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Structural Basis for the Inhibition of a Phospholipase A2-Like Toxin by Caffeic and Aristolochic Acids
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Structural Basis for the Inhibition of a Phospholipase A2-Like Toxin by Caffeic and Aristolochic Acids
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Journal Article
Structural Basis for the Inhibition of a Phospholipase A2-Like Toxin by Caffeic and Aristolochic Acids
2015
Overview
One of the main challenges in toxicology today is to develop therapeutic alternatives for the treatment of snake venom injuries that are not efficiently neutralized by conventional serum therapy. Venom phospholipases A2 (PLA2s) and PLA2-like proteins play a fundamental role in skeletal muscle necrosis, which can result in permanent sequelae and disability. This leads to economic and social problems, especially in developing countries. In this work, we performed structural and functional studies with Piratoxin-I, a Lys49-PLA2 from Bothropspirajai venom, complexed with two compounds present in several plants used in folk medicine against snakebites. These ligands partially neutralized the myotoxic activity of PrTX-I towards binding on the two independent sites of interaction between Lys49-PLA2 and muscle membrane. Our results corroborate the previously proposed mechanism of action of PLA2s-like and provide insights for the design of structure-based inhibitors that could prevent the permanent injuries caused by these proteins in snakebite victims.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Animals
/ Aristolochic Acids - chemistry
/ Aristolochic Acids - pharmacology
/ Caffeic Acids - pharmacology
/ Crotalid Venoms - antagonists & inhibitors
/ Crotalid Venoms - metabolism
/ Group II Phospholipases A2 - antagonists & inhibitors
/ Group II Phospholipases A2 - chemistry
/ Group II Phospholipases A2 - metabolism
/ Injuries
/ LDCs
/ Ligands
/ Mice
/ Muscles
/ Proteins
/ Reptilian Proteins - antagonists & inhibitors
/ Reptilian Proteins - chemistry
/ Reptilian Proteins - metabolism
/ Snakes
/ Structure-function relationships
/ Studies
/ Toxins
/ Venom
