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Vilca-Quispe A, Alvarez-Risco A, Gomes Heleno MA, Ponce-Fuentes EA, Vera-Gonzales C, Zegarra-Aragon HFE, Aquino-Puma JL, Talavera-Núñez ME, Del-Aguila-Arcentales S, Yáñez JA, Ponce-Soto LA. Biochemical and hemostatic description of a thrombin-like enzyme TLBro from Bothrops roedingeri snake venom. Front Chem 2023; 11:1217329. [PMID: 38099189 PMCID: PMC10720248 DOI: 10.3389/fchem.2023.1217329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 11/17/2023] [Indexed: 12/17/2023] Open
Abstract
Objective: The current study's objective is to characterize a new throm-bin-like enzyme called TLBro that was obtained from Bothrops roedingeris snake from a biochemical and hemostatic perspective. Methodology: One chromatographic step was used to purify it, producing the serine protease TLBro. Molecular mass was estimated by SDS-PAGE to be between reduced and unreduced by 35 kDa. Tryptic peptide sequencing using Swiss Prot provided the complete amino acid sequence. Expasy.org by conducting a search that is limited to Crotalinae snake serine proteases and displaying a high degree of amino acid sequence. Results: Ser (182) is inhibited by phenylmethylsulfonyl fluoride (PMSF), and TLBro demonstrated the presence of Asp (88) residues. It also deduced the positions of His (43) and Ser (182) in the set of three coordinated amino acids in serine proteases. It was discovered that this substrate had high specificity for BANA, Michaelis-Menten behavior with KM 0 point85 mM and Vmax 1 point89 nmoles -NA/L/min, and high stability between temperatures (15 to 70°C) and pHs (2 point0 to 10 point0). According to doses and incubation times, TLBro degraded fibrin preferentially on the B-chain; additionally, its activities were significantly diminished after preincubation with divalent ions (Zn2 and Cd2). When incubated with PMSF, a particular serine protease inhibitor, enzymatic activities and platelet aggregation were inhibited. Conclusion: The findings revealed distinct structural and functional differences between the serine proteases, adding to the information and assisting in the improvement of the structure-function relationship.
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Affiliation(s)
- Augusto Vilca-Quispe
- Department of Biochemistry, Institute of Biology (IB), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Aldo Alvarez-Risco
- Facultad de Administración y Negocios, Universidad Tecnológica del Perú, Lima, Perú
| | - Mauricio Aurelio Gomes Heleno
- Centro de Estudos de Venenos e Animais Peçonhentos (CEVAP), Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Botucatu, SP, Brazil
| | | | - Corina Vera-Gonzales
- Departamento Académico de Química, Facultad de Ciencias Naturales y Formales, Universidad Nacional de San Agustín de Arequipa, Arequipa, Perú
| | | | - Juan Luis Aquino-Puma
- Facultad de Medicina, Universidad Nacional de San Agustín de Arequipa, Arequipa, Perú
| | - María Elena Talavera-Núñez
- Departamento Académico de Química, Facultad de Ciencias Naturales y Formales, Universidad Nacional de San Agustín de Arequipa, Arequipa, Perú
| | | | - Jaime A. Yáñez
- Facultad de Educación, Carrera de Educación y Gestión del Aprendizaje, Universidad Peruana de Ciencias Aplicadas, Lima, Perú
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