2bbx

NMR solution structure of the TSR domain of malaria TRAP protein

spinqualitylabelsall models 2bbx Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2bbx is a 1 chain structure with sequence from Plasmodium falciparum. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR, 20 models Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TRAP_PLAFA 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 Thrombospondin-related anonymous protein, TRAP, has a critical role in the hepatocyte invasion step of Plasmodium sporozoites, the transmissible form of the parasite causing malaria. The extracellular domains of this sporozoite surface protein interact with hepatocyte surface receptors whereas its intracellular domain acts as a link to the sporozoite actomyosin motor system. Liver heparan sulfate proteoglycans have been identified as potential ligands for TRAP. Proteoglycan binding has been associated with the A- and TSR domains of TRAP. We present the solution NMR structure of the TSR domain of TRAP and a chemical shift mapping study of its heparin binding epitope. The domain has an elongated structure stabilized by an array of tryptophan and arginine residues as well as disulfide bonds. The fold is very similar to those of thrombospondin type-1 (TSP-1) and F-spondin TSRs. The heparin binding site of TRAP-TSR is located in the N-terminal half of the structure, the layered side chains forming an integral part of the site. The smallest heparin fragment capable of binding to TRAP-TSR is a tetrasaccharide. The layered fold of the TSR domain of P. falciparum TRAP contains a heparin binding site.,Tossavainen H, Pihlajamaa T, Huttunen TK, Raulo E, Rauvala H, Permi P, Kilpelainen I Protein Sci. 2006 Jul;15(7):1760-8. PMID:16815922 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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