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Banerjee S, Naresh M, Swamy MJ. Effect of temperature and pH on the structure and stability of tumor-specific lectin jacalin and insights into the location of its tryptophan residues: CD, DSC and fluorescence studies. Int J Biol Macromol 2024; 260:129451. [PMID: 38232886 DOI: 10.1016/j.ijbiomac.2024.129451] [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: 08/07/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/19/2024]
Abstract
Jacalin, the jackfruit seed lectin, exhibits high specificity for the tumor-specific T-antigen and is used in various biomedical and biotechnological applications. Here, we report biophysical studies on the thermal unfolding of jacalin and the effect of pH and temperature on its secondary structure. Differential scanning calorimetric (DSC) studies revealed that native jacalin unfolds at ∼60 °C and that carbohydrate binding stabilizes the protein structure. Circular dichroism spectroscopic studies indicated that the secondary structure of jacalin remains mostly unaffected over pH 2.0-9.0, whereas considerable changes were observed in the tertiary structure. DSC experiments demonstrated that jacalin exhibits two overlapping transitions between pH 2 and 5, which could be attributed to dissociation of the tetrameric protein into subunits and their unfolding. Interestingly, only one transition between pH 6 and 9 was observed, suggesting that the subunit dissociation and unfolding occur simultaneously. While quenching of the protein intrinsic fluorescence by acrylamide increased significantly upon carbohydrate binding, quenching by succinimide is essentially unaffected. We attribute this difference to increased exposure of Trp-123 in the α-chain as it is involved in carbohydrate binding. Both acrylamide and succinimide gave biphasic Stern-Volmer plots, consistent with differential accessibility of the two tryptophan residues of jacalin to them.
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Affiliation(s)
- Sneha Banerjee
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - Madarapu Naresh
- Polymers and Functional Materials Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Musti J Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India.
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Petrova L, Gergov N, Stoup M, Zapryanova S, Van Damme EJM, Lebègue N, Liberelle M, Zasheva D, Bogoeva V. Jacalin-Curcumin Complex Sensitizes the Breast Cancer MDA-MB-231 Cell Line. Int J Mol Sci 2023; 24:17399. [PMID: 38139227 PMCID: PMC10743388 DOI: 10.3390/ijms242417399] [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: 11/22/2023] [Revised: 12/05/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
Protein-drug interactions are crucial for understanding drug delivery and cell functions. Jacalin is a suitable molecule for such targeting, as it specifically recognizes the tumor-associated Thomsen-Friedenreich (TF) antigen that is expressed on the glycosylated proteins in cancer cells. The present paper describes the interaction of curcumin and jacalin, a possible carrier molecule for the delivery of antitumor drugs due to its ability to recognize tumor cells. Our results have shown that both steady-state fluorescence and fluorescent labelling of jacalin are two reliable methods to determine jacalin-curcumin interactions. The affinity of jacalin for curcumin is consistently within the micromolar range (using fluorescence and microscale thermophoresis) showing high-affinity binding of the complex. In vitro experiments on triple-negative breast cancer MDA-MB-231 cells indicated inhibition of cell growth after treating with the jacalin-curcumin complex for 48 h. The cell survival fraction was significantly reduced to 50% after combined treatment. In this paper, we report for the first time about the jacalin-curcumin interaction. We quantified this unique biomolecular interaction and gathered additional information on the binding event. We observed that the jacalin-curcumin complex inhibits the proliferation of the triple-negative breast cancer MDA-MB-231 cells.
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Affiliation(s)
- Lidiya Petrova
- Department of Biology, Medical University—Pleven, “St. Kliment Ohridski” Str. 1, 5800 Pleven, Bulgaria;
| | - Nikolay Gergov
- Institute of Molecular Biology “Rumen Tzanev”, Bulgarian Academy of Sciences, “Acad. George Bonchev” Str., Bl. 21, 1113 Sofia, Bulgaria;
| | - Marie Stoup
- School of Pharmacy, University Lille, Inserm, CHU Lille, UMR-S 1172–LiNC–Lille Neuroscience and Cognition, F-59000 Lille, France; (M.S.); (N.L.); (M.L.)
| | - Silvina Zapryanova
- Institute of Biology and Immunology of Reproduction, Bulgarian Academy of Sciences, Tsarigradsko Shosse, 73, 1113 Sofia, Bulgaria; (S.Z.); (D.Z.)
| | - Els J. M. Van Damme
- Department Biotechnology, Ghent University, Proeftuinstraat 86, 9000 Gent, Belgium;
| | - Nicolas Lebègue
- School of Pharmacy, University Lille, Inserm, CHU Lille, UMR-S 1172–LiNC–Lille Neuroscience and Cognition, F-59000 Lille, France; (M.S.); (N.L.); (M.L.)
| | - Maxime Liberelle
- School of Pharmacy, University Lille, Inserm, CHU Lille, UMR-S 1172–LiNC–Lille Neuroscience and Cognition, F-59000 Lille, France; (M.S.); (N.L.); (M.L.)
| | - Diana Zasheva
- Institute of Biology and Immunology of Reproduction, Bulgarian Academy of Sciences, Tsarigradsko Shosse, 73, 1113 Sofia, Bulgaria; (S.Z.); (D.Z.)
| | - Vanya Bogoeva
- Institute of Molecular Biology “Rumen Tzanev”, Bulgarian Academy of Sciences, “Acad. George Bonchev” Str., Bl. 21, 1113 Sofia, Bulgaria;
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Arekal RN, J S, Kumar A, B S G, M S D. Structural and functional analysis of a novel galactose-binding lectin derived from Chlorella sorokiniana MW769776. J Biomol Struct Dyn 2023:1-11. [PMID: 37904546 DOI: 10.1080/07391102.2023.2274519] [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: 07/18/2023] [Accepted: 10/16/2023] [Indexed: 11/01/2023]
Abstract
A freshwater green microalgal strain was isolated and the lectin was identified in it by a strong hemagglutination activity (HA) assay. Characterization of the algal strain was found to be Chlorella sorokiniana (MW769776). A single step affinity chromatographic technique was developed to purify Chlorella sorokiniana lectin (CSL) using guar gum as the affinity matrix. The precipitate showed a single active peak with a titer value of 1024 HU, with a concentration of 1111 U, and a purification fold of 9. The purified protein exhibited a single band in SDS-PAGE with a molecular weight of 16 kDa. Analysis by liquid chromatography-electrospray ionization-quadrupole-time of flight mass spectrometry (LC-ESI-Q-TOF-MS) of tryptic-digested purified lectin showed that it was a monomeric protein. A multiple sequence alignment analysis revealed that the peptide sequences of CSL exhibited similarity with the H-type lectin domain of Micractinium conductrix. The structure of CSL was studied by FTIR and homology modeling methods, indicating the presence of α-helix as well as β-sheet in its secondary structure. Whereas the 3D structure exhibited the similarity with the core protein of light-harvesting reaction center complex of photosystem I. The significance of this study suggests that the characteristics of CSL are consistent with its identification as a hemagglutinin, a type of novel lectin, which suggests its candidature for various biological purposes.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Roopashri N Arekal
- Department of Microbiology, Biotechnology and Food Technology, Bangalore University, Bengaluru, India
| | - Savitha J
- Department of Microbiology, Biotechnology and Food Technology, Bangalore University, Bengaluru, India
| | - Ashwini Kumar
- Department of Microbiology, Genei Lab Pvt Ltd, Bengaluru, India
| | - Gunashree B S
- Department of Microbiology, Mangalore University, Kodagu, India
| | - Divyashree M S
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India
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Fernanda Alves Mariano Soares de Farias M, Leite de Siqueira Patriota L, Bernadete de Souza Lira C, Maria de Souza Aguiar L, Rafaela da Silva Barros B, Maria Guedes Paiva P, Moutinho Lagos de Melo C, Diniz de Lima Santos N, Henrique Napoleão T. Purification, characterization, and immunomodulatory activity of a lectin from the seeds of horse chestnut (Aesculus hippocastanum L.). CURRENT RESEARCH IN BIOTECHNOLOGY 2022. [DOI: 10.1016/j.crbiot.2022.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Purification and characterization of a highly thermostable GlcNAc-binding lectin from Collaea speciosa seeds. Int J Biol Macromol 2021; 193:1562-1571. [PMID: 34740693 DOI: 10.1016/j.ijbiomac.2021.10.219] [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: 09/06/2021] [Revised: 10/29/2021] [Accepted: 10/29/2021] [Indexed: 11/21/2022]
Abstract
Lectins from plants of the Diocleinae subtribe often exhibit specificity towards mannose/glucose and derived sugars, with some plants also displaying a second lectin specific to lactose/GalNAc. Here, we present a novel lectin from Collaea speciosa, named CsL, that displays specificity for GlcNAc/glucose. The lectin was extracted from Collaea speciosa seeds and purified by a single chromatographic step on a Sephadex G-50 matrix. In solution, the lectin appears as a dimeric protein composed of 25 kDa monomers. The protein is stable at pH 7-8 and dependent on divalent cations. CsL maintained its agglutination activity after heating to 90 °C for 1 h. Glycan array studies revealed that CsL binds to N-glycans with terminal GlcNAc residues, chitobiose and chitotriose moieties. The partial amino acid sequence of the lectin is similar to that of some lactose-specific lectins from the same subtribe. In contrast to other ConA-like lectins, CsL is not toxic to Artemia. Because of its remarkably different properties and specificity, this lectin could be the first member of a new group inside the Diocleinae lectins.
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Zhang Y, Han H, Qin J, Zhang N, Zhang G, Song Y. Controlled synthesis of metal-organic frameworks with skeletal and pore-filling iron(III) porphyrins for electrochemical oxygen reduction. J PORPHYR PHTHALOCYA 2021. [DOI: 10.1142/s1088424621500760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Electrocatalysts derived from porphyrinic metal-organic frameworks (MOFs) have exhibited very promising electrochemical performances toward oxygen reduction reaction (ORR). Nevertheless, porphyrinic MOFs have been limited to skeleton- or the pore-modified ones mostly by Fe porphyrin (FeP), which only provide insufficient ORR active sites. Herein, we report controlled synthesis of PCN-222 decorated by both pore-filling Hemin and skeletal iron(III) meso-tetra(4-carboxyphenyl) porphyrin (Fe[Formula: see text]TCPP) that partially substitutes original backbone TCPP. Subsequent pyrolysis of the composite PCN-222 led to the synthesis of nanorod electrocatalysts with atomically dispersed Fe-N-C sites, which exhibit efficient activity and durability toward ORR in both alkaline and acidic media. Moreover, it appears that the atomically dispersed Fe-N-C sites might possess a distorted octahedral configuration of (O/N)2-Fe[Formula: see text]-N4 as evidenced by extended X-ray absorption fine structure spectra (EXAFS), aberration-corrected high-angle annular dark-field scanning transmission electron microscope (HAADF-STEM), and X-ray photoelectron spectroscopy (XPS). To the best of our knowledge, controlled modification to both the skeleton and the pore of MOFs with FeP for the synthesis of Fe-N-C electrocatalysts has not been reported prior to this study. This study offers a new avenue to manipulate the density of Fe-N-C sites of electrocatalysts, which may be applied to other composite MOFs with various functionalities.
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Affiliation(s)
- Yunlong Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Hongsa Han
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Jiaqi Qin
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Na Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Guanghui Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Yujiang Song
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
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Harmandar K, Kaya EN, Saglam MF, Sengul IF, Atilla D. Bis-indole substituted phthalocyanines: Photophysical and photochemical properties. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424620500522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Tetra substituted peripheral and non-peripheral Zn(II) phthalocyanines were successfully synthesized employing 4-(bis(3-methyl-1H-indol-2-yl)methyl)phenol as a starting material. The structure of these synthesized compounds was confirmed using 1H NMR, [Formula: see text]C NMR, infrared (IR), UV-vis, and MALDI-TOF spectral data. The photophysical (fluorescence quantum yields and lifetimes) and photochemical (singlet oxygen generation) properties of all synthesized peripheral and non-peripheral compounds were investigated in order to determine the potential of these compounds for application in photodynamic therapy.
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Affiliation(s)
- Kevser Harmandar
- Gebze Technical University, Faculty of Science, Department of Chemistry, 41400, Gebze, Kocaeli, Turkey
| | - Esra N. Kaya
- Gebze Technical University, Faculty of Science, Department of Chemistry, 41400, Gebze, Kocaeli, Turkey
| | - Mehmet F. Saglam
- Gebze Technical University, Faculty of Science, Department of Chemistry, 41400, Gebze, Kocaeli, Turkey
| | - Ibrahim F. Sengul
- Gebze Technical University, Faculty of Science, Department of Chemistry, 41400, Gebze, Kocaeli, Turkey
| | - Devrim Atilla
- Gebze Technical University, Faculty of Science, Department of Chemistry, 41400, Gebze, Kocaeli, Turkey
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López de Los Santos Y, Bernard DN, Egesborg P, Létourneau M, Lafortune C, Cuneo MJ, Urvoas A, Chatenet D, Mahy JP, St-Pierre Y, Ricoux R, Doucet N. Binding of a Soluble meso-Tetraarylporphyrin to Human Galectin-7 Induces Oligomerization and Modulates Its Pro-Apoptotic Activity. Biochemistry 2020; 59:4591-4600. [PMID: 33231438 DOI: 10.1021/acs.biochem.0c00736] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The selective targeting of protein-protein interactions remains a significant determinant for the proper modulation and regulation of cell apoptosis. Prototypic galectins such as human galectin-7 (GAL-7) are characterized by their ability to form homodimers that control the molecular fate of a cell by mediating subtle yet critical glycan-dependent interactions between pro- and anti-apoptotic molecular partners. Altering the structural architecture of GAL-7 can therefore result in resistance to apoptosis in various human cancer cells, further illustrating its importance in cell survival. In this study, we used a combination of biophysical and cellular assays to illustrate that binding of a water-soluble meso-tetraarylporphyrin molecule to GAL-7 induces protein oligomerization and modulation of GAL-7-induced apoptosis in human Jurkat T cells. Our results suggest that the integrity of the GAL-7 homodimer architecture is essential for its molecular function, in addition to providing an interesting porphyrin binding modulator for controlling apoptosis in mammalian cells.
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Affiliation(s)
- Yossef López de Los Santos
- Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS), Université du Québec, Laval, QC H7V 1B7, Canada
| | - David N Bernard
- Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS), Université du Québec, Laval, QC H7V 1B7, Canada
| | - Philippe Egesborg
- Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS), Université du Québec, Laval, QC H7V 1B7, Canada
| | - Myriam Létourneau
- Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS), Université du Québec, Laval, QC H7V 1B7, Canada
| | - Clara Lafortune
- Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS), Université du Québec, Laval, QC H7V 1B7, Canada
| | - Matthew J Cuneo
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, United States
| | - Agathe Urvoas
- Institut de biologie intégrative de la cellule (I2BC), CNRS, Université Paris-Saclay, 91190 Orsay, France
| | - David Chatenet
- Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS), Université du Québec, Laval, QC H7V 1B7, Canada
| | - Jean-Pierre Mahy
- Laboratoire de chimie bioorganique et bioinorganique, Institut de chimie moléculaire et des matériaux d'Orsay (ICMMO), CNRS, Université Paris-Saclay, 91190 Orsay, France
| | - Yves St-Pierre
- Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS), Université du Québec, Laval, QC H7V 1B7, Canada
| | - Rémy Ricoux
- Laboratoire de chimie bioorganique et bioinorganique, Institut de chimie moléculaire et des matériaux d'Orsay (ICMMO), CNRS, Université Paris-Saclay, 91190 Orsay, France
| | - Nicolas Doucet
- Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS), Université du Québec, Laval, QC H7V 1B7, Canada.,PROTEO, the Quebec Network for Research on Protein Function, Engineering, and Applications, Université Laval, Quebec City, QC G1V 0A6, Canada
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Binding of Gold(III) Porphyrin by the Pro-metastatic Regulatory Protein Human Galectin-3. Molecules 2019; 24:molecules24244561. [PMID: 31842510 PMCID: PMC6943629 DOI: 10.3390/molecules24244561] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/09/2019] [Accepted: 12/11/2019] [Indexed: 12/21/2022] Open
Abstract
Gold(III) porphyrin presents an attractive alternative to the use of, for example, cisplatin in chemotherapy. However, approaches that allow to selectively target cancer cells are highly sought. Many plant and mammalian lectins have been shown to bind oligosaccharide sequences of the aberrant glycosylation pattern found on cancerous tumors. For example human galectin-3, of the galectin family specific for β-galactoside, is overexpressed in the extracellular matrix of tumorigenous and metastatic tissues. We searched for non-carbohydrate ligands for galectin-3 that can guide a cytotoxic drug to the cancer cells by maintaining its affinity for tumor associated carbohydrate antigens. Previous findings showed that zinc tetrasulfonatophenylporphyrin can bind galectin-3 with sub-micromolar affinity without disturbing lactose binding. Gold(III) porphyrin is not only cytotoxic to cancer cells, it knows also a potential application as photosensitiser in photodynamic therapy. We investigated the binding of gold(III) porphyrin to galectin-3 using different biophysical interaction techniques and demonstrated a low micromolar affinity of human galectin-3 for the cytotoxic compound. Co-crystallization attempts in order to understand the binding mode of gold porphyrin to galectin-3 failed, but molecular docking emphasized a highly populated secondary binding site that does not hinder lactose or Thomsen Friendenreich disaccharide binding. This suggests that gold(III) porphyrin might significantly enhance its concentration and delivery to cancer cells by binding to human galectin-3 that keeps its orientation towards tumor associated carbohydrate antigens.
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