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Oliveira C, Freitas AI, Campos N, Saraiva L, Domingues L. Cytotoxicity of Frutalin on Distinct Cancer Cells Is Independent of Its Glycosylation. Molecules 2021; 26:molecules26164712. [PMID: 34443300 PMCID: PMC8401544 DOI: 10.3390/molecules26164712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 07/25/2021] [Accepted: 07/31/2021] [Indexed: 11/16/2022] Open
Abstract
Frutalin is a plant lectin with beneficial immunobiological action, although the access to its active form is still restricted. Moreover, there is a knowledge gap on isoform activity and glycosylation impact on its bioactivity, and recombinant production protocols were seen as ineffective. Here, a simpler and faster production and purification protocol was developed, attaining a yield of purified frutalin 3.3-fold higher than that obtained previously. Hemagglutination assays confirmed that this frutalin isoform could not agglutinate rabbit erythrocytes, while maintaining the native tetrameric structure, as indicated by DLS analysis, and strong interaction with methyl-alpha-galactose, in fluorescence spectroscopy studies. The cytotoxicity of the recombinant frutalin isoform was shown in a broad panel of human cancer cells: colon (HCT116), melanoma (A375), triple-negative breast cancer (MDA-MB-231), and ovarian (IGROV-1). Treatment with 8.5–11.8 μM TrxFTL reduced proliferation of all cancer cells to half in 48 h. This anti-proliferative effect encompasses the p53 pathway since it was significantly reduced in p53-null colon cancer cells (HCT116 p53−/−; GI50 of 25.0 ± 3.0 μM), when compared to the isogenic p53-positive cells (HCT116 p53+/+; GI50 of 8.7 ± 1.8 μM; p < 0.002). This recombinantly produced frutalin isoform has relevant cytotoxic effect and its biological activity is not dependent on glycosylation. The developed E. coli production and purification protocol generates high yield of non-glycosylated frutalin isoform with potent cytotoxic activity, enabling the development of novel anticancer p53-targeting therapies.
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Affiliation(s)
- Carla Oliveira
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal;
| | - Ana Isabel Freitas
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal;
| | - Nair Campos
- LAQV/REQUIMTE, Laboratόrio de Microbiologia, Departamento de Ciências Biolόgicas, Faculdade de Farmácia, Universidade do Porto, 4050-313 Porto, Portugal; (N.C.); (L.S.)
| | - Lucília Saraiva
- LAQV/REQUIMTE, Laboratόrio de Microbiologia, Departamento de Ciências Biolόgicas, Faculdade de Farmácia, Universidade do Porto, 4050-313 Porto, Portugal; (N.C.); (L.S.)
| | - Lucília Domingues
- CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal;
- Correspondence: ; Tel.: +351-253-604-405
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2
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Nascimento KS, Andrade MLL, Silva IB, Domingues DL, Chicas LS, Silva MTL, Bringel PHSF, Marques GFO, Martins MGQ, Lóssio CF, Nascimento APM, Wolin IAV, Leal RB, Assreuy AMS, Cavada BS. Heterologous production of α-chain of Dioclea sclerocarpa lectin: Enhancing the biological effects of a wild-type lectin. Int J Biol Macromol 2020; 156:1-9. [PMID: 32275993 DOI: 10.1016/j.ijbiomac.2020.04.009] [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: 01/22/2020] [Revised: 03/31/2020] [Accepted: 04/02/2020] [Indexed: 10/24/2022]
Abstract
Lectins from Diocleinae subtribe species (family Leguminosae) are of special interest since they present a wide spectrum of biological activities, despite their high structural similarity. During their synthesis in plant cells, these proteins undergo post-translational processing resulting in the formation of three chains (α, β, γ), which constitute the lectins' subunits. Furthermore, such wild-type proteins are presented as isolectins or with different combinations of these chains, which undermine their biotechnological potential. Thus, the present study aimed to produce a recombinant form of the lectin from Dioclea sclerocarpa seeds (DSL), exclusively constituted by α-chain. The recombinant DSL (rDSL) was successfully expressed in E. coli BL21 (DE3) and purified by affinity chromatography (Sephadex G-50), showing a final yield of 74 mg of protein per liter of culture medium and specificity for D-mannose, α-methyl-mannoside and melibiose, unlike the wild-type protein. rDSL presented an effective vasorelaxant effect in rat aortas up to 100% and also interacted with glioma cells C6 and U87. Our results demonstrated an efficient recombinant production of rDSL in a bacterial system that retained some biochemical properties of the wild-type protein, showing wider versatility in sugar specificities and better efficacy in its activity in the biological models evaluated in this work.
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Affiliation(s)
- Kyria S Nascimento
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, 60440970 Fortaleza, Ceará, Brazil
| | - Maria L L Andrade
- Universidade Federal do Rio Grande do Norte, Escola Agrícola de Jundiaí, Distrito de Jundiaí, 59280000 Macaíba, Rio Grande do Norte, Brazil
| | - Ivanice B Silva
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, 60440970 Fortaleza, Ceará, Brazil
| | - Daniel L Domingues
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, 60440970 Fortaleza, Ceará, Brazil
| | - Larissa S Chicas
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, 60440970 Fortaleza, Ceará, Brazil
| | - Mayara T L Silva
- Departamento de Bioquímica e Programa de Pós-graduação em Bioquímica, Universidade Federal de Santa Catarina, Campus Universitário, 88040900 Florianópolis, Santa Catarina, Brazil
| | - Pedro H S F Bringel
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Campus do Itaperi, 60714903 Fortaleza, Ceará, Brazil
| | - Gabriela F O Marques
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Campus do Itaperi, 60714903 Fortaleza, Ceará, Brazil
| | - Maria G Q Martins
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, 60440970 Fortaleza, Ceará, Brazil; Centro Universitário INTA, Programa de pós-graduação em Biotecnologia, Sobral, Ceará, Brazil
| | - Claudia F Lóssio
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, 60440970 Fortaleza, Ceará, Brazil
| | - Ana Paula M Nascimento
- Departamento de Bioquímica e Programa de Pós-graduação em Bioquímica, Universidade Federal de Santa Catarina, Campus Universitário, 88040900 Florianópolis, Santa Catarina, Brazil
| | - Ingrid A V Wolin
- Departamento de Bioquímica e Programa de Pós-graduação em Bioquímica, Universidade Federal de Santa Catarina, Campus Universitário, 88040900 Florianópolis, Santa Catarina, Brazil
| | - Rodrigo B Leal
- Departamento de Bioquímica e Programa de Pós-graduação em Bioquímica, Universidade Federal de Santa Catarina, Campus Universitário, 88040900 Florianópolis, Santa Catarina, Brazil
| | - Ana M S Assreuy
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Campus do Itaperi, 60714903 Fortaleza, Ceará, Brazil.
| | - Benildo S Cavada
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Campus do Pici, 60440970 Fortaleza, Ceará, Brazil.
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3
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Martínez-Alarcón D, Blanco-Labra A, García-Gasca T. Expression of Lectins in Heterologous Systems. Int J Mol Sci 2018; 19:E616. [PMID: 29466298 PMCID: PMC5855838 DOI: 10.3390/ijms19020616] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 12/24/2017] [Accepted: 12/27/2017] [Indexed: 01/24/2023] Open
Abstract
Lectins are proteins that have the ability to recognize and bind in a reversible and specific way to free carbohydrates or glycoconjugates of cell membranes. For these reasons, they have been extensively used in a wide range of industrial and pharmacological applications. Currently, there is great interest in their production on a large scale. Unfortunately, conventional techniques do not provide the appropriate platform for this purpose and therefore, the heterologous production of lectins in different organisms has become the preferred method in many cases. Such systems have the advantage of providing better yields as well as more homogeneous and better-defined properties for the resultant products. However, an inappropriate choice of the expression system can cause important structural alterations that have repercussions on their biological activity since the specificity may lay in their post-translational processing, which depends largely on the producing organism. The present review aims to examine the most representative studies in the area, exposing the four most frequently used systems (bacteria, yeasts, plants and animal cells), with the intention of providing the necessary information to determine the strategy to follow in each case as well as their respective advantages and disadvantages.
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Affiliation(s)
- Dania Martínez-Alarcón
- Departamento de Biotecnología y Bioquímica, Centro de Investigación y Estudios Avanzados del IPN, Km. 9.6 Libramiento Norte, Carretera Irapuato-León, Irapuato 36824, Guanajuato, Mexico.
| | - Alejandro Blanco-Labra
- Departamento de Biotecnología y Bioquímica, Centro de Investigación y Estudios Avanzados del IPN, Km. 9.6 Libramiento Norte, Carretera Irapuato-León, Irapuato 36824, Guanajuato, Mexico.
| | - Teresa García-Gasca
- Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Av. de las Ciencias s/n, Juriquilla, Santiago de Querétaro 76230, Querétaro, Mexico.
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Hwang HJ, Han JW, Kim GH, Han JW. Functional Expression and Characterization of the Recombinant N-Acetyl-Glucosamine/N-Acetyl-Galactosamine-Specific Marine Algal Lectin BPL3. Mar Drugs 2018; 16:E13. [PMID: 29303968 PMCID: PMC5793061 DOI: 10.3390/md16010013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 12/16/2017] [Accepted: 12/28/2017] [Indexed: 01/29/2023] Open
Abstract
Lectins, characterized by their carbohydrate-binding ability, have extensive practical applications. However, their industrial use is limited due to impurity. Thus, quality-controlled production of recombinant lectin is necessary. In this study, the algal lectin BPL3 (Bryopsis plumosa lectin 3) was successfully produced using a bacterial expression system, BL21(DE3), with an artificial repeated structure (dimeric construct). Recombinant dimeric BPL3 (rD2BPL3) was confirmed by LC-MS/MS spectrometry. Expression efficiency was greater for the construct with the repeat structure (rD2BPL3) than the monomeric form (rD1BPL3). Optimal conditions for expression were 1 mM IPTG at 20 °C. Recombinant lectin was purified under denaturing conditions and refolded by the flash dilution method. Recombinant BPL3 was solubilized in 1× PBS containing 2 M urea. rD2BPL3 showed strong hemagglutination activity using human erythrocyte. rD2BPL3 had a similar sugar specificity to that of the native protein, i.e., to N-acetyl-glucosamine (GlcNAc) and N-acetyl-galactosamine (GalNAc). Glycan array results showed that recombinant BPL3 and native BPL3 exhibited different binding properties. Both showed weak binding activity to α-Man-Sp. Native BPL3 showed strong binding specificity to the alpha conformation of amino sugars, and rD2BPL3 had binding activity to the beta conformation. The process developed in this study was suitable for the quality-controlled large-scale production of recombinant lectins.
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Affiliation(s)
- Hyun-Ju Hwang
- Department of Genetic Resources Research, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea.
| | - Jin-Woo Han
- Department of Genetic Resources Research, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea.
| | - Gwang Hoon Kim
- Department of Biology, Kongju National University, Kongju 32588, Korea.
| | - Jong Won Han
- Department of Genetic Resources Research, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea.
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5
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Frutapin, a lectin from Artocarpus incisa (breadfruit): cloning, expression and molecular insights. Biosci Rep 2017; 37:BSR20170969. [PMID: 28684550 PMCID: PMC5520216 DOI: 10.1042/bsr20170969] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 07/02/2017] [Accepted: 07/04/2017] [Indexed: 12/22/2022] Open
Abstract
Artocarpus incisa (breadfruit) seeds contain three different lectins (Frutalin, Frutapin (FTP) and Frutackin) with distinct carbohydrate specificities. The most abundant lectin is Frutalin, an α-D-galactose-specific carbohydrate-binding glycoprotein with antitumour properties and potential for tumour biomarker discovery as already reported. FTP is the second most abundant, but proved difficult to purify with very low yields and contamination with Frutalin frustrating its characterization. Here, we report for the first time high-level production and isolation of biologically active recombinant FTP in Escherichia coli BL21, optimizing conditions with the best set yielding >40 mg/l culture of soluble active FTP. The minimal concentration for agglutination of red blood cells was 62.5 µg/ml of FTP, a process effectively inhibited by mannose. Apo-FTP, FTP–mannose and FTP–glucose crystals were obtained, and they diffracted X-rays to a resolution of 1.58 (P212121), 1.70 (P3121) and 1.60 (P3121) Å respectively. The best solution showed four monomers per asymmetric unit. Molecular dynamics (MD) simulation suggested that FTP displays higher affinity for mannose than glucose. Cell studies revealed that FTP was non-cytotoxic to cultured mouse fibroblast 3T3 cells below 0.5 mg/ml and was also capable of stimulating cell migration at 50 µg/ml. In conclusion, our optimized expression system allowed high amounts of correctly folded soluble FTP to be isolated. This recombinant bioactive lectin will now be tested in future studies for therapeutic potential; for example in wound healing and tissue regeneration.
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6
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Lobo MDP, Moreno FBMB, Souza GHMF, Verde SMML, Moreira RDA, Monteiro-Moreira ACDO. Label-Free Proteome Analysis of Plasma from Patients with Breast Cancer: Stage-Specific Protein Expression. Front Oncol 2017; 7:14. [PMID: 28210565 PMCID: PMC5288737 DOI: 10.3389/fonc.2017.00014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 01/18/2017] [Indexed: 11/13/2022] Open
Abstract
Breast cancer is one of the most commonly diagnosed types of cancer among women. Breast cancer mortality rates remain high probably because its diagnosis is hampered by inaccurate detection methods. Since changes in protein expression as well as modifications in protein glycosylation have been frequently reported in cancer development, the aim of this work was to study the differential expression as well as modifications of glycosylation of proteins from plasma of women with breast cancer at different stages of disease (n = 30) compared to healthy women (n = 10). A proteomics approach was used that depleted albumin and IgG from plasma followed by glycoprotein enrichment using immobilized Moraceae lectin (frutalin)-affinity chromatography and data-independent label-free mass spectrometric analysis. Data are available via ProteomeXchange with identifier PXD003106. As result, 57,016 peptides and 4,175 proteins among all samples were identified. From this, 40 proteins present in unbound (PI—proteins that did not interact with lectin) and bound (PII—proteins that interacted with lectin) fractions were differentially expressed. High levels of apolipoprotein A-II were detected here that were elevated significantly in the early and advanced stages of the disease. Apolipoprotein C-III was detected in both fractions, and its level was increased slightly in the PI fraction of patients with early-stage breast cancer and expressed at higher levels in the PII fraction of patients with early and intermediate stages. Clusterin was present at higher levels in both fractions of patients with early and intermediate stages of breast cancer. Our findings reveal a correlation between alterations in protein glycosylation, lipid metabolism, and the progression of breast cancer.
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Affiliation(s)
- Marina Duarte Pinto Lobo
- Department of Biochemistry and Molecular Biology, Federal University of Ceará (UFC), Fortaleza, Brazil; Center of Experimental Biology (Nubex), University of Fortaleza (UNIFOR), Fortaleza, Brazil
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7
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Anti-Neuroblastoma Properties of a Recombinant Sunflower Lectin. Int J Mol Sci 2017; 18:ijms18010092. [PMID: 28075401 PMCID: PMC5297726 DOI: 10.3390/ijms18010092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 12/18/2016] [Accepted: 12/20/2016] [Indexed: 11/17/2022] Open
Abstract
According to their sugar recognition specificity, plant lectins are proposed as bioactive proteins with potential in cancer treatment and diagnosis. Helja is a mannose-specific jacalin-like lectin from sunflower which was shown to inhibit the growth of certain fungi. Here, we report its recombinant expression in a prokaryotic system and its activity in neurobalstoma cells. Helja coding sequence was fused to the pET-32 EK/LIC, the enterokinase/Ligation-independent cloning vector and a 35 kDa protein was obtained in Escherichia coli representing Helja coupled to thioredoxin (Trx). The identity of this protein was verified using anti-Helja antibodies. This chimera, named Trx-rHelja, was enriched in the soluble bacterial extracts and was purified using Ni+2-Sepharose and d-mannose-agarose chromatography. Trx-rHelja and the enterokinase-released recombinant Helja (rHelja) both displayed toxicity on human SH-SY5Y neuroblastomas. rHelja decreased the viability of these tumor cells by 75% according to the tetrazolium reduction assay, and microscopic analyses revealed that the cell morphology was disturbed. Thus, the stellate cells of the monolayer became spheroids and were isolated. Our results indicate that rHelja is a promising tool for the development of diagnostic or therapeutic methods for neuroblastoma cells, the most common solid tumors in childhood.
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8
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Lectin I from Bauhinia variegata (BVL-I) expressed by Pichia pastoris inhibits initial adhesion of oral bacteria in vitro. Int J Biol Macromol 2016; 93:913-918. [DOI: 10.1016/j.ijbiomac.2016.09.062] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 09/16/2016] [Indexed: 12/19/2022]
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9
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Monteiro-Moreira ACDO, D’Muniz Pereira H, Vieira Neto AE, Mendes Batista Moreno FB, Duarte Pinto Lobo M, de Sousa FD, Moreira RDA. Crystallization and preliminary X-ray diffraction studies of frutalin, an α-D-galactose-specific lectin from Artocarpus incisa seeds. Acta Crystallogr F Struct Biol Commun 2015; 71:1282-5. [PMID: 26457519 PMCID: PMC4601592 DOI: 10.1107/s2053230x15015186] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 08/14/2015] [Indexed: 11/11/2022] Open
Abstract
Frutalin is an α-D-galactose-specific carbohydrate-binding glycoprotein with antitumour properties and is a powerful tool for tumour biomarker discovery. The crystallization and preliminary X-ray diffraction analysis of this lectin, which was isolated from Artocarpus incisa seeds, are reported here. Frutalin was purified and submitted to mass-spectrometric analysis. Diverse masses at approximately 16 kDa were observed in the deconvoluted spectra, which support the presence of isoforms. The best frutalin crystals were grown within a week in 0.1 M citric acid pH 3.5 which contained 25% PEG 3350 as a precipitant at 293 K, and diffracted to a maximum resolution of 1.81 Å. The monoclinic crystals belonged to space group I2, with unit-cell parameters a = 76.17, b = 74.56, c = 118.98 Å, β = 96.56°. A molecular-replacement solution was obtained which indicated the presence of four monomers per asymmetric unit. Crystallographic refinement of the structure is in progress.
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Affiliation(s)
| | - Humberto D’Muniz Pereira
- Physics Institute of São Carlos, São Paulo University, Avenida Trabalhador São-carlense 400, Parque Arnold Schimidt, 13566-590 São Carlos-SP, Brazil
| | - Antonio Eufrasio Vieira Neto
- Center of Experimental Biology (Nubex), University of Fortaleza (UNIFOR), 60811-905 Fortaleza-CE, Brazil
- Department of Biochemistry and Molecular Biology, Federal University of Ceará (UFC), Campus do Pici, Bloco 907, 60451-970 Fortaleza-CE, Brazil
| | | | - Marina Duarte Pinto Lobo
- Center of Experimental Biology (Nubex), University of Fortaleza (UNIFOR), 60811-905 Fortaleza-CE, Brazil
- Department of Biochemistry and Molecular Biology, Federal University of Ceará (UFC), Campus do Pici, Bloco 907, 60451-970 Fortaleza-CE, Brazil
| | - Felipe Domingos de Sousa
- Center of Experimental Biology (Nubex), University of Fortaleza (UNIFOR), 60811-905 Fortaleza-CE, Brazil
- Department of Biochemistry and Molecular Biology, Federal University of Ceará (UFC), Campus do Pici, Bloco 907, 60451-970 Fortaleza-CE, Brazil
| | - Renato de Azevedo Moreira
- Department of Biochemistry and Molecular Biology, Federal University of Ceará (UFC), Campus do Pici, Bloco 907, 60451-970 Fortaleza-CE, Brazil
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Han JW, Jung MG, Shim EY, Shim JB, Kim YM, Kim GH. Functional recombinants designed from a fetuin/asialofetuin-specific marine algal lectin, rhodobindin. Mar Drugs 2015; 13:2183-95. [PMID: 25871294 PMCID: PMC4413206 DOI: 10.3390/md13042183] [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: 02/10/2015] [Revised: 03/24/2015] [Accepted: 03/27/2015] [Indexed: 12/29/2022] Open
Abstract
Plant lectins have attracted much attention for biomedical applications including targeted drug delivery system and therapy against tumors and microbial infections. The main problem of using lectins as a biomedical tool is a batch-to-batch variation in isoforms content. The production of lectins using recombination tools has the advantage of obtaining high amounts of proteins with more precise properties, but there are only a handful of functional recombinant lectins presently available. A fetuin/asialo-fetuin specific lectin, Rhodobindin, has unique tandem repeats structure which makes it useful in exploiting for recombinant lectin. We developed three functional recombinant lectins using E. coli expression system: one from full cDNA sequence and two from fragmentary sequences of Rhodobindin. Hemagglutinating activity and solubility of the recombinant lectins were highest at OD 0.7 cell concentration at 20 °C. The optimized process developed in this study was suitable for the quality-controlled production of high amounts of soluble recombinant lectins.
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Affiliation(s)
- Jong Won Han
- Department of Biology, Kongju National University, Kongju 314-701, Korea; E-Mails: (J.W.H.); (M.G.J.); (E.Y.S.); (J.B.S.); (Y.M.K.)
- Marine Biodiversity Institute of Korea, Seocheon 427-100, Korea
| | - Min Gui Jung
- Department of Biology, Kongju National University, Kongju 314-701, Korea; E-Mails: (J.W.H.); (M.G.J.); (E.Y.S.); (J.B.S.); (Y.M.K.)
| | - Eun Young Shim
- Department of Biology, Kongju National University, Kongju 314-701, Korea; E-Mails: (J.W.H.); (M.G.J.); (E.Y.S.); (J.B.S.); (Y.M.K.)
| | - Jun Bo Shim
- Department of Biology, Kongju National University, Kongju 314-701, Korea; E-Mails: (J.W.H.); (M.G.J.); (E.Y.S.); (J.B.S.); (Y.M.K.)
| | - Young Min Kim
- Department of Biology, Kongju National University, Kongju 314-701, Korea; E-Mails: (J.W.H.); (M.G.J.); (E.Y.S.); (J.B.S.); (Y.M.K.)
| | - Gwang Hoon Kim
- Department of Biology, Kongju National University, Kongju 314-701, Korea; E-Mails: (J.W.H.); (M.G.J.); (E.Y.S.); (J.B.S.); (Y.M.K.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +82-41-8508504; Fax: +82-41-8508497
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Shimokawa M, Nsimba-Lubaki SM, Hayashi N, Minami Y, Yagi F, Hiemori K, Tateno H, Hirabayashi J. Two jacalin-related lectins from seeds of the African breadfruit (Treculia africana L.). Biosci Biotechnol Biochem 2014; 78:2036-44. [PMID: 25155899 DOI: 10.1080/09168451.2014.948376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Two jacalin-related lectins (JRLs) were purified by mannose-agarose and melibiose-agarose from seeds of Treculia africana. One is galactose-recognizing JRL (gJRL), named T. africana agglutinin-G (TAA-G), and another one is mannose-recognizing JRL (mJRL), TAA-M. The yields of the two lectins from the seed flour were approximately 7.0 mg/g for gJRL and 7.2 mg/g for mJRL. The primary structure of TAA-G was determined by protein sequencing of lysyl endopeptic peptides and chymotryptic peptides. The sequence identity of TAA-G to other gJRLs was around 70%. Two-residue insertion was found around the sugar-binding sites, compared with the sequences of other gJRLs. Crystallographic studies on other gJRLs have shown that the primary sugar-binding site of gJRLs can accommodate Gal, GalNAc, and GalNAc residue of T-antigen (Galβ1-3GalNAcα-). However, hemagglutination inhibition and glycan array showed that TAA-G did not recognize GalNAc itself and T-antigen. TAA-G preferred melibiose and core 3 O-glycan.
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Affiliation(s)
- Michiko Shimokawa
- a Biochemical Science and Technology, Faculty of Agriculture , Kagoshima University , Kagoshima , Japan
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12
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Costa S, Almeida A, Castro A, Domingues L. Fusion tags for protein solubility, purification and immunogenicity in Escherichia coli: the novel Fh8 system. Front Microbiol 2014. [PMID: 24600443 DOI: 10.3389/fmicb.2014.00063.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Proteins are now widely produced in diverse microbial cell factories. The Escherichia coli is still the dominant host for recombinant protein production but, as a bacterial cell, it also has its issues: the aggregation of foreign proteins into insoluble inclusion bodies is perhaps the main limiting factor of the E. coli expression system. Conversely, E. coli benefits of cost, ease of use and scale make it essential to design new approaches directed for improved recombinant protein production in this host cell. With the aid of genetic and protein engineering novel tailored-made strategies can be designed to suit user or process requirements. Gene fusion technology has been widely used for the improvement of soluble protein production and/or purification in E. coli, and for increasing peptide's immunogenicity as well. New fusion partners are constantly emerging and complementing the traditional solutions, as for instance, the Fh8 fusion tag that has been recently studied and ranked among the best solubility enhancer partners. In this review, we provide an overview of current strategies to improve recombinant protein production in E. coli, including the key factors for successful protein production, highlighting soluble protein production, and a comprehensive summary of the latest available and traditionally used gene fusion technologies. A special emphasis is given to the recently discovered Fh8 fusion system that can be used for soluble protein production, purification, and immunogenicity in E. coli. The number of existing fusion tags will probably increase in the next few years, and efforts should be taken to better understand how fusion tags act in E. coli. This knowledge will undoubtedly drive the development of new tailored-made tools for protein production in this bacterial system.
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Affiliation(s)
- Sofia Costa
- Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho Braga, Portugal ; Instituto Nacional de Saúde Dr. Ricardo Jorge Porto, Portugal
| | - André Almeida
- Hitag Biotechnology, Lad., Biocant, Parque Technologico de Cantanhede Cantanhede, Portugal
| | - António Castro
- Instituto Nacional de Saúde Dr. Ricardo Jorge Porto, Portugal
| | - Lucília Domingues
- Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho Braga, Portugal
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Costa S, Almeida A, Castro A, Domingues L. Fusion tags for protein solubility, purification and immunogenicity in Escherichia coli: the novel Fh8 system. Front Microbiol 2014; 5:63. [PMID: 24600443 PMCID: PMC3928792 DOI: 10.3389/fmicb.2014.00063] [Citation(s) in RCA: 235] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 01/30/2014] [Indexed: 01/19/2023] Open
Abstract
Proteins are now widely produced in diverse microbial cell factories. The Escherichia coli is still the dominant host for recombinant protein production but, as a bacterial cell, it also has its issues: the aggregation of foreign proteins into insoluble inclusion bodies is perhaps the main limiting factor of the E. coli expression system. Conversely, E. coli benefits of cost, ease of use and scale make it essential to design new approaches directed for improved recombinant protein production in this host cell. With the aid of genetic and protein engineering novel tailored-made strategies can be designed to suit user or process requirements. Gene fusion technology has been widely used for the improvement of soluble protein production and/or purification in E. coli, and for increasing peptide's immunogenicity as well. New fusion partners are constantly emerging and complementing the traditional solutions, as for instance, the Fh8 fusion tag that has been recently studied and ranked among the best solubility enhancer partners. In this review, we provide an overview of current strategies to improve recombinant protein production in E. coli, including the key factors for successful protein production, highlighting soluble protein production, and a comprehensive summary of the latest available and traditionally used gene fusion technologies. A special emphasis is given to the recently discovered Fh8 fusion system that can be used for soluble protein production, purification, and immunogenicity in E. coli. The number of existing fusion tags will probably increase in the next few years, and efforts should be taken to better understand how fusion tags act in E. coli. This knowledge will undoubtedly drive the development of new tailored-made tools for protein production in this bacterial system.
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Affiliation(s)
- Sofia Costa
- Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho Braga, Portugal ; Instituto Nacional de Saúde Dr. Ricardo Jorge Porto, Portugal
| | - André Almeida
- Hitag Biotechnology, Lad., Biocant, Parque Technologico de Cantanhede Cantanhede, Portugal
| | - António Castro
- Instituto Nacional de Saúde Dr. Ricardo Jorge Porto, Portugal
| | - Lucília Domingues
- Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho Braga, Portugal
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Oliveira C, Teixeira JA, Domingues L. Recombinant production of plant lectins in microbial systems for biomedical application - the frutalin case study. FRONTIERS IN PLANT SCIENCE 2014; 5:390. [PMID: 25152749 PMCID: PMC4126444 DOI: 10.3389/fpls.2014.00390] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Accepted: 07/22/2014] [Indexed: 05/02/2023]
Abstract
Frutalin is a homotetrameric partly glycosylated α-D-galactose-binding lectin of biomedical interest from Artocarpus incisa (breadfruit) seeds, belonging to the jacalin-related lectins family. As other plant lectins, frutalin is a heterogeneous mixture of several isoforms possibly with distinct biological activities. The main problem of using such lectins as biomedical tools is that "batch-to-batch" variation in isoforms content may lead to inconstant results. The production of lectins by recombinant means has the advantage of obtaining high amounts of proteins with defined amino-acid sequences and more precise properties. In this mini review, we provide the strategies followed to produce two different forms of frutalin in two different microbial systems: Escherichia coli and Pichia pastoris. The processing and functional properties of the recombinant frutalin obtained from these hosts are compared to those of frutalin extracted from breadfruit. Emphasis is given particularly to recombinant frutalin produced in P. pastoris, which showed a remarkable capacity as biomarker of human prostate cancer and as apoptosis-inducer of cancer cells. Recombinant frutalin production opens perspectives for its development as a new tool in human medicine.
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Affiliation(s)
| | | | - Lucília Domingues
- *Correspondence: Lucília Domingues, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal e-mail:
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Fernandez-del-Carmen A, Juárez P, Presa S, Granell A, Orzáez D. Recombinant jacalin-like plant lectins are produced at high levels in Nicotiana benthamiana and retain agglutination activity and sugar specificity. J Biotechnol 2013; 163:391-400. [PMID: 23220214 DOI: 10.1016/j.jbiotec.2012.11.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 11/26/2012] [Accepted: 11/28/2012] [Indexed: 12/11/2022]
Abstract
The plant kingdom is an underexplored source of valuable proteins which, like plant lectins, display unique interacting specificities. Furthermore, plant protein diversity remains under-exploited due to the low availability and heterogeneity of native sources. All these hurdles could be overcome with recombinant production. A narrow phylogenetic gap between the native source and the recombinant platform is likely to facilitate proper protein processing and stability; therefore, the plant cell chassis should be specially suited for the recombinant production of many plant native proteins. This is illustrated herein with the recombinant production of two representatives of the plant jacalin-related lectin (JRLs) protein family in Nicotiana benthamiana using state-of-the-art magnICON technology. Mannose-specific Banlec JRL was produced at very high levels in leaves, reaching 1.0mg of purified protein per gram of fresh weight and showing strong agglutination activity. Galactose-specific jacalin JRL, with its complicated processing requirements, was also successfully produced in N. benthamiana at levels of 0.25 mg of purified protein per gram of fresh weight. Recombinant Jacalin (rJacalin) proved efficient in the purification of human IgA1, and was able to discriminate between plant-made and native IgA1 due to their differential glycosylation status. Together, these results show that the plant cell factory should be considered a primary option in the recombinant production of valuable plant proteins.
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Affiliation(s)
- Asun Fernandez-del-Carmen
- Instituto de Biología Molecular y Celular de Plantas-IBMCP, Consejo Superior de Investigaciones Científicas, Universidad Politécnica de Valencia, Avda Tarongers SN, 46022 Valencia, Spain
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Costa SJ, Almeida A, Castro A, Domingues L, Besir H. The novel Fh8 and H fusion partners for soluble protein expression in Escherichia coli: a comparison with the traditional gene fusion technology. Appl Microbiol Biotechnol 2012; 97:6779-91. [PMID: 23160981 DOI: 10.1007/s00253-012-4559-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 10/24/2012] [Accepted: 10/28/2012] [Indexed: 12/22/2022]
Abstract
The Escherichia coli host system is an advantageous choice for simple and inexpensive recombinant protein production but it still presents bottlenecks at expressing soluble proteins from other organisms. Several efforts have been taken to overcome E. coli limitations, including the use of fusion partners that improve protein expression and solubility. New fusion technologies are emerging to complement the traditional solutions. This work evaluates two novel fusion partners, the Fh8 tag (8 kDa) and the H tag (1 kDa), as solubility enhancing tags in E. coli and their comparison to commonly used fusion partners. A broad range comparison was conducted in a small-scale screening and subsequently scaled-up. Six difficult-to-express target proteins (RVS167, SPO14, YPK1, YPK2, Frutalin and CP12) were fused to eight fusion tags (His, Trx, GST, MBP, NusA, SUMO, H and Fh8). The resulting protein expression and solubility levels were evaluated by sodium dodecyl sulfate polyacrylamide gel electrophoresis before and after protein purification and after tag removal. The Fh8 partner improved protein expression and solubility as the well-known Trx, NusA or MBP fusion partners. The H partner did not function as a solubility tag. Cleaved proteins from Fh8 fusions were soluble and obtained in similar or higher amounts than proteins from the cleavage of other partners as Trx, NusA or MBP. The Fh8 fusion tag therefore acts as an effective solubility enhancer, and its low molecular weight potentially gives it an advantage over larger solubility tags by offering a more reliable assessment of the target protein solubility when expressed as a fusion protein.
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Affiliation(s)
- Sofia J Costa
- IBB - Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057, Portugal, Portugal
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Oliveira C, Teixeira JA, Domingues L. Recombinant lectins: an array of tailor-made glycan-interaction biosynthetic tools. Crit Rev Biotechnol 2012; 33:66-80. [DOI: 10.3109/07388551.2012.670614] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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18
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Neto LGDN, Pinto LDS, Bastos RM, Evaristo FFV, de Vasconcelos MA, Carneiro VA, Arruda FVS, Porto ALF, Leal RB, Júnior VADS, Cavada BS, Teixeira EH. Effect of the lectin of Bauhinia variegata and its recombinant isoform on surgically induced skin wounds in a murine model. Molecules 2011; 16:9298-315. [PMID: 22064270 PMCID: PMC6264313 DOI: 10.3390/molecules16119298] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 10/20/2011] [Accepted: 10/27/2011] [Indexed: 11/16/2022] Open
Abstract
Lectins are a structurally heterogeneous group of highly specific carbohydrate-binding proteins. Due to their great biotechnological potential, lectins are widely used in biomedical research. The purpose of the present study was to evaluate the healing potential of the lectin of Bauhinia variegata (nBVL) and its recombinant isoform (rBVL-1). Following surgical creation of dorsal skin wounds, seven groups of mice were submitted to topical treatment for 12 days with lectin, D-galactose, BSA and saline. The animals were anesthetized and euthanized on POD 2, 7 and 12 in order to evaluate the healing potential of each treatment. The parameters considered included wound size, contraction rate, epithelialization rate and histopathological findings. Wound closure was fastest in animals treated with rBVL-1 (POD 7). nBVL was more effective than the controls. All skin layers were reconstructed and keratin deposition increased. Our findings indicate that the lectin of Bauhinia variegata possesses pro-healing properties and may be employed in the treatment of acute skin wounds.
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Affiliation(s)
- Luiz Gonzaga do Nascimento Neto
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
| | - Luciano da Silva Pinto
- Center for Technological Development (CDTec), Unidad of Biotecnology, Federal University of Pelotas, Pelotas, Rio Grande do Sul, 96010-900, Brazil; E-Mail: (L.d.S.P.)
| | - Rafaela Mesquita Bastos
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
| | - Francisco Flávio Vasconcelos Evaristo
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
| | - Mayron Alves de Vasconcelos
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará 60451-970, Brazil; E-Mails: (M.A.V.); (B.S.C.)
| | - Victor Alves Carneiro
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
| | - Francisco Vassiliepe Sousa Arruda
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
| | - Ana Lúcia Figueiredo Porto
- Department of Animal Morphology and Physiology, Federal Rural University of Pernambuco, Recife, Pernambuco 52171-900, Brazil; E-Mails: (A.L.F.P.); (V.A.d.S.J.)
| | - Rodrigo Bainy Leal
- Department of Biochemistry, CBB, Federal University of Santa Catarina, Santa Catarina 88040-970, Brazil; E-Mail: (B.B.L.)
| | - Valdemiro Amaro da Silva Júnior
- Department of Animal Morphology and Physiology, Federal Rural University of Pernambuco, Recife, Pernambuco 52171-900, Brazil; E-Mails: (A.L.F.P.); (V.A.d.S.J.)
| | - Benildo Sousa Cavada
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará 60451-970, Brazil; E-Mails: (M.A.V.); (B.S.C.)
| | - Edson Holanda Teixeira
- Integrated Laboratory of Biomolecules (LIBS), School of Medicine of the Federal University of Ceará, Sobral, Ceará 62042-280, Brazil; E-Mails: (L.G.N.N.); (R.M.B.); (F.F.V.E.); (V.A.C.); (F.V.S.A.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +55-88-3611-8000; Fax: +55-88-3611-2202
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Cytotoxic effects of native and recombinant frutalin, a plant galactose-binding lectin, on HeLa cervical cancer cells. J Biomed Biotechnol 2011; 2011:568932. [PMID: 22131813 PMCID: PMC3206378 DOI: 10.1155/2011/568932] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Revised: 08/17/2011] [Accepted: 08/17/2011] [Indexed: 02/07/2023] Open
Abstract
Frutalin is the α-D-galactose-binding lectin isolated from breadfruit seeds. Frutalin was obtained from two different sources: native frutalin was purified from its natural origin, and recombinant frutalin was produced and purified from Pichia pastoris. This work aimed to study and compare the effect of native and recombinant frutalin on HeLa cervical cancer cells proliferation and apoptosis. Furthermore, the interaction between frutalin and the HeLa cells was investigated by confocal microscopy. Despite having different carbohydrate-binding affinities, native and recombinant frutalin showed an identical magnitude of cytotoxicity on HeLa cells growth (IC₅₀~100 μg/mL) and equally induced cell apoptosis. The interaction studies showed that both lectins were rapidly internalised and targeted to HeLa cell's nucleus. Altogether, these results indicate that frutalin action is not dependent on its sugar-binding properties. This study provides important information about the bioactivity of frutalin and contributes to the understanding of the plant lectins cytotoxic activity.
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Larentis AL, Sampaio HDCC, Martins OB, Rodrigues MI, Alves TLM. Influence of induction conditions on the expression of carbazole dioxygenase components (CarAa, CarAc, and CarAd) from Pseudomonas stutzeri in recombinant Escherichia coli using experimental design. J Ind Microbiol Biotechnol 2010; 38:1045-54. [PMID: 20953895 DOI: 10.1007/s10295-010-0879-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2010] [Accepted: 09/15/2010] [Indexed: 10/18/2022]
Abstract
Carbazole 1,9a-dioxygenase (CarA), the first enzyme in the carbazole degradation pathway used by Pseudomonas sp., was expressed in E. coli under different conditions defined by experimental design. This enzyme depends on the coexistence of three components containing [2Fe-2S] clusters: CarAa, CarAc, and CarAd. The catalytic site is present in CarAa. The genes corresponding to components of carbazole 1,9a-dioxygenase from P. stutzeri were cloned and expressed by salt induction in E. coli BL21-SI (a host that allows the enhancement of overexpressed proteins in the soluble fraction), using the vector pDEST™14. The expression of these proteins was performed under different induction conditions (cell concentration, temperature, and time), with the help of two-level factorial design. Cell concentration at induction (measured by absorbance at 600 nm) was tested at 0.5 and 0.8. After salt induction, expression was performed at 30 and 37°C, for 4 h and 24 h. Protein expression was evaluated by densitometry analysis. Expression of CarAa was enhanced by induction at a lower cell concentration and temperature and over a longer time, according to the analysis of the experimental design results. The results were validated at Abs (ind) = 0.3, 25°C, and 24 h, at which CarAa expression was three times higher than under the standard condition. The behavior of CarAc and CarAd was the inverse, with the best co-expression condition tested being the standard one (Abs (ind) = 0.5, T = 37°C, and t = 4 h). The functionality of the proteins expressed in E. coli was confirmed by the degradation of 20 ppm carbazole.
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Affiliation(s)
- Ariane Leites Larentis
- Laboratório de Bioprocessos, Universidade Federal do Rio de Janeiro-UFRJ, Centro de Tecnologia (CT), G115, Cidade Universitária, Ilha do Fundão, Caixa Postal 68502, Rio de Janeiro, RJ, 21945-970, Brazil.
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21
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Lam SK, Ng TB. Lectins: production and practical applications. Appl Microbiol Biotechnol 2010; 89:45-55. [PMID: 20890754 PMCID: PMC3016214 DOI: 10.1007/s00253-010-2892-9] [Citation(s) in RCA: 172] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2010] [Revised: 09/12/2010] [Accepted: 09/12/2010] [Indexed: 11/26/2022]
Abstract
Lectins are proteins found in a diversity of organisms. They possess the ability to agglutinate erythrocytes with known carbohydrate specificity since they have at least one non-catalytic domain that binds reversibly to specific monosaccharides or oligosaccharides. This articles aims to review the production and practical applications of lectins. Lectins are isolated from their natural sources by chromatographic procedures or produced by recombinant DNA technology. The yields of animal lectins are usually low compared with the yields of plant lectins such as legume lectins. Lectins manifest a diversity of activities including antitumor, immunomodulatory, antifungal, HIV-1 reverse transcriptase inhibitory, and anti-insect activities, which may find practical applications. A small number of lectins demonstrate antibacterial and anti-nematode activities.
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Affiliation(s)
- Sze Kwan Lam
- Division of Respiratory Medicine, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Tzi Bun Ng
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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Hsieh JM, Besserer GM, Madej MG, Bui HQ, Kwon S, Abramson J. Bridging the gap: a GFP-based strategy for overexpression and purification of membrane proteins with intra and extracellular C-termini. Protein Sci 2010; 19:868-80. [PMID: 20196076 DOI: 10.1002/pro.365] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Low expression and instability during isolation are major obstacles preventing adequate structure-function characterization of membrane proteins (MPs). To increase the likelihood of generating large quantities of protein, C-terminally fused green fluorescent protein (GFP) is commonly used as a reporter for monitoring expression and evaluating purification. This technique has mainly been restricted to MPs with intracellular C-termini (C(in)) due to GFP's inability to fluoresce in the Escherichia coli periplasm. With the aid of Glycophorin A, a single transmembrane spanning protein, we developed a method to convert MPs with extracellular C-termini (C(out)) to C(in) ones providing a conduit for implementing GFP reporting. We tested this method on eleven MPs with predicted C(out) topology resulting in high level expression. For nine of the eleven MPs, a stable, monodisperse protein-detergent complex was identified using an extended fluorescence-detection size exclusion chromatography procedure that monitors protein stability over time, a critical parameter affecting the success of structure-function studies. Five MPs were successfully cleaved from the GFP tag by site-specific proteolysis and purified to homogeneity. To address the challenge of inefficient proteolysis, we explored expression and purification conditions in the absence of the fusion tag. Contrary to previous studies, optimal expression conditions established with the fusion were not directly transferable for overexpression in the absence of the GFP tag. These studies establish a broadly applicable method for GFP screening of MPs with C(out) topology, yielding sufficient protein suitable for structure-function studies and are superior to expression and purification in the absence GFP fusion tagging.
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Affiliation(s)
- Jennifer M Hsieh
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA
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Varejão N, Almeida MDS, De Cicco NNT, Atella GC, Coelho LCBB, Correia MATS, Foguel D. Heterologous expression and purification of a biologically active legume lectin from Cratylia mollis seeds (CRAMOLL 1). BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2010; 1804:1917-24. [PMID: 20538076 DOI: 10.1016/j.bbapap.2010.06.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 05/31/2010] [Accepted: 06/01/2010] [Indexed: 10/19/2022]
Abstract
CRAMOLL 1 is a mannose/glucose isolectin isolated from Cratylia mollis seeds. This lectin has 82% sequence identity with Con A and essentially the same quaternary structure. As with Con A, CRAMOLL 1 seems to undergo complex post-translational processing which makes it difficult to the use of traditional molecular cloning for heterologous expression. Here we report the expression and purification of functional recombinant CRAMOLL 1 (rCRAMOLL 1) in Escherichia coli. This was accomplished by introducing a chemically synthesized DNA encoding the mature CRAMOLL 1 amino acid sequence into a bacterial expression vector under T7 promoter control. Most of the recombinant lectin was found in insoluble aggregates (inclusion bodies), but we were able to recover reasonable amounts of soluble lectin in the active form by decreasing the protein induction temperature. The recombinant lectin was purified to homogeneity with one-step affinity chromatography. The plant CRAMOLL 1 (pCRAMOLL 1) and rCRAMOLL 1 share several physicochemical properties such as molecular mass, charge density and secondary and tertiary structures. However, pCRAMOLL 1 has a lower thermodynamic stability than rCRAMOLL 1 when probed by acidification, high temperature or high hydrostatic pressure, and this is probably caused by the presence of tetramers composed of fragmented monomers, which are formed in the plant cotyledon but absent from the recombinant protein. rCRAMOLL 1 behaves identically to its plant counterpart with respect to its specificity for monosaccharides, and to its agglutinating activities against rabbit erythrocytes and Trypanosoma cruzi epimastigote cells.
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Affiliation(s)
- Nathalia Varejão
- Instituto de Bioquímica Médica, Programa de Biologia Estrutural, Centro Nacional de Ressonância Magnética Nuclear de Macromoléculas, Universidade Federal do Rio de Janeiro, Av. Bauhínia, 400, 21941-590, Rio de Janeiro, RJ, Brazil
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