| Full text | |
| Author(s): |
dos Santos, Roney Vander
[1]
;
Grillo, Giovanna
[1]
;
Fonseca, Henrique
[1]
;
Stanisic, Danijela
[1]
;
Tasic, Ljubica
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Estadual Campinas, Inst Chem, Organ Chem Dept, Biol Chem Lab, UNICAMP, Campinas, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Toxicon; v. 198, p. 64-72, JUL 30 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The majority (90%) of the snakebite envenomation in Brazil accounts for Bothrops from the Viperidae family. Some snake venom serine proteases provoke blood coagulation in ophidian accident victims because of their fibrinolytic activity, one of those proteases from Bothrops jararaca (B. jararaca) has been chosen for this study. Our objectives were to isolate and characterize the target serine protease; isolate, purify, and characterize the orange bagasse flavone (hesperetin, Hst), and investigate the interactions between the targets, enzyme, and hesperetin. The purified serine protease was named BjSP24 because of its molecular mass and proteolytic activity. BjSP24 was folded and characterized using circular dichroism and showed low alpha-helix contents (7.7%). BjSP24 exhibited sequence similarity to other known snake venom serine proteases as measured in the enzyme tryptic peptides' LC-MS/MS run. Hesperetin was obtained within the expected yield and with the predominance of 2S isomer (82%). It acted as a mixed inhibitor for the serine protease (SVSP) from Bothrops jararaca snake venom observed in three different in vitro experiments, fluorescence, kinetics, and SSTD-NMR. It is still to determine if hesperetin might aid-in reverting the on site blood clotting problems just after snakebite accidents. (AU) | |
| FAPESP's process: | 16/21682-0 - Biochemical studies of a serine protease from snake venom |
| Grantee: | Giovanna Rivabem Grillo |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |