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Reis WF, Silva MES, Gondim ACS, Torres RCF, Carneiro RF, Nagano CS, Sampaio AH, Teixeira CS, Gomes LCBF, Sousa BL, Andrade AL, Teixeira EH, Vasconcelos MA. Glucose-Binding Dioclea bicolor Lectin (DBL): Purification, Characterization, Structural Analysis, and Antibacterial Properties. Protein J 2024; 43:559-576. [PMID: 38615284 DOI: 10.1007/s10930-024-10199-9] [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] [Accepted: 04/07/2024] [Indexed: 04/15/2024]
Abstract
In this study, we purified a lectin isolated from the seeds of Dioclea bicolor (DBL) via affinity purification. Electrophoresis analysis revealed that DBL had three bands, α, β, and γ chains, with molecular masses of approximately 29, 14, and 12 kDa, respectively. Gel filtration chromatography revealed that the native form of DBL had a molecular mass of approximately 100 kDa, indicating that it is a tetramer. Interestingly, DBL-induced hemagglutination was inhibited by several glucosides, mannosides, ampicillin, and tetracycline with minimum inhibitory concentration (MIC) values of 1.56-50 mM. Analysis of the complete amino acid sequence of DBL revealed the presence of 237 amino acids with high similarity to other Diocleinae lectins. Circular dichroism showed the prominent β-sheet secondary structure of DBL. Furthermore, DBL structure prediction revealed a Discrete Optimized Protein Energy (DOPE) score of -26,642.69141/Normalized DOPE score of -1.84041. The DBL monomer was found to consist a β-sandwich based on its 3D structure. Molecular docking showed the interactions between DBL and α-D-glucose, N-acetyl-D-glucosamine, α-D-mannose, α-methyl-D-mannoside, ampicillin, and tetracycline. In addition, DBL showed antimicrobial activity with an MIC of 125 μg/mL and exerted synergistic effects in combination with ampicillin and tetracycline (fractional inhibitory concentration index ≤ 0.5). Additionally, DBL significantly inhibited biofilm formation and showed no toxicity in murine fibroblasts (p < 0.05). These results suggest that DBL exhibits antimicrobial activity and works synergistically with antibiotics.
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Affiliation(s)
- Willian F Reis
- Departamento de Ciências da Natureza E da Terra, Universidade Do Estado de Minas Gerais, Unidade de Divinópolis, Divinópolis, MG, Brazil
| | - Marcos E S Silva
- Faculdade de Educação de Itapipoca, Universidade Estadual Do Ceará, Itapipoca, CE, Brazil
- Faculdade de Ciências Exatas E Naturais, Universidade Do Estado Do Rio Grande Do Norte, Mossoró, RN, Brazil
| | - Ana C S Gondim
- Departamento de Química Orgânica E Inorgânica, Universidade Federal Do Ceará, Fortaleza, CE, Brazil
| | - Renato C F Torres
- Centro de Ciências Agrárias E da Biodiversidade, Universidade Federal Do Cariri, Crato, CE, Brazil
| | - Rômulo F Carneiro
- Laboratório de Biotecnologia Marinha - BioMar-Lab, Departamento de Engenharia de Pesca, Universidade Federal Do Ceará, Fortaleza, CE, Brazil
| | - Celso S Nagano
- Laboratório de Biotecnologia Marinha - BioMar-Lab, Departamento de Engenharia de Pesca, Universidade Federal Do Ceará, Fortaleza, CE, Brazil
| | - Alexandre H Sampaio
- Laboratório de Biotecnologia Marinha - BioMar-Lab, Departamento de Engenharia de Pesca, Universidade Federal Do Ceará, Fortaleza, CE, Brazil
| | - Claudener S Teixeira
- Centro de Ciências Agrárias E da Biodiversidade, Universidade Federal Do Cariri, Crato, CE, Brazil
| | - Lenita C B F Gomes
- Faculdade de Filosofia Dom Aureliano Matos, Universidade Estadual Do Ceará, Limoeiro Do Norte, CE, Brazil
| | - Bruno L Sousa
- Faculdade de Filosofia Dom Aureliano Matos, Universidade Estadual Do Ceará, Limoeiro Do Norte, CE, Brazil
| | - Alexandre L Andrade
- Laboratório Integrado de Biomoléculas - LIBS, Departamento de Patologia E Medicina Legal, Universidade Federal Do Ceará, Fortaleza, CE, Brazil
| | - Edson H Teixeira
- Laboratório Integrado de Biomoléculas - LIBS, Departamento de Patologia E Medicina Legal, Universidade Federal Do Ceará, Fortaleza, CE, Brazil
| | - Mayron A Vasconcelos
- Departamento de Ciências da Natureza E da Terra, Universidade Do Estado de Minas Gerais, Unidade de Divinópolis, Divinópolis, MG, Brazil.
- Faculdade de Educação de Itapipoca, Universidade Estadual Do Ceará, Itapipoca, CE, Brazil.
- Faculdade de Ciências Exatas E Naturais, Universidade Do Estado Do Rio Grande Do Norte, Mossoró, RN, Brazil.
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Cavada BS, Pinto-Junior VR, Osterne VJS, Nascimento KS. ConA-Like Lectins: High Similarity Proteins as Models to Study Structure/Biological Activities Relationships. Int J Mol Sci 2018; 20:ijms20010030. [PMID: 30577614 PMCID: PMC6337138 DOI: 10.3390/ijms20010030] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 12/17/2018] [Accepted: 12/19/2018] [Indexed: 01/03/2023] Open
Abstract
Lectins are a widely studied group of proteins capable of specific and reversible binding to carbohydrates. Undoubtedly, the best characterized are those extracted from plants of the Leguminosae family. Inside this group of proteins, those from the Diocleinae subtribe have attracted attention, in particular Concanavalin A (ConA), the best-studied lectin of the group. Diocleinae lectins, also called ConA-like lectins, present a high similarity of sequence and three-dimensional structure and are known to present inflammatory, vasoactive, antibiotic, immunomodulatory and antitumor activities, among others. This high similarity of lectins inside the ConA-like group makes it possible to use them to study structure/biological activity relationships by the variability of both carbohydrate specificity and biological activities results. It is in this context the following review aims to summarize the most recent data on the biochemical and structural properties, as well as biological activities, of ConA-like lectins and the use of these lectins as models to study structure/biological activity relationships.
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Affiliation(s)
- Benildo S Cavada
- BioMol-Lab, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza-CE 60440-970, Brazil.
| | - Vanir R Pinto-Junior
- BioMol-Lab, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza-CE 60440-970, Brazil.
| | - Vinicius J S Osterne
- BioMol-Lab, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza-CE 60440-970, Brazil.
| | - Kyria S Nascimento
- BioMol-Lab, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza-CE 60440-970, Brazil.
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Amorim RMF, Pires AF, dos Santos-Nascimento T, Cavada BS, do Nascimento KS, Cajazeiras JB, Leal-Cardoso JH, Mota MRL, Assreuy AMS. The leguminous lectin of Lonchocarpus araripensis promotes antinociception via mechanisms that include neuronal inhibition of Na+ currents. Inflamm Res 2016; 65:701-8. [DOI: 10.1007/s00011-016-0951-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 04/15/2016] [Accepted: 05/02/2016] [Indexed: 11/29/2022] Open
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Nascimento KS, Nascimento FLFD, Silva MTL, Nobre CB, Moreira CG, Brizeno LAC, da Ponte EL, Assreuy AMS, Cavada BS. Purification of a thermostable antinociceptive lectin isolated fromAndira anthelmia. J Mol Recognit 2015; 29:248-52. [DOI: 10.1002/jmr.2523] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 10/14/2015] [Accepted: 10/25/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Kyria Santiago Nascimento
- Laboratório de Moléculas Biologicamente Ativas (Biomol-Lab), Department of Biochemistry, Molecular Biology; Federal University of Ceará; Av Mister Hull s/n, Bloco 907, Lab. 1075, Campus do Pici Fortaleza CE 60440-970 Brazil
| | - Francisco Lucas Faustino do Nascimento
- Laboratório de Fisio-Farmacologia da Inflamação (LAFFIN), Institute of Biomedical Sciences; State University of Ceará; Av. Paranjana 1700 60740-000 Fortaleza Ceará Brazil
| | - Mayara Torquato Lima Silva
- Laboratório de Moléculas Biologicamente Ativas (Biomol-Lab), Department of Biochemistry, Molecular Biology; Federal University of Ceará; Av Mister Hull s/n, Bloco 907, Lab. 1075, Campus do Pici Fortaleza CE 60440-970 Brazil
| | - Camila Bezerra Nobre
- Laboratório de Moléculas Biologicamente Ativas (Biomol-Lab), Department of Biochemistry, Molecular Biology; Federal University of Ceará; Av Mister Hull s/n, Bloco 907, Lab. 1075, Campus do Pici Fortaleza CE 60440-970 Brazil
| | - Cleane Gomes Moreira
- Laboratório de Moléculas Biologicamente Ativas (Biomol-Lab), Department of Biochemistry, Molecular Biology; Federal University of Ceará; Av Mister Hull s/n, Bloco 907, Lab. 1075, Campus do Pici Fortaleza CE 60440-970 Brazil
| | - Luiz André Cavalcante Brizeno
- Laboratório de Moléculas Biologicamente Ativas (Biomol-Lab), Department of Biochemistry, Molecular Biology; Federal University of Ceará; Av Mister Hull s/n, Bloco 907, Lab. 1075, Campus do Pici Fortaleza CE 60440-970 Brazil
| | - Edson Lopes da Ponte
- Centro Universitário Christus - Unichristus; Campus Parque Ecológico; Rua João Adolfo Gurgel, 133 - Cocó Fortaleza Ceará 60190-060 Brazil
| | - Ana Maria Sampaio Assreuy
- Laboratório de Fisio-Farmacologia da Inflamação (LAFFIN), Institute of Biomedical Sciences; State University of Ceará; Av. Paranjana 1700 60740-000 Fortaleza Ceará Brazil
| | - Benildo Sousa Cavada
- Laboratório de Moléculas Biologicamente Ativas (Biomol-Lab), Department of Biochemistry, Molecular Biology; Federal University of Ceará; Av Mister Hull s/n, Bloco 907, Lab. 1075, Campus do Pici Fortaleza CE 60440-970 Brazil
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Effects of Canavalia lectins on acute inflammation in sensitized and non-sensitized rats. Inflammation 2014; 36:713-22. [PMID: 23377963 DOI: 10.1007/s10753-013-9596-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The anti-inflammatory activity of Canavalia seed lectins (Canavalia gladiata [CGL], Canavalia maritima [ConM] and Canavalia brasiliensis [ConBr]) was evaluated by intravenous administration in rats. In non-sensitized rats, cellular edema elicited by carrageenan was reduced (45-51 %) by ConM and (44-59 %) by CGL. Osmotic edema elicited by dextran was reduced by ConM and CGL in 27 % and 29 %. ConM and CGL reduced the edema elicited by L-arginine in 53 % and that of prostaglandin E2 in 48 % and 36 %. Leukocyte migration elicited by carrageenan was reduced in 49 % by ConM and in 55 % by CGL (attenuated in 4× by glucose) and peritoneal TNF-α content in 82 %. In rats sensitized, ConM inhibited the paw edema and leukocyte migration elicited by ovalbumin in 34 % and 70 %. ConM and CGL are anti-inflammatory, mainly in cellular events mediated by prostaglandin E₂, nitric oxide and TNF-α in non-sensitized rats. However, only ConM is anti-inflammatory in sensitized rats. CGL effect involves the lectin domain.
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Purification, Partial Characterization, and CNBr-Sepharose Immobilization of a Vasorelaxant Glucose/Mannose Lectin from Canavalia virosa Seeds. Appl Biochem Biotechnol 2014; 172:3342-53. [DOI: 10.1007/s12010-014-0751-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 01/20/2014] [Indexed: 10/25/2022]
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Moreira GMSG, Conceição FR, McBride AJA, Pinto LDS. Structure predictions of two Bauhinia variegata lectins reveal patterns of C-terminal properties in single chain legume lectins. PLoS One 2013; 8:e81338. [PMID: 24260572 PMCID: PMC3834338 DOI: 10.1371/journal.pone.0081338] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 10/15/2013] [Indexed: 11/18/2022] Open
Abstract
Bauhinia variegata lectins (BVL-I and BVL-II) are single chain lectins isolated from the plant Bauhinia variegata. Single chain lectins undergo post-translational processing on its N-terminal and C-terminal regions, which determines their physiological targeting, carbohydrate binding activity and pattern of quaternary association. These two lectins are isoforms, BVL-I being highly glycosylated, and thus far, it has not been possible to determine their structures. The present study used prediction and validation algorithms to elucidate the likely structures of BVL-I and -II. The program Bhageerath-H was chosen from among three different structure prediction programs due to its better overall reliability. In order to predict the C-terminal region cleavage sites, other lectins known to have this modification were analysed and three rules were created: (1) the first amino acid of the excised peptide is small or hydrophobic; (2) the cleavage occurs after an acid, polar, or hydrophobic residue, but not after a basic one; and (3) the cleavage spot is located 5-8 residues after a conserved Leu amino acid. These rules predicted that BVL-I and -II would have fifteen C-terminal residues cleaved, and this was confirmed experimentally by Edman degradation sequencing of BVL-I. Furthermore, the C-terminal analyses predicted that only BVL-II underwent α-helical folding in this region, similar to that seen in SBA and DBL. Conversely, BVL-I and -II contained four conserved regions of a GS-I association, providing evidence of a previously undescribed X4+unusual oligomerisation between the truncated BVL-I and the intact BVL-II. This is the first report on the structural analysis of lectins from Bauhinia spp. and therefore is important for the characterisation C-terminal cleavage and patterns of quaternary association of single chain lectins.
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Affiliation(s)
- Gustavo M. S. G. Moreira
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | - Fabricio R. Conceição
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | - Alan J. A. McBride
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | - Luciano da S. Pinto
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil
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Pinto NV, Santos CF, Cavada BS, Nascimento KSD, Junior FNP, de Freitas Pires A, Assreuy AMS. Homologous Canavalia Lectins Elicit Different Patterns of Antinociceptive Responses. Nat Prod Commun 2013. [DOI: 10.1177/1934578x1300801130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Canavalia gladiata (CGL), C. maritima (ConM) and C. brasiliensis (ConBr) lectins were evaluated in nociception models. ConBr inhibited first (32%) and second (100%) phases of the formalin test; CGL inhibited only the first (74%) and ConM only the second (59%) phase. Hypernociception evaluated in the Von Frey test was inhibited by ConM (55%), CGL (41%) and ConBr (38%). Acetic acid-induced abdominal writhing was reduced by ConBr (66%), CGL (52%) and ConM (60%). ConBr and CGL effects were reversed by the lectin association with its ligand sugar. The antinociceptive activity of the structural homologous lectins was differentiated by potency, efficacy and mechanisms.
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Affiliation(s)
- Nilson Vieira Pinto
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Av. Paranjana 1700, 60.740-000, Fortaleza-CE-Brasil
- Campus Canindé, Instituto Federal de Educação, Ciência e Tecnologia do Ceará, Rodovia BR 020 Km 303, 62700-000, Canindé-CE-Brasil
| | - Cláudia Ferreira Santos
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Av. Paranjana 1700, 60.740-000, Fortaleza-CE-Brasil
| | - Benildo Sousa Cavada
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Av. Mister Hull s/n Bloco 907, 60.445–970, Fortaleza-CE-Brasil
| | - Kyria Santiago do Nascimento
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Av. Mister Hull s/n Bloco 907, 60.445–970, Fortaleza-CE-Brasil
| | - Francisco Nascimento Pereira Junior
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Av. Mister Hull s/n Bloco 907, 60.445–970, Fortaleza-CE-Brasil
| | - Alana de Freitas Pires
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Av. Paranjana 1700, 60.740-000, Fortaleza-CE-Brasil
| | - Ana Maria Sampaio Assreuy
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Av. Paranjana 1700, 60.740-000, Fortaleza-CE-Brasil
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Araújo TS, Teixeira CS, Falcão MAP, Junior VRP, Santiago MQ, Benevides RG, Delatorre P, Martins JL, Alexandre-Moreira MS, Cavada BS, Campesatto EA, Rocha BAM. Anti-inflammatory and Antinociceptive Activity of Chitin-binding Lectin from Canna Limbata Seeds. Appl Biochem Biotechnol 2013; 171:1944-55. [DOI: 10.1007/s12010-013-0470-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 08/22/2013] [Indexed: 01/30/2023]
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de Sousa Ferreira Soares G, Assreuy AMS, de Almeida Gadelha CA, de Morais Gomes V, Delatorre P, da Conceição Simões R, Cavada BS, Leite JF, Nagano CS, Pinto NV, de Luna Freire Pessoa H, Santi-Gadelha T. Purification and biological activities of Abelmoschus esculentus seed lectin. Protein J 2013; 31:674-80. [PMID: 22965555 DOI: 10.1007/s10930-012-9447-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The Abelmoschus esculentus (Malvaceae) plant originated in Africa and has spread across a number of tropic countries, including northeastern Brazil. The plant has been used to treat various disorders, such as cancer, microbial infections, hypoglycemia, constipation, urine retention and inflammation. The lectin of A. esculentus (AEL) was isolated by precipitation with ammonium sulfate at a saturation level of 30/60 and purified by ion exchange chromatography (Sephacel-DEAE). The electrophoresis (SDS-PAGE) profile of the AEL showed two protein bands of apparent molecular mass of approximately 15.0 and 21.0 kDa. The homogenity of the protein was confirmed by electrospray mass spectrometry (ESI-MS), which revealed the presence of a 10.29-kDa monomer and a 20.58-kDa dimer. The AEL exhibits agglutinating activity against rabbit (74.41 UH/mP) and human type ABO erythrocytes (21.00 UH/mP). This activity does not require the presence of divalent cations and is specifically inhibited by lactose, fructose and mannose. The intravenous treatment with 0.01, 0.1 and 1 mg/kg of AEL inhibited the paw edema elicited by carrageenan by approximately 15, 22 and 44 %, respectively, but not that induced by dextran. In addition, treatment with 0.1, 1 and 10 mg/kg of AEL also inhibited the abdominal writhing induced by acetic acid by approximately 52, 57 and 69 %, respectively. In conclusion, AEL is a new lectin with a molecular mass of 20.0 kDa, which is -composed of a 10.291-Da monomer and a 20.582-kDa dimer, that exhibits anti-inflammatory, antinociceptive and hemagglutinating activities. In addition, the lectin hemagglutinating property is both metallo-independent and associated with the lectin domain.
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Bezerra MJB, Rodrigues NVFC, Pires ADF, Bezerra GA, Nobre CB, Alencar KLDL, Soares PMG, Nascimento KSD, Nagano CS, Martins JL, Gruber K, Sampaio AH, Delatorre P, Rocha BAM, Assreuy AMS, Cavada BS. Crystal structure of Dioclea violacea lectin and a comparative study of vasorelaxant properties with Dioclea rostrata lectin. Int J Biochem Cell Biol 2013; 45:807-15. [DOI: 10.1016/j.biocel.2013.01.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 12/23/2012] [Accepted: 01/14/2013] [Indexed: 12/16/2022]
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Souza Teixeira C, da Silva HC, de Moura TR, Pereira-Júnior FN, do Nascimento KS, Nagano CS, Sampaio AH, Delatorre P, Rocha BAM, Cavada BS. Crystal structure of the lectin of Camptosema pedicellatum: implications of a conservative substitution at the hydrophobic subsite. J Biochem 2012; 152:87-98. [PMID: 22554687 DOI: 10.1093/jb/mvs047] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Lectins have been used as models for studies of the molecular basis of protein-carbohydrate interaction and specificity by deciphering codes present in the glycan structures. The purpose of the present study was to purify and solve the complete primary and crystal structure of the lectin of Camptosema pedicellatum (CPL) complexed with 5-bromo-4-chloro-3-indolyl-α-d-mannose (X-Man) using tandem mass spectrometry. CPL was purified by single-step affinity chromatography. Mass spectrometry findings revealed that purified CPL features a combination of chains weighing 25,298 ± 2 (α-chain), 12,835 ± 2 (β-chain) and 12,481 ± 2 Da (γ-chain). The solved crystal structure of CPL features a conservative mutation in the hydrophobic subsite, a constituent of the carbohydrate recognition domain (CRD), indicating the relevance of hydrophobic interactions in the establishment of interactions with carbohydrates. The substitution and the analysis of the interactions with X-Man also revealed that the hydrophobic effect caused by a minor change in the hydrophobic subsite interferes in the formation of H-bonds due to the reorientation of the indolyl group in the CRD.
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Affiliation(s)
- Claudener Souza Teixeira
- BioMol-Lab, Laboratório de Moléculas Biologicamente Ativas, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará 60440-970, Brazil
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Batista da Nóbrega R, Rocha BA, Gadelha CAA, Santi-Gadelha T, Pires AF, Assreuy AMS, Nascimento KS, Nagano CS, Sampaio AH, Cavada BS, Delatorre P. Structure of Dioclea virgata lectin: Relations between carbohydrate binding site and nitric oxide production. Biochimie 2012; 94:900-6. [DOI: 10.1016/j.biochi.2011.12.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Accepted: 12/09/2011] [Indexed: 01/28/2023]
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Crystal structure of a pro-inflammatory lectin from the seeds of Dioclea wilsonii Standl. Biochimie 2011; 94:525-32. [PMID: 21924319 DOI: 10.1016/j.biochi.2011.09.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Accepted: 09/01/2011] [Indexed: 01/06/2023]
Abstract
The crystal structure and pro-inflammatory property of a lectin from the seeds of Dioclea wilsonii (DwL) were analyzed to gain a better understanding of structure/function relationships of Diocleinae lectins. Following crystallization and structural determination by standard molecular replacement techniques, DwL was found to be a tetramer based on PISA analysis, and composed by two metal-binding sites per monomer and loops which are involved in molecular oligomerization. DwL presents 96% and 99% identity with two other previously described lectins of Dioclea rostrata (DRL) and Dioclea grandiflora (DGL). DwL differs structurally from DVL and DRL with regard to the conformation of the carbohydrate recognition domain and related biological activities. The structural analysis of DwL in comparison to other Diocleinae lectins can be related to the differences in the dose-dependent pro-inflammatory effect elicited in Wistar rats, probably via specific interactions with mast cells complex carbohydrate, resulting in significant paw edema. DwL appears to be involved in positive modulation of mast cell degranulation via recognition of surface carbohydrates. Since this recognition is dependent on site volume and CRD configuration, edematogenesis mediated by resident cells varies in potency and efficacy among different Diocleinae lectins.
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