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Structural determinants of the hyperalgesic activity of myotoxic Lys49-phospholipase A2 J. Venom. Anim. Toxins incl. Trop. Dis.
Zambelli,Vanessa Olzon; Chioato,Lucimara; Gutierrez,Vanessa Pacciari; Ward,Richard John; Cury,Yara.
Abstract Background Bothropstoxin-I (BthTx-I) is a Lys49-phospholipase A2 (Lys49-PLA2) from the venom of Bothrops jararacussu, which despite of the lack of catalytic activity induces myotoxicity, inflammation and pain. The C-terminal region of the Lys49-PLA2s is important for these effects; however, the amino acid residues that determine hyperalgesia and edema are unknown. The aim of this study was to characterize the structural determinants for the Lys49-PLA2-induced nociception and inflammation. Methods Scanning alanine mutagenesis in the active-site and C-terminal regions of BthTx-I has been used to study the structural determinants of toxin activities. The R118A mutant was employed as this substitution decreases PLA2 myotoxicity. In addition, K115A...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lys49-Phospholipase A2; Hyperalgesia; Site-directed mutagenesis; Myotoxic effect; Edema; Membrane damage.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100304
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