Artículos de revistas
Revealing The Functional Structure Of A New Pla2 K49 From Bothriopsis Taeniata Snake Venom Employing Automatic "de Novo" Sequencing Using Cid/hcd/etd Ms/ms Analyses
Registro en:
Journal Of Proteomics. Elsevier, v. 131, p. 131 - 139, 2016.
18743919
10.1016/j.jprot.2015.10.020
2-s2.0-84948184847
Institución
Resumen
Snake venoms are composed of approximately 90% of proteins with several pharmacological activities having high potential in research as biological tools. One of the most abundant compounds is phospholipases A2 (PLA2), which are the most studied venom protein due to their wide pharmacological activity. Using a combination of chromatographic steps, a new PLA2 K49 was isolated and purified from the whole venom of the Bothriopsis taeniata and submitted to analyses mass spectrometry. An automatic "de novo" sequencing of this new PLA2 K49 denominated Btt-TX was performed using Peaks Studio 6 for analysis of the spectra. Additionally, a triplex approach CID/HCD/ETD has been performed, to generate higher coverage of the sequence of the protein. Structural studies correlating biological activities were made associating specific Btt-TX regions and myotoxic activity. Lysine acetylation was performed to better understand the mechanism of membrane interaction, identifying the extreme importance of the highly hydrophobic amino acids L, P and F for disruption of the membrane. Our myotoxical studies show a possiblemembrane disruption mechanism by Creatine Kinase releasewithout a noticeablemuscle damage, that probably occurred without phospholipid hydrolyses, butwith a probable penetration of the hydrophobic amino acids present in the C-terminal region of the protein. © 2015 Elsevier B.V. 131
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