1yxh

Crystal structure of a novel phospholipase A2 from Naja naja sagittifera with a strong anticoagulant activity

spinqualitylabelsall models 1yxh, resolution 1.86Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1yxh is a 1 chain structure with sequence from Naja sagittifera. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.86Å Ligands: CA, EOH, PO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PA2A4_NAJSG Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed This is the first PLA(2) crystal structure from group I that shows a strong anticoagulant property. The monomeric PLA(2) was purified from the venom of Naja naja sagittifera (Indian cobra). Its amino acid sequence has been determined using cDNA technique. The amino acid sequence of sPLA(2) contains three positively charged and two negatively charged residues in the segment 54-71 (numbering scheme of sPLA(2)) thus giving this region an overall cationic amphiphilic surface. This suggested the presence of an anticoagulant activity in sPLA(2). The enzyme was crystallized using hanging drop vapour diffusion method in the presence of calcium chloride. The crystals belong to space group P4(1) with cell dimensions of a=b=42.0A, c=65.9A. The X-ray crystal structure was determined at 1.8A resolution using molecular replacement method and refined to an R value of 0.179 for 10,023 reflections. The overall scaffolding of sPLA(2) is essentially similar to those observed for other group I PLA(2)s. However, the conformations of various surface loops were found to be significantly different. The most significant observation pertains to the anticoagulant loop in which both the acidic residues are engaged in intramolecular interactions whereas all the three basic residues are free to interact with other molecules. This makes the sPLA(2) a potentially strong anticoagulating molecule. Crystal structure of a novel phospholipase A2 from Naja naja sagittifera with a strong anticoagulant activity.,Jabeen T, Singh N, Singh RK, Ethayathulla AS, Sharma S, Srinivasan A, Singh TP Toxicon. 2005 Dec 15;46(8):865-75. Epub 2005 Nov 2. PMID:16269164 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phospholipase A2 Phospholipase A2 3D structures

Proteopedia Page Contributors and Editors (what is this?)

OCA