Structural insights for fatty acid binding in a Lys49-phospholipase A(2): crystal structure of myotoxin II from Bothrops moojeni complexed with stearic acidWatanabe, L., Soares, A.M., Ward, R.J., Fontes, M.R., Arni, R.K.
(2005) Biochimie 87: 161-167
- PubMed: 15760708
- DOI: 10.1016/j.biochi.2004.11.005
- PubMed Abstract:
- Crystal Structure of miotoxin-II: a myotoxic phospholipase A2 homologue from Bothrops moojeni venom
de Azevedo Jr., W.F.,Ward, R.J.,Lombardi, F.R.,Giglio, J.R.,Soares, A.M.,Fontes, M.R.M.,Arni, R.K.
(1997) PROTEIN PEPT.LETT. 4: 329
- A rapid procedure for the isolation of the Lys-49 myotoxin II from Bothrops moojeni (caissaca) venom: biochemical characterization, crystallization, myotoxic and edematogenic activity
Soares, A.M.,Rodrigues, V.M.,Homsi-Brandeburgo, M.I.,Toyama, M.H.,Lombardi, F.R.,Arni, R.K.,Giglio, J.R.
(1998) Toxicon 36: 503
- Initiating structural studies of Lys49-PLA2 homologues complexed with an anionic detergent, a fatty acid and a natural lipid
Watanabe, L.,Fontes, M.R.,Soares, A.M.,Giglio, J.R.,Arni, R.K.
(2003) PROTEIN PEPT.LETT. 10: 525
- Structural and functional characterization of myotoxin I, a Lys49 phospholipase A(2) homologue from Bothrops moojeni (Caissaca) snake venom
Soares, A.M.,Andriao-Escarso, S.H.,Angulo, Y.,Lomonte, B.,Gutierrez, J.M.,Marangoni, S.,Toyama, M.H.,Arni, R.K.,Giglio, J.R.
(2000) Arch.Biochem.Biophys. 373: 7
The crystal structure of dimeric Lys49-phospholipase A2 myotoxin-II from Bothrops moojeni (MjTX-II) co-crystallized with stearic acid (C(18)H(36)O(2)) has been determined at a resolution of 1.8 A. The electron density maps permitted the unambiguous i ...
The crystal structure of dimeric Lys49-phospholipase A2 myotoxin-II from Bothrops moojeni (MjTX-II) co-crystallized with stearic acid (C(18)H(36)O(2)) has been determined at a resolution of 1.8 A. The electron density maps permitted the unambiguous inclusion of six stearic acid molecules in the refinement. Two stearic acid molecules could be located in the substrate-binding cleft of each monomer in positions, which favor the interaction of their carboxyl groups with active site residues. The way of binding of stearic acids to this Lys49-PLA(2)s is analogous to phospholipids and transition state analogues to catalytically active PLA(2)s. Two additional stearic acid molecules were located at the dimer interface region, defining a hitherto unidentified acyl-binding site on the protein surface. The strictly conserved Lys122 for Lys49-PLA(2)s may play a fundamental role for stabilization of legend-protein complex. The comparison of MjTX-II/satiric acid complex with other Lys-PLA(2)s structures whose putative fatty acids were located at their active site is also analysed. Molecular details of the stearic acid/protein interactions provide insights to binding in group I/II PLA(2)s, and to the possible interactions of Lys49-PLA(2)s with target membranes.
Departamento de Física, IBILCE, UNESP, S. J. do Rio Preto-SP, Brazil.