2bc3

T7-tagged full-length streptavidin

spinqualitylabelsall models 2bc3, resolution 1.54Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2bc3 is a 2 chain structure with sequence from As 4.1583. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GOL, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [SAV_STRAV] The biological function of streptavidin is not known. Forms a strong non-covalent specific complex with biotin (one molecule of biotin per subunit of streptavidin). 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 The structure of a full-length streptavidin has been determined at 1.7 A resolution and shows that the 20 residue extension at the C terminus forms a well-ordered polypeptide loop on the surface of the tetramer. Residues 150-153 of the extension are bound to the ligand-binding site, possibly competing with exogenous ligands. The binding mode of these residues is compared with that of biotin and peptidic ligands. The observed structure helps to rationalize the observations that full-length mature streptavidin binds biotinylated macromolecules with reduced affinity. Crystallographic analysis of a full-length streptavidin with its C-terminal polypeptide bound in the biotin binding site.,Le Trong I, Humbert N, Ward TR, Stenkamp RE J Mol Biol. 2006 Feb 24;356(3):738-45. Epub 2005 Dec 15. PMID:16384581 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Avidin 3D structures

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