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Gómez E, Galván-Hidalgo JM, Pérez-Cuéllar G, Huerta-Landa KA, González-Hernández A, Gómez-García O, Andrade-Pavón D, Ramírez-Apan T, Rodríguez Hernández KD, Hernández S, Cano-Sánchez P, Gómez-Velasco H. New Organotin (IV) Compounds Derived from Dehydroacetic Acid and Thiosemicarbazides: Synthesis, Rational Design, Cytotoxic Evaluation, and Molecular Docking Simulation. Bioinorg Chem Appl 2023; 2023:7901843. [PMID: 37920233 PMCID: PMC10620030 DOI: 10.1155/2023/7901843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/17/2023] [Accepted: 10/06/2023] [Indexed: 11/04/2023] Open
Abstract
Organotin complexes were prepared through a one-pot reaction with three components by reacting thiosemicarbazide or 4-methyl-3-thiosemicarbazide or 4-phenylthiosemicarbazide, dehydroacetic acid (DHA) and dibutyl, diphenyl, dicyclohexyl, and bis[(trimethylsilyl)methyl]tin(IV) oxides; all complexes were characterized by infrared (IR), ultraviolet-visible (UV-vis), mass spectrometry (MS), and nuclear magnetic resonance (NMR) spectroscopy. The 119Sn NMR revealed chemical shifts corresponding to a pentacoordinated environment in solution. The X-ray crystallography of the two complexes evidenced the formation of monomeric complexes with a pentacoordinated geometry around tin via three donor atoms from the ligand, the sulfur of the thiol, the nitrogen of the imine group, and the oxygen of the pyran ring. The geometries of the five-coordinated complexes 3a (Bu2SnL3), 3c (Ph2SnL3), and 3d (Cy2SnL3) acid were intermediate between square pyramidal and trigonal bipyramidal, and complex 1a (Bu2SnL1) adopted a bipyramidal trigonal geometry (BPT). The sulforhodamine B assay assessed the cytotoxicity of organotin(IV) complexes against the MDA-MB-231 and MCF-7 (human mammary adenocarcinoma) cell lines and one normal COS-7 (African green monkey kidney fibroblast). The IC50 values evidenced a significant antiproliferative effect on cancer cells; the complexes were more potent than the positive cisplatin control and the corresponding ligands, dehydroacetic acid thiosemicarbazone (L1), dehydroacetic acid-N(4)-methylthiosemicarbazone (L2), and dehydroacetic acid-N(4)-phenylthiosemicarbazone (L3). The IC50 values also indicated that the organotin(IV) complexes were more cytotoxic against the triple-negative breast cell line MDA-MB-231 than MCF-7, inducing significant morphological alterations. The interactions of organotin(IV) 1c (Ph2SnL1), 1d (Cy2SnL1), and 1e (((CH3)3SiCH2)2SnL1) were evaluated with ss-DNA by fluorescence; intensity changes of the fluorescence were indicative of the displacement of ethidium bromide (EB), confirming the interaction of the organotin(IV) complexes with ss-DNA; the results showed a DNA binding affinity. The thermodynamic parameters obtained through isothermal titration calorimetry showed that the interaction of 1c (Ph2SnL1), with ss-ADN, was exothermic. Molecular docking studies also demonstrated that the organotin(IV) complexes were intercalated in DNA by conventional hydrogen bonds, carbon-hydrogen bonds, and π-alkyl interactions. These complexes furthermore showed a greater affinity towards DNA than cisplatin.
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Affiliation(s)
- Elizabeth Gómez
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Alcaldía Coyoacán, C. P. 04510, Ciudad de México, Mexico
| | - José Miguel Galván-Hidalgo
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Alcaldía Coyoacán, C. P. 04510, Ciudad de México, Mexico
| | - Guillermo Pérez-Cuéllar
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Alcaldía Coyoacán, C. P. 04510, Ciudad de México, Mexico
| | - Karoline Alondra Huerta-Landa
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Alcaldía Coyoacán, C. P. 04510, Ciudad de México, Mexico
| | - Arturo González-Hernández
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Alcaldía Coyoacán, C. P. 04510, Ciudad de México, Mexico
| | - Omar Gómez-García
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, Colonia Santo Tomás 11340, Ciudad de México, Mexico
| | - Dulce Andrade-Pavón
- Departamento Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, Colonia Santo Tomás 11340, Ciudad de México, Mexico
- Departamento Fisiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Av. Wilfrido Massieu 399, Colonia Nueva Industrial Vallejo 07738, Ciudad de México, Mexico
| | - Teresa Ramírez-Apan
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Alcaldía Coyoacán, C. P. 04510, Ciudad de México, Mexico
| | - Karla Daniela Rodríguez Hernández
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Alcaldía Coyoacán, C. P. 04510, Ciudad de México, Mexico
| | - Simón Hernández
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Alcaldía Coyoacán, C. P. 04510, Ciudad de México, Mexico
| | - Patricia Cano-Sánchez
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Alcaldía Coyoacán, C. P. 04510, Ciudad de México, Mexico
| | - Homero Gómez-Velasco
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Alcaldía Coyoacán, C. P. 04510, Ciudad de México, Mexico
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2
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López-Giraldo E, Carrillo E, Titaux-Delgado G, Cano-Sánchez P, Colorado A, Possani LD, Río-Portilla FD. Structural and functional studies of scorpine: A channel blocker and cytolytic peptide. Toxicon 2023; 222:106985. [PMID: 36436588 DOI: 10.1016/j.toxicon.2022.106985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/09/2022] [Accepted: 11/23/2022] [Indexed: 11/25/2022]
Abstract
Scorpine is an antimicrobial and antimalarial peptide isolated from Pandinus imperator scorpion venom. As there are few functional and structural studies reported on scorpine-like peptides, we investigated the recombinant truncated N- and C-terminal domains as well as complete scorpine using biological assays and determined the N- and C-terminal structures using solution nuclear magnetic resonance. The study was conducted using recombinant N- and C-terminal peptides and complete scorpine expressed in Escherichia coli. The results showed that N-scorpine presented a random coil structure in water and adopted α-helical folding in the presence of 50% trifluoroethanol (TFE). C-scorpine contains three disulfide bonds with two structural domains: an unstructured N-terminal domain in water that can form a typical secondary alpha-helix structure in 50% TFE and a C-terminal domain with the CS-αβ motif. Our findings demonstrate cytolytic activity associated with C-scorpine, N-scorpine, and scorpine, as well as channel blocking activity associated with the C-scorpine domain.
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Affiliation(s)
| | - Elisa Carrillo
- Center for Membrane Biology, Department of Biochemistry and Molecular Biology, University of Texas Health Science Center at Houston, Houston, TX, USA
| | | | | | - Alland Colorado
- Instituto de Química, Universidad Nacional Autónoma de México, CdMx, Mexico
| | - Lourival D Possani
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
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3
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García-Ramírez B, Mares-Mejía I, Rodríguez-Hernández A, Cano-Sánchez P, Torres-Larios A, Ortega E, Rodríguez-Romero A. A native IgE in complex with profilin provides insights into allergen recognition and cross-reactivity. Commun Biol 2022; 5:748. [PMID: 35902770 PMCID: PMC9334453 DOI: 10.1038/s42003-022-03718-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 07/14/2022] [Indexed: 12/01/2022] Open
Abstract
Allergies have become a rising health problem, where plentiful substances can trigger IgE-mediated allergies in humans. While profilins are considered minor allergens, these ubiquitous proteins are primary molecules involved in cross-reactivity and pollen-food allergy syndrome. Here we report the first crystal structures of murine Fab/IgE, with its chains naturally paired, in complex with the allergen profilin from Hevea brasiliensis (Hev b 8). The crystallographic models revealed that the IgE's six complementarity-determining regions (CDRs) interact with the allergen, comprising a rigid paratope-epitope surface of 926 Å2, which includes an extensive network of interactions. Interestingly, we also observed previously unreported flexibility at Fab/IgE's elbow angle, which did not influence the shape of the paratope. The Fab/IgE exhibits a high affinity for Hev b 8, even when using 1 M NaCl in BLI experiments. Finally, based on the encouraging cross-reactivity assays using two mutants of the maize profilin (Zea m 12), this antibody could be a promising tool in IgE engineering for diagnosis and research applications.
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Affiliation(s)
- Benjamín García-Ramírez
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán, Ciudad de México, 04510, Mexico
| | - Israel Mares-Mejía
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán, Ciudad de México, 04510, Mexico
| | - Annia Rodríguez-Hernández
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán, Ciudad de México, 04510, Mexico
| | - Patricia Cano-Sánchez
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán, Ciudad de México, 04510, Mexico
| | - Alfredo Torres-Larios
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán, Ciudad de México, 04510, Mexico
| | - Enrique Ortega
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán, Ciudad de México, 04510, Mexico
| | - Adela Rodríguez-Romero
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, Coyoacán, Ciudad de México, 04510, Mexico.
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4
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Sosa-Peinado A, León-Cruz E, Velázquez-López I, Matuz-Mares D, Cano-Sánchez P, González-Andrade M. Theoretical-experimental studies of calmodulin-peptide interactions at different calcium equivalents. J Biomol Struct Dyn 2022; 40:2689-2700. [DOI: 10.1080/07391102.2020.1841679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | - Erika León-Cruz
- Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | | | - Deyamira Matuz-Mares
- Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Patricia Cano-Sánchez
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad de México, México
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5
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Jiménez-Arreola BS, Aguilar-Ramírez E, Cano-Sánchez P, Morales-Jiménez J, González-Andrade M, Medina-Franco JL, Rivera-Chávez J. Dimeric phenalenones from Talaromyces sp. (IQ-313) inhibit hPTP1B1-400: Insights into mechanistic kinetics from in vitro and in silico studies. Bioorg Chem 2020; 101:103893. [DOI: 10.1016/j.bioorg.2020.103893] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 03/13/2020] [Accepted: 04/27/2020] [Indexed: 12/27/2022]
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6
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Rivera-Chávez J, Bustos-Brito C, Aguilar-Ramírez E, Martínez-Otero D, Rosales-Vázquez LD, Dorazco-González A, Cano-Sánchez P. Hydroxy- neo-Clerodanes and 5,10- seco- neo-Clerodanes from Salvia decora. J Nat Prod 2020; 83:2212-2220. [PMID: 32597650 DOI: 10.1021/acs.jnatprod.0c00313] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Preliminary analysis of the mass spectrometric (MS) and NMR spectroscopic data of the primary fractions from the biologically active extract of Salvia decora revealed spectra that are characteristic for neo-clerodane-type diterpenoids. MS-guided isolation of the bioactive fractions led to the isolation of three new chemical entities, including two hydroxy-neo-clerodanes (1 and 2) and one acylated 5,10-seco-neo-clerodane (3), along with three known diterpenoids (4-6), ursolic acid (7), and eupatorin (8). The structures of the new compounds were established by analysis of the 1D and 2D NMR and MS data, whereas their absolute configuration was deduced using a combination of experimental and theoretical ECD data and confirmed by X-ray crystallography (1 and 4). Furthermore, compounds 1, 3, 4, and 6-8 were evaluated as hPTP1B1-400 (human protein tyrosine phosphatase) inhibitors, where 7 showed the best activity, with an IC50 value in the lower μM range. Additionally, compound 7 was evaluated as an α-glucosidase inhibitor. The affinity constant of the 7-hPTP1B1-400 complex was determined by quenching fluorescence experiments (ka = 1.3 × 104 M-1), while the stoichiometry ratio (1:1 protein-ligand) was determined by a continuous variation method.
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Affiliation(s)
- José Rivera-Chávez
- Departamento de Productos Naturales, Instituto de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Ciudad de México, Mexico
| | - Celia Bustos-Brito
- Departamento de Productos Naturales, Instituto de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Ciudad de México, Mexico
| | - Enrique Aguilar-Ramírez
- Departamento de Productos Naturales, Instituto de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Ciudad de México, Mexico
| | - Diego Martínez-Otero
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco, Toluca, 50200, Mexico
| | - Luis D Rosales-Vázquez
- Departamento de Quı́mica Inorgánica, Instituto de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Ciudad de México, Mexico
| | - Alejandro Dorazco-González
- Departamento de Quı́mica Inorgánica, Instituto de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Ciudad de México, Mexico
| | - Patricia Cano-Sánchez
- Departamento de Quı́mica de Biomacromoléculas, Instituto de Quı́mica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Ciudad de México, Mexico
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7
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Victorio-De Los Santos M, Vibanco-Pérez N, Soto-Rodriguez S, Pereyra A, Zenteno E, Cano-Sánchez P. The B Subunit of PirAB vp Toxin Secreted from Vibrio parahaemolyticus Causing AHPND Is an Amino Sugar Specific Lectin. Pathogens 2020; 9:E182. [PMID: 32138213 PMCID: PMC7157558 DOI: 10.3390/pathogens9030182] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 02/17/2020] [Accepted: 02/29/2020] [Indexed: 11/26/2022] Open
Abstract
Vibrio parahaemolyticus (Vp) is the etiological agent of the acute hepatopancreatic necrosis disease (AHPND) in Penaeus vannamei shrimp. Vp possesses a 63-70 kb conjugative plasmid that encodes the binary toxin PirAvp/PirBvp. The 250 kDa PirABvp complex was purified by affinity chromatography with galactose-sepharose 4B and on a stroma from glutaraldehyde-fixed rat erythrocytes column, as a heterotetramer of PirAvp and PirBvp subunits. In addition, recombinant pirB (rPirBvp) and pirA (rPirAvp) were obtained. The homogeneity of the purified protein was determined by SDS-PAGE analysis, and the yield of protein was 488 ng/100 μg of total protein of extracellular products. The PirABvp complex and the rPirBvp showed hemagglutinating activity toward rat erythrocytes. The rPirAvp showed no hemagglutinating capacity toward the animal red cells tested. Among different mono and disaccharides tested, only GalNH2 and GlcNH2 were able to inhibit hemagglutination of the PirABvp complex and the rPirBvp. Glycoproteins showed inhibitory specificity, and fetuin was the glycoprotein that showed the highest inhibition. Other glycoproteins, such as mucin, and glycosaminoglycans, such as heparin, also inhibited the activity. Desialylation of erythrocytes enhanced the hemagglutinating activity. This confirms that Gal or Gal (β1,4) GlcNAc are the main ligands for PirABvp. The agglutinating activity of the PirABvp complex and the rPirBvp is not dependent on cations, because addition of Mg2+ or Ca2+ showed no effect on the protein capacity. Our results strongly suggest that the PirBvp subunit is a lectin, which is part of the PirA/PirBvp complex, and it seems to participate in bacterial pathogenicity.
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Affiliation(s)
- Marcelo Victorio-De Los Santos
- Laboratorio de Bacteriología. Centro de Investigación en Alimentación y Desarrollo, A.C. Unidad de Acuacultura y Manejo Ambiental, Av. Sábalo-Cerritos S/N A.P. 711, Mazatlán, Sinaloa 82112, Mexico
- Laboratorio de Investigación en Biología Molecular e Inmunología, Unidad Académica de Ciencias Químico Biológicas y Farmacéuticas, Universidad Autónoma de Nayarit, Ciudad de la Cultura, Tepic, Nayarit 63190, Mexico
| | - Norberto Vibanco-Pérez
- Laboratorio de Investigación en Biología Molecular e Inmunología, Unidad Académica de Ciencias Químico Biológicas y Farmacéuticas, Universidad Autónoma de Nayarit, Ciudad de la Cultura, Tepic, Nayarit 63190, Mexico
| | - Sonia Soto-Rodriguez
- Laboratorio de Bacteriología. Centro de Investigación en Alimentación y Desarrollo, A.C. Unidad de Acuacultura y Manejo Ambiental, Av. Sábalo-Cerritos S/N A.P. 711, Mazatlán, Sinaloa 82112, Mexico
| | - Ali Pereyra
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacan, CDMX 04510, Mexico; (A.P.); (E.Z.)
| | - Edgar Zenteno
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacan, CDMX 04510, Mexico; (A.P.); (E.Z.)
| | - Patricia Cano-Sánchez
- Laboratorio de Biología Molecular, Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacan, CDMX 04510, Mexico;
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8
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Sierra-Gómez Y, Rodríguez-Hernández A, Cano-Sánchez P, Gómez-Velasco H, Hernández-Santoyo A, Siliqi D, Rodríguez-Romero A. A biophysical and structural study of two chitinases from Agave tequilana and their potential role as defense proteins. FEBS J 2019; 286:4778-4796. [PMID: 31291689 DOI: 10.1111/febs.14993] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 05/04/2019] [Accepted: 07/08/2019] [Indexed: 01/09/2023]
Abstract
Plant chitinases are enzymes that have several functions, including providing protection against pathogens. Agave tequilana is an economically important plant that is poorly studied. Here, we identified a chitinase from short reads of the A. tequilana transcriptome (AtChi1). A second chitinase, differing by only six residues from the first, was isolated from total RNA of plants infected with Fusarium oxysporum (AtChi2). Both enzymes were overexpressed in Escherichia coli and analysis of their sequences indicated that they belong to the class I glycoside hydrolase family19, whose members exhibit two domains: a carbohydrate-binding module and a catalytic domain, connected by a flexible linker. Activity assays and thermal shift experiments demonstrated that the recombinant Agave enzymes are highly thermostable acidic endochitinases with Tm values of 75 °C and 71 °C. Both exhibit a molecular mass close to 32 kDa, as determined by MALDI-TOF, and experimental pIs of 3.7 and 3.9. Coupling small-angle x-ray scattering information with homology modeling and docking simulations allowed us to structurally characterize both chitinases, which notably show different interactions in the binding groove. Even when the six different amino acids are all exposed to solvent in the loops located near the linker and opposite to the binding site, they confer distinct kinetic parameters against colloidal chitin and similar affinity for (GlnNAc)6, as shown by isothermal titration calorimetry. Interestingly, binding is more enthalpy-driven for AtChi2. Whereas the physiological role of these chitinases remains unknown, we demonstrate that they exhibit important antifungal activity against chitin-rich fungi such as Aspergillus sp. DATABASE: SAXS structural data are available in the SASBDB database with accession numbers SASDDE7 and SASDDA6. ENZYMES: Chitinases (EC3.2.1.14).
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Affiliation(s)
- Yusvel Sierra-Gómez
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | | | - Patricia Cano-Sánchez
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Homero Gómez-Velasco
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | | | - Dritan Siliqi
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Bari, Italy
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9
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Leyva E, Medrano-Cerano JL, Cano-Sánchez P, López-González I, Gómez-Velasco H, del Río-Portilla F, García-Hernández E. Bacterial expression, purification and biophysical characterization of wheat germ agglutinin and its four hevein-like domains. Biopolymers 2018; 110:e23242. [DOI: 10.1002/bip.23242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 10/25/2018] [Accepted: 11/07/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Eduardo Leyva
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Jorge L. Medrano-Cerano
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Patricia Cano-Sánchez
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Itzel López-González
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Homero Gómez-Velasco
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Federico del Río-Portilla
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
| | - Enrique García-Hernández
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; México Mexico
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10
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Titaux-Delgado G, Carrillo E, Mendoza A, Mayorga-Flores M, Escobedo-González FC, Cano-Sánchez P, López-Vera E, Corzo G, Del Rio-Portilla F. Successful refolding and NMR structure of rMagi3: A disulfide-rich insecticidal spider toxin. Protein Sci 2018; 27:692-701. [PMID: 29247580 DOI: 10.1002/pro.3363] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 12/12/2017] [Accepted: 12/14/2017] [Indexed: 11/07/2022]
Abstract
The need for molecules with high specificity against noxious insects leads the search towards spider venoms that have evolved highly selective toxins for insect preys. In this respect, spiders as a highly diversified group of almost exclusive insect predators appear to possess infinite potential for the discovery of novel insect-selective toxins. In 2003, a group of toxins was isolated from the spider Macrothele gigas and the amino acid sequence was reported. We obtained, by molecular biology techniques in a heterologous system, one of these toxins. Purification process was optimized by chromatographic methods to determine the three-dimensional structure by nuclear magnetic resonance in solution, and, finally, their biological activity was tested. rMagi3 resulted to be a specific insect toxin with no effect on mice.
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Affiliation(s)
- Gustavo Titaux-Delgado
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, CU, Ciudad de México, 04510, México
| | - Elisa Carrillo
- Laboratorio de Toxinología Marina, Unidad Académica de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, México
| | - Angeles Mendoza
- División de Ciencias e Ingenierías, Campus León, Universidad de Guanajuato, Loma del Bosque 103, Col. Lomas del Campestre León, Gto, 37150, México
| | - Marlen Mayorga-Flores
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, CU, Ciudad de México, 04510, México
| | - Fátima C Escobedo-González
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, CU, Ciudad de México, 04510, México
| | - Patricia Cano-Sánchez
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, CU, Ciudad de México, 04510, México
| | - Estuardo López-Vera
- Laboratorio de Toxinología Marina, Unidad Académica de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, México
| | - Gerardo Corzo
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 61500, México
| | - Federico Del Rio-Portilla
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, CU, Ciudad de México, 04510, México
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11
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García-Maldonado E, Cano-Sánchez P, Hernández-Santoyo A. Molecular and functional characterization of a glycosylated Galactose-Binding lectin from Mytilus californianus. Fish Shellfish Immunol 2017; 66:564-574. [PMID: 28546025 DOI: 10.1016/j.fsi.2017.05.057] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 04/04/2017] [Accepted: 05/21/2017] [Indexed: 06/07/2023]
Abstract
Lectins play crucial roles for innate immune responses in invertebrates by recognizing and eliminating pathogens. In this study, a lectin from the mussel Mytilus californianus (MCL) was identified and characterized. The lectin was purified by affinity chromatography in α-lactose-agarose resin showing an experimental molecular mass of 18000 Da as determined by SDS-PAGE and MALDI-TOF mass spectrometry. It was specific for binding d-galactose and N-Acetyl-d-galactosamine that contained carbohydrate moieties that were also inhibited by melibiose and raffinose. It had the ability to agglutinate all types of human erythrocytes, as well as rabbit red blood cells. Circular dichroism analyzes have indicated that this lectin possessed an α/β fold with a predominance of β structures. This was consistent with the structure of the protein that was determined by the X-ray diffraction techniques. MCL was crystallized in the space group C21 and it diffracted to 1.79 Å resolution. Two monomers were found in the asymmetric unit and they formed dimers in solution. The protein has shown to be a member of the β-trefoil family, with three sugar binding sites per monomer. In accord with fluorescence-based thermal shift assays, we observed that the MCL Tm increased about 10 °C in the presence of galactose. Furthermore, we have determined the complete amino acid sequence by cDNA sequencing. The gene had two ORF2 proteins, one resulting in a 180 residue protein with a theoretical molecular mass of 20227 Da, and another resulting in a 150 residue protein with a theoretical molecular mass of 16911 Da. The difference between the theoretical and experimental values was due to the presence of a glycosylation that was observed by the glycosylation assay. A positive microbial agglutination and a growth inhibition activity were observed against Gram-negative and Gram-positive bacteria. The M. californianus lectin is the fourth member of the recently proposed new family of lectins that have been reported to date, occurring only in mollusks belonging to the family Mytilidae. It is the first member to be glycosylated and with a strong tendency to form large oligomers.
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Affiliation(s)
- Efrén García-Maldonado
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México. Circuito Exterior, Ciudad Universitaria, Coyoacán, Cd. Mx. C.P. 04510, Mexico
| | - Patricia Cano-Sánchez
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México. Circuito Exterior, Ciudad Universitaria, Coyoacán, Cd. Mx. C.P. 04510, Mexico
| | - Alejandra Hernández-Santoyo
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México. Circuito Exterior, Ciudad Universitaria, Coyoacán, Cd. Mx. C.P. 04510, Mexico.
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12
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Flores-Solis D, Toledano Y, Rodríguez-Lima O, Cano-Sánchez P, Ramírez-Cordero BE, Landa A, Rodríguez de la Vega RC, del Rio-Portilla F. Solution structure and antiparasitic activity of scorpine-like peptides fromHoffmannihadrurus gertschi. FEBS Lett 2016; 590:2286-96. [DOI: 10.1002/1873-3468.12255] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 06/06/2016] [Accepted: 06/07/2016] [Indexed: 11/06/2022]
Affiliation(s)
- David Flores-Solis
- Departamento de Química de Biomacromoléculas; Instituto de Química; Universidad Nacional Autónoma de México, CU; Ciudad de México México
| | - Yanis Toledano
- Departamento de Química de Biomacromoléculas; Instituto de Química; Universidad Nacional Autónoma de México, CU; Ciudad de México México
- Departamento de Química Inorgánica y Nuclear; Facultad de Química; Universidad Nacional Autónoma de México, CU; Ciudad de México México
| | - Oscar Rodríguez-Lima
- Departamento de Microbiología y Parasitología; Facultad de Medicina; Universidad Nacional Autónoma de México, CU; Ciudad de México México
| | - Patricia Cano-Sánchez
- Departamento de Química de Biomacromoléculas; Instituto de Química; Universidad Nacional Autónoma de México, CU; Ciudad de México México
| | - Belen Ernestina Ramírez-Cordero
- División de Neurociencias; Departamento de Neuropatología Molecular; Instituto de Fisiología Celular; Universidad Nacional Autónoma de México, CU; Ciudad de México México
| | - Abraham Landa
- Departamento de Microbiología y Parasitología; Facultad de Medicina; Universidad Nacional Autónoma de México, CU; Ciudad de México México
| | | | - Federico del Rio-Portilla
- Departamento de Química de Biomacromoléculas; Instituto de Química; Universidad Nacional Autónoma de México, CU; Ciudad de México México
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13
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Martínez-Caballero S, Cano-Sánchez P, Mares-Mejía I, Díaz-Sánchez AG, Macías-Rubalcava ML, Hermoso JA, Rodríguez-Romero A. Comparative study of two GH19 chitinase-like proteins fromHevea brasiliensis, one exhibiting a novel carbohydrate-binding domain. FEBS J 2014; 281:4535-54. [DOI: 10.1111/febs.12962] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/12/2014] [Accepted: 08/06/2014] [Indexed: 10/24/2022]
Affiliation(s)
| | - Patricia Cano-Sánchez
- Instituto de Química; Universidad Nacional Autónoma de México; Ciudad Universitaria México
| | - Israel Mares-Mejía
- Instituto de Química; Universidad Nacional Autónoma de México; Ciudad Universitaria México
| | - Angel G. Díaz-Sánchez
- Instituto de Química; Universidad Nacional Autónoma de México; Ciudad Universitaria México
| | | | - Juan A. Hermoso
- Departamento de Cristalografía y Biología Estructural; Instituto de Química-Física ‘Rocasolano’; CSIC Madrid Spain
| | - Adela Rodríguez-Romero
- Instituto de Química; Universidad Nacional Autónoma de México; Ciudad Universitaria México
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14
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Ramírez-Cordero B, Toledano Y, Cano-Sánchez P, Hernández-López R, Flores-Solis D, Saucedo-Yáñez AL, Chávez-Uribe I, Brieba LG, del Río-Portilla F. Cytotoxicity of recombinant tamapin and related toxin-like peptides on model cell lines. Chem Res Toxicol 2014; 27:960-7. [PMID: 24821061 DOI: 10.1021/tx4004193] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The scorpion toxin tamapin displays the most potent and selective blockage against KCa2.2 channels known to date. In this work, we report the biosynthesis, three-dimensional structure, and cytotoxicity on cancer cell lines (Jurkat E6-1 and human mammary breast cancer MDA-MB-231) of recombinant tamapin and five related peptides bearing mutations on residues (R6A,R7A, R13A, R6A-R7A, and GS-tamapin) that were previously suggested to be important for tamapin's activity. The indicated cell lines were used as they constitutively express KCa2.2 channels. The studied toxin-like peptides displayed lethal responses on Jurkat T cells and breast cancer cells; their effect is dose- and time-dependent with IC50 values in the nanomolar range. The order of potency is r-tamapin>GS-tamapin>R6A>R13A>R6A-R7A>R7A for Jurkat T cells and r-tamapin>R7A for MDA-MB-231 breast cancer cells. Our structural determination by NMR demonstrated that r-tamapin preserves the folding of the αKTx5 subfamily and that neither single nor double alanine mutations affect the three-dimensional structure of the wild-type peptide. In contrast, our activity assays show that changes in cytotoxicity are related to the chemical nature of certain residues. Our results suggest that the toxic activity of r-tamapin on Jurkat and breast cancer cells could be mediated by the interaction of charged residues in tamapin with KCa2.2 channels via the apoptotic cell death pathway.
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Affiliation(s)
- Belén Ramírez-Cordero
- Instituto de Química, Universidad Nacional Autónoma de México , Ciudad Universitaria, Circuito Exterior s/n, México, D.F. 04510, México
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15
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Saucedo AL, Flores-Solis D, Rodríguez de la Vega RC, Ramírez-Cordero B, Hernández-López R, Cano-Sánchez P, Noriega Navarro R, García-Valdés J, Coronas-Valderrama F, de Roodt A, Brieba LG, Domingos Possani L, del Río-Portilla F. New tricks of an old pattern: structural versatility of scorpion toxins with common cysteine spacing. J Biol Chem 2012; 287:12321-30. [PMID: 22238341 DOI: 10.1074/jbc.m111.329607] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Scorpion venoms are a rich source of K(+) channel-blocking peptides. For the most part, they are structurally related small disulfide-rich proteins containing a conserved pattern of six cysteines that is assumed to dictate their common three-dimensional folding. In the conventional pattern, two disulfide bridges connect an α-helical segment to the C-terminal strand of a double- or triple-stranded β-sheet, conforming a cystine-stabilized α/β scaffold (CSα/β). Here we show that two K(+) channel-blocking peptides from Tityus scorpions conserve the cysteine spacing of common scorpion venom peptides but display an unconventional disulfide pattern, accompanied by a complete rearrangement of the secondary structure topology into a CS helix-loop-helix fold. Sequence and structural comparisons of the peptides adopting this novel fold suggest that it would be a new elaboration of the widespread CSα/β scaffold, thus revealing an unexpected structural versatility of these small disulfide-rich proteins. Acknowledgment of such versatility is important to understand how venom structural complexity emerged on a limited number of molecular scaffolds.
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Affiliation(s)
- Alma Leticia Saucedo
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, D.F., 04510, México
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