastric epithelial lining in order to return for subsequent productive interactions. Other interactions between bacterial adhesin proteins and host adhesion molecules, however, appear to function as a committed step in certain pathogenic processes, such as translocation of the CagA oncoprotein through the H. pylori T4SS and into host gastric epithelial cells. Understanding these adhesion interactions is critical for devising new therapeutic strategies, as they are responsible for the earliest stage of infection and its maintenance. This review will discuss the expression and regulation of several outer membrane proteins and CagL, how they engage their known host cell protein/ligand targets, and their effects on clinical outcome.
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Affiliation(s)
- Daniel A Bonsor
- Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA
| | - Eric J Sundberg
- Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA. .,Department of Medicine, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA. .,Department of Microbiology and Immunology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA.
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Mousavifar L, Touaibia M, Roy R. Development of Mannopyranoside Therapeutics against Adherent-Invasive Escherichia coli Infections. Acc Chem Res 2018; 51:2937-2948. [PMID: 30289687 DOI: 10.1021/acs.accounts.8b00397] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Preventing bacterial adhesion to host cells is a provocative and alternative approach to traditional antibiotic treatments given the increasing microbial resistance. A brief overview of common antibiotic treatments is described in light of their respective resistance and remaining susceptibility. This strategy has been seriously considered in the context of adherent-invasive infections in Crohn's disease and urinary tract infections in particular. The adhesions of various pathogenic Escherichia coli strains to host cells are primarily mediated through carbohydrate-protein interactions involving bacterial organelles called fimbriae that can recognize specific glycoconjugate receptors on host cells. Of particular interest are the FimH and PapG fimbriae, which bind to mannosylated glycoproteins and glycolipids of the galabiose series, respectively. Therefore, blocking FimH- and PapG-mediated bacterial adhesion to uroepithelial cells by high-affinity carbohydrate antagonists constitutes a challenging therapeutic target of high interest. This is of particular interest since bacterial adhesion to host cells is a parameter unlikely to be the subject of bacterial mutations without affecting the carbohydrate ligand binding interactions at the basis of the recognition and infection processes. To date, there have been several families of potent FimH antagonists that include natural O-linked as well as unnatural analogues of α-d-mannopyranosides. These observations led to a thorough understanding of the intimate binding site interactions that helped to reveal the so-called "tyrosine gate mechanism" at the origin of the strong necessary interactions with sugar-possessing hydrophobic aglycones. By modification of the aglycones of single monosaccharidic d-mannopyranosides, it was possible to replace the natural complex oligomannoside structure by simpler ones. An appealing and successful series of analogues have been disclosed, including nanomolecular architectures such as dendrimers, polymers, and liposomes. In addition, the data were compared to the above multivalent architectures and confirmed the possibility of working with small sugar candidates. This Account primarily concentrates on the most promising types of FimH inhibitors belonging to the family of α-C-linked mannopyranosides. However, one of the drawbacks associated with C-mannopyranosides has been that they were believed to be in the inverted chair conformation, which is obviously not recognized by the E. coli FimH. To decipher this situation, various synthetic approaches, conformational aspects, and restrictions are discussed using molecular modeling, high-field NMR spectroscopy, and X-ray analysis. These combined techniques pointed to the fact that several α-C-linked mannopyranosides do exist in the required 4C1 chair conformation. Ultimately, recent findings in this growing field of interest culminated in the identification of drug candidates that have reached clinical phase I.
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Affiliation(s)
- Leila Mousavifar
- Department of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Succ. Centre-Ville, Montréal, Québec H3C 3P8, Canada
- INRS-Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval, Québec H7V 1B7, Canada
| | - Mohamed Touaibia
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, New Brunswick E1A 3E9, Canada
| | - René Roy
- Department of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Succ. Centre-Ville, Montréal, Québec H3C 3P8, Canada
- INRS-Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval, Québec H7V 1B7, Canada
- Glycovax Pharma Inc., 424 Guy, Suite 202, Montréal, Québec H3J 1S6, Canada
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12
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Seidi F, Jenjob R, Phakkeeree T, Crespy D. Saccharides, oligosaccharides, and polysaccharides nanoparticles for biomedical applications. J Control Release 2018; 284:188-212. [DOI: 10.1016/j.jconrel.2018.06.026] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 06/18/2018] [Accepted: 06/20/2018] [Indexed: 12/16/2022]
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13
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Boehm T, Hirano M, Holland SJ, Das S, Schorpp M, Cooper MD. Evolution of Alternative Adaptive Immune Systems in Vertebrates. Annu Rev Immunol 2017; 36:19-42. [PMID: 29144837 DOI: 10.1146/annurev-immunol-042617-053028] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Adaptive immunity in jawless fishes is based on antigen recognition by three types of variable lymphocyte receptors (VLRs) composed of variable leucine-rich repeats, which are differentially expressed by two T-like lymphocyte lineages and one B-like lymphocyte lineage. The T-like cells express either VLRAs or VLRCs of yet undefined antigen specificity, whereas the VLRB antibodies secreted by B-like cells bind proteinaceous and carbohydrate antigens. The incomplete VLR germline genes are assembled into functional units by a gene conversion-like mechanism that employs flanking variable leucine-rich repeat sequences as templates in association with lineage-specific expression of cytidine deaminases. B-like cells develop in the hematopoietic typhlosole and kidneys, whereas T-like cells develop in the thymoid, a thymus-equivalent region at the gill fold tips. Thus, the dichotomy between T-like and B-like cells and the presence of dedicated lymphopoietic tissues emerge as ancestral vertebrate features, whereas the somatic diversification of structurally distinct antigen receptor genes evolved independently in jawless and jawed vertebrates.
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Affiliation(s)
- Thomas Boehm
- Department of Developmental Immunology, Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; , ,
| | - Masayuki Hirano
- Emory Vaccine Center and Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia 30322, USA; , ,
| | - Stephen J Holland
- Department of Developmental Immunology, Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; , ,
| | - Sabyasachi Das
- Emory Vaccine Center and Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia 30322, USA; , ,
| | - Michael Schorpp
- Department of Developmental Immunology, Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; , ,
| | - Max D Cooper
- Emory Vaccine Center and Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia 30322, USA; , ,
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14
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Helicobacter pylori Adapts to Chronic Infection and Gastric Disease via pH-Responsive BabA-Mediated Adherence. Cell Host Microbe 2017; 21:376-389. [PMID: 28279347 DOI: 10.1016/j.chom.2017.02.013] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 12/16/2016] [Accepted: 02/17/2017] [Indexed: 01/22/2023]
Abstract
The BabA adhesin mediates high-affinity binding of Helicobacter pylori to the ABO blood group antigen-glycosylated gastric mucosa. Here we show that BabA is acid responsive-binding is reduced at low pH and restored by acid neutralization. Acid responsiveness differs among strains; often correlates with different intragastric regions and evolves during chronic infection and disease progression; and depends on pH sensor sequences in BabA and on pH reversible formation of high-affinity binding BabA multimers. We propose that BabA's extraordinary reversible acid responsiveness enables tight mucosal bacterial adherence while also allowing an effective escape from epithelial cells and mucus that are shed into the acidic bactericidal lumen and that bio-selection and changes in BabA binding properties through mutation and recombination with babA-related genes are selected by differences among individuals and by changes in gastric acidity over time. These processes generate diverse H. pylori subpopulations, in which BabA's adaptive evolution contributes to H. pylori persistence and overt gastric disease.
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15
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Kirtzel J, Siegel D, Krause K, Kothe E. Stone-Eating Fungi: Mechanisms in Bioweathering and the Potential Role of Laccases in Black Slate Degradation With the Basidiomycete Schizophyllum commune. ADVANCES IN APPLIED MICROBIOLOGY 2017; 99:83-101. [PMID: 28438269 DOI: 10.1016/bs.aambs.2017.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Many enzymes, such as laccases, are involved in the saprotrophic lifestyle of fungi and the effects of those may be linked to enhanced bioweathering on stone surfaces. To test this hypothesis, we studied the decomposition of kerogen-enriched lithologies, especially with black slate containing up to 20% of Corg. Indeed, a formation of ditches with attached hyphal material could be observed. To address enzymes involved, proteomics was performed and one group of enzymes, the multicopper oxidase family members of laccases, was specifically investigated. A role in bioweathering of rocks containing high contents of organic carbon in the form of kerogen could be shown using the basidiomycete Schizophyllum commune, a white rot fungus that has been used as a model organism to study the role of filamentous basidiomycete fungi in bioweathering of black slate.
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Affiliation(s)
| | | | | | - Erika Kothe
- Friedrich Schiller University Jena, Jena, Germany
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16
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Chandran T, Sharma A, Vijayan M. Structural studies on a non-toxic homologue of type II RIPs from bitter gourd: Molecular basis of non-toxicity, conformational selection and glycan structure. J Biosci 2016; 40:929-41. [PMID: 26648038 DOI: 10.1007/s12038-015-9573-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The structures of nine independent crystals of bitter gourd seed lectin (BGSL), a non-toxic homologue of type II RIPs, and its sugar complexes have been determined. The four-chain, two-fold symmetric, protein is made up of two identical two-chain modules, each consisting of a catalytic chain and a lectin chain, connected by a disulphide bridge. The lectin chain is made up of two domains. Each domain carries a carbohydrate binding site in type II RIPs of known structure. BGSL has a sugar binding site only on one domain, thus impairing its interaction at the cell surface. The adenine binding site in the catalytic chain is defective. Thus, defects in sugar binding as well as adenine binding appear to contribute to the non-toxicity of the lectin. The plasticity of the molecule is mainly caused by the presence of two possible well defined conformations of a surface loop in the lectin chain. One of them is chosen in the sugar complexes, in a case of conformational selection, as the chosen conformation facilitates an additional interaction with the sugar, involving an arginyl residue in the loop. The N-glycosylation of the lectin involves a plant-specific glycan while that in toxic type II RIPs of known structure involves a glycan which is animal as well as plant specific.
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17
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Mishra KB, Tiwari VK. One-Pot Facile Synthesis of 1,5-Disubstituted Triazolyl Glycoconjugates from Nitrostyrenes. ChemistrySelect 2016. [DOI: 10.1002/slct.201600994] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kunj B. Mishra
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Vinod K. Tiwari
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
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18
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Nagae M, Kanagawa M, Morita-Matsumoto K, Hanashima S, Kizuka Y, Taniguchi N, Yamaguchi Y. Atomic visualization of a flipped-back conformation of bisected glycans bound to specific lectins. Sci Rep 2016; 6:22973. [PMID: 26971576 PMCID: PMC4789653 DOI: 10.1038/srep22973] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 02/23/2016] [Indexed: 11/09/2022] Open
Abstract
Glycans normally exist as a dynamic equilibrium of several conformations. A fundamental question concerns how such molecules bind lectins despite disadvantageous entropic loss upon binding. Bisected glycan, a glycan possessing bisecting N-acetylglucosamine (GlcNAc), is potentially a good model for investigating conformational dynamics and glycan-lectin interactions, owing to the unique ability of this sugar residue to alter conformer populations and thus modulate the biological activities. Here we analyzed bisected glycan in complex with two unrelated lectins, Calsepa and PHA-E. The crystal structures of the two complexes show a conspicuous flipped back glycan structure (designated 'back-fold' conformation), and solution NMR analysis also provides evidence of 'back-fold' glycan structure. Indeed, statistical conformational analysis of available bisected and non-bisected glycan structures suggests that bisecting GlcNAc restricts the conformations of branched structures. Restriction of glycan flexibility by certain sugar residues may be more common than previously thought and impinges on the mechanism of glycoform-dependent biological functions.
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Affiliation(s)
- Masamichi Nagae
- Structural Glycobiology Team, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mayumi Kanagawa
- Structural Glycobiology Team, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | | | - Shinya Hanashima
- Department of Chemistry, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yasuhiko Kizuka
- Disease Glycomics Team, Systems Glycobiology Research Group, RIKEN-Max Planck Joint Research Center, RIKEN Global Research Cluster, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Naoyuki Taniguchi
- Disease Glycomics Team, Systems Glycobiology Research Group, RIKEN-Max Planck Joint Research Center, RIKEN Global Research Cluster, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yoshiki Yamaguchi
- Structural Glycobiology Team, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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19
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Nunes NNS, Ferreira RS, Silva-Lucca RA, de Sá LFR, de Oliveira AEA, Correia MTDS, Paiva PMG, Wlodawer A, Oliva MLV. Potential of the Lectin/Inhibitor Isolated from Crataeva tapia Bark (CrataBL) for Controlling Callosobruchus maculatus Larva Development. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:10431-6. [PMID: 26568149 PMCID: PMC6290478 DOI: 10.1021/acs.jafc.5b03634] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Callosobruchus maculatus is an important predator of cowpeas. Due to infestation during storage, this insect affects the quality of seed and crop yield. This study aimed to investigate the effects of CrataBL, a multifunction protein isolated from Crataeva tapia bark, on C. maculatus larva development. The protein, which is stable even in extreme pH conditions, showed toxic activity, reducing the larval mass 45 and 70% at concentrations of 0.25 and 1.0% (w/w), respectively. Acting as an inhibitor, CrataBL decreased by 39% the activity of cysteine proteinases from larval gut. Conversely, the activity of serine proteinases was increased about 8-fold. The toxic properties of CrataBL may also be attributed to its capacity of binding to glycoproteins or glycosaminoglycans. Such binding interferes with larval metabolism, because CrataBL-FITC was found in the fat body, Malpighian tubules, and feces of larvae. These results demonstrate the potential of this protein for controlling larva development.
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Affiliation(s)
- Natalia N. S. Nunes
- Departamento de Bioquímica, Universidade Federal de São Paulo-UNIFESP-EPM, 04044-020, São Paulo-SP, Brazil
| | - Rodrigo S. Ferreira
- Departamento de Bioquímica, Universidade Federal de São Paulo-UNIFESP-EPM, 04044-020, São Paulo-SP, Brazil
| | - Rosemeire A. Silva-Lucca
- Centro de Engenharia e Ciências Exatas, Universidade Estadual do Oeste do Paraná, Toledo, Paraná, Brazil
| | - Leonardo F. R. de Sá
- Laboratório de Química e Função de Proteínas e Peptídeos, Centro de Biociências e Biotecnologia-CBB, Universidade Estadual do Norte Fluminense Darcy Ribeiro-UENF, Campos dos Goytacazes- RJ, Brazil
| | - Antônia Elenir A. de Oliveira
- Laboratório de Química e Função de Proteínas e Peptídeos, Centro de Biociências e Biotecnologia-CBB, Universidade Estadual do Norte Fluminense Darcy Ribeiro-UENF, Campos dos Goytacazes- RJ, Brazil
| | | | | | - Alexander Wlodawer
- Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
| | - Maria Luiza V. Oliva
- Departamento de Bioquímica, Universidade Federal de São Paulo-UNIFESP-EPM, 04044-020, São Paulo-SP, Brazil
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20
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Mishra KB, Mishra RC, Tiwari VK. First noscapine glycoconjugates inspired by click chemistry. RSC Adv 2015. [DOI: 10.1039/c5ra07321a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The first click chemistry-inspired noscapine glycoconjugates have been developed in good to excellent yields to increase the therapeutic efficacy of noscapine.
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Affiliation(s)
- Kunj B. Mishra
- Department of Chemistry
- Centre of Advanced Study
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005
| | | | - Vinod K. Tiwari
- Department of Chemistry
- Centre of Advanced Study
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005
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21
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Pérez S, Sarkar A, Rivet A, Breton C, Imberty A. Glyco3D: a portal for structural glycosciences. Methods Mol Biol 2015; 1273:241-258. [PMID: 25753716 DOI: 10.1007/978-1-4939-2343-4_18] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The present work describes, in a detailed way, a family of databases covering the three-dimensional features of monosaccharides, disaccharides, oligosaccharides, polysaccharides, glycosyltransferases, lectins, monoclonal antibodies against carbohydrates, and glycosaminoglycan-binding proteins. These databases have been developed with non-proprietary software, and they are open freely to the scientific community. They are accessible through the common portal called "Glyco3D" http://www.glyco3d.cermav.cnrs.fr. The databases are accompanied by a user-friendly graphical user interface (GUI) which offers several search options. All three-dimensional structures are available for visual consultations (with basic measurements possibilities) and can be downloaded in commonly used formats for further uses.
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Affiliation(s)
- Serge Pérez
- Centre de Recherches sur les Macromolécules Végétales, UPR5301, CNRS - Université Grenoble Alpes, BP53, 38041, Grenoble cédex 09, France
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22
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Mishra KB, Mishra BB, Tiwari VK. Efficient synthesis of ethisterone glycoconjugate via bis-triazole linkage. Carbohydr Res 2014; 399:2-7. [DOI: 10.1016/j.carres.2014.09.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 08/30/2014] [Accepted: 09/05/2014] [Indexed: 11/25/2022]
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23
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Zhang S, Moussodia RO, Sun HJ, Leowanawat P, Muncan A, Nusbaum CD, Chelling KM, Heiney PA, Klein ML, André S, Roy R, Gabius HJ, Percec V. Mimicking Biological Membranes with Programmable Glycan Ligands Self-Assembled from Amphiphilic Janus Glycodendrimers. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403186] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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24
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Zhang S, Moussodia RO, Sun HJ, Leowanawat P, Muncan A, Nusbaum CD, Chelling KM, Heiney PA, Klein ML, André S, Roy R, Gabius HJ, Percec V. Mimicking biological membranes with programmable glycan ligands self-assembled from amphiphilic Janus glycodendrimers. Angew Chem Int Ed Engl 2014; 53:10899-903. [PMID: 24923471 DOI: 10.1002/anie.201403186] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 05/02/2014] [Indexed: 12/16/2022]
Abstract
An accelerated modular synthesis produced 18 amphiphilic Janus glycodendrimers with three different topologies formed from either two or one carbohydrate head groups or a mixed constellation with a noncarbohydrate hydrophilic arm. By simple injection of their THF solutions into water or buffer, all of the Janus compounds self-assembled into uniform, stable, and soft unilamellar vesicles, denoted glycodendrimersomes. The mixed constellation topology glycodendrimersomes were demonstrated to be most efficient in binding plant, bacterial, and human lectins. This evidence with biomedically relevant receptors offers a promising perspective for the application of such glycodendrimersomes in targeted drug delivery, vaccines, and other areas of nanomedicine.
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Affiliation(s)
- Shaodong Zhang
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104-6323 (USA) http://percec02.chem.upenn.edu/
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25
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Fiore M, Berthet N, Marra A, Gillon E, Dumy P, Dondoni A, Imberty A, Renaudet O. Tetravalent glycocyclopeptide with nanomolar affinity to wheat germ agglutinin. Org Biomol Chem 2014; 11:7113-22. [PMID: 24057055 DOI: 10.1039/c3ob41203b] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of tetravalent glycocyclopeptides functionalized with GlcNAc was synthesized using copper(i)-catalysed alkyne-azide cycloaddition, oxime ligation and thiol-ene coupling. The binding ability of these compounds towards wheat germ agglutinin was studied by a competitive ELLA test and ITC experiments. While all compounds were able to inhibit WGA binding to GlcNAc-polymer coated surfaces at low concentrations, derivative 17 having an aliphatic spacer and thioether linkage was 4.9 × 10(6) times more potent on a per sugar basis than GlcNAc. This remarkably strong effect was confirmed by ITC experiments as these revealed an association constant of 9 nM for this compound, therefore presenting a gain of 200,000 times over GlcNAc. These results for compound 17 represent the highest binding properties reported for WGA.
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Affiliation(s)
- Michele Fiore
- Département de Chimie Moléculaire, UMR-CNRS 5250 & ICMG FR 2607, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France.
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26
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Francesconi O, Gentili M, Nativi C, Ardá A, Cañada FJ, Jiménez-Barbero J, Roelens S. Systematic Dissection of an Aminopyrrolic Cage Receptor for β-Glucopyranosides Reveals the Essentials for Effective Recognition. Chemistry 2014; 20:6081-91. [DOI: 10.1002/chem.201400365] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Indexed: 12/17/2022]
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27
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Chen CC, Su WC, Huang BY, Chen YJ, Tai HC, Obena RP. Interaction modes and approaches to glycopeptide and glycoprotein enrichment. Analyst 2014; 139:688-704. [DOI: 10.1039/c3an01813j] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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28
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Alborés S, Mora P, Bustamante MJ, Cerdeiras MP, Franco Fraguas L. Purification and Applications of a Lectin from the Mushroom Gymnopilus spectabilis. Appl Biochem Biotechnol 2013; 172:2081-90. [DOI: 10.1007/s12010-013-0665-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 12/01/2013] [Indexed: 10/25/2022]
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29
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Lu YW, Chien CW, Lin PC, Huang LD, Chen CY, Wu SW, Han CL, Khoo KH, Lin CC, Chen YJ. BAD-lectins: boronic acid-decorated lectins with enhanced binding affinity for the selective enrichment of glycoproteins. Anal Chem 2013; 85:8268-76. [PMID: 23895469 DOI: 10.1021/ac401581u] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The weak and variable binding affinities exhibited by lectin-carbohydrate interactions have often compromised the practical utility of lectin in capturing glycoproteins for glycoproteomic applications. We report here the development and applications of a new type of hybrid biomaterial, namely a boronic acid-decorated lectin (BAD-lectin), for efficient bifunctional glycoprotein labeling and enrichment. Our binding studies showed an enhanced affinity by BAD-lectin, likely to be mediated via the formation of boronate ester linkages between the lectin and glycan subsequent to the initial recognition process and thus preserving its glycan-specificity. Moreover, when attached to magnetic nanoparticles (BAD-lectin@MNPs), 2 to 60-fold improvement on detection sensitivity and enrichment efficiency for specific glycoproteins was observed over the independent use of either lectin or BA. Tested at the level of whole cell lysates for glycoproteomic applications, three different types of BAD-lectin@MNPs exhibited excellent specificities with only 6% overlapping among the 295 N-linked glycopeptides identified. As many as 236 N-linked glycopeptides (80%) were uniquely identified by one of the BAD-lectin@MNPs. These results indicated that the enhanced glycan-selective recognition and binding affinity of BAD-lectin@MNPs will facilitate a complementary identification of the under-explored glycoproteome.
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Affiliation(s)
- Ying-Wei Lu
- Department of Chemistry, National Tsing Hua University, Hsinchu 300-71, Taiwan
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30
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Luo M, Velikovsky CA, Yang X, Siddiqui MA, Hong X, Barchi JJ, Gildersleeve JC, Pancer Z, Mariuzza RA. Recognition of the Thomsen-Friedenreich pancarcinoma carbohydrate antigen by a lamprey variable lymphocyte receptor. J Biol Chem 2013; 288:23597-606. [PMID: 23782692 DOI: 10.1074/jbc.m113.480467] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Variable lymphocyte receptors (VLRs) are leucine-rich repeat proteins that mediate adaptive immunity in jawless vertebrates. VLRs were recently shown to recognize glycans, such as the tumor-associated Thomsen-Friedenreich antigen (TFα; Galβ1-3GalNAcα), with a selectivity rivaling or exceeding that of lectins and antibodies. To understand the basis for TFα recognition by one such VLR (VLRB.aGPA.23), we measured thermodynamic parameters for the binding interaction and determined the structure of the VLRB.aGPA.23-TFα complex to 2.2 Å resolution. In the structure, four tryptophan residues form a tight hydrophobic cage encasing the TFα disaccharide that completely excludes buried water molecules. This cage together with hydrogen bonding of sugar hydroxyls to polar side chains explains the exquisite selectivity of VLRB.aGPA.23. The topology of the glycan-binding site of VLRB.aGPA.23 differs markedly from those of lectins or antibodies, which typically consist of long, convex grooves for accommodating the oligosaccharide. Instead, the TFα disaccharide is sandwiched between a variable loop and the concave surface of the VLR formed by the β-strands of the leucine-rich repeat modules. Longer oligosaccharides are predicted to extend perpendicularly across the β-strands, requiring them to bend to match the concavity of the VLR solenoid.
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Affiliation(s)
- Ming Luo
- University of Maryland Institute for Bioscience and Biotechnology Research, W. M. Keck Laboratory for Structural Biology, Rockville, Maryland 20850, USA
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31
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Audfray A, Varrot A, Imberty A. Bacteria love our sugars: Interaction between soluble lectins and human fucosylated glycans, structures, thermodynamics and design of competing glycocompounds. CR CHIM 2013. [DOI: 10.1016/j.crci.2012.11.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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32
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Ganguly J, Low LY, Kamal N, Saile E, Forsberg LS, Gutierrez-Sanchez G, Hoffmaster AR, Liddington R, Quinn CP, Carlson RW, Kannenberg EL. The secondary cell wall polysaccharide of Bacillus anthracis provides the specific binding ligand for the C-terminal cell wall-binding domain of two phage endolysins, PlyL and PlyG. Glycobiology 2013; 23:820-32. [PMID: 23493680 DOI: 10.1093/glycob/cwt019] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Endolysins are bacteriophage enzymes that lyse their bacterial host for phage progeny release. They commonly contain an N-terminal catalytic domain that hydrolyzes bacterial peptidoglycan (PG) and a C-terminal cell wall-binding domain (CBD) that confers enzyme localization to the PG substrate. Two endolysins, phage lysin L (PlyL) and phage lysin G (PlyG), are specific for Bacillus anthracis. To date, the cell wall ligands for their C-terminal CBD have not been identified. We recently described structures for a number of secondary cell wall polysaccharides (SCWPs) from B. anthracis and B. cereus strains. They are covalently bound to the PG and are comprised of a -ManNAc-GlcNAc-HexNAc- backbone with various galactosyl or glucosyl substitutions. Surface plasmon resonance (SPR) showed that the endolysins PlyL and PlyG bind to the SCWP from B. anthracis (SCWPBa) with high affinity (i.e. in the μM range with dissociation constants ranging from 0.81 × 10(-6) to 7.51 × 10(-6) M). In addition, the PlyL and PlyG SCWPBa binding sites reside with their C-terminal domains. The dissociation constants for the interactions of these endolysins and their derived C-terminal domains with the SCWPBa were in the range reported for other protein-carbohydrate interactions. Our findings show that the SCWPBa is the ligand that confers PlyL and PlyG lysin binding and localization to the PG. PlyL and PlyG also bound the SCWP from B. cereus G9241 with comparable affinities to SCWPBa. No detectable binding was found to the SCWPs from B. cereus ATCC (American Type Culture Collection) 10987 and ATCC 14579, thus demonstrating specificity of lysin binding to SCWPs.
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Affiliation(s)
- Jhuma Ganguly
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA, USA
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33
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Alborés S, Mora P, Cerdeiras MP, Franco Fraguas L. Screening for lectins from basidiomycetes and isolation of Punctularia atropurpurascens
lectin. J Basic Microbiol 2013; 54:89-96. [DOI: 10.1002/jobm.201200229] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 08/14/2012] [Indexed: 11/07/2022]
Affiliation(s)
- Silvana Alborés
- Cátedra de Microbiología, Departamento de Biociencias, Facultad de Química; UdelaR; Montevideo Uruguay
| | - Paola Mora
- Cátedra de Bioquímica, Departamento de Biociencias, Facultad de Química; UdelaR; Montevideo Uruguay
| | - María Pía Cerdeiras
- Cátedra de Microbiología, Departamento de Biociencias, Facultad de Química; UdelaR; Montevideo Uruguay
| | - Laura Franco Fraguas
- Cátedra de Bioquímica, Departamento de Biociencias, Facultad de Química; UdelaR; Montevideo Uruguay
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34
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Arnaud J, Audfray A, Imberty A. Binding sugars: from natural lectins to synthetic receptors and engineered neolectins. Chem Soc Rev 2013; 42:4798-813. [PMID: 23353569 DOI: 10.1039/c2cs35435g] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The large diversity and complexity of glycan structures together with their crucial role in many biological or pathological processes require the development of new high-throughput techniques for analyses. Lectins are classically used for characterising, imaging or targeting glycoconjugates and, when printed on microarrays, they are very useful tools for profiling glycomes. Development of recombinant lectins gives access to reliable and reproducible material, while engineering of new binding sites on existing scaffolds allows tuning of specificity. From the accumulated knowledge on protein-carbohydrate interactions, it is now possible to use nucleotide and peptide (bio)synthesis for producing new carbohydrate-binding molecules. Such a biomimetic approach can also be addressed by boron chemistry and supra-molecular chemistry for the design of fully artificial glycosensors.
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Affiliation(s)
- Julie Arnaud
- Centre de Recherche sur les Macromolécules Végétales (CERMAV-CNRS), affiliated to Grenoble-Université and ICMG, Grenoble, France
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Richichi B, Imberty A, Gillon E, Bosco R, Sutkeviciute I, Fieschi F, Nativi C. Synthesis of a selective inhibitor of a fucose binding bacterial lectin from Burkholderia ambifaria. Org Biomol Chem 2013; 11:4086-94. [DOI: 10.1039/c3ob40520f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Bovi M, Cenci L, Perduca M, Capaldi S, Carrizo ME, Civiero L, Chiarelli LR, Galliano M, Monaco HL. BEL -trefoil: A novel lectin with antineoplastic properties in king bolete (Boletus edulis) mushrooms. Glycobiology 2012; 23:578-92. [DOI: 10.1093/glycob/cws164] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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37
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Mo KF, Li X, Li H, Low LY, Quinn CP, Boons GJ. Endolysins of Bacillus anthracis bacteriophages recognize unique carbohydrate epitopes of vegetative cell wall polysaccharides with high affinity and selectivity. J Am Chem Soc 2012; 134:15556-62. [PMID: 22935003 PMCID: PMC3489029 DOI: 10.1021/ja3069962] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Bacteriophages express endolysins which are the enzymes that hydrolyze peptidoglycan resulting in cell lysis and release of bacteriophages. Endolysins have acquired stringent substrate specificities, which have been attributed to cell wall binding domains (CBD). Although it has been realized that CBDs of bacteriophages that infect Gram-positive bacteria target cell wall carbohydrate structures, molecular mechanisms that confer selectivity are not understood. A range of oligosaccharides, derived from the secondary cell wall polysaccharides of Bacillus anthracis, has been chemically synthesized. The compounds contain an α-d-GlcNAc-(1→4)-β-d-ManNAc-(1→4)-β-d-GlcNAc backbone that is modified by various patterns of α-d-Gal and β-d-Gal branching points. The library of compounds could readily be prepared by employing a core trisaccharide modified by the orthogonal protecting groups N(α)-9-fluorenylmethyloxycarbonate (Fmoc), 2-methylnaphthyl ether (Nap), levulinoyl ester (Lev) and dimethylthexylsilyl ether (TDS) at key branching points. Dissociation constants for the binding the cell wall binding domains of the endolysins PlyL and PlyG were determined by surface plasmon resonance (SPR). It was found that the pattern of galactosylation greatly influenced binding affinities, and in particular a compound having a galactosyl moiety at C-4 of the nonreducing GlcNAc moiety bound in the low micromolar range. It is known that secondary cell wall polysaccharides of various bacilli may have both common and variable structural features and in particular differences in the pattern of galactosylation have been noted. Therefore, it is proposed that specificity of endolysins for specific bacilli is achieved by selective binding to a uniquely galactosylated core structure.
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Affiliation(s)
- Kai-For Mo
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, USA
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Nilsson J, Halim A, Grahn A, Larson G. Targeting the glycoproteome. Glycoconj J 2012; 30:119-36. [PMID: 22886069 PMCID: PMC3552370 DOI: 10.1007/s10719-012-9438-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 07/06/2012] [Accepted: 07/26/2012] [Indexed: 12/12/2022]
Abstract
Despite numerous original publications describing the structural complexity of N- and O-linked glycans on glycoproteins, only very few answer the basic question of which particular glycans are linked to which amino acid residues along the polypeptide chain. Such structural information is of fundamental importance for understanding the biological roles of complex glycosylations as well as deciphering their non-template driven biosynthesis. This review focuses on presenting and commenting on recent strategies, specifically aimed at identifying the glycoproteome of cultured cells and biological samples, using targeted and global enrichment procedures and utilizing the high resolution power, high through-put capacity and complementary fragmentation techniques of tandem mass spectrometry. The goal is to give an update of this emerging field of protein and glyco-sciences and suggest routes to bridge the data gap between the two aspects of glycoprotein characteristics, i.e. glycan structures and their attachment sites.
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Affiliation(s)
- Jonas Nilsson
- Department of Clinical Chemistry and Transfusion Medicine, Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg, Sahlgrenska University Hospital, Gothenburg 413 45, Sweden
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Schubert M, Bleuler-Martinez S, Butschi A, Wälti MA, Egloff P, Stutz K, Yan S, Wilson IBH, Hengartner MO, Aebi M, Allain FHT, Künzler M. Plasticity of the β-trefoil protein fold in the recognition and control of invertebrate predators and parasites by a fungal defence system. PLoS Pathog 2012; 8:e1002706. [PMID: 22615566 PMCID: PMC3355094 DOI: 10.1371/journal.ppat.1002706] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 04/02/2012] [Indexed: 11/29/2022] Open
Abstract
Discrimination between self and non-self is a prerequisite for any defence mechanism; in innate defence, this discrimination is often mediated by lectins recognizing non-self carbohydrate structures and so relies on an arsenal of host lectins with different specificities towards target organism carbohydrate structures. Recently, cytoplasmic lectins isolated from fungal fruiting bodies have been shown to play a role in the defence of multicellular fungi against predators and parasites. Here, we present a novel fruiting body lectin, CCL2, from the ink cap mushroom Coprinopsis cinerea. We demonstrate the toxicity of the lectin towards Caenorhabditis elegans and Drosophila melanogaster and present its NMR solution structure in complex with the trisaccharide, GlcNAcβ1,4[Fucα1,3]GlcNAc, to which it binds with high specificity and affinity in vitro. The structure reveals that the monomeric CCL2 adopts a β-trefoil fold and recognizes the trisaccharide by a single, topologically novel carbohydrate-binding site. Site-directed mutagenesis of CCL2 and identification of C. elegans mutants resistant to this lectin show that its nematotoxicity is mediated by binding to α1,3-fucosylated N-glycan core structures of nematode glycoproteins; feeding with fluorescently labeled CCL2 demonstrates that these target glycoproteins localize to the C. elegans intestine. Since the identified glycoepitope is characteristic for invertebrates but absent from fungi, our data show that the defence function of fruiting body lectins is based on the specific recognition of non-self carbohydrate structures. The trisaccharide specifically recognized by CCL2 is a key carbohydrate determinant of pollen and insect venom allergens implying this particular glycoepitope is targeted by both fungal defence and mammalian immune systems. In summary, our results demonstrate how the plasticity of a common protein fold can contribute to the recognition and control of antagonists by an innate defence mechanism, whereby the monovalency of the lectin for its ligand implies a novel mechanism of lectin-mediated toxicity.
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Affiliation(s)
- Mario Schubert
- Institute of Molecular Biology and Biophysics, ETH Zürich, Zürich, Switzerland
| | | | - Alex Butschi
- Institute of Molecular Life Sciences, University of Zürich, Switzerland
| | | | - Pascal Egloff
- Institute of Microbiology, ETH Zürich, Zürich, Switzerland
| | - Katrin Stutz
- Institute of Molecular Life Sciences, University of Zürich, Switzerland
| | - Shi Yan
- Department of Chemistry, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Iain B. H. Wilson
- Department of Chemistry, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | | | - Markus Aebi
- Institute of Microbiology, ETH Zürich, Zürich, Switzerland
| | | | - Markus Künzler
- Institute of Microbiology, ETH Zürich, Zürich, Switzerland
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40
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Neto LGDN, Pinto LDS, Bastos RM, Evaristo FFV, de Vasconcelos MA, Carneiro VA, Arruda FVS, Porto ALF, Leal RB, Júnior VADS, Cavada BS, Teixeira EH. Effect of the lectin of Bauhinia variegata and its recombinant isoform on surgically induced skin wounds in a murine model. Molecules 2011; 16:9298-315. [PMID: 22064270 PMCID: PMC6264313 DOI: 10.3390/molecules16119298] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 10/20/2011] [Accepted: 10/27/2011] [Indexed: 11/16/2022] Open
Abstract
Lectins are a structurally heterogeneous group of highly specific carbohydrate-binding proteins. Due to their great biotechnological potential, lectins are widely used in biomedical research. The purpose of the present study was to evaluate the healing potential of the lectin of Bauhinia variegata (nBVL) and its recombinant isoform (rBVL-1). Following surgical creation of dorsal skin wounds, seven groups of mice were submitted to topical treatment for 12 days with lectin, D-galactose, BSA and saline. The animals were anesthetized and euthanized on POD 2, 7 and 12 in order to evaluate the healing potential of each treatment. The parameters considered included wound size, contraction rate, epithelialization rate and histopathological findings. Wound closure was fastest in animals treated with rBVL-1 (POD 7). nBVL was more effective than the controls. All skin layers were reconstructed and keratin deposition increased. Our findings indicate that the lectin of Bauhinia variegata possesses pro-healing properties and may be employed in the treatment of acute skin wounds.
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Affiliation(s)
- Luiz Gonzaga do Nascimento Neto
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
| | - Luciano da Silva Pinto
- Center for Technological Development (CDTec), Unidad of Biotecnology, Federal University of Pelotas, Pelotas, Rio Grande do Sul, 96010-900, Brazil; E-Mail: (L.d.S.P.)
| | - Rafaela Mesquita Bastos
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
| | - Francisco Flávio Vasconcelos Evaristo
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
| | - Mayron Alves de Vasconcelos
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará 60451-970, Brazil; E-Mails: (M.A.V.); (B.S.C.)
| | - Victor Alves Carneiro
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
| | - Francisco Vassiliepe Sousa Arruda
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
| | - Ana Lúcia Figueiredo Porto
- Department of Animal Morphology and Physiology, Federal Rural University of Pernambuco, Recife, Pernambuco 52171-900, Brazil; E-Mails: (A.L.F.P.); (V.A.d.S.J.)
| | - Rodrigo Bainy Leal
- Department of Biochemistry, CBB, Federal University of Santa Catarina, Santa Catarina 88040-970, Brazil; E-Mail: (B.B.L.)
| | - Valdemiro Amaro da Silva Júnior
- Department of Animal Morphology and Physiology, Federal Rural University of Pernambuco, Recife, Pernambuco 52171-900, Brazil; E-Mails: (A.L.F.P.); (V.A.d.S.J.)
| | - Benildo Sousa Cavada
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará 60451-970, Brazil; E-Mails: (M.A.V.); (B.S.C.)
| | - Edson Holanda Teixeira
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +55-88-3611-8000; Fax: +55-88-3611-2202
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Otsuka I, Blanchard B, Borsali R, Imberty A, Kakuchi T. Enhancement of plant and bacterial lectin binding affinities by three-dimensional organized cluster glycosides constructed on helical poly(phenylacetylene) backbones. Chembiochem 2011; 11:2399-408. [PMID: 21053235 DOI: 10.1002/cbic.201000447] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A series of poly(phenylacetylene)s bearing diverse saccharide pendants--N-acetyl-D-glucosamine, D-lactose, and N-acetyl-D-neuraminic acid--were synthesized by rhodium-mediated polymerizations of the corresponding acetyl-protected glycosylated phenylacetylenes followed by deprotection. The circular dichroism spectra of these glycosylated poly(phenylacetylene)s each displayed split-type Cotton effects in the long absorption region of the conjugated polymer backbone (260-500 nm), thus indicating predominantly one-handed helical conformations in their backbones. The binding affinities of these glycosylated poly(phenylacetylene)s, and those of previously reported phenylacetylenes bearing D-galactose, towards plant and bacterial lectins were investigated by hemagglutination inhibition assay and isothermal titration calorimetry (ITC). The stoichiometries of binding vary strongly, depending on the lectin binding sites and the accessibilities of the carbohydrate residues in the helices. The measured affinities also vary, with the maximum value observed for the interaction between poly-PA-α-Gal and lectin I from Pseudomonas aeruginosa, with a K(d) value of 4 μM per monosaccharide representing a 200-fold increase relative to the corresponding monomer.
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Affiliation(s)
- Issei Otsuka
- Centre de Recherche sur les Macromolécules Végétales (CERMAV, UPR-CNRS 5301), Université Joseph Fourier, 38041 Grenoble Cedex 9, France
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42
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Bleuler-Martínez S, Butschi A, Garbani M, Wälti MA, Wohlschlager T, Potthoff E, Sabotiĉ J, Pohleven J, Lüthy P, Hengartner MO, Aebi M, Künzler M. A lectin-mediated resistance of higher fungi against predators and parasites. Mol Ecol 2011; 20:3056-70. [PMID: 21486374 DOI: 10.1111/j.1365-294x.2011.05093.x] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Fruiting body lectins are ubiquitous in higher fungi and characterized by being synthesized in the cytoplasm and up-regulated during sexual development. The function of these lectins is unclear. A lack of phenotype in sexual development upon inactivation of the respective genes argues against a function in this process. We tested a series of characterized fruiting body lectins from different fungi for toxicity towards the nematode Caenorhabditis elegans, the mosquito Aedes aegypti and the amoeba Acanthamoeba castellanii. Most of the fungal lectins were found to be toxic towards at least one of the three target organisms. By altering either the fungal lectin or the glycans of the target organisms, or by including soluble carbohydrate ligands as competitors, we demonstrate that the observed toxicity is dependent on the interaction between the fungal lectins and specific glycans in the target organisms. The toxicity was found to be dose-dependent such that low levels of lectin were no longer toxic but still led to food avoidance by C. elegans. Finally, we show, in an ecologically more relevant scenario, that challenging the vegetative mycelium of Coprinopsis cinerea with the fungal-feeding nematode Aphelenchus avenae induces the expression of the nematotoxic fruiting body lectins CGL1 and CGL2. Based on these findings, we propose that filamentous fungi possess an inducible resistance against predators and parasites mediated by lectins that are specific for glycans of these antagonists.
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Affiliation(s)
- S Bleuler-Martínez
- Institute of Microbiology, Department of Biology, Eidgenössische Technische Hochschule (ETH) Zürich, CH-8093, Zürich, Switzerland
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X-ray structural studies of the entire extracellular region of the serine/threonine kinase PrkC from Staphylococcus aureus. Biochem J 2011; 435:33-41. [DOI: 10.1042/bj20101643] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Bacterial serine/threonine kinases modulate a wide number of cellular processes. The serine/threonine kinase PrkC from the human pathogen Staphylococcus aureus was also shown to induce germination of Bacillus subtilis spores, in response to cell wall muropeptides. The presence of muropeptides in the bacterial extracellular milieu is a strong signal that the growing conditions are promising. In the present paper, we report the X-ray structure of the entire extracellular region of PrkC from S. aureus. This structure reveals that the extracellular region of PrkC, EC-PrkC, is a linear modular structure composed of three PASTA (penicillin binding-associated and serine/threonine kinase-associated) domains and an unpredicted C-terminal domain, which presents the typical features of adhesive proteins. Using several solution techniques, we also found that EC-PrkC shows no tendency to dimerize even in the presence of high concentrations of muropeptides. X-ray structural results obtained in the present study provide molecular clues into the mechanism of muropeptide-induced PrkC activation.
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44
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Bovi M, Carrizo ME, Capaldi S, Perduca M, Chiarelli LR, Galliano M, Monaco HL. Structure of a lectin with antitumoral properties in king bolete (Boletus edulis) mushrooms. Glycobiology 2011; 21:1000-9. [DOI: 10.1093/glycob/cwr012] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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45
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Glycosylation is required for outer membrane localization of the lectin LecB in Pseudomonas aeruginosa. J Bacteriol 2011; 193:1107-13. [PMID: 21217000 DOI: 10.1128/jb.01507-10] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The fucose-/mannose-specific lectin LecB from Pseudomonas aeruginosa is transported to the outer membrane; however, the mechanism used is not known so far. Here, we report that LecB is present in the periplasm of P. aeruginosa in two variants of different sizes. Both were functional and could be purified by their affinity to mannose. The difference in size was shown by a specific enzyme assay to be a result of N glycosylation, and inactivation of the glycosylation sites was shown by site-directed mutagenesis. Furthermore, we demonstrate that this glycosylation is required for the transport of LecB.
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46
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Gilboa-Garber N, Zinger-Yosovich KD, Sudakevitz D, Lerrer B, Imberty A, Wimmerova M, Wu AM, Garber NC. The five bacterial lectins (PA-IL, PA-IIL, RSL, RS-IIL, and CV-IIL): interactions with diverse animal cells and glycoproteins. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2011; 705:155-211. [PMID: 21618109 DOI: 10.1007/978-1-4419-7877-6_9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Nechama Gilboa-Garber
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel.
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47
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Yang LY, Kawada Y, Bai L, Kubota D, Yuasa H. 2-Oxabutane as a substitute for internal monomer units of oligosaccharides to create lectin ligands. Org Biomol Chem 2011; 9:6579-86. [DOI: 10.1039/c1ob05775h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Li-Ying Yang
- Department of Life Science, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, J2-10, 4259 Nagatsutacho, Midoriku, Yokohama 226-8501, Japan
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Olausson J, Åström E, Jonsson BH, Tibell LAE, Påhlsson P. Production and characterization of a monomeric form and a single-site form of Aleuria aurantia lectin. Glycobiology 2010; 21:34-44. [DOI: 10.1093/glycob/cwq129] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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49
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Faivre V, Rosilio V. Interest of glycolipids in drug delivery: from physicochemical properties to drug targeting. Expert Opin Drug Deliv 2010; 7:1031-48. [DOI: 10.1517/17425247.2010.511172] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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50
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Sulzenbacher G, Roig-Zamboni V, Peumans WJ, Rougé P, Van Damme EJ, Bourne Y. Crystal structure of the GalNAc/Gal-specific agglutinin from the phytopathogenic ascomycete Sclerotinia sclerotiorum reveals novel adaptation of a beta-trefoil domain. J Mol Biol 2010; 400:715-23. [PMID: 20566411 PMCID: PMC2956877 DOI: 10.1016/j.jmb.2010.05.038] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Accepted: 05/12/2010] [Indexed: 10/19/2022]
Abstract
A lectin from the phytopathogenic ascomycete Sclerotinia sclerotiorum that shares only weak sequence similarity with characterized fungal lectins has recently been identified. S. sclerotiorum agglutinin (SSA) is a homodimeric protein consisting of two identical subunits of approximately 17 kDa and displays specificity primarily towards Gal/GalNAc. Glycan array screening indicates that SSA readily interacts with Gal/GalNAc-bearing glycan chains. The crystal structures of SSA in the ligand-free form and in complex with the Gal-beta1,3-GalNAc (T-antigen) disaccharide have been determined at 1.6 and 1.97 A resolution, respectively. SSA adopts a beta-trefoil domain as previously identified for other carbohydrate-binding proteins of the ricin B-like lectin superfamily and accommodates terminal non-reducing galactosyl and N-acetylgalactosaminyl glycans. Unlike other structurally related lectins, SSA contains a single carbohydrate-binding site at site alpha. SSA reveals a novel dimeric assembly markedly dissimilar to those described earlier for ricin-type lectins. The present structure exemplifies the adaptability of the beta-trefoil domain in the evolution of fungal lectins.
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Affiliation(s)
- Gerlind Sulzenbacher
- Architecture et Fonction des Macromolécules Biologiques (AFMB, UMR-6098) CNRS, Université Aix-Marseille, Campus Luminy, Case 932, F-13288 Marseille cedex 09, France
| | - Véronique Roig-Zamboni
- Architecture et Fonction des Macromolécules Biologiques (AFMB, UMR-6098) CNRS, Université Aix-Marseille, Campus Luminy, Case 932, F-13288 Marseille cedex 09, France
| | - Willy J. Peumans
- Laboratory of Biochemistry and Glycobiology, Department of Molecular Biotechnology, Ghent University, Coupure Links 653, Ghent, Belgium
| | - Pierre Rougé
- Surfaces Cellulaires et Signalisation chez les Végétaux, UMR-CNRS 5546, Pôle de Biotechnologie Végétale, Toulouse, France
| | - Els J.M. Van Damme
- Laboratory of Biochemistry and Glycobiology, Department of Molecular Biotechnology, Ghent University, Coupure Links 653, Ghent, Belgium
| | - Yves Bourne
- Architecture et Fonction des Macromolécules Biologiques (AFMB, UMR-6098) CNRS, Université Aix-Marseille, Campus Luminy, Case 932, F-13288 Marseille cedex 09, France
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