1aei | pdb_00001aei

CRYSTAL STRUCTURE OF THE ANNEXIN XII HEXAMER

spinqualitylabelsall models 1aei, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1aei is a 6 chain structure with sequence from Hydra vulgaris. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA Resources: FirstGlance, OCA, RCSB, PDBsum 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 Annexins are a family of calcium- and phospholipid-binding proteins implicated in a number of biological processes including membrane fusion and ion channel formation. The crystal structure of the annexin XII hexamer, refined at 2.8 A resolution, forms a concave disk with 3-2 symmetry, about 100 A in diameter and 70 A thick with a central hydrophilic pore. Six intermolecular Ca2+ ions are involved in hexamer formation. An additional 18 Ca2+ ions are located on the perimeter of the disk, accessible only from the side of the hexameric disk. On the basis of the hexamer structure we propose here a new mode of protein-phospholipid bilayer interaction that is distinct from the hydrophobic insertion of typical membrane proteins. This speculative model postulates the Ca(2+)-dependent insertion of the hydrophilic annexin XII hexamer into phospholipid bilayers with local reorientation of the bilayer phospholipids. Crystal structure of the annexin XII hexamer and implications for bilayer insertion.,Luecke H, Chang BT, Mailliard WS, Schlaepfer DD, Haigler HT Nature. 1995 Nov 30;378(6556):512-5. PMID:7477411 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Annexin

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