| Author | Silva-López, Raquel Elisa | |
| Author | Santos, Tatiana Resende dos | |
| Author | Morgado-Díaz, José Andrés | |
| Author | Tanaka, Marcelo Neves | |
| Author | De Simone, Salvatore Giovanni | |
| Access date | 2017-09-19T14:27:47Z | |
| Available date | 2017-09-19T14:27:47Z | |
| Document date | 2010 | |
| Citation | SILVA-LOPEZ, Raquel Elisa da; et al. Serine protease activities in Leishmania (Leishmania) chagasi promastigotes. Parasitol Res, v.107, p.1151–1162, 2010. | pt_BR |
| ISSN | 0932-0113 | pt_BR |
| URI | https://www.arca.fiocruz.br/handle/icict/21057 | |
| Language | eng | pt_BR |
| Publisher | Springer Verlag (Germany) | pt_BR |
| Rights | restricted access | |
| Subject in Portuguese | Serina proteases | pt_BR |
| Subject in Portuguese | Leishmania infantum | pt_BR |
| Title | Serine protease activities in Leishmania (Leishmania) chagasi promastigotes | pt_BR |
| Type | Article | |
| DOI | 10.1007/s00436-010-1983-y | |
| Abstract | The present work reports the isolation, biochemical characterization, and subcellular location of serine proteases from aqueous, detergent soluble, and culture supernatant of Leishmania chagasi promastigote extracts, respectively, LCSII, LCSI, and LCSIII. The active enzyme molecular masses of LCSII were about 105, 66, and 60 kDa; of LCSI, 60 and 58 kDa; and of LCSIII, approximately 76 and 68 kDa. Optimal pH for the enzymes was 7.0 for LCSI and LCSIII and 8.5 for LCSII, and the optimal temperature for all enzymes was 37°C, using α-N-ρ-tosyl-L: -arginine methyl ester as substrate. Assay of thermal stability indicated that LCSIII is the more stable enzyme. Hemoglobin, bovine serum albumin, and ovalbumin were hydrolyzed by LCSII and LCSI but not by LCSIII. Inhibition studies suggested that enzymes belong to the serine protease class modulated by divalent cations. Rabbit antiserum against 56-kDa serine protease of Leishmania amazonensis identified proteins in all extracts of L. chagasi. Furthermore, immunocytochemistry demonstrated that serine proteases are located in flagellar pocket region and cytoplasmic vesicles of L. chagasi promastigotes. These findings indicate that L. chagasi serine proteases differ from L. amazonensis proteases and all known flagellate proteases, but display some similarities with serine proteases from other Leishmania species, suggesting a conservation of this enzymatic activity in the genus. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Bioquímica de Proteínas e Peptídeos. Rio de Janeiro, RJ. Brasil / Fundação Oswaldo Cruz. Farmanguinhos. Departamento de Produtos Naturais. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Bioquímica de Proteínas e Peptídeos. Rio de Janeiro, RJ. Brasil. | pt_BR |
| Affilliation | Instituto Nacional de Câncer. Centro de Pesquisas. Grupo de Bilogia Estrutural. Rio de Janeiro, RJ, Brasil | pt_BR |
| Affilliation | Instituto Nacional de Câncer. Centro de Pesquisas. Grupo de Bilogia Estrutural. Rio de Janeiro, RJ, Brasil | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Bioquímica de Proteínas e Peptídeos. Rio de Janeiro, RJ. Brasil / Universidade Federal Fluminense. Instituto de Biologia. Departamento de Bioquímica e Biologia Molecular. Niterói, RJ, Brasil. | pt_BR |
| Subject | Serine protease | pt_BR |
| Subject | Leishmania (Leishmania) chagasi | pt_BR |
| e-ISSN | 1432-1955 | |
| Embargo date | 2030-01-01 | |
