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Crystallization and preliminary X-ray diffraction analysis of myotoxin I, a Lys49-phospholipase A2 from Bothrops
D P Marchi-Salvador1, L B Silveira, A M Soares
1Departamento de Física e Biofísica-IB, UNESP, CP 510, CEP 18618-000, Botucatu-SP, Brazil.
Abstract:
A new myotoxic Lys49-phospholipase A2 isolated from Bothrops moojeni snake venom has been crystallized. The crystals diffracted to 2.18 A resolution using a synchrotron-radiation source and belong to space group C2. The unit-cell parameters are a = 56.8, b = 125.0, c = 64.7 A, beta = 105.5 degrees. Preliminary analysis indicates the presence of four molecules in the asymmetric unit. This may suggest a new quaternary structure for this Lys49-phospholipase A2 in contrast to the dimeric and monomeric structures solved so far for this class of proteins.
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