1
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Nagao M, Hoshino Y, Miura Y. Quantification of thermodynamic effects of carbohydrate multivalency on avidity using synthetic discrete glycooligomers. Chem Commun (Camb) 2024. [PMID: 38895769 DOI: 10.1039/d4cc02409e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
A quantitative understanding of thermodynamic effects of avidity in biomolecular interactions is important. Herein, we synthesized discrete glycooligomers and evaluated their interactions with a model protein using isothermal titration calorimetry. The dimeric glycooligomer exhibited higher binding constants compared to the glycomonomer, attributed to the reduced conformational entropy loss through local presentation of multiple carbohydrate units. Conversely, divalent glycoligands with polyethylene glycol linkers, aiming for multivalent binding, showed enhanced interactions through increased enthalpy. These findings emphasize the importance of distinguishing between the "local avidity" and the "multipoint avidity".
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Affiliation(s)
- Masanori Nagao
- Department of Chemical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Yu Hoshino
- Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshiko Miura
- Department of Chemical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
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2
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Hao MS, Mazurkewich S, Li H, Kvammen A, Saha S, Koskela S, Inman AR, Nakajima M, Tanaka N, Nakai H, Brändén G, Bulone V, Larsbrink J, McKee LS. Structural and biochemical analysis of family 92 carbohydrate-binding modules uncovers multivalent binding to β-glucans. Nat Commun 2024; 15:3429. [PMID: 38653764 PMCID: PMC11039641 DOI: 10.1038/s41467-024-47584-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 04/08/2024] [Indexed: 04/25/2024] Open
Abstract
Carbohydrate-binding modules (CBMs) are non-catalytic proteins found appended to carbohydrate-active enzymes. Soil and marine bacteria secrete such enzymes to scavenge nutrition, and they often use CBMs to improve reaction rates and retention of released sugars. Here we present a structural and functional analysis of the recently established CBM family 92. All proteins analysed bind preferentially to β-1,6-glucans. This contrasts with the diversity of predicted substrates among the enzymes attached to CBM92 domains. We present crystal structures for two proteins, and confirm by mutagenesis that tryptophan residues permit ligand binding at three distinct functional binding sites on each protein. Multivalent CBM families are uncommon, so the establishment and structural characterisation of CBM92 enriches the classification database and will facilitate functional prediction in future projects. We propose that CBM92 proteins may cross-link polysaccharides in nature, and might have use in novel strategies for enzyme immobilisation.
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Affiliation(s)
- Meng-Shu Hao
- Division of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91, Stockholm, Sweden
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, 311215, China
| | - Scott Mazurkewich
- Department of Life Sciences, Chalmers University of Technology, 41296, Gothenburg, Sweden
- Wallenberg Wood Science Center, Teknikringen 56-58, 10044, Stockholm, Sweden
| | - He Li
- Division of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91, Stockholm, Sweden
| | - Alma Kvammen
- Division of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91, Stockholm, Sweden
| | - Srijani Saha
- Division of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91, Stockholm, Sweden
| | - Salla Koskela
- Division of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91, Stockholm, Sweden
- Wallenberg Wood Science Center, Teknikringen 56-58, 10044, Stockholm, Sweden
| | - Annie R Inman
- Division of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91, Stockholm, Sweden
| | - Masahiro Nakajima
- Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Nobukiyo Tanaka
- Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Hiroyuki Nakai
- Faculty of Agriculture, Niigata University, Niigata, 950-2181, Japan
| | - Gisela Brändén
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-405 30, Gothenburg, Sweden
| | - Vincent Bulone
- Division of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91, Stockholm, Sweden
- College of Medicine and Public Health, Flinders University, Bedford Park Campus, Sturt Road, SA, 5042, Australia
| | - Johan Larsbrink
- Department of Life Sciences, Chalmers University of Technology, 41296, Gothenburg, Sweden
- Wallenberg Wood Science Center, Teknikringen 56-58, 10044, Stockholm, Sweden
| | - Lauren S McKee
- Division of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91, Stockholm, Sweden.
- Wallenberg Wood Science Center, Teknikringen 56-58, 10044, Stockholm, Sweden.
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3
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Xue Y, Zhao Z, Lei Y, Qiu Z, Li X, Wang C, Cui R, Shen S, Fang L, Wang Y, Ji J, Chen Z, Zhu H, Zhu B. Influence of the linkage between long alkyl tails and cationic groups on membrane activity of nano-sized hyperbranched polyquaterniums. J Colloid Interface Sci 2024; 653:894-907. [PMID: 37774653 DOI: 10.1016/j.jcis.2023.09.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 09/14/2023] [Accepted: 09/21/2023] [Indexed: 10/01/2023]
Abstract
The recurrent emergence of serious pathogens necessitates novel insights and highly efficient antibacterial agents. However, the innate inability of metal ions and reactive oxygen species (ROS) to differentiate between bacteria and mammalian cells presents a challenge, limiting the selectivity crucial for an ideal antimicrobial solution. Herein, we present a systematic exploration involving two variants of nano-sized hyperbranched polyquaterniums (NHBPQs) - one featuring a lengthy alkyl tail linked to the ammonium unit at the N-atom center (NHBPQ-A), and the other in a segregated configuration (NHBPQ-B). The exterior alkyl chain chains act as a barrier to the cationic group's non-specific adsorption due to spatial site resistance, causing NHBPQ-A in broad-spectrum cytotoxicity. Conversely, the distinct molecular configuration of NHBPQ-B in the segregated state affords greater flexibility, allowing the cationic groups to be released and interact non-specifically, finally resulting in selective bactericidal activity. Leveraging this selectivity, the optimized NHBPQ-B exhibits robust anti-infectious performance in a model of methicillin-resistant Staphylococcus aureus (MRSA)-infected wounds. This work establishes a promising avenue for biocompatible NHBPQs, holding significant potential in addressing MRSA infections and ameliorating both genetically encoded and phenotypic antibiotic resistance mechanisms.
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Affiliation(s)
- Yunyun Xue
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China; Center of Healthcare Materials, Shaoxing Institute, Zhejiang University, Shaoxing, 312000, China
| | - Zihao Zhao
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China; Center of Healthcare Materials, Shaoxing Institute, Zhejiang University, Shaoxing, 312000, China
| | - Yuqing Lei
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zelin Qiu
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xinfang Li
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Chuyao Wang
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ronglu Cui
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Shuyang Shen
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lifeng Fang
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
| | - Youxiang Wang
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jian Ji
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhi Chen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310027, China
| | - Haihong Zhu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310027, China
| | - Baoku Zhu
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China; Center of Healthcare Materials, Shaoxing Institute, Zhejiang University, Shaoxing, 312000, China.
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4
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Dam TK, Hohman O, Sheppard L, Brewer CF, Bandyopadhyay P. Mechanism of multivalent glycoconjugate-lectin interaction: An update. Adv Carbohydr Chem Biochem 2023; 84:1-21. [PMID: 37979977 DOI: 10.1016/bs.accb.2023.10.004] [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: 11/20/2023]
Abstract
Lectins are predominantly oligomeric proteins with several binding sites per molecule. Glycoconjugates are their natural ligands, which often possess multiple binding epitopes. Thus, lectin-glycoconjugate interactions are mostly multivalent in nature. The mechanism of multivalent binding is fundamentally different from those described for monovalent interactions in textbooks and research papers. Over the years, binding studies that make use of different lectins and a variety of multivalent glycoconjugate ligands were conducted in order to understand the underlying principles of multivalency. Starting with seemingly simple synthetic multivalent analogs, systematic studies were carried out using natural glycoconjugate ligands with increasing valency and complexity. Those ligands included multivalent glycoproteins, polyvalent polysaccharides, including glycosaminoglycans, as well as supra-valent mucins and proteoglycans. Models and mechanisms of multivalent binding derived from quantitative data are summarized in the present updated review.
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Affiliation(s)
- Tarun K Dam
- Laboratory of Mechanistic Glycobiology, Department of Chemistry, Michigan Technological University, Houghton, MI, United States; Health Research Institute, Michigan Technological University, Houghton, MI, United States.
| | - Olivia Hohman
- Laboratory of Mechanistic Glycobiology, Department of Chemistry, Michigan Technological University, Houghton, MI, United States
| | - Lucas Sheppard
- Laboratory of Mechanistic Glycobiology, Department of Chemistry, Michigan Technological University, Houghton, MI, United States
| | - C Fred Brewer
- Department of Molecular Pharmacology, Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Purnima Bandyopadhyay
- Laboratory of Mechanistic Glycobiology, Department of Chemistry, Michigan Technological University, Houghton, MI, United States
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5
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Dam TK, Brewer CF. Multivalent lectin-carbohydrate interactions: Energetics and mechanisms of binding. Adv Carbohydr Chem Biochem 2023; 84:23-48. [PMID: 37979978 DOI: 10.1016/bs.accb.2023.10.005] [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: 11/20/2023]
Abstract
The biological signaling properties of lectins, which are carbohydrate-binding proteins, are due to their ability to bind and cross-link multivalent glycoprotein receptors on the surface of normal and transformed cells. While the cross-linking properties of lectins with multivalent carbohydrates and glycoproteins are relatively well understood, the mechanisms of binding of lectins to multivalent glycoconjugates are less well understood. Recently, the thermodynamics of binding of lectins to synthetic clustered glycosides, a multivalent globular glycoprotein, and to linear glycoproteins (mucins) have been described. The results are consistent with a dynamic binding mechanism in which lectins bind and jump from carbohydrate to carbohydrate epitope in these molecules. Importantly, the mechanism of binding of lectins to mucins is similar to that for a variety of protein ligands binding to DNA. Recent analysis also shows that high-affinity lectin-mucin cross-linking interactions are driven by favorable entropy of binding that is associated with the bind and jump mechanism. The results suggest that the binding of ligands to biopolymers, in general, may involve a common mechanism that involves enhanced entropic effects which facilitate binding and subsequent complex formation including enzymology.
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Affiliation(s)
- Tarun K Dam
- Formerly of the Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, United States.
| | - C Fred Brewer
- Department of Molecular Pharmacology, Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, United States
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6
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Deng L, Fu Q, Zhang Y, Shui F, Tang J, Wu J, Zeng J. Study of molecular interactions by nonequilibrium capillary electrophoresis of equilibrium mixtures: Originations, developments, and applications. Electrophoresis 2023; 44:1664-1673. [PMID: 37621032 DOI: 10.1002/elps.202300166] [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] [Received: 07/26/2023] [Revised: 08/16/2023] [Accepted: 08/18/2023] [Indexed: 08/26/2023]
Abstract
Molecular interactions play a vital role in regulating various physiological and biochemical processes in vivo. Kinetic capillary electrophoresis (KCE) is an analytical platform that offers significant advantages in studying the thermodynamic and kinetic parameters of molecular interactions. It enables the simultaneous analysis of these parameters within an interaction pattern and facilitates the screening of binding ligands with predetermined kinetic parameters. Nonequilibrium capillary electrophoresis of equilibrium mixtures (NECEEM) was the first proposed KCE method, and it has found widespread use in studying molecular interactions involving proteins/aptamers, proteins/small molecules, and peptides/small molecules. The successful applications of NECEEM have demonstrated its promising potential for further development and broader application. However, there has been a dearth of recent reviews on NECEEM. To address this gap, our study provides a comprehensive description of NECEEM, encompassing its origins, development, and applications from 2015 to 2022. The primary focus of the applications section is on aptamer selection and screening of small-molecule ligands. Furthermore, we discuss important considerations in NECEEM experimental design, such as buffer suitability, detector selection, and protein adsorption. By offering this thorough review, we aim to contribute to the understanding, advancement, and wider utilization of NECEEM as a valuable tool for studying molecular interactions and facilitating the identification of potential ligands and targets.
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Affiliation(s)
- Li Deng
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Qifeng Fu
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Yujie Zhang
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Fan Shui
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Jia Tang
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Jianming Wu
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
- School of Basic Medical Science, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Jing Zeng
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
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7
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Chen K, He D, Liu Q, Fan Y, Wang Z, Zhang W, Tang BZ. Aggregates of Ionic-Bonds Coupled Polymer and Their Photosensitization Enhancement Effect. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2208052. [PMID: 36942697 DOI: 10.1002/smll.202208052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/28/2023] [Indexed: 06/18/2023]
Abstract
The formation of nanoaggregates makes a great difference to the improvement of photodynamic therapy (PDT) performance to some extent, but constructing stable aggregates with a clear structure is simultaneously a big challenge for us. Herein, just by electrostatic interaction, cationic 2PAHs and anionic FBA351, regarded as donor (D) and acceptor (A), respectively, are utilized to prepare stable aggregate of ionic-bonds coupled polymer (ICP) with repeated "D-A" structure, which is fully characterized by nuclear magnetic resonance (NMR), time-of-flight mass spectrometry, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). Remarkably, aggregate ICP with multiple "D-A" structures showed enhanced photosensitization efficiency over its precursor 2PAHs and FBA351, which is in accord with the image-guided photodynamic anticancer therapy. Such results not only offer a simple way to obtain stable aggregate but also give us a guideline to design efficient photosensitizers.
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Affiliation(s)
- Kongqi Chen
- School of Materials Science and Engineering, Center for Aggregation-Induced Emission, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Dong He
- Department of Urology, The First Affiliated Hospital of Soochow University, 188 Shizi RD, Suzhou, 215006, China
| | - Qiong Liu
- School of Materials Science and Engineering, Center for Aggregation-Induced Emission, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Yuanzhong Fan
- School of Materials Science and Engineering, Center for Aggregation-Induced Emission, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Zhiming Wang
- School of Materials Science and Engineering, Center for Aggregation-Induced Emission, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Weijie Zhang
- Department of Urology, The First Affiliated Hospital of Soochow University, 188 Shizi RD, Suzhou, 215006, China
| | - Ben Zhong Tang
- Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172, China
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8
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Rayala R, Tiller A, Majumder SA, Stacy HM, Eans SO, Nedovic A, McLaughlin JP, Cudic P. Solid-Phase Synthesis of the Bicyclic Peptide OL-CTOP Containing Two Disulfide Bridges, and an Assessment of Its In Vivo μ-Opioid Receptor Antagonism after Nasal Administration. Molecules 2023; 28:1822. [PMID: 36838810 PMCID: PMC9963138 DOI: 10.3390/molecules28041822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 02/02/2023] [Accepted: 02/13/2023] [Indexed: 02/17/2023] Open
Abstract
New strategies facilitate the design of cyclic peptides which can penetrate the brain. We have designed a bicyclic peptide, OL-CTOP, composed of the sequences of a selective μ-opioid receptor antagonist, CTOP (f-cyclo(CYwOTX)T) (X = penicillamine, Pen; O = ornithine) and odorranalectin, OL (YASPK-cyclo(CFRYPNGVLAC)T), optimized its solid-phase synthesis and demonstrated its ability for nose-to-brain delivery and in vivo activity. The differences in reactivity of Cys and Pen thiol groups protected with trityl and/or acetamidomethyl protecting groups toward I2 in different solvents were exploited for selective disulfide bond formation on the solid phase. Both the single step and the sequential strategy applied to macrocyclization reactions generated the desired OL-CTOP, with the sequential strategy yielding a large quantity and better purity of crude OL-CTOP. Importantly, intranasally (i.n.s.) administered OL-CTOP dose-dependently antagonized the analgesic effect of morphine administered to mice through the intracerebroventricular route and prevented morphine-induced respiratory depression. In summary, the results demonstrate the feasibility of our solid-phase synthetic strategy for the preparation of the OL-CTOP bicyclic peptide containing two disulfide bonds and reveal the potential of odorranalectin for further modifications and the targeted delivery to the brain.
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Affiliation(s)
- Ramanjaneyulu Rayala
- Department of Chemistry and Biochemistry, Charles E. Schmidt College of Science, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA
| | - Annika Tiller
- Department of Chemistry and Biochemistry, Charles E. Schmidt College of Science, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA
| | - Shahayra A. Majumder
- Department of Pharmacodynamics, School of Pharmacy, University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA
| | - Heather M. Stacy
- Department of Pharmacodynamics, School of Pharmacy, University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA
| | - Shainnel O. Eans
- Department of Pharmacodynamics, School of Pharmacy, University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA
| | - Aleksandra Nedovic
- Department of Chemistry and Biochemistry, Charles E. Schmidt College of Science, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA
| | - Jay P. McLaughlin
- Department of Pharmacodynamics, School of Pharmacy, University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA
| | - Predrag Cudic
- Department of Chemistry and Biochemistry, Charles E. Schmidt College of Science, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA
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9
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Bruneau A, Gillon E, Furiga A, Brachet E, Alami M, Roques C, Varrot A, Imberty A, Messaoudi S. Discovery of potent 1,1-diarylthiogalactoside glycomimetic inhibitors of Pseudomonas aeruginosa LecA with antibiofilm properties. Eur J Med Chem 2023; 247:115025. [PMID: 36549118 DOI: 10.1016/j.ejmech.2022.115025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/28/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
In this work, β-thiogalactoside mimetics bearing 1,1-diarylmethylene or benzophenone aglycons have been prepared and assayed for their affinity towards LecA, a lectin and virulence factor from Pseudomonas aeruginosa involved in bacterial adhesion and biofilm formation. The hit compound presents higher efficiency than previously described monovalent inhibitors and the crystal structure confirmed the occurrence of additional contacts between the aglycone and the protein surface. The highest affinity (160 nM) was obtained for a divalent ligand containing two galactosides. The monovalent high affinity compound (Kd = 1 μM) obtained through structure-activity relationship (SAR) showed efficient antibiofilm activity with no associated bactericidal activity.
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Affiliation(s)
- Alexandre Bruneau
- BioCIS, Univ. Paris-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry, France
| | - Emilie Gillon
- Université Grenoble Alpes, CNRS, CERMAV, 38000, Grenoble, France
| | - Aurélie Furiga
- LCG, Laboratoire de Génie Chimique (UMR 5503), Département Bioprocédés et Systèmes Microbiens, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Etienne Brachet
- BioCIS, Univ. Paris-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry, France
| | - Mouad Alami
- BioCIS, Univ. Paris-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry, France
| | - Christine Roques
- LCG, Laboratoire de Génie Chimique (UMR 5503), Département Bioprocédés et Systèmes Microbiens, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Annabelle Varrot
- Université Grenoble Alpes, CNRS, CERMAV, 38000, Grenoble, France
| | - Anne Imberty
- Université Grenoble Alpes, CNRS, CERMAV, 38000, Grenoble, France.
| | - Samir Messaoudi
- BioCIS, Univ. Paris-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry, France.
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10
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Oka N, Mori S, Ikegaya M, Park EY, Miyazaki T. Crystal structure and sugar-binding ability of the C-terminal domain of N-acetylglucosaminyltransferase IV establish a new carbohydrate-binding module family. Glycobiology 2022; 32:1153-1163. [PMID: 36106687 DOI: 10.1093/glycob/cwac058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/25/2022] [Accepted: 08/25/2022] [Indexed: 01/07/2023] Open
Abstract
N-glycans are modified by glycosyltransferases in the endoplasmic reticulum and Golgi apparatus. N-acetylglucosaminyltransferase IV (GnT-IV) is a Golgi-localized glycosyltransferase that synthesizes complex-type N-glycans in vertebrates. This enzyme attaches N-acetylglucosamine (GlcNAc) to the α-1,3-linked mannose branch of the N-glycan core structure via a β-1,4 linkage. Deficiency of this enzyme is known to cause abnormal cellular functions, making it a vital enzyme for living organisms. However, there has been no report on its 3-dimensional structure to date. Here, we demonstrated that the C-terminal regions (named CBML) of human GnT-IVa and Bombyx mori ortholog have the ability to bind β-N-acetylglucosamine. In addition, we determined the crystal structures of human CBML, B. mori CBML, and its complex with β-GlcNAc at 1.97, 1.47, and 1.15 Å resolutions, respectively, and showed that they adopt a β-sandwich fold, similar to carbohydrate-binding module family 32 (CBM32) proteins. The regions homologous to CBML (≥24% identity) were found in GnT-IV isozymes, GnT-IVb, and GnT-IVc (known as GnT-VI), and the structure of B. mori CBML in complex with β-GlcNAc indicated that the GlcNAc-binding residues were highly conserved among these isozymes. These residues are also conserved with the GlcNAc-binding CBM32 domain of β-N-acetylhexosaminidase NagH from Clostridium perfringens despite the low sequence identity (<20%). Taken together with the phylogenetic analysis, these findings indicate that these CBMLs may be novel CBM family proteins with GlcNAc-binding ability.
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Affiliation(s)
- Nozomi Oka
- Department of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Sota Mori
- Department of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Marina Ikegaya
- Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Enoch Y Park
- Department of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.,Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.,Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Takatsugu Miyazaki
- Department of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.,Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.,Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
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11
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Micallef J, Baker AN, Richards SJ, Soutar DE, Georgiou PG, Walker M, Gibson MI. Polymer-tethered glyconanoparticle colourimetric biosensors for lectin binding: structural and experimental parameters to ensure a robust output. RSC Adv 2022; 12:33080-33090. [PMID: 36425181 PMCID: PMC9672907 DOI: 10.1039/d2ra06265h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 11/07/2022] [Indexed: 11/19/2022] Open
Abstract
Glycan-lectin interactions play essential roles in biology; as the site of attachment for pathogens, cell-cell communication, and as crucial players in the immune system. Identifying if a new glycan (natural or unnatural) binds a protein partner, or if a new protein (or mutant) binds a glycan remains a non-trivial problem, with few accessible or low-cost tools available. Micro-arrays allow for the interrogation of 100's of glycans but are not widely available in individual laboratories. Biophysical techniques such as isothermal titration calorimetry, surface plasmon resonance spectrometry, biolayer interferometry and nuclear magnetic resonance spectroscopy all provide detailed understanding of glycan binding but are relatively expensive. Glycosylated plasmonic nanoparticles based on gold cores with polymeric tethers have emerged as biosensors to detect glycan-protein binding, based on colourimetric (red to blue) outputs which can be easily interpreted by a simple UV-visible spectrometer or by eye. Despite the large number of reports there are no standard protocols for each system or recommended start points, to allow a new user to deploy this technology. Here we explore the key parameters of nanoparticle size, polymeric tether length and gold concentration to provide some guidelines for how polymer-tethered glycosylated gold nanoparticles can be used to probe a new glycan/protein interactions, with minimal optimisation barriers. This work aimed to remove the need to explore chemical and nanoparticle space and hence remove a barrier for other users when deploying this system. We show that the concentration of the gold core is crucial to balance strong responses versus false positives and recommend a gold core size and polymer tether length which balances sufficient colloidal stability and output. Whilst subtle differences between glycans/lectins will impact the outcomes, these parameters should enable a lab user to quickly evaluate binding using minimal quantities of the glycan and lectin, to select candidates for further study.
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Affiliation(s)
| | | | | | | | | | - Marc Walker
- Department of Physics, University of Warwick CV4 7AL UK
| | - Matthew I Gibson
- Department of Chemistry, University of Warwick CV4 7AL UK
- Division of Biomedical Sciences, Warwick Medical School, University of Warwick Gibbet Hill Road CV4 7AL Coventry UK
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12
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Hooper J, Liu Y, Budhadev D, Ainaga DF, Hondow N, Zhou D, Guo Y. Polyvalent Glycan Quantum Dots as a Multifunctional Tool for Revealing Thermodynamic, Kinetic, and Structural Details of Multivalent Lectin-Glycan Interactions. ACS APPLIED MATERIALS & INTERFACES 2022; 14:47385-47396. [PMID: 36194567 PMCID: PMC9614721 DOI: 10.1021/acsami.2c11111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
Multivalent lectin-glycan interactions (MLGIs) are widespread and vital for biology. Their binding biophysical and structural details are thus highly valuable, not only for the understanding of binding affinity and specificity mechanisms but also for guiding the design of multivalent therapeutics against specific MLGIs. However, effective techniques that can reveal all such details remain unavailable. We have recently developed polyvalent glycan quantum dots (glycan-QDs) as a new probe for MLGIs. Using a pair of closely related tetrameric viral-binding lectins, DC-SIGN and DC-SIGNR, as model examples, we have revealed and quantified their large affinity differences in glycan-QD binding are due to distinct binding modes: with simultaneous binding for DC-SIGN and cross-linking for DC-SIGNR. Herein, we further extend the capacity of the glycan-QD probes by investigating the correlation between binding mode and binding thermodynamics and kinetics and further probing a structural basis of their binding nature. We reveal that while both lectins' binding with glycan-QDs is enthalpy driven with similar binding enthalpy changes, DC-SIGN pays a lower binding entropy penalty, resulting in a higher affinity than DC-SIGNR. We then show that DC-SIGN binding gives a single second-order kon rate, whereas DC-SIGNR gives a rapid initial binding followed by a much slower secondary interaction. We further identify a structural element in DC-SIGN, absent in DC-SIGNR, that plays an important role in maintaining DC-SIGN's MLGI character. Its removal switches the binding from being enthalpically to entropically driven and gives mixed binding modes containing both simultaneous and cross-linking binding behavior, without markedly affecting the overall binding affinity and kinetics.
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Affiliation(s)
- James Hooper
- School
of Food Science & Nutrition and Astbury Centre for Structural
Molecular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Yuanyuan Liu
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, United
Kingdom
| | - Darshita Budhadev
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, United
Kingdom
| | - Dario Fernandez Ainaga
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, United Kingdom
| | - Nicole Hondow
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, United Kingdom
| | - Dejian Zhou
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, United
Kingdom
| | - Yuan Guo
- School
of Food Science & Nutrition and Astbury Centre for Structural
Molecular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom
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13
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Notova S, Cannac N, Rabagliati L, Touzard M, Mante J, Navon Y, Coche-Guérente L, Lerouxel O, Heux L, Imberty A. Building an Artificial Plant Cell Wall on a Lipid Bilayer by Assembling Polysaccharides and Engineered Proteins. ACS Synth Biol 2022; 11:3516-3528. [PMID: 36194500 DOI: 10.1021/acssynbio.2c00404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The cell wall constitutes a fundamental structural component of plant cells, providing them with mechanical resistance and flexibility. Mimicking this wall is a critical step in the conception of an experimental model of the plant cell. The assembly of cellulose/hemicellulose in the form of cellulose nanocrystals and xyloglucans as a representative model of the plant cell wall has already been mastered; however, these models lacked the pectin component. In this work, we used an engineered chimeric protein designed for bridging pectin to the cellulose/hemicellulose network, therefore achieving the assembly of complete cell wall mimics. We first engineered a carbohydrate-binding module from Ruminococcus flavefaciens able to bind oligogalacturonan, resulting in high-affinity polygalacturonan receptors with Kd in the micromolar range. A Janus protein, with cell wall gluing property, was then designed by assembling this carbohydrate-binding module with a Ralstonia solanacearum lectin specific for fucosylated xyloglucans. The resulting supramolecular architecture is able to bind fucose-containing xyloglucans and homogalacturonan, ensuring high affinity for both. A two-dimensional assembly of an artificial plant cell wall was then built first on synthetic polymer and then on the supported lipid bilayer. Such an artificial cell wall can serve as a basis for the development of plant cell mechanical models and thus deepen the understanding of the principles underlying various aspects of plant cells and tissues.
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Affiliation(s)
- Simona Notova
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Nathan Cannac
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Luca Rabagliati
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Maeva Touzard
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Josselin Mante
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Yotam Navon
- The Pulp and Paper Research & Technical Centre, 38044Grenoble, France
| | | | | | - Laurent Heux
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Anne Imberty
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
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14
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Mondal S, Das S, Swamy MJ. Macromolecular Crowding Significantly Affects the Conformational Features and Carbohydrate Binding Properties of CIA17, a PP2-Type Lectin from Coccinia indica. Biochemistry 2022; 61:2344-2357. [PMID: 36200563 DOI: 10.1021/acs.biochem.2c00389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The effect of macromolecular crowding on the conformational features and carbohydrate binding properties of CIA17, a PP2-type lectin, was investigated employing polymeric dextrans D6, D40, and D70 (Mr ∼ 6, 40, and 70 kDa, respectively) as crowders. While the secondary structure of CIA17 was significantly affected by D6, with a considerable decrease in the number of β-sheets and β-turns with a corresponding increase in the number of unordered structures, relatively smaller changes were induced by D40 and D70. However, differential scanning calorimetry (DSC) studies revealed that the thermal stability of the protein remains unchanged in the presence of crowders. While the larger dextrans, D70 and D40, induced modest quenching (∼10%) of the protein fluorescence by a static pathway, the smaller D6 induced a higher degree of quenching (37%), which involved both static and collisional quenching processes. The results of fluorescence correlation spectroscopy measurements together with DSC studies suggested that CIA17 forms larger oligomers in the presence of D40 and D70 but D6 prevents the formation of higher-order oligomers. The association constant for the CIA17-chitooligosaccharide interaction increased by ∼30% and 160% in the presence of D40 and D70, respectively, but decreased by ∼30% in the presence of D6. The higher binding affinity can be attributed to the excluded volume effect, i.e., an increased effective concentration of the protein in the presence of D40 and D70, whereas D6, being smaller, possibly penetrates into the protein interior, disrupting the water structure around the protein and also inducing conformational changes, resulting in weaker binding. These observations demonstrate that molecular crowding significantly affects the carbohydrate binding characteristics of lectins, which can modulate their physiological function.
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Affiliation(s)
- Saradamoni Mondal
- School of Chemistry, University of Hyderabad, Hyderabad500 046, India
| | - Somnath Das
- School of Chemistry, University of Hyderabad, Hyderabad500 046, India
| | - Musti J Swamy
- School of Chemistry, University of Hyderabad, Hyderabad500 046, India
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15
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Mondal S, Das S, Paul S, Barik S, Swamy MJ. Low-pH Molten Globule-Like Form of CIA17, a Chitooligosaccharide-Specific Lectin from the Phloem Exudate of Coccinia indica, Retains Carbohydrate-Binding Ability. J Phys Chem B 2022; 126:4049-4060. [PMID: 35621271 DOI: 10.1021/acs.jpcb.2c01892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
pH-induced changes in the conformation, structural dynamics, and carbohydrate-binding activity of Coccinia indica agglutinin (CIA17), a PP2-type lectin, were investigated employing biophysical approaches. The secondary structure of CIA17 remains nearly unaltered over a wide pH range (2.0-8.5), while the tertiary structure of the protein exhibits considerable changes. A decrease in the fluorescence intensity and excited-state lifetime at low pH indicated perturbation in the local conformation (near Trp residues) of CIA17, which was further supported by enhancement in the Trp accessibility toward charged quenchers under acidic conditions. Fluorescence correlation spectroscopic studies indicated that at pH 2.0, CIA17 exists as a monomer over the concentration range of 10-200 nM and forms dimers at higher concentrations (KD ∼ 387 nM) but could not form higher oligomers even at ∼150-fold higher concentrations, unlike under native conditions at pH 7.4. Thermal unfolding of the low pH intermediate involves two distinct steps: dissociation of a dimer to a monomer, followed by the unfolding of the monomer. These results strongly suggest that the acid-induced unfolding pathway of CIA17 involves the formation of a monomeric molten globule-like intermediate, which retains appreciable carbohydrate-binding ability. These observations are of great physiological significance since the PP2 proteins are involved in plant defense responses.
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Affiliation(s)
- Saradamoni Mondal
- School of Chemistry, University of Hyderabad, Hyderabad-500 046, India
| | - Somnath Das
- School of Chemistry, University of Hyderabad, Hyderabad-500 046, India
| | - Sumanta Paul
- School of Chemistry, University of Hyderabad, Hyderabad-500 046, India
| | - Shilpa Barik
- School of Chemistry, University of Hyderabad, Hyderabad-500 046, India
| | - Musti J Swamy
- School of Chemistry, University of Hyderabad, Hyderabad-500 046, India
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16
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Singh Y, Cudic P, Cudic M. Exploring Glycan Binding Specificity of Odorranalectin by Alanine Scanning Library. European J Org Chem 2022; 2022. [PMID: 36120398 PMCID: PMC9479679 DOI: 10.1002/ejoc.202200302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Fluorescently labelled alanine scan analogues of odorranalectin (OL), a cyclic peptide that exhibits lectin like properties, were screened for binding BSA-conjugated monosaccharides using an enzyme-linked lectin assay (ELLA). Results revealed that Lys5, Phe7, Tyr9, Gly12, Leu14, and Thr17 were crucial for binding BSA-L-fucose, BSA-D-galactose and BSA-N-acetyl-D-galactosamine. Notably, Ala substitution of Ser3, Pro4, and Val13 resulted in higher binding affinities compared to the native OL. The obtained data also indicated that Arg8 plays an important role in differentiation of binding for BSA-L-fucose/D-galactose from BSA-N-acetyl-D-galactosamine. The thermodynamics of binding of the selected alanine analogues was evaluated by isothermal titration calorimetry. Low to moderate binding affinities were determined for the tetravalent MUC1 glycopeptide and asialofetuin, respectively, and high for the fucose rich polysaccharide, fucoidan. The thermodynamic profile of interactions with asialofetuin exhibits shift to an entropy-driven mechanism compared to the fucoidan, which displayed an enthalpyentropy compensation, typically associated with the carbohydratelectin recognition process.
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Affiliation(s)
- YashoNandini Singh
- Department of Chemistry and Biochemistry Florida Atlantic University 777 Glades Road Boca Raton Florida 33431 United States
| | - Predrag Cudic
- Department of Chemistry and Biochemistry Florida Atlantic University 777 Glades Road Boca Raton Florida 33431 United States
| | - Maré Cudic
- Department of Chemistry and Biochemistry Florida Atlantic University 777 Glades Road Boca Raton Florida 33431 United States
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17
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DiLillo AM, Chan KK, Sun XL, Ao G. Glycopolymer-Wrapped Carbon Nanotubes Show Distinct Interaction of Carbohydrates With Lectins. Front Chem 2022; 10:852988. [PMID: 35308788 PMCID: PMC8927622 DOI: 10.3389/fchem.2022.852988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 02/14/2022] [Indexed: 11/17/2022] Open
Abstract
Glyconanomaterials with unique nanoscale property and carbohydrate functionality show vast potential in biological and biomedical applications. We investigated the interactions of noncovalent complexes of single-wall carbon nanotubes that are wrapped by disaccharide lactose-containing glycopolymers with the specific carbohydrate-binding proteins. The terminal galactose (Gal) of glycopolymers binds to the specific lectin as expected. Interestingly, an increased aggregation of nanotubes was also observed when interacting with a glucose (Glc) specific lectin, likely due to the removal of Glc groups from the surface of nanotubes resulting from the potential binding of the lectin to the Glc in the glycopolymers. This result indicates that the wrapping conformation of glycopolymers on the surface of nanotubes potentially allows improved accessibility of the Glc for specific lectins. Furthermore, it shows that the interaction between Glc groups in the glycopolymers and nanotubes play a key role in stabilizing the nanocomplexes. Overall, our results demonstrate that nanostructures can enable conformation-dependent interactions of glycopolymers and proteins and can potentially lead to the creation of versatile optical sensors for detecting carbohydrate-protein interactions with enhanced specificity and sensitivity.
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Affiliation(s)
- Ana M. DiLillo
- Department of Chemical and Biomedical Engineering, Washkewicz College of Engineering, Cleveland State University, Cleveland, OH, United States
| | - Ka Keung Chan
- Department of Chemistry, Center for Gene Regulation in Health and Disease (GRHD), Cleveland State University, Cleveland, OH, United States
| | - Xue-Long Sun
- Department of Chemical and Biomedical Engineering, Washkewicz College of Engineering, Cleveland State University, Cleveland, OH, United States
- Department of Chemistry, Center for Gene Regulation in Health and Disease (GRHD), Cleveland State University, Cleveland, OH, United States
- *Correspondence: Geyou Ao, , orcid.org/0000-0002-9932-3971; Xue-Long Sun, , orcid.org/0000-0001-6483-1709
| | - Geyou Ao
- Department of Chemical and Biomedical Engineering, Washkewicz College of Engineering, Cleveland State University, Cleveland, OH, United States
- *Correspondence: Geyou Ao, , orcid.org/0000-0002-9932-3971; Xue-Long Sun, , orcid.org/0000-0001-6483-1709
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18
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Neutron crystallography reveals mechanisms used by Pseudomonas aeruginosa for host-cell binding. Nat Commun 2022; 13:194. [PMID: 35017516 PMCID: PMC8752737 DOI: 10.1038/s41467-021-27871-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 12/15/2021] [Indexed: 12/22/2022] Open
Abstract
The opportunistic pathogen Pseudomonas aeruginosa, a major cause of nosocomial infections, uses carbohydrate-binding proteins (lectins) as part of its binding to host cells. The fucose-binding lectin, LecB, displays a unique carbohydrate-binding site that incorporates two closely located calcium ions bridging between the ligand and protein, providing specificity and unusually high affinity. Here, we investigate the mechanisms involved in binding based on neutron crystallography studies of a fully deuterated LecB/fucose/calcium complex. The neutron structure, which includes the positions of all the hydrogen atoms, reveals that the high affinity of binding may be related to the occurrence of a low-barrier hydrogen bond induced by the proximity of the two calcium ions, the presence of coordination rings between the sugar, calcium and LecB, and the dynamic behaviour of bridging water molecules at room temperature. These key structural details may assist in the design of anti-adhesive compounds to combat multi-resistance bacterial infections. Pseudomonas aeruginosa employs lectins to bind to its host cells, and is known to be the major cause of lung infections. Lectin B (LecB) from Pseudomonas aeruginosa binds specifically to galactose and fucose and is important for pathogenicity, adhesion and biofilm formation. In this work, the neutron crystal structure (1.9 Å) of the deuterated LecB/Ca/fucose complex is reported. The structure, in combination with perdeuteration of the ligand and the receptor allowed the observation of hydrogen atoms, protonation states and hydrogen bonds involved in the interaction between pathogenic bacteria and host cells. Thus the study provides structural insights into the mechanism of high affinity binding of LecB to its targets.
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19
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Dam TK, Edwards JL, Kadav PD, Brewer CF. Mechanism of Mucin Recognition by Lectins: A Thermodynamic Study. Methods Mol Biol 2022; 2442:169-185. [PMID: 35320526 DOI: 10.1007/978-1-0716-2055-7_10] [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: 06/14/2023]
Abstract
Isothermal titration microcalorimetry (ITC) can directly determine the thermodynamic binding parameters of biological molecules including affinity constant, binding stoichiometry, heat of binding (enthalpy) and indirectly the entropy, and free energy of binding. ITC has been extensively used to study the binding of lectins to mono- and oligosaccharides, but limitedly in applications to lectin-glycoprotein interactions. Inherent experimental challenges to ITC include sample precipitation during the experiment and relative high amount of sample required, but careful design of experiments can minimize these problems and allow valuable information to be obtained. For example, the thermodynamics of binding of lectins to multivalent globular and linear glycoproteins (mucins) have been described. The results are consistent with a dynamic binding mechanism in which lectins bind and jump from carbohydrate to carbohydrate epitope in these molecules leading to increased affinity. Importantly, the mechanism of binding of lectins to mucins appears similar to that for a variety of protein ligands binding to DNA. Recent results also show that high-affinity lectin-mucin cross-linking interactions are driven by favorable entropy of binding that is associated with the bind and jump mechanism. The results suggest that the binding of ligands to biopolymers, in general, may involve a common mechanism that involves enhanced entropic effects that facilitate binding interactions.
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Affiliation(s)
- Tarun K Dam
- Laboratory of Mechanistic Glycobiology Department of Chemistry, Michigan Technological University, Houghton, MI, USA.
- Health Research Institute, Michigan Technological University, Houghton, MI, USA.
| | - Jared L Edwards
- Laboratory of Mechanistic Glycobiology Department of Chemistry, Michigan Technological University, Houghton, MI, USA
| | - Priyanka D Kadav
- Laboratory of Mechanistic Glycobiology Department of Chemistry, Michigan Technological University, Houghton, MI, USA
| | - C Fred Brewer
- Departments of Molecular Pharmacology, and Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
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20
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Shao S, Wang Y, Xie Z, Xu R, Wan X, Wang E, Wang Z, Liu S, Chen C, Yang H. 96-well plate format in conjunction with ultra-high-performance liquid chromatography coupled to orbitrap mass spectrometry for high-throughput screening protein binders from ginseng. J Pharm Biomed Anal 2021; 209:114498. [PMID: 34952293 DOI: 10.1016/j.jpba.2021.114498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 11/02/2021] [Accepted: 11/24/2021] [Indexed: 10/19/2022]
Abstract
Conventional strategies for screening of protein binders cannot be used for complicated samples such as ligand libraries created by combinatorial chemistry or from natural product extracts. In the current study, we developed a novel method in a competitive binding configuration for screening protein binders from complicated samples by a combination of streptavidin-coated 96-well plate format in conjunction with ultra-high-performance liquid chromatography coupled with Orbitrap mass spectrometry (UHPLC-Orbitrap-MS). The concanavalin A (Con A) modified 96-well plate and lysozyme modified 96-well plate (as control) were incubated with oligosaccharide standards respectively, and the compounds with the decreased peak areas in experimental group compared to those in the control group were detected as binders by UHPLC-ESI-MS. The factors such as incubation time, incubation temperature, and buffer, which might affect the binding affinity and reproducibility were optimized. The potential of the approach is examined using the extracts of Radix ginseng cruda and American ginseng. The relative binding degrees (RBDs) of the detected disaccharides were relatively high in the extracts of Radix ginseng cruda, and those of the trisaccharides were similar in the extracts of the two kinds of ginseng. To our knowledge, it's the first time to reveal the differences and analogies in lectin peanut agglutinin (PNA)-binding capabilities of oligosaccharides between the extracts of radix ginseng cruda and American ginseng, indicating the efficiency of the method for analysis of complicated samples.
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Affiliation(s)
- Simeng Shao
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Yihan Wang
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Zhaoyang Xie
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Ruiyang Xu
- Jilin Shenshi Biological Technology Co., Ltd., Changchun 130028, China
| | - Xilin Wan
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Enpeng Wang
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Zhongxi Wang
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Shuying Liu
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Changbao Chen
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China.
| | - Hongmei Yang
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130117, China.
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21
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Cramer J, Lakkaichi A, Aliu B, Jakob RP, Klein S, Cattaneo I, Jiang X, Rabbani S, Schwardt O, Zimmer G, Ciancaglini M, Abreu Mota T, Maier T, Ernst B. Sweet Drugs for Bad Bugs: A Glycomimetic Strategy against the DC-SIGN-Mediated Dissemination of SARS-CoV-2. J Am Chem Soc 2021; 143:17465-17478. [PMID: 34652144 DOI: 10.1021/jacs.1c06778] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The C-type lectin receptor DC-SIGN is a pattern recognition receptor expressed on macrophages and dendritic cells. It has been identified as a promiscuous entry receptor for many pathogens, including epidemic and pandemic viruses such as SARS-CoV-2, Ebola virus, and HIV-1. In the context of the recent SARS-CoV-2 pandemic, DC-SIGN-mediated virus dissemination and stimulation of innate immune responses has been implicated as a potential factor in the development of severe COVID-19. Inhibition of virus binding to DC-SIGN, thus, represents an attractive host-directed strategy to attenuate overshooting innate immune responses and prevent the progression of the disease. In this study, we report on the discovery of a new class of potent glycomimetic DC-SIGN antagonists from a focused library of triazole-based mannose analogues. Structure-based optimization of an initial screening hit yielded a glycomimetic ligand with a more than 100-fold improved binding affinity compared to methyl α-d-mannopyranoside. Analysis of binding thermodynamics revealed an enthalpy-driven improvement of binding affinity that was enabled by hydrophobic interactions with a loop region adjacent to the binding site and displacement of a conserved water molecule. The identified ligand was employed for the synthesis of multivalent glycopolymers that were able to inhibit SARS-CoV-2 spike glycoprotein binding to DC-SIGN-expressing cells, as well as DC-SIGN-mediated trans-infection of ACE2+ cells by SARS-CoV-2 spike protein-expressing viruses, in nanomolar concentrations. The identified glycomimetic ligands reported here open promising perspectives for the development of highly potent and fully selective DC-SIGN-targeted therapeutics for a broad spectrum of viral infections.
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Affiliation(s)
- Jonathan Cramer
- University of Basel, Institute of Molecular Pharmacy, Pharmacenter of the University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland.,Institute for Pharmaceutical and Medicinal Chemistry, Heinrich-Heine-University of Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Adem Lakkaichi
- University of Basel, Institute of Molecular Pharmacy, Pharmacenter of the University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Butrint Aliu
- University of Basel, Institute of Molecular Pharmacy, Pharmacenter of the University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Roman P Jakob
- Department Biozentrum, Focal Area Structural Biology, University of Basel, Klingelbergstrasse 70, 4056 Basel, Switzerland
| | - Sebastian Klein
- University of Basel, Institute of Molecular Pharmacy, Pharmacenter of the University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Ivan Cattaneo
- University of Basel, Institute of Molecular Pharmacy, Pharmacenter of the University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Xiaohua Jiang
- University of Basel, Institute of Molecular Pharmacy, Pharmacenter of the University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Said Rabbani
- University of Basel, Institute of Molecular Pharmacy, Pharmacenter of the University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Oliver Schwardt
- University of Basel, Institute of Molecular Pharmacy, Pharmacenter of the University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Gert Zimmer
- Institute of Virology and Immunology, Sensemattstrasse 293, 3147 Mittelhäusern, Switzerland
| | - Matias Ciancaglini
- Department Biomedicine, University of Basel, Petersplatz 8, 4051 Basel, Switzerland
| | - Tiago Abreu Mota
- Department Biomedicine, University of Basel, Petersplatz 8, 4051 Basel, Switzerland
| | - Timm Maier
- Department Biozentrum, Focal Area Structural Biology, University of Basel, Klingelbergstrasse 70, 4056 Basel, Switzerland
| | - Beat Ernst
- University of Basel, Institute of Molecular Pharmacy, Pharmacenter of the University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
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22
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Abstract
Carbohydrate recognition is crucial for biological processes ranging from development to immune system function to host-pathogen interactions. The proteins that bind glycans are faced with a daunting task: to coax these hydrophilic species out of water and into a binding site. Here, we examine the forces underlying glycan recognition by proteins. Our previous bioinformatic study of glycan-binding sites indicated that the most overrepresented side chains are electron-rich aromatic residues, including tyrosine and tryptophan. These findings point to the importance of CH-π interactions for glycan binding. Studies of CH-π interactions show a strong dependence on the presence of an electron-rich π system, and the data indicate binding is enhanced by complementary electronic interactions between the electron-rich aromatic ring and the partial positive charge of the carbohydrate C-H protons. This electronic dependence means that carbohydrate residues with multiple aligned highly polarized C-H bonds, such as β-galactose, form strong CH-π interactions, whereas less polarized residues such as α-mannose do not. This information can guide the design of proteins to recognize sugars and the generation of ligands for proteins, small molecules, or catalysts that bind sugars.
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Affiliation(s)
- Laura L. Kiessling
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Roger C. Diehl
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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23
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Porciúncula-González C, Cagnoni AJ, Fontana C, Mariño KV, Saenz-Méndez P, Giacomini C, Irazoqui G. Structural insights in galectin-1-glycan recognition: Relevance of the glycosidic linkage and the N-acetylation pattern of sugar moieties. Bioorg Med Chem 2021; 44:116309. [PMID: 34293617 DOI: 10.1016/j.bmc.2021.116309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 07/06/2021] [Accepted: 07/08/2021] [Indexed: 10/20/2022]
Abstract
Galectins, soluble lectins widely expressed intra- and extracellularly in different cell types, play major roles in deciphering the cellular glycocode. Galectin-1 (Gal-1), a prototype member of this family, presents a carbohydrate recognition domain (CRD) with specific affinity for β-galactosides such as N-acetyllactosamine (β-d-Galp-(1 → 4)-d-GlcpNAc), and mediate numerous physiological and pathological processes. In this work, Gal-1 binding affinity for β-(1 → 6) galactosides, including β-d-Galp-(1 → 6)-β-d-GlcpNAc-(1 → 4)-d-GlcpNAc was evaluated, and their performance was compared to that of β-(1 → 4) and β-(1 → 3) galactosides. To this end, the trisaccharide β-d-Galp-(1 → 6)-β-d-GlcpNAc-(1 → 4)-d-GlcpNAc was enzymatically synthesized, purified and structurally characterized. To evaluate the affinity of Gal-1 for the galactosides, competitive solid phase assays (SPA) and isothermal titration calorimetry (ITC) studies were carried out. The experimental dissociation constants and binding energies obtained were compared to those calculated by molecular docking. These analyses evidenced the critical role of the glycosidic linkage between the terminal galactopyranoside residue and the adjacent monosaccharide, as galactosides bearing β-(1 → 6) glycosidic linkages showed dissociation constants six- and seven-fold higher than those involving β-(1 → 4) and β-(1 → 3) linkages, respectively. Moreover, docking experiments revealed the presence of hydrogen bond interactions between the N-acetyl group of the glucosaminopyranose moiety of the evaluated galactosides and specific amino acid residues of Gal-1, relevant for galectin-glycan affinity. Noticeably, the binding free energies (ΔGbindcalc) derived from the molecular docking were in good agreement with experimental values determined by ITC measurements (ΔGbindexp), evidencing a good correlation between theoretical and experimental approaches, which validates the in silico simulations and constitutes an important tool for the rational design of future optimized ligands.
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Affiliation(s)
- Cecilia Porciúncula-González
- Laboratorio de Bioquímica, Departamento de Biociencias, Facultad de Química, UdelaR, Gral. Flores, 2124, 11800 Montevideo, Uruguay; Computational Chemistry and Biology Group, DETEMA, Facultad de Química, UdelaR, Isidoro de María 1614, 11800 Montevideo, Uruguay; Graduate Program in Chemistry, Facultad de Química, Universidad de la República, Uruguay
| | - Alejandro J Cagnoni
- Laboratorio de Glicómica Funcional y Molecular, Instituto de Biología y Medicina Experimental (IBYME), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), C1428ADN Buenos Aires, Argentina
| | - Carolina Fontana
- Laboratorio de Espectroscopía y Fisicoquímica Orgánica, Departamento de Química del Litoral, CENUR Litoral Norte (S.R.A. Facultad de Química), UdelaR, Ruta 3 km 363, 60000 Paysandú, Uruguay
| | - Karina V Mariño
- Laboratorio de Glicómica Funcional y Molecular, Instituto de Biología y Medicina Experimental (IBYME), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), C1428ADN Buenos Aires, Argentina
| | - Patricia Saenz-Méndez
- Computational Chemistry and Biology Group, DETEMA, Facultad de Química, UdelaR, Isidoro de María 1614, 11800 Montevideo, Uruguay; Department of Engineering and Chemical Sciences, Faculty of Health, Science and Technology, Karlstad University, Universitetsgatan 2, 651 88 Karlstad, Sweden
| | - Cecilia Giacomini
- Laboratorio de Bioquímica, Departamento de Biociencias, Facultad de Química, UdelaR, Gral. Flores, 2124, 11800 Montevideo, Uruguay
| | - Gabriela Irazoqui
- Laboratorio de Bioquímica, Departamento de Biociencias, Facultad de Química, UdelaR, Gral. Flores, 2124, 11800 Montevideo, Uruguay.
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24
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Fittolani G, Shanina E, Guberman M, Seeberger PH, Rademacher C, Delbianco M. Automatisierte Glykan‐Assemblierung
19
F‐markierter Glykansonden ermöglicht Hochdurchsatz‐NMR‐Untersuchungen von Protein‐Glykan‐Interaktionen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Giulio Fittolani
- Department of Biomolecular Systems Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Deutschland
- Department of Chemistry and Biochemistry Freie Universität Berlin Arnimallee 22 14195 Berlin Deutschland
| | - Elena Shanina
- Department of Biomolecular Systems Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Deutschland
- Department of Chemistry and Biochemistry Freie Universität Berlin Arnimallee 22 14195 Berlin Deutschland
| | - Mónica Guberman
- Department of Biomolecular Systems Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Deutschland
- Derzeitige Adresse: Medicinal Chemistry Leibniz-Forschungsinstitut für Molekulare Pharmakologie Robert-Rössle Straße 10 13125 Berlin Deutschland
| | - Peter H. Seeberger
- Department of Biomolecular Systems Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Deutschland
- Department of Chemistry and Biochemistry Freie Universität Berlin Arnimallee 22 14195 Berlin Deutschland
| | - Christoph Rademacher
- Department of Biomolecular Systems Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Deutschland
- Department of Chemistry and Biochemistry Freie Universität Berlin Arnimallee 22 14195 Berlin Deutschland
- Derzeitige Adresse: Department of Pharmaceutical Chemistry University of Vienna Althanstraße 14 1080 Wien Österreich
- Derzeitige Adresse: Department of Microbiology, Immunobiology and Genetics Max F. Perutz Labs Campus Vienna Biocenter 5 1030 Wien Österreich
| | - Martina Delbianco
- Department of Biomolecular Systems Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Deutschland
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25
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Fittolani G, Shanina E, Guberman M, Seeberger PH, Rademacher C, Delbianco M. Automated Glycan Assembly of 19 F-labeled Glycan Probes Enables High-Throughput NMR Studies of Protein-Glycan Interactions. Angew Chem Int Ed Engl 2021; 60:13302-13309. [PMID: 33784430 PMCID: PMC8252726 DOI: 10.1002/anie.202102690] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/19/2021] [Indexed: 12/23/2022]
Abstract
Protein–glycan interactions mediate important biological processes, including pathogen host invasion and cellular communication. Herein, we showcase an expedite approach that integrates automated glycan assembly (AGA) of 19F‐labeled probes and high‐throughput NMR methods, enabling the study of protein–glycan interactions. Synthetic Lewis type 2 antigens were screened against seven glycan binding proteins (GBPs), including DC‐SIGN and BambL, respectively involved in HIV‐1 and lung infections in immunocompromised patients, confirming the preference for fucosylated glycans (Lex, H type 2, Ley). Previously unknown glycan–lectin weak interactions were detected, and thermodynamic data were obtained. Enzymatic reactions were monitored in real‐time, delivering kinetic parameters. These results demonstrate the utility of AGA combined with 19F NMR for the discovery and characterization of glycan–protein interactions, opening up new perspectives for 19F‐labeled complex glycans.
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Affiliation(s)
- Giulio Fittolani
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany.,Department of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195, Berlin, Germany
| | - Elena Shanina
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany.,Department of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195, Berlin, Germany
| | - Mónica Guberman
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany.,Current address: Medicinal Chemistry, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle Strasse 10, 13125, Berlin, Germany
| | - Peter H Seeberger
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany.,Department of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195, Berlin, Germany
| | - Christoph Rademacher
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany.,Department of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195, Berlin, Germany.,Current address: Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse 14, 1080, Vienna, Austria.,Current address: Department of Microbiology, Immunobiology and Genetics, Max F. Perutz Labs, Campus Vienna Biocenter 5, 1030, Vienna, Austria
| | - Martina Delbianco
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany
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26
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Bi F, Zhang C, Yang G, Wang J, Zheng W, Hua Z, Li X, Wang Z, Chen G. Photoresponsive glyco-nanostructures integrated from supramolecular metallocarbohydrates for the reversible capture and release of lectins. Polym Chem 2021. [DOI: 10.1039/d1py00146a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Photo-controllable capture and release of proteins by glyco-nanostructures.
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Affiliation(s)
- Feihu Bi
- Biomass Molecular Engineering Center and Department of Materials Science and Engineering
- School of Forestry and Landscape Architecture
- Anhui Agricultural University
- Hefei
- China
| | - Changwei Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Guang Yang
- Biomass Molecular Engineering Center and Department of Materials Science and Engineering
- School of Forestry and Landscape Architecture
- Anhui Agricultural University
- Hefei
- China
| | - Jie Wang
- Biomass Molecular Engineering Center and Department of Materials Science and Engineering
- School of Forestry and Landscape Architecture
- Anhui Agricultural University
- Hefei
- China
| | - Wei Zheng
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Zan Hua
- Biomass Molecular Engineering Center and Department of Materials Science and Engineering
- School of Forestry and Landscape Architecture
- Anhui Agricultural University
- Hefei
- China
| | - Xiaopeng Li
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Zhongkai Wang
- Biomass Molecular Engineering Center and Department of Materials Science and Engineering
- School of Forestry and Landscape Architecture
- Anhui Agricultural University
- Hefei
- China
| | - Guosong Chen
- The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
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27
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Amponsah-Efah KK, Mistry P, Eisenhart R, Suryanarayanan R. The Influence of the Strength of Drug-Polymer Interactions on the Dissolution of Amorphous Solid Dispersions. Mol Pharm 2020; 18:174-186. [PMID: 33332132 DOI: 10.1021/acs.molpharmaceut.0c00790] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In an earlier report, ionic interactions between ketoconazole (KTZ), a weakly basic drug, and poly(acrylic acid) (PAA), an anionic polymer, resulted in a dramatic decrease in molecular mobility as well as reduced crystallization propensity of amorphous solid dispersion (ASD) in the solid state. On the other hand, weaker dipole-dipole interactions between KTZ and polyvinylpyrrolidone (PVP) resulted in ASDs with higher crystallization propensity (Mistry Mol Pharm., 2015, 12 (9), 3339-3350). In this work, we investigated the behavior of the ketoconazole (KTZ) solid dispersions in aqueous media. In vitro dissolution tests showed that the PAA ASD maintained the level of supersaturation for a longer duration than the PVP ASD at low polymer contents (4-20% w/w polymer). Additionally, the PAA ASDs were more resistant to drug crystallization in aqueous medium when measured with synchrotron X-ray diffractometry. Two-dimensional 1H nuclear Overhauser effect spectroscopy (NOESY) NMR cross peaks between ketoconazole and PAA confirmed the existence of drug-polymer interactions in D2O. The interaction was accompanied by a reduced drug diffusivity as monitored by 2D diffusion ordered spectroscopy (DOSY) NMR and enthalpy-driven when characterized by isothermal titration calorimetry (ITC). On the other hand, drug-polymer interactions were not detected between ketoconazole and PVP in aqueous solution, with NOESY, DOSY, or ITC. The results suggest that interactions that stabilize ASDs in the solid state can also be relevant and important in sustaining supersaturation in solution.
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Affiliation(s)
- Kweku K Amponsah-Efah
- Department of Pharmaceutics, College of Pharmacy, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, United States
| | - Pinal Mistry
- Department of Pharmaceutics, College of Pharmacy, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, United States
| | - Reed Eisenhart
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Raj Suryanarayanan
- Department of Pharmaceutics, College of Pharmacy, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, United States
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28
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Bertuzzi S, Gimeno A, Núñez‐Franco R, Bernardo‐Seisdedos G, Delgado S, Jiménez‐Osés G, Millet O, Jiménez‐Barbero J, Ardá A. Unravelling the Time Scale of Conformational Plasticity and Allostery in Glycan Recognition by Human Galectin-1. Chemistry 2020; 26:15643-15653. [PMID: 32780906 PMCID: PMC7756784 DOI: 10.1002/chem.202003212] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Indexed: 12/12/2022]
Abstract
The interaction of human galectin-1 with a variety of oligosaccharides, from di-(N-acetyllactosamine) to tetra-saccharides (blood B type-II antigen) has been scrutinized by using a combined approach of different NMR experiments, molecular dynamics (MD) simulations, and isothermal titration calorimetry. Ligand- and receptor-based NMR experiments assisted by computational methods allowed proposing three-dimensional structures for the different complexes, which explained the lack of enthalpy gain when increasing the chemical complexity of the glycan. Interestingly, and independently of the glycan ligand, the entropy term does not oppose the binding event, a rather unusual feature for protein-sugar interactions. CLEANEX-PM and relaxation dispersion experiments revealed that sugar binding affected residues far from the binding site and described significant changes in the dynamics of the protein. In particular, motions in the microsecond-millisecond timescale in residues at the protein dimer interface were identified in the presence of high affinity ligands. The dynamic process was further explored by extensive MD simulations, which provided additional support for the existence of allostery in glycan recognition by human galectin-1.
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Affiliation(s)
- Sara Bertuzzi
- Molecular Recognition and Host-Pathogen InteractionsCIC bioGUNEBasque Research and Technology Alliance, BRTABizkaia Technology Park, Building 80048162DerioBizkaiaSpain
| | - Ana Gimeno
- Molecular Recognition and Host-Pathogen InteractionsCIC bioGUNEBasque Research and Technology Alliance, BRTABizkaia Technology Park, Building 80048162DerioBizkaiaSpain
| | - Reyes Núñez‐Franco
- Molecular Recognition and Host-Pathogen InteractionsCIC bioGUNEBasque Research and Technology Alliance, BRTABizkaia Technology Park, Building 80048162DerioBizkaiaSpain
| | - Ganeko Bernardo‐Seisdedos
- Molecular Recognition and Host-Pathogen InteractionsCIC bioGUNEBasque Research and Technology Alliance, BRTABizkaia Technology Park, Building 80048162DerioBizkaiaSpain
| | - Sandra Delgado
- Molecular Recognition and Host-Pathogen InteractionsCIC bioGUNEBasque Research and Technology Alliance, BRTABizkaia Technology Park, Building 80048162DerioBizkaiaSpain
| | - Gonzalo Jiménez‐Osés
- Molecular Recognition and Host-Pathogen InteractionsCIC bioGUNEBasque Research and Technology Alliance, BRTABizkaia Technology Park, Building 80048162DerioBizkaiaSpain
| | - Oscar Millet
- Molecular Recognition and Host-Pathogen InteractionsCIC bioGUNEBasque Research and Technology Alliance, BRTABizkaia Technology Park, Building 80048162DerioBizkaiaSpain
| | - Jesús Jiménez‐Barbero
- Molecular Recognition and Host-Pathogen InteractionsCIC bioGUNEBasque Research and Technology Alliance, BRTABizkaia Technology Park, Building 80048162DerioBizkaiaSpain
- Ikerbasque—Basque Foundation for Science48013BilbaoBizkaiaSpain
- Department of Organic Chemistry IIUPV/EHUUniversity of the Basque Country48940LeioaBizkaiaSpain
| | - Ana Ardá
- Molecular Recognition and Host-Pathogen InteractionsCIC bioGUNEBasque Research and Technology Alliance, BRTABizkaia Technology Park, Building 80048162DerioBizkaiaSpain
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29
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Yadav S, Naresh K, Jayaraman N. Surface Ligand Density Switches Glycovesicles between Monomeric and Multimeric Lectin Recognition. Chembiochem 2020; 22:485-490. [PMID: 32926592 DOI: 10.1002/cbic.202000544] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/04/2020] [Indexed: 11/07/2022]
Abstract
Carbohydrate-protein interactions define a multitude of cellular recognition events. We present herein synthetic glycovesicles as cell-surface mimics in order to switch the nature of lectin recognition. The covalent glycovesicles, constituted with diacetylene monomers of various ligand densities at their surfaces, are prepared through photo-polymerization. Vesicles with sparsely imbedded ligands engage in a lectin interaction leading to the formation of a dense, crosslinked multimeric complex. On the other hand, vesicles with many ligands, or completely covered with them, switch the lectin interaction to form a fully soluble monomeric complex, without crosslinking. Nanomolar dissociation constants govern these interactions, as assessed by a ligand-displacement assay. The study demonstrates the switching nature - between monomeric and multimeric - of the interaction as a function of ligand density in the vesicles; the results are directly relevant to understanding such a phenomenon occurring at cell surfaces.
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Affiliation(s)
- Shivender Yadav
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Kottari Naresh
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India.,Present address: HP Green R&D Centre, KIADB Industrial Area, Bangalore, 560 067, India
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30
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Abstract
The conformation of a molecule strongly affects its function, as demonstrated for peptides and nucleic acids. This correlation is much less established for carbohydrates, the most abundant organic materials in nature. Recent advances in synthetic and analytical techniques have enabled the study of carbohydrates at the molecular level. Recurrent structural features were identified as responsible for particular biological activities or material properties. In this Minireview, recent achievements in the structural characterization of carbohydrates, enabled by systematic studies of chemically defined oligosaccharides, are discussed. These findings can guide the development of more potent glycomimetics. Synthetic carbohydrate materials by design can be envisioned.
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Affiliation(s)
- Yang Yu
- Department of Biomolecular SystemsMax-Planck-Institute of Colloids and InterfacesAm Mühlenberg 114476PotsdamGermany
- Department of Chemistry and BiochemistryFreie Universität BerlinArnimallee 2214195BerlinGermany
| | - Martina Delbianco
- Department of Biomolecular SystemsMax-Planck-Institute of Colloids and InterfacesAm Mühlenberg 114476PotsdamGermany
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31
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Paul TJ, Strzelczyk AK, Feldhof MI, Schmidt S. Temperature-Switchable Glycopolymers and Their Conformation-Dependent Binding to Receptor Targets. Biomacromolecules 2020; 21:2913-2921. [DOI: 10.1021/acs.biomac.0c00676] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tanja J. Paul
- Institute of Organic and Macromolecular Chemistry, Heinrich-Heine-University Düsseldorf, Universitätsstraße 1, Dusseldorf 40225, Germany
| | - Alexander K. Strzelczyk
- Institute of Organic and Macromolecular Chemistry, Heinrich-Heine-University Düsseldorf, Universitätsstraße 1, Dusseldorf 40225, Germany
| | - Melina I. Feldhof
- Institute of Organic and Macromolecular Chemistry, Heinrich-Heine-University Düsseldorf, Universitätsstraße 1, Dusseldorf 40225, Germany
| | - Stephan Schmidt
- Institute of Organic and Macromolecular Chemistry, Heinrich-Heine-University Düsseldorf, Universitätsstraße 1, Dusseldorf 40225, Germany
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32
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Exopolysaccharides from yoghurt fermented by Lactobacillus paracasei: Production, purification and its binding to sodium caseinate. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2019.105635] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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33
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LecB, a High Affinity Soluble Fucose-Binding Lectin from Pseudomonas aeruginosa. Methods Mol Biol 2020. [PMID: 32306354 DOI: 10.1007/978-1-0716-0430-4_46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
LecB/PA-IIL (Pfam PF07472) from bacterium Pseudomonas aeruginosa is a fucose-binding lectin with unusual high affinity for glycans. The occurrence of LecB and related proteins is limited to few opportunistic bacterial species, some of them being responsible for severe infections in immune-compromised patients. This lectin is therefore of interest as a target for the design of anti-infectious compounds, but can also be used for research and biotechnology. LecB is a small protein that can be produced in good quantity in recombinant system and purified by affinity chromatography.
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34
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Gai P, Yu W, Zhao H, Qi R, Li F, Liu L, Lv F, Wang S. Solar‐Powered Organic Semiconductor–Bacteria Biohybrids for CO
2
Reduction into Acetic Acid. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001047] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Panpan Gai
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- College of Chemistry and Pharmaceutical SciencesQingdao Agricultural University Qingdao 266109 P. R. China
| | - Wen Yu
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- College of Chemistry and Pharmaceutical SciencesQingdao Agricultural University Qingdao 266109 P. R. China
| | - Hao Zhao
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- College of ChemistryUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Ruilian Qi
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
| | - Feng Li
- College of Chemistry and Pharmaceutical SciencesQingdao Agricultural University Qingdao 266109 P. R. China
| | - Libing Liu
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
| | - Fengting Lv
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
| | - Shu Wang
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- College of ChemistryUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
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35
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Gai P, Yu W, Zhao H, Qi R, Li F, Liu L, Lv F, Wang S. Solar-Powered Organic Semiconductor-Bacteria Biohybrids for CO 2 Reduction into Acetic Acid. Angew Chem Int Ed Engl 2020; 59:7224-7229. [PMID: 32065712 DOI: 10.1002/anie.202001047] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Indexed: 01/17/2023]
Abstract
An organic semiconductor-bacteria biohybrid photosynthetic system is used to efficiently realize CO2 reduction to produce acetic acid with the non-photosynthetic bacteria Moorella thermoacetica. Perylene diimide derivative (PDI) and poly(fluorene-co-phenylene) (PFP) were coated on the bacteria surface as photosensitizers to form a p-n heterojunction (PFP/PDI) layer, affording higher hole/electron separation efficiency. The π-conjugated semiconductors possess excellent light-harvesting ability and biocompatibility, and the cationic side chains of organic semiconductors could intercalate into cell membranes, ensuring efficient electron transfer to bacteria. Moorella thermoacetica can thus harvest photoexcited electrons from the PFP/PDI heterojunction, driving the Wood-Ljungdahl pathway to synthesize acetic acid from CO2 under illumination. The efficiency of this organic biohybrid is about 1.6 %, which is comparable to those of reported inorganic biohybrid systems.
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Affiliation(s)
- Panpan Gai
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, P. R. China
| | - Wen Yu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, P. R. China
| | - Hao Zhao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,College of Chemistry, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ruilian Qi
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Feng Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, P. R. China
| | - Libing Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Fengting Lv
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Shu Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,College of Chemistry, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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36
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Martos-Maldonado MC, Quesada-Soriano I, García-Fuentes L, Vargas-Berenguel A. Multivalent Lactose-Ferrocene Conjugates Based on Poly (Amido Amine) Dendrimers and Gold Nanoparticles as Electrochemical Probes for Sensing Galectin-3. NANOMATERIALS 2020; 10:nano10020203. [PMID: 31991555 PMCID: PMC7074905 DOI: 10.3390/nano10020203] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/16/2020] [Accepted: 01/19/2020] [Indexed: 12/17/2022]
Abstract
Galectin-3 is considered a cancer biomarker and bioindicator of fibrosis and cardiac remodeling and, therefore, it is desirable to develop convenient methods for its detection. Herein, an approach based on the development of multivalent electrochemical probes with high galectin-3 sensing abilities is reported. The probes consist of multivalent presentations of lactose–ferrocene conjugates scaffolded on poly (amido amine) (PAMAM) dendrimers and gold nanoparticles. Such multivalent lactose–ferrocene conjugates are synthesized by coupling of azidomethyl ferrocene–lactose building blocks on alkyne-functionalized PAMAM, for the case of the glycodendrimers, and to disulfide-functionalized linkers that are then used for the surface modification of citrate-stabilized gold nanoparticles. The binding and sensing abilities toward galectin-3 of both ferrocene-containing lactose dendrimers and gold nanoparticles have been evaluated by means of isothermal titration calorimetry, UV–vis spectroscopy, and differential pulse voltammetry. The highest sensitivity by electrochemical methods to galectin-3 was shown by lactosylferrocenylated gold nanoparticles, which are able to detect the lectin in nanomolar concentrations.
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37
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Miura Y, Seto H, Shibuya M, Hoshino Y. Biopolymer monolith for protein purification. Faraday Discuss 2019; 219:154-167. [PMID: 31313794 DOI: 10.1039/c9fd00018f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Porous glycopolymers, "glycomonoliths", were prepared by radical polymerization based on polymerization-induced phase separation with an acrylamide derivative of α-mannose, acrylamide and cross-linker in order to investigate protein adsorption and separation. The porous structure was induced by a porogenic alcohol. The pore diameter and surface area were controlled by the type of alcohol. The protein adsorption was measured in both batch and continuous flow systems. The glycomonoliths showed specific interaction with the sugar recognition protein of concanavalin A, and non-specific interaction to other proteins was negligible. The amount of protein adsorption to the materials was determined by the sugar density and the composition of the glycomonoliths. Fundamental knowledge regarding the glycomonoliths for protein separation was obtained.
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Affiliation(s)
- Yoshiko Miura
- Department of Chemical Engineering, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
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38
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Martínez-Bailén M, Galbis E, Carmona AT, de-Paz MV, Robina I. Preparation of water-soluble glycopolymers derived from five-membered iminosugars. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.07.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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39
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Cutrone G, Li X, Casas-Solvas JM, Menendez-Miranda M, Qiu J, Benkovics G, Constantin D, Malanga M, Moreira-Alvarez B, Costa-Fernandez JM, García-Fuentes L, Gref R, Vargas-Berenguel A. Design of Engineered Cyclodextrin Derivatives for Spontaneous Coating of Highly Porous Metal-Organic Framework Nanoparticles in Aqueous Media. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1103. [PMID: 31374940 PMCID: PMC6723150 DOI: 10.3390/nano9081103] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 07/29/2019] [Accepted: 07/30/2019] [Indexed: 12/14/2022]
Abstract
Nanosized metal-organic frameworks (nanoMOFs) MIL-100(Fe) are highly porous and biodegradable materials that have emerged as promising drug nanocarriers. A challenging issue concerns their surface functionalization in order to evade the immune system and to provide molecular recognition ability, so that they can be used for specific targeting. A convenient method for their coating with tetraethylene glycol, polyethylene glycol, and mannose residues is reported herein. The method consists of the organic solvent-free self-assembly on the nanoMOFs of building blocks based on β-cyclodextrin facially derivatized with the referred functional moieties, and multiple phosphate groups to anchor to the nanoparticles' surface. The coating of nanoMOFs with cyclodextrin phosphate without further functional groups led to a significant decrease of macrophage uptake, slightly improved by polyethylene glycol or mannose-containing cyclodextrin phosphate coating. More notably, nanoMOFs modified with tetraethylene glycol-containing cyclodextrin phosphate displayed the most efficient "stealth" effect. Mannose-coated nanoMOFs displayed a remarkably enhanced binding affinity towards a specific mannose receptor, such as Concanavalin A, due to the multivalent display of the monosaccharide, as well as reduced macrophage internalization. Coating with tetraethylente glycol of nanoMOFs after loading with doxorubicin is also described. Therefore, phosphorylated cyclodextrins offer a versatile platform to coat nanoMOFs in an organic solvent-free, one step manner, providing them with new biorecognition and/or "stealth" properties.
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Affiliation(s)
- Giovanna Cutrone
- Department of Chemistry and Physics, University of Almería, Crta. de Sacramento s/n, E-04120 Almería, Spain
| | - Xue Li
- Institut des Sciences Moléculaires d'Orsay, UMR CNRS 8214, Université Paris-Sud, Université Paris Saclay, 91400 Orsay, France
| | - Juan M Casas-Solvas
- Department of Chemistry and Physics, University of Almería, Crta. de Sacramento s/n, E-04120 Almería, Spain
| | - Mario Menendez-Miranda
- Institut des Sciences Moléculaires d'Orsay, UMR CNRS 8214, Université Paris-Sud, Université Paris Saclay, 91400 Orsay, France
| | - Jingwen Qiu
- Institut des Sciences Moléculaires d'Orsay, UMR CNRS 8214, Université Paris-Sud, Université Paris Saclay, 91400 Orsay, France
| | | | - Doru Constantin
- Laboratoire de Physique des Solides, UMR 8502, Université Paris-Sud, 91405 Orsay, France
| | - Milo Malanga
- CycloLab R&D Ltd., Illatos út 7, H-1097 Budapest, Hungary
| | - Borja Moreira-Alvarez
- Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
| | - José M Costa-Fernandez
- Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
| | - Luis García-Fuentes
- Department of Chemistry and Physics, University of Almería, Crta. de Sacramento s/n, E-04120 Almería, Spain
| | - Ruxandra Gref
- Institut des Sciences Moléculaires d'Orsay, UMR CNRS 8214, Université Paris-Sud, Université Paris Saclay, 91400 Orsay, France.
| | - Antonio Vargas-Berenguel
- Department of Chemistry and Physics, University of Almería, Crta. de Sacramento s/n, E-04120 Almería, Spain.
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40
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Paul TJ, Rübel S, Hildebrandt M, Strzelczyk AK, Spormann C, Lindhorst TK, Schmidt S. Thermosensitive Display of Carbohydrate Ligands on Microgels for Switchable Binding of Proteins and Bacteria. ACS APPLIED MATERIALS & INTERFACES 2019; 11:26674-26683. [PMID: 31282142 DOI: 10.1021/acsami.9b08537] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The synthesis of carbohydrate-functionalized thermosensitive poly(N-isopropylacrylamide) microgels and their ability to bind carbohydrate-binding pathogens upon temperature switch are reported. It is found that the microgels' binding affinity is increased above their lower critical solution temperature (LCST), enabling thermo-triggerable capture of pathogens. Here, a series of microgels with comparatively low mannose functionalization degrees below 1 mol % is achieved by a single polymerization step. Upon increase in mannose density, the microgel size increases, and the LCST decreases to 26 °C. Clustering with concanavalin A indicated that binding affinity is enhanced by a higher mannose content and by raising the temperature above the LCST. Binding studies with Escherichia coli confirm stronger specific interactions above the LCST and formation of mechanically stable aggregates enabling efficient separation of E. coli by filtration. For small incubation times above the LCST, the microgels' potential to release pathogens again below the LCST is confirmed also. Compared to existing switchable scaffolds, microgels nearly entirely composed of a thermosensitive material undergo a large change in volume, which allows them to drastically vary the density of ligands to switch between capture and release. This straightforward yet novel approach is likely compatible with a broad range of bioactive ligands. Therefore, thermosensitive microgels represent a promising platform for the specific capture or release of cells or pathogens.
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Affiliation(s)
- Tanja J Paul
- Institute of Organic and Macromolecular Chemistry , Heinrich-Heine-University Düsseldorf , Universitätsstraße 1 , 40225 Düsseldorf , Germany
| | - Sophie Rübel
- Institute of Organic and Macromolecular Chemistry , Heinrich-Heine-University Düsseldorf , Universitätsstraße 1 , 40225 Düsseldorf , Germany
| | - Marco Hildebrandt
- Institute of Organic and Macromolecular Chemistry , Heinrich-Heine-University Düsseldorf , Universitätsstraße 1 , 40225 Düsseldorf , Germany
| | - Alexander K Strzelczyk
- Institute of Organic and Macromolecular Chemistry , Heinrich-Heine-University Düsseldorf , Universitätsstraße 1 , 40225 Düsseldorf , Germany
| | - Carina Spormann
- Otto Diels Institute of Organic Chemistry , Christiana Albertina University of Kiel , Otto-Hahn-Platz 3/4 , 24098 Kiel , Germany
| | - Thisbe K Lindhorst
- Otto Diels Institute of Organic Chemistry , Christiana Albertina University of Kiel , Otto-Hahn-Platz 3/4 , 24098 Kiel , Germany
| | - Stephan Schmidt
- Institute of Organic and Macromolecular Chemistry , Heinrich-Heine-University Düsseldorf , Universitätsstraße 1 , 40225 Düsseldorf , Germany
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41
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Kitov PI, Kitova EN, Han L, Li Z, Jung J, Rodrigues E, Hunter CD, Cairo CW, Macauley MS, Klassen JS. A quantitative, high-throughput method identifies protein-glycan interactions via mass spectrometry. Commun Biol 2019; 2:268. [PMID: 31341967 PMCID: PMC6646405 DOI: 10.1038/s42003-019-0507-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 06/11/2019] [Indexed: 01/08/2023] Open
Abstract
Glycan binding by glycan-binding proteins and processing by carbohydrate-active enzymes is implicated in physiological and pathophysiological processes. Comprehensive mapping of glycan interactions is essential to understanding of glycan-mediated biology and can guide the development of new diagnostics and therapeutics. Here, we introduce the competitive universal proxy receptor assay (CUPRA), which combines electrospray ionization mass spectrometry, competitive binding and heterobifunctional glycan-based ligands to give a quantitative high-throughput method for screening glycan libraries against glycan-binding and glycan-processing proteins. Application of the assay to human (siglec-2), plant (Sambucus nigra and Maackia amurensis lectins) and bacterial (cholera toxin, and family 51 carbohydrate binding module) proteins allowed for the identification of ligands with affinities (Kd) ≤ 1 mM. The assay is unprecedentedly versatile and can be applied to natural libraries and, when implemented in a time-resolved manner, provides a quantitative measure of the activities and substrate specificity of carbohydrate-active enzymes.
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Affiliation(s)
- Pavel I. Kitov
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada
| | - Elena N. Kitova
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada
| | - Ling Han
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada
| | - Zhixiong Li
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada
| | - Jaesoo Jung
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada
| | - Emily Rodrigues
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada
| | - Carmanah D. Hunter
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada
| | - Christopher W. Cairo
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada
| | - Matthew S. Macauley
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, AB T6G 2E1 Canada
| | - John S. Klassen
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada
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42
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Denavit V, Lainé D, Bouzriba C, Shanina E, Gillon É, Fortin S, Rademacher C, Imberty A, Giguère D. Stereoselective Synthesis of Fluorinated Galactopyranosides as Potential Molecular Probes for Galactophilic Proteins: Assessment of Monofluorogalactoside-LecA Interactions. Chemistry 2019; 25:4478-4490. [PMID: 30690814 DOI: 10.1002/chem.201806197] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Indexed: 11/07/2022]
Abstract
The replacement of hydroxyl groups by fluorine atoms on hexopyranoside scaffolds may allow access to invaluable tools for studying various biochemical processes. As part of ongoing activities toward the preparation of fluorinated carbohydrates, a systematic investigation involving the synthesis and biological evaluation of a series of mono- and polyfluorinated galactopyranosides is described. Various monofluorogalactopyranosides, a trifluorinated, and a tetrafluorinated galactopyranoside have been prepared using a Chiron approach. Given the scarcity of these compounds in the literature, in addition to their synthesis, their biological profiles were evaluated. Firstly, the fluorinated compounds were investigated as antiproliferative agents using normal human and mouse cells in comparison with cancerous cells. Most of the fluorinated compounds showed no antiproliferative activity. Secondly, these carbohydrate probes were used as potential inhibitors of galactophilic lectins. The first transverse relaxation-optimized spectroscopy (TROSY) NMR experiments were performed on these interactions, examining chemical shift perturbations of the backbone resonances of LecA, a virulence factor from Pseudomonas aeruginosa. Moreover, taking advantage of the fluorine atom, the 19 F NMR resonances of the monofluorogalactopyranosides were directly monitored in the presence and absence of LecA to assess ligand binding. Lastly, these results were corroborated with the binding potencies of the monofluorinated galactopyranoside derivatives by isothermal titration calorimetry experiments. Analogues with fluorine atoms at C-3 and C-4 showed weaker affinities with LecA as compared to those with the fluorine atom at C-2 or C-6. This research has focused on the chemical synthesis of "drug-like" low-molecular-weight inhibitors that circumvent drawbacks typically associated with natural oligosaccharides.
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Affiliation(s)
- Vincent Denavit
- Département de Chimie, PROTEO, RQRM, Université Laval, 1045 Avenue de la Médecine, Quebec City, QC, G1V 0A6, Canada
| | - Danny Lainé
- Département de Chimie, PROTEO, RQRM, Université Laval, 1045 Avenue de la Médecine, Quebec City, QC, G1V 0A6, Canada
| | - Chahrazed Bouzriba
- Oncology Division, Hôpital Saint-François d'Assise, CHU de Québec-Université Laval Research Center, 10 rue de l'Espinay, Quebec City, QC, G1L 3L5, Canada
- Faculté de Pharmacie, Université Laval, Quebec City, QC, G1V 0A6, Canada
| | - Elena Shanina
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14424, Potsdam, Germany
| | - Émilie Gillon
- Univ. Grenoble Alpes, CNRS, CERMAV, 38000, Grenoble, France
| | - Sébastien Fortin
- Oncology Division, Hôpital Saint-François d'Assise, CHU de Québec-Université Laval Research Center, 10 rue de l'Espinay, Quebec City, QC, G1L 3L5, Canada
- Faculté de Pharmacie, Université Laval, Quebec City, QC, G1V 0A6, Canada
| | - Christoph Rademacher
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14424, Potsdam, Germany
| | - Anne Imberty
- Univ. Grenoble Alpes, CNRS, CERMAV, 38000, Grenoble, France
| | - Denis Giguère
- Département de Chimie, PROTEO, RQRM, Université Laval, 1045 Avenue de la Médecine, Quebec City, QC, G1V 0A6, Canada
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Boden S, Reise F, Kania J, Lindhorst TK, Hartmann L. Sequence-Defined Introduction of Hydrophobic Motifs and Effects in Lectin Binding of Precision Glycomacromolecules. Macromol Biosci 2019; 19:e1800425. [PMID: 30707496 DOI: 10.1002/mabi.201800425] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 01/11/2019] [Indexed: 12/11/2022]
Abstract
This study investigates the influence of an increasingly hydrophobic backbone of multivalent glycomimetics based on sequence-defined oligo(amidoamines) on their resulting affinity toward bacterial lectins. Glycomacromolecules are obtained by stepwise assembly of tailor-made building blocks on solid support, using both hydrophobic aliphatic and aromatic building blocks to enable a gradual change in hydrophobicity of the backbone. Their binding behavior toward model lectin Concanavalin A (ConA) is evaluated using isothermal titration calorimetry (ITC) and surface plasmon resonance (SPR) showing higher affinities for glycomacromolecules with higher content of hydrophobic and aromatic moieties in the backbone. Finally, glycomacromolecules are tested in a bacterial adhesion inhibition study against Escherichia coli where more hydrophobic backbones yield higher inhibitory potentials most likely due to additional secondary interactions with hydrophobic regions of the protein receptor as well as a change in conformation exposing carbohydrate ligands for increased binding. Overall, the results highlight the influence and thereby importance of the polymer backbone itself on the resulting properties of polymeric biomimetics.
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Affiliation(s)
- Sophia Boden
- Institute of Organic and Macromolecular Chemistry, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - Franziska Reise
- Otto Diels Institute of Organic Chemistry, Christiana Albertina University of Kiel, Otto-Hahn-Platz 3-4, 24118, Kiel, Germany
| | - Jessica Kania
- Institute of Organic and Macromolecular Chemistry, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - Thisbe K Lindhorst
- Otto Diels Institute of Organic Chemistry, Christiana Albertina University of Kiel, Otto-Hahn-Platz 3-4, 24118, Kiel, Germany
| | - Laura Hartmann
- Institute of Organic and Macromolecular Chemistry, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany
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44
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Ma Z, Zhu XX. Copolymers containing carbohydrates and other biomolecules: design, synthesis and applications. J Mater Chem B 2019; 7:1361-1378. [DOI: 10.1039/c8tb03162b] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review highlights recent progress in random and block copolymers containing sugar and other biocompounds, including their design, synthesis, properties and selected applications.
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Affiliation(s)
- Zhiyuan Ma
- Département de Chimie
- Université de Montréal
- Montreal
- Canada
| | - X. X. Zhu
- Département de Chimie
- Université de Montréal
- Montreal
- Canada
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45
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Zhu C, Gong S, Ding J, Yu M, Ahmad E, Feng Y, Gan Y. Supersaturated polymeric micelles for oral silybin delivery: the role of the Soluplus-PVPVA complex. Acta Pharm Sin B 2019; 9:107-117. [PMID: 30766782 PMCID: PMC6361729 DOI: 10.1016/j.apsb.2018.09.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 07/12/2018] [Accepted: 07/30/2018] [Indexed: 02/06/2023] Open
Abstract
Increasing the degree of supersaturation of drugs and maintaining their proper stability are very important in improving the oral bioavailability of poorly soluble drugs by a supersaturated drug delivery system (SDDS). In this study, we reported a complex system of Soluplus–Copovidone (Soluplus–PVPVA) loaded with the model drug silybin (SLB) that could not only maintain the stability of a supersaturated solution but also effectively promote oral absorption. The antiprecipitation effect of the polymers on SLB was observed using the solvent-shift method. In addition, the effects of the polymers on absorption were detected by cellular uptake and transport experiments. The mechanisms by which the Soluplus–PVPVA complex promotes oral absorption were explored by dynamic light scattering, transmission electron microscopy, fluorescence spectra and isothermal titration calorimetry analyses. Furthermore, a pharmacokinetic study in rats was used to demonstrate the advantages of the Soluplus–PVPVA complex. The results showed that Soluplus and PVPVA spontaneously formed complexes in aqueous solution via the adsorption of PVPVA on the hydrophilic-hydrophobic interface of the Soluplus micelle, and the Soluplus–PVPVA complex significantly increased the absorption of SLB. In conclusion, the Soluplus–PVPVA complex is a potential SDDS for improving the bioavailability of hydrophobic drugs.
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Affiliation(s)
- Chunliu Zhu
- Engineering Research Center of Modern Preparation Technology of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
- Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai 201203, China
| | - Shuang Gong
- Xiangya School of Pharmaceutical Science, Central South University, Changsha 410000, China
- Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai 201203, China
| | - Jinsong Ding
- Xiangya School of Pharmaceutical Science, Central South University, Changsha 410000, China
| | - Miaorong Yu
- Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai 201203, China
| | - Ejaj Ahmad
- Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai 201203, China
| | - Yi Feng
- Engineering Research Center of Modern Preparation Technology of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
- Corresponding authors.
| | - Yong Gan
- Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai 201203, China
- Corresponding authors.
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Portier F, Imberty A, Halila S. Expeditious Synthesis of C-Glycosyl Barbiturate Ligands of Bacterial Lectins: From Monomer Design to Glycoclusters and Glycopolymers. Bioconjug Chem 2018; 30:647-656. [DOI: 10.1021/acs.bioconjchem.8b00847] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- François Portier
- Université Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France
- Université Grenoble Alpes, CNRS, CEA, INAC, SyMMES, 38000 Grenoble, France
| | - Anne Imberty
- Université Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France
| | - Sami Halila
- Université Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France
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47
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Specificity and mechanism of carbohydrate demethylation by cytochrome P450 monooxygenases. Biochem J 2018; 475:3875-3886. [PMID: 30404923 PMCID: PMC6292453 DOI: 10.1042/bcj20180762] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 11/02/2018] [Accepted: 11/06/2018] [Indexed: 01/21/2023]
Abstract
Degradation of carbohydrates by bacteria represents a key step in energy metabolism that can be inhibited by methylated sugars. Removal of methyl groups, which is critical for further processing, poses a biocatalytic challenge because enzymes need to overcome a high energy barrier. Our structural and computational analysis revealed how a member of the cytochrome P450 family evolved to oxidize a carbohydrate ligand. Using structural biology, we ascertained the molecular determinants of substrate specificity and revealed a highly specialized active site complementary to the substrate chemistry. Invariance of the residues involved in substrate recognition across the subfamily suggests that they are critical for enzyme function and when mutated, the enzyme lost substrate recognition. The structure of a carbohydrate-active P450 adds mechanistic insight into monooxygenase action on a methylated monosaccharide and reveals the broad conservation of the active site machinery across the subfamily.
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48
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Leyva E, Medrano-Cerano JL, Cano-Sánchez P, López-González I, Gómez-Velasco H, del Río-Portilla F, García-Hernández E. Bacterial expression, purification and biophysical characterization of wheat germ agglutinin and its four hevein-like domains. Biopolymers 2018; 110:e23242. [DOI: 10.1002/bip.23242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 10/25/2018] [Accepted: 11/07/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Eduardo Leyva
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Jorge L. Medrano-Cerano
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Patricia Cano-Sánchez
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Itzel López-González
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Homero Gómez-Velasco
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Federico del Río-Portilla
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Enrique García-Hernández
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
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Probing the bilayer-monolayer switching of capping agents on Au nanorods and its interaction with guest molecules
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§. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1550-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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