Enzymatic labelling of venom phospholipase A2 toxins
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| Autores: | , , , , |
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| Formato: | artículo original |
| Fecha de Publicación: | 2019 |
| Descripción: | Almost all animal venoms contain secretory phospholipases A2 (PLA2s), 14 kDa disulfide-rich enzymes that hydrolyze membrane phospholipids at the sn-2 position, releasing lysophospholipids and fatty acids. These proteins, depending on their sequence, show a wide variety of biochemical, toxic and pharmacological effects and deserve to be studied for their numerous possible applications, and to improve antivenom drugs. The cellular localization and activity of a protein can be studied by conjugating it with a tag. In this work, we applied an enzymatic labelling method, using Streptomyces mobaraense transglutaminase, on three snake venom PLA2s: a recombinant neuro- and myotoxic group I PLA2 from Notechis scutatus scutatus, and two myotoxic group II PLA2s from Bothrops asper - one of them a natural catalytically inactive variant. We demonstrate that TGase can be used to produce active mono- or bi-derivatives of these three PLA2s modified at specific Lys residues, and that all three of these proteins, conjugated with fluorescent peptides, are internalized in primary myotubes. |
| País: | Kérwá |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| OAI Identifier: | oai:https://www.kerwa.ucr.ac.cr:10669/80385 |
| Acceso en línea: | https://www.sciencedirect.com/science/article/pii/S0041010119304696?via%3Dihub https://hdl.handle.net/10669/80385 |
| Access Level: | acceso abierto |
| Palabra clave: | Secretory phospholipase A2 Protein labelling Enzymatic conjugation Transglutaminase snake venom |