1Y4L

Crystal structure of Bothrops asper myotoxin II complexed with the anti-trypanosomal drug suramin

Summary for 1Y4L

• Entry DOI: 10.2210/pdb1y4l/pdb
• Related: 1CLP
• Descriptor: Phospholipase A2 homolog 2, 3,6,9,12,15,18-HEXAOXAICOSANE-1,20-DIOL, ISOPROPYL ALCOHOL, ... (5 entities in total)
• Functional Keywords: bothrops asper myotoxin ii, anti-trypanosomal drug suramin, hydrolase
• Biological source: Bothrops asper (terciopelo)
• Cellular location: Secreted: P24605
• Total number of polymer chains: 2
• Total formula weight: 29778.80

Authors

Murakami, M.T.,Arruda, E.Z.,Melo, P.A.,Martinez, A.B.,Calil-Elias, S.,Tomaz, M.A.,Lomonte, B.,Gutierrez, J.M.,Arni, R.K. (deposition date: 2004-12-01, release date: 2005-06-28, Last modification date: 2024-11-06)

Primary citation

Murakami, M.T.,Arruda, E.Z.,Melo, P.A.,Martinez, A.B.,Calil-Elias, S.,Tomaz, M.A.,Lomonte, B.,Gutierrez, J.M.,Arni, R.K.
Inhibition of Myotoxic Activity of Bothrops asper Myotoxin II by the Anti-trypanosomal Drug Suramin.
J.Mol.Biol., 350:416-426, 2005

PubMed Abstract: Suramin, a synthetic polysulfonated compound, developed initially for the treatment of African trypanosomiasis and onchocerciasis, is currently used for the treatment of several medically relevant disorders. Suramin, heparin, and other polyanions inhibit the myotoxic activity of Lys49 phospholipase A2 analogues both in vitro and in vivo, and are thus of potential importance as therapeutic agents in the treatment of viperid snake bites. Due to its conformational flexibility around the single bonds that link the central phenyl rings to the secondary amide backbone, the symmetrical suramin molecule binds by an induced-fit mechanism complementing the hydrophobic surfaces of the dimer and adopts a novel conformation that lacks C2 symmetry in the dimeric crystal structure of the suramin-Bothrops asper myotoxin II complex. The simultaneous binding of suramin at the surfaces of the two monomers partially restricts access to the nominal active sites and significantly changes the overall charge of the interfacial recognition face of the protein, resulting in the inhibition of myotoxicity.

PubMed: 15961104
DOI: 10.1016/j.jmb.2005.04.072

Experimental method

X-RAY DIFFRACTION (1.7 Å)