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Marín-Prida J, Rodríguez-Ulloa A, Besada V, Llopiz-Arzuaga A, Batista NV, Hernández-González I, Pavón-Fuentes N, Marciano Vieira ÉL, Falcón-Cama V, Acosta EF, Martínez-Donato G, Cervantes-Llanos M, Lingfeng D, González LJ, Fernández-Massó JR, Guillén-Nieto G, Pentón-Arias E, Amaral FA, Teixeira MM, Pentón-Rol G. The effects of Phycocyanobilin on experimental arthritis involve the reduction in nociception and synovial neutrophil infiltration, inhibition of cytokine production, and modulation of the neuronal proteome. Front Immunol 2023; 14:1227268. [PMID: 37936684 PMCID: PMC10627171 DOI: 10.3389/fimmu.2023.1227268] [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] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 10/02/2023] [Indexed: 11/09/2023] Open
Abstract
Introduction The antinociceptive and pharmacological activities of C-Phycocyanin (C-PC) and Phycocyanobilin (PCB) in the context of inflammatory arthritis remain unexplored so far. In the present study, we aimed to assess the protective actions of these compounds in an experimental mice model that replicates key aspects of human rheumatoid arthritis. Methods Antigen-induced arthritis (AIA) was established by intradermal injection of methylated bovine serum albumin in C57BL/6 mice, and one hour before the antigen challenge, either C-PC (2, 4, or 8 mg/kg) or PCB (0.1 or 1 mg/kg) were administered intraperitoneally. Proteome profiling was also conducted on glutamate-exposed SH-SY5Y neuronal cells to evaluate the PCB impact on this key signaling pathway associated with nociceptive neuronal sensitization. Results and discussion C-PC and PCB notably ameliorated hypernociception, synovial neutrophil infiltration, myeloperoxidase activity, and the periarticular cytokine concentration of IFN-γ, TNF-α, IL-17A, and IL-4 dose-dependently in AIA mice. In addition, 1 mg/kg PCB downregulated the gene expression for T-bet, RORγ, and IFN-γ in the popliteal lymph nodes, accompanied by a significant reduction in the pathological arthritic index of AIA mice. Noteworthy, neuronal proteome analysis revealed that PCB modulated biological processes such as pain, inflammation, and glutamatergic transmission, all of which are involved in arthritic pathology. Conclusions These findings demonstrate the remarkable efficacy of PCB in alleviating the nociception and inflammation in the AIA mice model and shed new light on mechanisms underlying the PCB modulation of the neuronal proteome. This research work opens a new avenue to explore the translational potential of PCB in developing a therapeutic strategy for inflammation and pain in rheumatoid arthritis.
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Affiliation(s)
- Javier Marín-Prida
- Center for Research and Biological Evaluations, Institute of Pharmacy and Food, University of Havana, Havana, Cuba
| | - Arielis Rodríguez-Ulloa
- Division of Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Vladimir Besada
- Division of Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
- China-Cuba Biotechnology Joint Innovation Center (CCBJIC), Yongzhou Zhong Gu Biotechnology Co. Ltd, Yongzhou, China
| | - Alexey Llopiz-Arzuaga
- Division of Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
- Department of Cellular Engineering and Biocatalysis , Institute of Biotechnology, National Autonomous University of Mexico (UNAM), Cuernavaca, Mexico
| | - Nathália Vieira Batista
- Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Nancy Pavón-Fuentes
- Immunochemical Department, International Center for Neurological Restoration (CIREN), Havana, Cuba
| | - Érica Leandro Marciano Vieira
- Translational Psychoneuroimmunology Group, School of Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Viviana Falcón-Cama
- Division of Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
- Departments of Physiological or Morphological Sciences, Latin American School of Medicine (ELAM), Havana, Cuba
| | - Emilio F. Acosta
- Department of Characterization, Center for Advanced Studies of Cuba, Havana, Cuba
| | - Gillian Martínez-Donato
- Division of Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Majel Cervantes-Llanos
- Division of Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Dai Lingfeng
- China-Cuba Biotechnology Joint Innovation Center (CCBJIC), Yongzhou Zhong Gu Biotechnology Co. Ltd, Yongzhou, China
| | - Luis J. González
- Division of Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | | | - Gerardo Guillén-Nieto
- Division of Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
- Departments of Physiological or Morphological Sciences, Latin American School of Medicine (ELAM), Havana, Cuba
| | - Eduardo Pentón-Arias
- Division of Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
- Departments of Physiological or Morphological Sciences, Latin American School of Medicine (ELAM), Havana, Cuba
| | - Flávio Almeida Amaral
- Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Mauro Martins Teixeira
- Laboratory of Immunopharmacology, Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Giselle Pentón-Rol
- Division of Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
- Departments of Physiological or Morphological Sciences, Latin American School of Medicine (ELAM), Havana, Cuba
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Rojas L, Cabrera-Muñoz A, Espinosa LA, Montané S, Alvarez-Lajonchere L, Mojarena JD, Moya G, Lorenzo J, González LJ, Betzel C, Alonso-Del-Rivero Antigua M. CogiTx1: A novel subtilisin A inhibitor isolated from the sea anemone Condylactis gigantea belonging to the defensin 4 protein family. Biochimie 2023; 213:41-53. [PMID: 37105301 DOI: 10.1016/j.biochi.2023.04.015] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/13/2023] [Accepted: 04/24/2023] [Indexed: 04/29/2023]
Abstract
Subtilisin-like enzymes are recognized as key players in many infectious agents. In this context, its inhibitors are very valuable molecular lead compounds for structure based drug discovery and design. Marine invertebrates offer a great source of bioactive molecules, including protease inhibitors. In this work, we describe a new subtilisin inhibitor, from the sea anemone Condylactis gigantea (CogiTx1). CogiTx1 was purified using a combination of cation exchange chromatography, size exclusion chromatography and RP-HPLC chromatography. CogiTx1 it is a protein with 46 amino acid residues, with 4970.44 Da and three disulfide bridges. Is also able to inhibit subtilisin-like enzymes and pancreatic elastase. According to the amino acid sequence, it belongs to the defensin 4 family of proteins. The sequencing showed that CogiTx1 has an amidated C-terminal end, which was confirmed by the presence of the typical -XGR signal for amidation in the protein sequence deduced from the cDNA. This modification was described at protein level for the first time in this family of proteins. CogiTx1 is the first subtilisin inhibitor from the defensin 4 family and accordingly it has a folding consisting primarily in beta-strands in agreement with the analysis by CD and 3D modelling. Therefore, future in-depth functional studies may allow a more detailed characterization and will shed light on structure-function properties.
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Affiliation(s)
- Laritza Rojas
- Center for Protein Studies, Faculty of Biology, University of Havana, Havana, PC: 10400, Cuba
| | - Aymara Cabrera-Muñoz
- Center for Protein Studies, Faculty of Biology, University of Havana, Havana, PC: 10400, Cuba
| | - Luis A Espinosa
- Center for Genetic Engineering and Biotechnology, Havana, PC:60 200, Cuba
| | - Sergi Montané
- Institute of Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Cerdanyola del Valles, Barcelona, PC:08193, Spain
| | - Luis Alvarez-Lajonchere
- Felipe Poey Natural History Museum, Faculty of Biology, University of Havana, Havana, PC: 10400, Cuba
| | - Jesús D Mojarena
- Center for Protein Studies, Faculty of Biology, University of Havana, Havana, PC: 10400, Cuba
| | - Galina Moya
- Center for Genetic Engineering and Biotechnology, Havana, PC:60 200, Cuba
| | - Julia Lorenzo
- Institute of Biotechnology and Biomedicine, Autonomous University of Barcelona, Bellaterra, Cerdanyola del Valles, Barcelona, PC:08193, Spain
| | - Luis J González
- Center for Genetic Engineering and Biotechnology, Havana, PC:60 200, Cuba
| | - Christian Betzel
- Institute of Biochemistry and Molecular Biology, Department of Chemistry, Universität Hamburg, Hamburg, PC: 20146, Germany
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Ramos Y, Almeida A, Carpio J, Rodríguez‐Ulloa A, Perera Y, González LJ, Wiśniewski JR, Besada V. Gel electrophoresis/electroelution sorting fractionator combined with filter aided sample preparation for deep proteomic analysis. J Sep Sci 2022; 45:1784-1796. [DOI: 10.1002/jssc.202100992] [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] [Received: 01/10/2022] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Yassel Ramos
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Alexis Almeida
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Jenis Carpio
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Arielis Rodríguez‐Ulloa
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Yasser Perera
- China‐Cuba Biotechnology Joint Innovation Center (CCBJIC) Yongzhou Zhong Gu Biotechnology Co., Ltd Hunan Province China
- Molecular Oncology Group Pharmacology Department, Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Luis J. González
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Jacek R. Wiśniewski
- Biochemical Proteomics Group Department of Proteomics and Signal Transduction Max‐Planck‐Institute of Biochemistry Martinsried Germany
| | - Vladimir Besada
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
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4
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Rosales M, Rodríguez-Ulloa A, Pérez GV, Besada V, Soto T, Ramos Y, González LJ, Zettl K, Wiśniewski JR, Yang K, Perera Y, Perea SE. CIGB-300-Regulated Proteome Reveals Common and Tailored Response Patterns of AML Cells to CK2 Inhibition. Front Mol Biosci 2022; 9:834814. [PMID: 35359604 PMCID: PMC8962202 DOI: 10.3389/fmolb.2022.834814] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 02/01/2022] [Indexed: 01/13/2023] Open
Abstract
Protein kinase CK2 is a highly pleiotropic and ubiquitously expressed Ser/Thr kinase with instrumental roles in normal and pathological states, including neoplastic phenotype in solid tumor and hematological malignancies. In line with previous reports, CK2 has been suggested as an attractive prognostic marker and molecular target in acute myeloid leukemia (AML), a blood malignant disorder that remains as an unmet medical need. Accordingly, this work investigates the complex landscape of molecular and cellular perturbations supporting the antileukemic effect exerted by CK2 inhibition in AML cells. To identify and functionally characterize the proteomic profile differentially modulated by the CK2 peptide-based inhibitor CIGB-300, we carried out LC-MS/MS and bioinformatic analysis in human cell lines representing two differentiation stages and major AML subtypes. Using this approach, 109 and 129 proteins were identified as significantly modulated in HL-60 and OCI-AML3 cells, respectively. In both proteomic profiles, proteins related to apoptotic cell death, cell cycle progression, and transcriptional/translational processes appeared represented, in agreement with previous results showing the impact of CIGB-300 in AML cell proliferation and viability. Of note, a group of proteins involved in intracellular redox homeostasis was specifically identified in HL-60 cell-regulated proteome, and flow cytometric analysis also confirmed a differential effect of CIGB-300 over reactive oxygen species (ROS) production in AML cells. Thus, oxidative stress might play a relevant role on CIGB-300-induced apoptosis in HL-60 but not in OCI-AML3 cells. Importantly, these findings provide first-hand insights concerning the CIGB-300 antileukemic effect and draw attention to the existence of both common and tailored response patterns triggered by CK2 inhibition in different AML backgrounds, a phenomenon of particular relevance with regard to the pharmacologic blockade of CK2 and personalized medicine.
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Affiliation(s)
- Mauro Rosales
- Department of Animal and Human Biology, Faculty of Biology, University of Havana (UH), Havana, Cuba
- Molecular Oncology Group, Department of Pharmaceuticals, Biomedical Research Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - Arielis Rodríguez-Ulloa
- Mass Spectrometry Laboratory, Proteomics Group, Department of System Biology, Biomedical Research Division, CIGB, Havana, Cuba
| | - George V. Pérez
- Molecular Oncology Group, Department of Pharmaceuticals, Biomedical Research Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - Vladimir Besada
- Mass Spectrometry Laboratory, Proteomics Group, Department of System Biology, Biomedical Research Division, CIGB, Havana, Cuba
| | - Thalia Soto
- Department of Animal and Human Biology, Faculty of Biology, University of Havana (UH), Havana, Cuba
- Molecular Oncology Group, Department of Pharmaceuticals, Biomedical Research Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - Yassel Ramos
- Mass Spectrometry Laboratory, Proteomics Group, Department of System Biology, Biomedical Research Division, CIGB, Havana, Cuba
| | - Luis J. González
- Mass Spectrometry Laboratory, Proteomics Group, Department of System Biology, Biomedical Research Division, CIGB, Havana, Cuba
| | - Katharina Zettl
- Biochemical Proteomics Group, Department of Proteomics and Signal Transduction, Max-Planck Institute of Biochemistry, Munich, Germany
| | - Jacek R. Wiśniewski
- Biochemical Proteomics Group, Department of Proteomics and Signal Transduction, Max-Planck Institute of Biochemistry, Munich, Germany
| | - Ke Yang
- China-Cuba Biotechnology Joint Innovation Center (CCBJIC), Yongzhou Zhong Gu Biotechnology Co., Ltd., Yongzhou, China
- *Correspondence: Ke Yang, ; Yasser Perera, ; Silvio E. Perea,
| | - Yasser Perera
- Molecular Oncology Group, Department of Pharmaceuticals, Biomedical Research Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
- China-Cuba Biotechnology Joint Innovation Center (CCBJIC), Yongzhou Zhong Gu Biotechnology Co., Ltd., Yongzhou, China
- *Correspondence: Ke Yang, ; Yasser Perera, ; Silvio E. Perea,
| | - Silvio E. Perea
- Molecular Oncology Group, Department of Pharmaceuticals, Biomedical Research Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
- *Correspondence: Ke Yang, ; Yasser Perera, ; Silvio E. Perea,
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Rosales M, Rodríguez-Ulloa A, Besada V, Ramón AC, Pérez GV, Ramos Y, Guirola O, González LJ, Zettl K, Wiśniewski JR, Perera Y, Perea SE. Phosphoproteomic Landscape of AML Cells Treated with the ATP-Competitive CK2 Inhibitor CX-4945. Cells 2021; 10:cells10020338. [PMID: 33562780 PMCID: PMC7915770 DOI: 10.3390/cells10020338] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 01/30/2021] [Accepted: 02/02/2021] [Indexed: 12/13/2022] Open
Abstract
Casein kinase 2 (CK2) regulates a plethora of proteins with pivotal roles in solid and hematological neoplasia. Particularly, in acute myeloid leukemia (AML) CK2 has been pointed as an attractive therapeutic target and prognostic marker. Here, we explored the impact of CK2 inhibition over the phosphoproteome of two cell lines representing major AML subtypes. Quantitative phosphoproteomic analysis was conducted to evaluate changes in phosphorylation levels after incubation with the ATP-competitive CK2 inhibitor CX-4945. Functional enrichment, network analysis, and database mining were performed to identify biological processes, signaling pathways, and CK2 substrates that are responsive to CX-4945. A total of 273 and 1310 phosphopeptides were found differentially modulated in HL-60 and OCI-AML3 cells, respectively. Despite regulated phosphopeptides belong to proteins involved in multiple biological processes and signaling pathways, most of these perturbations can be explain by direct CK2 inhibition rather than off-target effects. Furthermore, CK2 substrates regulated by CX-4945 are mainly related to mRNA processing, translation, DNA repair, and cell cycle. Overall, we evidenced that CK2 inhibitor CX-4945 impinge on mediators of signaling pathways and biological processes essential for primary AML cells survival and chemosensitivity, reinforcing the rationale behind the pharmacologic blockade of protein kinase CK2 for AML targeted therapy.
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Affiliation(s)
- Mauro Rosales
- Department of Animal and Human Biology, Faculty of Biology, University of Havana (UH), Havana 10400, Cuba;
- Molecular Oncology Group, Department of Pharmaceuticals, Biomedical Research Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana 10600, Cuba; (A.C.R.); (G.V.P.)
| | - Arielis Rodríguez-Ulloa
- Mass Spectrometry Laboratory, Proteomics Group, Department of Systems Biology, Biomedical Research Division, CIGB, Havana 10600, Cuba; (A.R.-U.); (V.B.); (Y.R.); (L.J.G.)
| | - Vladimir Besada
- Mass Spectrometry Laboratory, Proteomics Group, Department of Systems Biology, Biomedical Research Division, CIGB, Havana 10600, Cuba; (A.R.-U.); (V.B.); (Y.R.); (L.J.G.)
| | - Ailyn C. Ramón
- Molecular Oncology Group, Department of Pharmaceuticals, Biomedical Research Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana 10600, Cuba; (A.C.R.); (G.V.P.)
| | - George V. Pérez
- Molecular Oncology Group, Department of Pharmaceuticals, Biomedical Research Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana 10600, Cuba; (A.C.R.); (G.V.P.)
| | - Yassel Ramos
- Mass Spectrometry Laboratory, Proteomics Group, Department of Systems Biology, Biomedical Research Division, CIGB, Havana 10600, Cuba; (A.R.-U.); (V.B.); (Y.R.); (L.J.G.)
| | - Osmany Guirola
- Bioinformatics Group, Department of Systems Biology, Biomedical Research Division, CIGB, Havana 10600, Cuba;
| | - Luis J. González
- Mass Spectrometry Laboratory, Proteomics Group, Department of Systems Biology, Biomedical Research Division, CIGB, Havana 10600, Cuba; (A.R.-U.); (V.B.); (Y.R.); (L.J.G.)
| | - Katharina Zettl
- Biochemical Proteomics Group, Department of Proteomics and Signal Transduction, Max-Planck Institute of Biochemistry, 82152 Munich, Germany; (K.Z.); (J.R.W.)
| | - Jacek R. Wiśniewski
- Biochemical Proteomics Group, Department of Proteomics and Signal Transduction, Max-Planck Institute of Biochemistry, 82152 Munich, Germany; (K.Z.); (J.R.W.)
| | - Yasser Perera
- Molecular Oncology Group, Department of Pharmaceuticals, Biomedical Research Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana 10600, Cuba; (A.C.R.); (G.V.P.)
- China-Cuba Biotechnology Joint Innovation Center (CCBJIC), Yongzhou Zhong Gu Biotechnology Co., Ltd, Lengshuitan District, Yongzhou 425000, China
- Correspondence: (Y.P.); (S.E.P.)
| | - Silvio E. Perea
- Molecular Oncology Group, Department of Pharmaceuticals, Biomedical Research Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana 10600, Cuba; (A.C.R.); (G.V.P.)
- Correspondence: (Y.P.); (S.E.P.)
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Besada V, Ramos Y, Espinosa LA, Fu W, Perera Y, González LJ. FAIMS-MS might contribute to phosphopeptides identification in plasma. J Proteomics 2021; 234:104102. [PMID: 33412312 DOI: 10.1016/j.jprot.2021.104102] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 01/03/2021] [Indexed: 01/24/2023]
Abstract
FAIMS interface is gaining popularity because of the impressive 100-fold signal to noise enhancement in addition to the recent coupling to the Orbitrap technology, the most important analyzer developed in the last 20 years. The selection of group of ions and effective removal of single-charged ones at particular compensation voltages increases around 50% the proteome coverage at expenses of lower peptides coverage. However, specific setting for phosphoproteome analysis is yet poorly described. Here we have found the maximum transmission for several tryptic phosphopeptides isolated from a single complex mixture and we have set an experimental method based on five compensation voltages partially different to the ones described previously, demonstrating the relevance of voltages higher than 47 V, with an increase of around 20% of unique phosphopeptides. Using this experimental setup two complex phosphoproteomes isolates (SH-SY5Y cell line and plasma) were analyzed and found increments of 50% on phosphopeptides identification with the proposed method with respect to a previous one, for the cell line extract. Meanwhile for plasma 109 of the detected phosphopeptides are found for first time in this body fluid, presumably due to the release of intracellular proteins. With this FAIMS setup, 60% of the proteins identified are classified as very low abundant proteins.
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Affiliation(s)
- V Besada
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology (CIGB), Havana CP: 10600, Cuba; Proteomics Laboratory, China-Cuba Biotechnology Joint Innovation Center (CCBJIC), Yongzhou Zhong Gu Biotechnology Co., Ltd, Yangjiaqiao Street, Lengshuitan District, Yongzhou City, Hunan Province CP: 425000, China.
| | - Y Ramos
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology (CIGB), Havana CP: 10600, Cuba.
| | - L A Espinosa
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology (CIGB), Havana CP: 10600, Cuba.
| | - W Fu
- Proteomics Laboratory, China-Cuba Biotechnology Joint Innovation Center (CCBJIC), Yongzhou Zhong Gu Biotechnology Co., Ltd, Yangjiaqiao Street, Lengshuitan District, Yongzhou City, Hunan Province CP: 425000, China.
| | - Y Perera
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology (CIGB), Havana CP: 10600, Cuba; Proteomics Laboratory, China-Cuba Biotechnology Joint Innovation Center (CCBJIC), Yongzhou Zhong Gu Biotechnology Co., Ltd, Yangjiaqiao Street, Lengshuitan District, Yongzhou City, Hunan Province CP: 425000, China.
| | - L J González
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology (CIGB), Havana CP: 10600, Cuba.
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Betancourt LH, Espinosa LA, Ramos Y, Bequet-Romero M, Rodríguez EN, Sánchez A, Marko-Varga G, González LJ, Besada V. Targeting the hydrophilic regions of recombinant proteins by MS via in-solution buffer-free trypsin digestion. Eur J Mass Spectrom (Chichester) 2020; 26:230-237. [PMID: 31822129 DOI: 10.1177/1469066719893492] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A desalting step using reversed phase chromatography is a common practice prior to mass spectrometry analysis of proteolytic digests in spite of the detrimental exclusion of the hydrophilic peptides. The detection of such peptides is also important for the complete coverage of protein sequences and the analysis of posttranslational modifications as inquired by regulatory agencies for the commercialization of biotechnological products. The procedure described here, named in-solution buffer-free digestion, simplifies the sample processing and circumvents the above-mentioned limitations by allowing the detection of tryptic hydrophilic peptides via direct ESI-MS analysis. Two DNA recombinant proteins such as HBcAg (hepatitis B core antigen) and fusion VEGF (vascular endothelial growth factor) were analyzed with the proposed in-solution buffer-free digestion allowing the detection of extremely hydrophilic di-, tri- and tetra-peptides, C-terminal His-tail peptide, as well as disulfide-containing peptides. All these molecular species are hardly seen in mass spectrometric analysis using a standard digestion that includes a C18-desalting step. The procedure was also successfully tried on hydrophilic tetra- and hexa-peptides of Ribonuclease B carrying an N-glycosylation site occupied with "high-mannose" N-glycan chains. The in-solution buffer-free digestion constitutes a simple and straightforward approach to analyse the hydrophilic proteolytic peptides which are commonly elusive to the detection by conventional mass spectrometric analysis.
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Affiliation(s)
- Lázaro H Betancourt
- Divison of Clinical Protein Science & Imaging, Department of Clinical Sciences (Lund) and Department of Biomedical Engineering, Lund University, Lund, Sweden
| | - Luis A Espinosa
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Yassel Ramos
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Mónica Bequet-Romero
- Pharmaceutics, Biomedical Research, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Elías N Rodríguez
- Division for Technological Development, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Aniel Sánchez
- Divison of Clinical Protein Science & Imaging, Department of Clinical Sciences (Lund) and Department of Biomedical Engineering, Lund University, Lund, Sweden
| | - Gyorgy Marko-Varga
- Divison of Clinical Protein Science & Imaging, Department of Clinical Sciences (Lund) and Department of Biomedical Engineering, Lund University, Lund, Sweden
| | - Luis J González
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
| | - Vladimir Besada
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
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Ramos Y, González A, Sosa‐Acosta P, Perez‐Riverol Y, García Y, Castellanos‐Serra L, Gil J, Sánchez A, González LJ, Besada V. Sodium dodecyl sulfate free gel electrophoresis/electroelution sorting for peptide fractionation. J Sep Sci 2019; 42:3712-3717. [DOI: 10.1002/jssc.201900495] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 10/08/2019] [Accepted: 10/10/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Yassel Ramos
- Department of ProteomicsCenter for Genetic Engineering and Biotechnology La Habana Cuba
| | - Annia González
- Department of ProteomicsCenter for Genetic Engineering and Biotechnology La Habana Cuba
| | - Patricia Sosa‐Acosta
- Department of ProteomicsCenter for Genetic Engineering and Biotechnology La Habana Cuba
| | - Yasset Perez‐Riverol
- European Molecular Biology LaboratoryEuropean Bioinformatics Institute (EMBL‐EBI)Wellcome Trust Genome Campus Hinxton Cambridge United Kingdom
| | - Yairet García
- Department of ProteomicsCenter for Genetic Engineering and Biotechnology La Habana Cuba
| | | | - Jeovanis Gil
- Clinical Protein Science & Imaging, Biomedical CentreDepartment of Biomedical EngineeringLund University, Lund Lund Sweden
| | - Aniel Sánchez
- Section for Clinical ChemistryDepartment of Translational MedicineLund UniversitySkåne University Hospital Malmö Malmö Sweden
| | - Luis J. González
- Department of ProteomicsCenter for Genetic Engineering and Biotechnology La Habana Cuba
| | - Vladimir Besada
- Department of ProteomicsCenter for Genetic Engineering and Biotechnology La Habana Cuba
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Fernández‐Mayola M, Betancourt L, Molina‐Kautzman A, Palomares S, Mendoza‐Marí Y, Ugarte‐Moreno D, Aguilera‐Barreto A, Bermúdez‐Álvarez Y, Besada V, González LJ, García‐Ojalvo A, Mir‐Benítez AJ, Urquiza‐Rodríguez A, Berlanga‐Acosta J. Growth hormone-releasing peptide 6 prevents cutaneous hypertrophic scarring: early mechanistic data from a proteome study. Int Wound J 2018; 15:538-546. [PMID: 29464859 PMCID: PMC7949743 DOI: 10.1111/iwj.12895] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 01/05/2018] [Indexed: 12/13/2022] Open
Abstract
Hypertrophic scars (HTS) and keloids are forms of aberrant cutaneous healing with excessive extracellular matrix (ECM) deposition. Current therapies still fall short and cause undesired effects. We aimed to thoroughly evaluate the ability of growth hormone releasing peptide 6 (GHRP6) to both prevent and reverse cutaneous fibrosis and to acquire the earliest proteome data supporting GHRP6's acute impact on aesthetic wound healing. Two independent sets of experiments addressing prevention and reversion effects were conducted on the classic HTS model in rabbits. In the prevention approach, the wounds were assigned to topically receive GHRP6, triamcinolone acetonide (TA), or vehicle (1% sodium carboxy methylcellulose [CMC]) from day 1 to day 30 post-wounding. The reversion scheme was based on the infiltration of either GHRP6 or sterile saline in mature HTS for 4 consecutive weeks. The incidence and appearance of HTS were systematically monitored. The sub-epidermal fibrotic core area of HTS was ultrasonographically determined, and the scar elevation index was calculated on haematoxylin/eosin-stained, microscopic digitised images. Tissue samples were collected for proteomics after 1 hour of HTS induction and treatment with either GHRP6 or vehicle. GHRP6 prevented the onset of HTS without the untoward reactions induced by the first-line treatment triamcinolone acetonide (TA); however, it failed to significantly reverse mature HTS. The preliminary proteomic study suggests that the anti-fibrotic preventing effect exerted by GHRP6 depends on different pathways involved in lipid metabolism, cytoskeleton arrangements, epidermal cells' differentiation, and ECM dynamics. These results enlighten the potential success of GHRP6 as one of the incoming alternatives for HTS prevention.
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Affiliation(s)
- Maday Fernández‐Mayola
- Wound Healing and Cytoprotection Group, Biomedical Research DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
| | - Lázaro Betancourt
- Mass Spectrometry and Bioinformatics Group, Department of Proteomics. Biomedical Research DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
| | - Alicia Molina‐Kautzman
- Wound Healing and Cytoprotection Group, Biomedical Research DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
| | - Sucel Palomares
- Mass Spectrometry and Bioinformatics Group, Department of Proteomics. Biomedical Research DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
| | - Yssel Mendoza‐Marí
- Wound Healing and Cytoprotection Group, Biomedical Research DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
| | | | - Ana Aguilera‐Barreto
- Pharmaceutical Formulations Department, Technological Development DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
| | - Yilian Bermúdez‐Álvarez
- Pharmaceutical Formulations Department, Technological Development DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
| | - Vladimir Besada
- Mass Spectrometry and Bioinformatics Group, Department of Proteomics. Biomedical Research DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
| | - Luis J. González
- Mass Spectrometry and Bioinformatics Group, Department of Proteomics. Biomedical Research DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
| | - Ariana García‐Ojalvo
- Wound Healing and Cytoprotection Group, Biomedical Research DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
| | - Ana J. Mir‐Benítez
- Plastic and Reconstructive Surgery Department“Joaquín Albarrán” HospitalHavanaCuba
| | | | - Jorge Berlanga‐Acosta
- Wound Healing and Cytoprotection Group, Biomedical Research DirectionCenter for Genetic Engineering and BiotechnologyHavanaCuba
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10
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Huerta V, Ramos Y, Yero A, Pupo D, Martín D, Toledo P, Fleitas N, Gallien S, Martín AM, Márquez GJ, Pérez-Riverol Y, Sarría M, Guirola O, González LJ, Domon B, Chinea G. Novel interactions of domain III from the envelope glycoprotein of dengue 2 virus with human plasma proteins. J Proteomics 2015; 131:205-213. [PMID: 26546555 DOI: 10.1016/j.jprot.2015.11.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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: 05/15/2015] [Revised: 10/16/2015] [Accepted: 11/02/2015] [Indexed: 11/24/2022]
Abstract
UNLABELLED Blood cells and plasma are important media for the four serotypes of dengue virus (DENV1-4) spreading into an infected person. Thus, interactions with human plasma proteins are expected to be decisive in the course of the viral infection. Affinity purification followed by MS analysis (AP/MS) was used to isolate and identify plasma-derived proteins capable to interact with a recombinant protein comprising the domain III of the envelope protein of DENV2 (DIIIE2). The elution of the AP potently inhibits DENV2 infection. Twenty-nine proteins were identified using a label-free approach as specifically captured by DIIIE2. Of these, a direct interaction with C reactive protein, thrombin and Inter-alpha-inhibitor complexes was confirmed by ELISA. Results provide further evidence of a significant representation of proteins from complement and coagulation cascades on DENV2 interactome in human plasma and stand out the domain III of the viral envelope protein as participant on these interactions. A functional clustering analysis highlights the presence of three structural motifs among putative DIIIE2-binding proteins: hydroxylation and EGF-like calcium-binding- and Gla domains. BIOLOGICAL SIGNIFICANCE Early cycles of dengue virus replication take place in human blood cells. Thus, the characterization of the interactome of dengue virus proteins in human plasma can lead to the identification of pivotal interactions for the infection that can eventually constitute the target for the development of methods to control dengue virus-caused disease. In this work we identified 29 proteins from human plasma that potentially interact with the envelope protein of dengue 2 virus either directly or through co-complex formation. C reactive protein, thrombin and Inter-alpha-inhibitor complexes were validated as interactors of the domain III of the envelope protein of dengue 2. Results highlight the presence of three structural motifs among putative DIIIE2-binding proteins: hydroxylation and EGF-like calcium-binding- and Gla domains. This finding together with the participation of domain III of the envelope protein on the interactions with human plasma proteins should contribute to a better understanding of dengue virus interactome in human plasma. Such knowledge can contribute to the development of more effective treatments to infected persons.
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Affiliation(s)
- Vivian Huerta
- Center for Genetic Engineering and Biotechnology, Cuba.
| | - Yassel Ramos
- Center for Genetic Engineering and Biotechnology, Cuba
| | - Alexis Yero
- Center for Genetic Engineering and Biotechnology, Cuba
| | - Dianne Pupo
- Center for Genetic Engineering and Biotechnology, Cuba
| | - Dayron Martín
- Center for Genetic Engineering and Biotechnology, Cuba
| | | | | | | | | | | | | | - Mónica Sarría
- Center for Genetic Engineering and Biotechnology, Cuba
| | | | | | - Bruno Domon
- Luxembourg Clinical Proteomics Center, Luxembourg
| | - Glay Chinea
- Center for Genetic Engineering and Biotechnology, Cuba
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11
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Perez-Riverol Y, Sánchez A, Noda J, Borges D, Carvalho PC, Wang R, Vizcaíno JA, Betancourt L, Ramos Y, Duarte G, Nogueira FCS, González LJ, Padrón G, Tabb DL, Hermjakob H, Domont GB, Besada V. HI-bone: a scoring system for identifying phenylisothiocyanate-derivatized peptides based on precursor mass and high intensity fragment ions. Anal Chem 2013; 85:3515-20. [PMID: 23448308 DOI: 10.1021/ac303239g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Peptide sequence matching algorithms used for peptide identification by tandem mass spectrometry (MS/MS) enumerate theoretical peptides from the database, predict their fragment ions, and match them to the experimental MS/MS spectra. Here, we present an approach for scoring MS/MS identifications based on the high mass accuracy matching of precursor ions, the identification of a high intensity b1 fragment ion, and partial sequence tags from phenylthiocarbamoyl-derivatized peptides. This derivatization process boosts the b1 fragment ion signal, which turns it into a powerful feature for peptide identification. We demonstrate the effectiveness of our scoring system by implementing it on a computational tool called "HI-bone" and by identifying mass spectra of an Escherichia coli sample acquired on an Orbitrap Velos instrument using Higher-energy C-trap dissociation. Following this strategy, we identified 1614 peptide spectrum matches with a peptide false discovery rate (FDR) below 1%. These results were significantly higher than those from Mascot and SEQUEST using a similar FDR.
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Affiliation(s)
- Yasset Perez-Riverol
- Department of Proteomics, Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Ciudad de la Habana, Cuba
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12
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Perez-Riverol Y, Audain E, Millan A, Ramos Y, Sanchez A, Vizcaíno JA, Wang R, Müller M, Machado YJ, Betancourt LH, González LJ, Padrón G, Besada V. Isoelectric point optimization using peptide descriptors and support vector machines. J Proteomics 2012; 75:2269-74. [PMID: 22326964 DOI: 10.1016/j.jprot.2012.01.029] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 01/23/2012] [Accepted: 01/25/2012] [Indexed: 11/24/2022]
Abstract
IPG (Immobilized pH Gradient) based separations are frequently used as the first step in shotgun proteomics methods; it yields an increase in both the dynamic range and resolution of peptide separation prior to the LC-MS analysis. Experimental isoelectric point (pI) values can improve peptide identifications in conjunction with MS/MS information. Thus, accurate estimation of the pI value based on the amino acid sequence becomes critical to perform these kinds of experiments. Nowadays, pI is commonly predicted using the charge-state model [1], and/or the cofactor algorithm [2]. However, none of these methods is capable of calculating the pI value for basic peptides accurately. In this manuscript, we present an new approach that can significant improve the pI estimation, by using Support Vector Machines (SVM) [3], an experimental amino acid descriptor taken from the AAIndex database [4] and the isoelectric point predicted by the charge-state model. Our results have shown a strong correlation (R(2)=0.98) between the predicted and observed values, with a standard deviation of 0.32 pH units across the complete pH range.
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Affiliation(s)
- Yasset Perez-Riverol
- Department of Proteomics, Center for Genetic Engineering and Biotechnology, Ave 31 e/ 158 y 190, Cubanacán, Playa, Ciudad de la Habana, Cuba
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13
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Betancourt LH, Sánchez A, Pérez Y, Fernandez de Cossio J, Gil J, Toledo P, Iguchi S, Aimoto S, González LJ, Padrón G, Takao T, Besada V. Charge state-selective separation of peptides by reversible modification of amino groups and strong cation-exchange chromatography: Evaluation in proteomic studies using peptide-centric database searches. J Proteomics 2011; 74:2210-3. [DOI: 10.1016/j.jprot.2011.04.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Revised: 04/26/2011] [Accepted: 04/29/2011] [Indexed: 10/18/2022]
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14
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Perez-Riverol Y, Sánchez A, Ramos Y, Schmidt A, Müller M, Betancourt L, González LJ, Vera R, Padron G, Besada V. In silico analysis of accurate proteomics, complemented by selective isolation of peptides. J Proteomics 2011; 74:2071-82. [PMID: 21658481 DOI: 10.1016/j.jprot.2011.05.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 05/06/2011] [Accepted: 05/22/2011] [Indexed: 01/28/2023]
Abstract
Protein identification by mass spectrometry is mainly based on MS/MS spectra and the accuracy of molecular mass determination. However, the high complexity and dynamic ranges for any species of proteomic samples, surpass the separation capacity and detection power of the most advanced multidimensional liquid chromatographs and mass spectrometers. Only a tiny portion of signals is selected for MS/MS experiments and a still considerable number of them do not provide reliable peptide identification. In this article, an in silico analysis for a novel methodology of peptides and proteins identification is described. The approach is based on mass accuracy, isoelectric point (pI), retention time (t(R)) and N-terminal amino acid determination as protein identification criteria regardless of high quality MS/MS spectra. When the methodology was combined with the selective isolation methods, the number of unique peptides and identified proteins increases. Finally, to demonstrate the feasibility of the methodology, an OFFGEL-LC-MS/MS experiment was also implemented. We compared the more reliable peptide identified with MS/MS information, and peptide identified with three experimental features (pI, t(R), molecular mass). Also, two theoretical assumptions from MS/MS identification (selective isolation of peptides and N-terminal amino acid) were analyzed. Our results show that using the information provided by these features and selective isolation methods we could found the 93% of the high confidence protein identified by MS/MS with false-positive rate lower than 5%.
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Affiliation(s)
- Yasset Perez-Riverol
- Department of Proteomics, Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Ciudad de la Habana, Cuba.
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15
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Ramos Y, Garcia Y, Pérez-Riverol Y, Leyva A, Padrón G, Sánchez A, Castellanos-Serra L, González LJ, Besada V. Peptide fractionation by acid pH SDS-free electrophoresis. Electrophoresis 2011; 32:1323-6. [DOI: 10.1002/elps.201000677] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 01/25/2011] [Accepted: 01/26/2011] [Indexed: 11/11/2022]
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16
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Rodríguez-Ulloa A, Ramos Y, Gil J, Perera Y, Castellanos-Serra L, García Y, Betancourt L, Besada V, González LJ, Fernández-de-Cossio J, Sanchez A, Serrano JM, Farina H, Alonso DF, Acevedo BE, Padrón G, Musacchio A, Perea SE. Proteomic profile regulated by the anticancer peptide CIGB-300 in non-small cell lung cancer (NSCLC) cells. J Proteome Res 2010; 9:5473-83. [PMID: 20804217 DOI: 10.1021/pr100728v] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
CIGB-300 is a proapoptotic peptide-based drug that abrogates the CK2-mediated phosphorylation. This peptide has antineoplastic effect on lung cancer cells in vitro and in vivo. To understand the mechanisms involved on such anticancer activity, the NCI-H125 cell line proteomic profile after short-term incubation (45 min) with CIGB-300 was investigated. As determined by 2-DE or 2D-LC-MS/MS, 137 proteins changed their abundances more than 2-fold in response to the CIGB-300 treatment. The expression levels of proteins related to ribosome biogenesis, metastasis, cell survival and proliferation, apoptosis, and drug resistance were significantly modulated by the presence of CIGB-300. The protein translation process was the most affected (23% of the identified proteins). From the proteome analysis of the NCI-H125 cell line, novel potentialities for CIGB-300 as anticancer agent were evidenced.
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Affiliation(s)
- Arielis Rodríguez-Ulloa
- Department of Bioinformatics, Center for Genetic Engineering and Biotechnology, Havana, Cuba.
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17
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Montesino R, Gil J, González LJ, Zamora Y, Royle L, Rudd PM, Dwek RA, Harvey DJ, Cremata JA. The N-glycosylation of classical swine fever virus E2 glycoprotein extracellular domain expressed in the milk of goat. Arch Biochem Biophys 2010; 500:169-80. [DOI: 10.1016/j.abb.2010.05.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Revised: 05/05/2010] [Accepted: 05/05/2010] [Indexed: 10/19/2022]
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18
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Cruz LJ, Cabrales A, Iglesias E, Aguilar JC, González LJ, Reyes O. Enhanced immunogenicity and cross-reactivity of HIV-1 V3-peptide and multiple antigen peptides conjugated to distinct carrier proteins. Int Immunopharmacol 2009; 9:1452-9. [DOI: 10.1016/j.intimp.2009.08.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2009] [Revised: 07/26/2009] [Accepted: 08/31/2009] [Indexed: 10/20/2022]
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19
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Gil J, Betancourt LZH, Sardiñas G, Yero D, Niebla O, Delgado M, García D, Pajón R, Sánchez A, González LJ, Padrón G, Campa C, Sotolongo F, Barberó R, Guillén G, Herrera L, Besada V. Proteomic study via a non-gel based approach of meningococcal outer membrane vesicle vaccine obtained from strain CU385: a road map for discovering new antigens. Hum Vaccin 2009; 5:347-56. [PMID: 19377283 DOI: 10.4161/hv.5.5.7367] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This work presents the results from a study of the protein composition of outer membrane vesicles from VA-MENGOC-BC (Finlay Institute, Cuba), an available vaccine against serogroup B Neisseria meningitidis. Proteins were identified by means of SCAPE, a 2DE-free method for proteome studies. More than one hundred proteins were detected by tandem liquid chromatographymass spectrometry analysis of fractions enriched in peptides devoid of histidine or arginine residues, providing a detailed description of the vaccine. A bioinformatic analysis of the identified components resulted in the identification of 31 outer membrane proteins and three conserved hypothetical proteins, allowing the cloning, expression, purification and immunological study of two of them (NMB0088 and NMB1796) as new antigens.
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Affiliation(s)
- Jeovanis Gil
- Center for Genetic Engineering and Biotechnology, Havana, Cuba
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20
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Ramos Y, Gutierrez E, Machado Y, Sánchez A, Castellanos-Serra L, González LJ, Fernández-de-Cossio J, Pérez-Riverol Y, Betancourt L, Gil J, Padrón G, Besada V. Proteomics based on peptide fractionation by SDS-free PAGE. J Proteome Res 2008; 7:2427-34. [PMID: 18422305 DOI: 10.1021/pr700840y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here we demonstrate the usefulness of peptide fractionation by SDS-free polyacrylamide gel electrophoresis and its applicability to proteomics studies. In the absence of SDS, the driving force for the electrophoretic migration toward the anode is supplied by negatively charged acidic amino acid residues and other residues as phosphate, sulfate and sialic acid, while the resulting mobility depends on both the charge and the molecular mass of the peptides. A straightforward method was achieved for SDS-PAGE of proteins, enzyme digestion, peptide transfer and fractionation by SDS-free PAGE, which was named dual-fractionation polyacrylamide gel electrophoresis (DF-PAGE). This method increases the number of identified proteins 2.5-fold with respect to the proteins identified after direct analysis, and more than 80% of assigned peptides were found in unique SDS-free gel slices. A vast majority of identified peptides (93%) have p I values below 7.0, and 7% have p I values between 7.0 and 7.35. Peptide digests that were derived from complex protein mixtures were in consequence simplified as peptides that are positively charged are not recovered in the present conditions. The analysis of a membrane protein extract from Neisseria meningitidis by this approach allowed the identification of 97 proteins, including low-abundance components.
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Affiliation(s)
- Yassel Ramos
- Center for Genetic Engineering and Biotechnology, La Habana, Cuba
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21
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Yamaguchi H, Sasaki K, Satomi Y, Shimbara T, Kageyama H, Mondal MS, Toshinai K, Date Y, González LJ, Shioda S, Takao T, Nakazato M, Minamino N. Peptidomic identification and biological validation of neuroendocrine regulatory peptide-1 and -2. J Biol Chem 2007; 282:26354-60. [PMID: 17609209 DOI: 10.1074/jbc.m701665200] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Recent advances in peptidomics have enabled the identification of previously uncharacterized peptides. However, sequence information alone does not allow us to identify candidates for bioactive peptides. To increase an opportunity to discover bioactive peptides, we have focused on C-terminal amidation, a post-translational modification shared by many bioactive peptides. We analyzed peptides secreted from human medullary thyroid carcinoma TT cells that produce amidated peptides, and we identified two novel amidated peptides, designated neuroendocrine regulatory peptide (NERP)-1 and NERP-2. NERPs are derived from distinct regions of the neurosecretory protein that was originally identified as a product of a nerve growth factor-responsive gene in PC12 cells. Mass spectrometric analysis of the immunoprecipitate using specific antibodies as well as reversed phase-high performance liquid chromatography coupled with radioimmunoassay analysis of brain extract demonstrated the endogenous presence of NERP-1 and NERP-2 in the rat. NERPs are abundant in the paraventricular and supraoptic nuclei of the rat hypothalamus and colocalized frequently with vasopressin but rarely with oxytocin. NERPs dose-dependently suppressed vasopressin release induced by intracerebroventricular injection of hypertonic NaCl or angiotensin II in vivo. NERPs also suppressed basal and angiotensin II-induced vasopressin secretion from hypothalamic explants in vitro. Bioactivity of NERPs required C-terminal amidation. Anti-NERP IgGs canceled plasma vasopressin reduction in response to water loading, indicating that NERPs could be potent endogenous suppressors of vasopressin release. These findings suggest that NERPs are novel modulators in body fluid homeostasis.
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Affiliation(s)
- Hideki Yamaguchi
- Division of Neurology, Respirology, Endocrinology, and Metabolism, Department of Internal Medicine, Miyazaki Medical College, University of Miyazaki, Kihara, Kiyotake, Miyazaki 889-1692, Japan
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22
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Abrahantes-Pérez MC, Reyes-González J, Véliz Ríos G, Bequet-Romero M, Gómez Riera R, Anais Gasmury C, Huerta V, González LJ, Canino C, Garcia J, Váldez J, Reyes B, Váldes R, Martínez E. Cytotoxic proteins combined with prodigiosin obtained from Serratia marcescens have both broad and selective cytotoxic activity on tumor cells. J Chemother 2006; 18:172-81. [PMID: 16736886 DOI: 10.1179/joc.2006.18.2.172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Cytotoxic proteins and prodigiosin obtained from Serratia marcescens strains are known to induce tumor cell death, nevertheless its combination has not been studied. In this paper we evaluate the combined effects of these molecules in a panel of tumor cell lines. The results showed a marked inhibitory effect on the growth of tumor cell lines derived from tumors (i.e., melanoma) which are highly resistant to conventional anticancer drugs, while normal cells were less sensitive than tumor cells. TUNEL (TdT-mediated dUTP nick end labeling) and electrophoresis of HEp-2 cell DNA treated with MG2327 preparation [containing the P50 protein belonging to the serralysins and prodigiosin, from S. marcescens CMIB4202] showed a pattern of DNA fragments typically associated with apoptosis. Interestingly, prodigiosin enhanced by 1.6-fold the cytotoxic effect of P50 when acting in combination on HEp-2 cells. The broad cytotoxic activity of the combination on tumor cells as well as its selectivity open new frontiers in cancer therapy.
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Affiliation(s)
- M C Abrahantes-Pérez
- Center for Genetic Engineering and Biotechnology, Havana 10600, P.O. Box 6162, Cuba.
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23
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Sánchez A, González LJ, Ramos Y, Betancourt L, Gil J, Besada V, Fernández-de-Cossio J, Alvarez F, Padrón G. Selective Isolation of Lysine-Free Tryptic Peptides Delimited by Arginine Residues: A New Tool for Proteome Analysis. J Proteome Res 2006; 5:1204-13. [PMID: 16674110 DOI: 10.1021/pr060003w] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tryptic digestion of biotinylated Lys-C peptides followed by affinity chromatography allows the selective isolation of lysine-free tryptic peptides delimited by arginine residues (RRnK peptides). In silico analysis revealed that RRnK peptides represent 87% of the whole proteomes and their specific isolation simplifies the complex peptide mixture (5 peptides per protein). The good recoveries and high selectivity obtained in the isolation of RRnK peptides anticipate the applicability of this method in 2DE-free quantitative proteome analyses.
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Affiliation(s)
- Aniel Sánchez
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana, Cuba
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24
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Betancourt L, Gil J, Besada V, González LJ, Fernández-de-Cossio J, García L, Pajón R, Sanchez A, Alvarez F, Padrón G. SCAPE: A New Tool for the Selective CApture of PEptides in Protein Identification. J Proteome Res 2005; 4:491-6. [PMID: 15822926 DOI: 10.1021/pr049794x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A method for the selective capture and analysis of peptides containing neither histidine nor arginine is evaluated. It is based on the reversible modification of alpha- and epsilon-amino groups of peptides and the relatively easy separation of charged and noncharged peptides by cation exchange chromatography. The simplicity of the method and the results obtained in silico and with standard proteins, anticipate the utility of the SCAPE approach for proteome analyses.
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Affiliation(s)
- Lazaro Betancourt
- Department for Proteome Analysis, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana, Cuba.
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González LJ, Cremata JA, Guanche Y, Ramos Y, Triguero A, Cabrera G, Montesino R, Huerta V, Pons T, Boué O, Farnós O, Rodríguez M. The cattle tick antigen, Bm95, expressed in Pichia pastoris contains short chains of N- and O-glycans. Arch Biochem Biophys 2005; 432:205-11. [PMID: 15542059 DOI: 10.1016/j.abb.2004.09.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2004] [Revised: 09/21/2004] [Indexed: 10/26/2022]
Abstract
Bm95 is an antigen isolated from Boophilus microplus strains with low susceptibility to antibodies developed in cattle vaccinated with the recombinant Bm86 antigen (Gavac, HeberBiotec S.A., Cuba). It is a Bm86-like surface protein, which by similarity contains seven EGF-like domains and a lipid-binding GPI-anchor site at the C-terminal region. The primary structure of the recombinant (rBm95) protein expressed in Pichia pastoris was completely verified by LC/MS. The four potential glycosylation sites (Asn 122, 163, 329, and 363) are glycosylated partially with short N-glycans, from Man(5)GlcNAc(2) to Man(9)GlcNAc(2) of which, Man(8-9)GlcNAc(2) were the most abundant. O-Glycopeptides are distributed mostly towards the protein N-terminus. While the first N-glycosylated site (Asn(122)) is located between EGF-like domains 2 and 3, where the O-glycopeptides were found, two other N-glycosylated sites (Asn(329) and Asn(363)) are located between EGF-like domains 5 and 6, a region devoid of O-glycosylated Ser or Thr.
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Affiliation(s)
- Luis J González
- Division of Physical-Chemistry, Department of Proteomics, Havana, Cuba
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26
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Cruz LJ, Iglesias E, Aguilar JC, González LJ, Reyes O, Albericio F, Andreu D. A comparative study of different presentation strategies for an HIV peptide immunogen. Bioconjug Chem 2004; 15:112-20. [PMID: 14733590 DOI: 10.1021/bc034119j] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Different strategies have been used to increase the immunogenicity of an antigenic HIV peptide as a vaccine candidate. The selected B-cell epitope comprises 15 amino acids (317-331) of the V3 region of HIV-1, JY1 isolate (subtype D), in tandem with a T-helper epitope corresponding to the 830-844 region of tetanus toxoid. Several presentations, including oligomerization, multiple antigenic peptide dendrimers, and conjugation to dextran beads or to other macromolecular carriers, have been synthesized and evaluated. Murine sera from the different presentations of the V3 epitope have been compared with regard to antibody titers and cross-reactivity with heterologous HIV subtypes. The dendrimer version of the peptide conjugated to HBsAg protein was a better immunogen than the dendrimer alone and showed a higher immunogenicity than other multimeric presentations or than the peptide alone conjugated to dextran. The dendrimer version, either alone or conjugated to HBSAg, enhanced cross-reactivity toward heterologous V3 sequences relative to monomeric peptide. In addition, fine epitope mapping of the entire JY1 sequence by sera from the different immunization groups was performed by the spot synthesis technique. Results showed that the amino acids involved in molecular recognition were LXQXXY or LXQXLY, with particularly strong recognition of the C-terminal region LGQALY. However, cross-reactivity toward the heterologous sequences did not completely correlate with recognition of particular amino acids in the primary sequences. These results can find application in the development of HIV vaccine candidates.
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Affiliation(s)
- Luis J Cruz
- Barcelona Institute of Biomedical Research, Barcelona Science Park, 08028 Barcelona, Spain
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27
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Boué O, Farnós O, González A, Fernández R, Acosta JA, Valdés R, González LJ, Guanche Y, Izquierdo G, Suárez M, Domínguez I, Machado H, Rodríguez M, Lleonart R. Production and biochemical characterization of the recombinant Boophilus microplus Bm95 antigen from Pichia pastoris. Exp Appl Acarol 2004; 32:119-128. [PMID: 15139278 DOI: 10.1023/b:appa.0000018199.87122.e4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The new antigen Bm95 from the cattle tick Boophilus microplus was recently isolated, cloned and expressed in the methylotrophic yeast Pichia pastoris. The recombinant protein has shown to induce protection in cattle against infestations of B. microplus under controlled and production conditions. In this paper we report the production and large-scale purification of the Bm95 protein, following a simple and cost-effective process. The antigen was obtained highly aggregated, forming particles ranging from 26 to 30 nm and with purity higher than 80%. The process yield was 0.55 g of pure Bm95 protein per liter of culture. The 98% of the primary structure of the recombinant protein was verified by mass spectrometry. Three amino acid changes in comparison with the sequence deduced from cDNA were detected by LC-MS/MS. The antigen was also obtained N-glycosylated, as previously reported for heterologous protein expression in P. pastoris.
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Affiliation(s)
- O Boué
- Division of Mammalian Cell Genetics, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, 10 600 Havana, Cuba.
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28
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Beldarraín A, Acosta N, Betancourt L, González LJ, Pons T. Enzymic, spectroscopic and calorimetric studies of a recombinant dextranase expressed in Pichia pastoris. Biotechnol Appl Biochem 2003; 38:211-21. [PMID: 12839491 DOI: 10.1042/ba20030063] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2003] [Revised: 06/18/2003] [Accepted: 07/02/2003] [Indexed: 11/17/2022]
Abstract
Conformational stability and structural characterization of an rDex (recombinant dextranase) expressed in Pichia pastoris were studied by enzymic assays, fluorescence, CD and DSC (differential scanning calorimetry). We also identified two disulphide bridges (Cys9-Cys14, Cys484-Cys488) and two free Cys residues (Cys336, Cys415) that are not conserved between bacterial and fungal dextranases of GH-49 (glycoside hydrolase family 49) by MALDI-TOF (matrix-assisted laser-desorption ionization-time-of-flight) MS. Enzymic and fluorescence studies revealed that rDex is biological and conformationally stable at acidic pH, with maximum activity at pH 4.5-5.0, while CD spectra indicated a secondary structure basically composed of beta-sheets. rDex loses biological activity at neutral pH without total disruption of its conformation. In addition, rDex preserves its conformation close to 60 degrees C, but it is thermally denatured with appreciable aggregation at temperatures above 75 degrees C. DSC studies always displayed irreversible transitions and a strong dependence on the scan rate. Our combined analysis suggested that the denaturation process of rDex is under kinetic control, which is described reasonably well by the two-state kinetic scheme.
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Affiliation(s)
- Alejandro Beldarraín
- Departamento de Evaluación de Procesos y Sistemas, Planta de Producción, Centro de Ingeniería Genética y Biotecnología, P.O. Box 6162, Habana 10600, Cuba.
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29
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Betancourt L, Besada V, González LJ, Morera V, Padrón G, Takao T, Shimonishi Y. Selective isolation and identification of N-terminal blocked peptides from tryptic protein digests. ACTA ACUST UNITED AC 2002; 57:345-53. [PMID: 11350594 DOI: 10.1034/j.1399-3011.2001.00825.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A method for the easy isolation and direct sequencing of N-terminally blocked peptide in proteins refractory to N-terminal sequencing was developed. It is based essentially on tandem enzymatic treatments of the protein with trypsin and carboxypeptidase B, and selective isolation of the Nalpha-blocked peptide using ion-exchange chromatography. The chromatographic step was optimized for picomole amounts of sample and very short elution times by placing a thin layer of the resin over the membrane of an ultrafiltration tube. The isolated fraction can be analyzed directly using MALDI or ESI mass spectrometry. The method was applied to several recombinant and natural N-terminal acetylated proteins. A critical discussion on the intrinsic limitations of the method is also given.
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Affiliation(s)
- L Betancourt
- Center for Genetic Engineering and Biotechnology, Havana, Cuba
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30
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Reyes O, Vallespi MG, Garay HE, Cruz LJ, González LJ, Chinea G, Buurman W, Araña MJ. Identification of single amino acid residues essential for the binding of lipopolysaccharide (LPS) to LPS binding protein (LBP) residues 86-99 by using an Ala-scanning library. J Pept Sci 2002; 8:144-50. [PMID: 11991204 DOI: 10.1002/psc.375] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Lipopolysaccharide binding protein (LBP) is a 60 kDa acute phase glycoprotein capable of binding to LPS of Gram-negative bacteria and facilitating its interaction with cellular receptors. This process is thought to be of great importance in systemic inflammatory reactions such as septic shock. A peptide corresponding to residues 86-99 of human LBP (LBP86-99) has been reported to bind specifically with high affinity the lipid A moiety of LPS and to inhibit the interaction of LPS with LBP. We identified essential amino acids in LBP86-99 for binding to LPS by using a peptide library corresponding to the Ala-scanning of human LBP residues 86-99. Amino acids Trp91 and Lys92 were indispensable for peptide-LPS interaction and inhibition of LBP-LPS binding. In addition, several alanine-substituted synthetic LBP-derived peptides inhibited LPS-LBP interaction. Substitution of amino acids Arg94, Lys95 and Phe98 by Ala increased the inhibitory effect. The mutant Lys95 was the most active in blocking LPS binding to LBP. These findings emphasize the importance of single amino acids in the LPS binding capacity of small peptides and may contribute to the development of new drugs for use in the treatment of Gram-negative bacterial sepsis.
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Affiliation(s)
- O Reyes
- Division of Physical Chemistry, Center for Genetic Engineering and Biotechnology, Havana, Cuba.
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31
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Dueñas-Carrera S, Viña A, Garay HE, Reyes O, Alvarez-Lajonchere L, Guerra I, González LJ, Morales J. Immunological evaluation of Escherichia coli-derived hepatitis C virus second envelope protein (E2) variants. J Pept Res 2001; 58:221-8. [PMID: 11576328 DOI: 10.1034/j.1399-3011.2001.00795.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Two variants of the hepatitis C virus (HCV) E2 envelope protein, lacking the C-terminal domain and comprising amino acids 458-650 (E2A) and 382-605 (E2C), respectively, were efficiently produced in BL21 (DE3) Escherichia coli cells. E2A and E2C were used to immunize mice. The E2C variant induced the maximal mean antibody titer. Anti-E2C mouse sera reacted mainly with E2 synthetic peptides covering the 70 amino acid N-terminal region of the E2 protein. Moreover, a panel of anti-HCV positive human sera recognized only the E2C protein (28.2%) and the synthetic peptide covering the HVR-1 of the E2 protein (23.1%). These data indicate the existence of an immunologically relevant region in the HVR-1 of the HCV E2 protein.
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Affiliation(s)
- S Dueñas-Carrera
- HCV Department, Vaccine Division, Centro de Ingeniería Genética y Biotecnología, Havana City, Cuba.
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32
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Huerta V, Morera V, Guanche Y, Chinea G, González LJ, Betancourt L, Martínez D, Alvarez C, Lanio ME, Besada V. Primary structure of two cytolysin isoforms from Stichodactyla helianthus differing in their hemolytic activity. Toxicon 2001; 39:1253-6. [PMID: 11306138 DOI: 10.1016/s0041-0101(00)00247-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Sticholysin I (St-I) and sticholysin II (St-II) are cytolysins purified from the sea anemone Stichodactyla helianthus with a high degree of sequence identity (93%) but clearly differenced in their hemolytic activity. In order to go further into the structural determinants for the different behavior of St-I and St-II, we report here the complete amino acid sequences and the consensus secondary structure prediction of both proteins. The complete determination of St-II primary structure confirms the partial revision of cytolysin III amino acid sequence. All nonconservative changes between St-I and St-II are located at the N-terminal. According to our prediction these changes could be located at the same face of an alpha-helix during pore formation events and could account for the observed differences in hemolytic activity between St-I and St-II.
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Affiliation(s)
- V Huerta
- Physical-Chemistry Division, Protein Structure Department, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana City, Cuba
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33
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Pérez R, Rodríguez H, Pérez E, Suárez M, Reyes O, González LJ, López de Cerain A, Ezpelata O, Pérez C, Ochoa C. Study on the decomposition products of thiadiazinthione and their anticancer properties. Arzneimittelforschung 2000; 50:854-7. [PMID: 11050705 DOI: 10.1055/s-0031-1300301] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Study of the anticancer properties of thirty-four 3,5-disubstituted-tetrahydro-2H-1,3,5-thiadiazin-2-thione derivatives has been carried out by using cytotoxicity assays against HeLa, HT-29 and Hep G2 cells. The decomposition products of thiadiazinthione 1 m have been studied and their anticancer properties evaluated.
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Affiliation(s)
- R Pérez
- Laboratorio de Síntesis Orgánica, Facultad de Qímica, Universidad de La Habana, Cuba
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34
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González LJ, Shimizu T, Satomi Y, Betancourt L, Besada V, Padrón G, Orlando R, Shirasawa T, Shimonishi Y, Takao T. Differentiating alpha- and beta-aspartic acids by electrospray ionization and low-energy tandem mass spectrometry. Rapid Commun Mass Spectrom 2000; 14:2092-2102. [PMID: 11114015 DOI: 10.1002/1097-0231(20001130)14:22<2092::aid-rcm137>3.0.co;2-v] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Spectra obtained by low-energy electrospray ionization tandem mass spectrometry (ESI-MS/MS) of 34 peptides containing aspartic acids at position n were studied and unambiguously differentiated. beta-Aspartic acid yields an internal rearrangement similar to that of the C-terminal rearrangements of protonated and cationized peptides. As a result of this rearrangement, two different ions containing the N- and the C-terminal ends of the original peptide are formed, namely, the bn-1 + H2O and y"l - n + 1 - 46 ions, respectively, where e is the number of amino acid residues in the peptide. The structure suggested for the y"l - n + 1 - 46 ion is identical to that proposed for the vn ions observed upon high-energy collision-induced dissociation (CID) experiments. The intensity of these ions in the low-energy MS/MS spectra is greatly influenced by the presence and position of basic amino acids within the sequences. Peptides with a basic amino acid residue at position n - 1 with respect to the beta-aspartic acid yield very intense bn-1 + H2O ions, while the y"l - n + 1 - 46 ion was observed mostly in tryptic peptides. Comparison between the high- and low-energy MS/MS spectra of several isopeptides suggests that a metastable fragmentation process is the main contributor to this rearrangement, whereas for long peptides (40 AA) CID plays a more important role. We also found that alpha-aspartic acid containing peptides yield the normal immonium ion at 88 Da, while peptides containing beta-aspartic acid yield an ion at m/z 70, and a mechanism to explain this phenomenon is proposed. Derivatizing isopeptides to form quaternary amines, and performing MS/MS on the sodium adducts of isopeptides, both improve the relative intensity of the bn + 1 + H2O ions. Based on the above findings, it was possible to determine the isomerization sites of two aged recombinant growth proteins.
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Affiliation(s)
- L J González
- Center for Genetic Engineering and Biotechnology, Havana, Cuba.
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35
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Guillén G, Alvarez A, Silva R, Morera V, González S, Musacchio A, Besada V, Coizeau E, Caballero E, Nazabal C, Carmenate T, González LJ, Estrada R, Támbara Y, Padrón G, Herrera L. Expression in Escherichia coli of the lpdA gene, protein sequence analysis and immunological characterization of the P64k protein from Neisseria meningitidis. Biotechnol Appl Biochem 1998; 27:189-96. [PMID: 9664678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
By making use of recombinant DNA technology it is possible to characterize meningococcal outer membrane proteins (OMPs) capable of stimulating a host immune response. The lpdA gene, which codes for an OMP (P64k) from Neisseria meningitidis, was cloned in Escherichia coli. The recombinant protein was recognized by sera from patients convalescing from meningococcal disease. The monoclonal antibodies obtained against the recombinant protein recognized the natural protein on a Western blot, and monoclonal antibody 114 was assayed in ELISA with a panel of 85 N. meningitidis strains. The protein was recognized in 81 strains (95.3%); the strains that were not recognized were neither epidemic nor isolated from systemic disease. The complete amino acid sequence of P64k was obtained by automatic sequencing and MS.
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Affiliation(s)
- G Guillén
- Division of Vaccines, Centro de Ingeniería Genética y Biotecnología, La Habana, Cuba
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