1ors

X-ray structure of the KvAP potassium channel voltage sensor in complex with an Fab

spinqualitylabelsall models 1ors, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1ors is a 3 chain structure with sequence from Aerpx and Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 1orq Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [KVAP_AERPE] Mediates a strong voltage-dependent potassium ion permeability of excitable membranes. Assuming opened or closed conformations in response to the voltage difference across the membrane, the protein forms a potassium-selective channel through which potassium ions may pass in accordance with their electrochemical gradient. 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 Voltage-dependent K+ channels are members of the family of voltage-dependent cation (K+, Na+ and Ca2+) channels that open and allow ion conduction in response to changes in cell membrane voltage. This form of gating underlies the generation of nerve and muscle action potentials, among other processes. Here we present the structure of KvAP, a voltage-dependent K+ channel from Aeropyrum pernix. We have determined a crystal structure of the full-length channel at a resolution of 3.2 A, and of the isolated voltage-sensor domain at 1.9 A, both in complex with monoclonal Fab fragments. The channel contains a central ion-conduction pore surrounded by voltage sensors, which form what we call 'voltage-sensor paddles'-hydrophobic, cationic, helix-turn-helix structures on the channel's outer perimeter. Flexible hinges suggest that the voltage-sensor paddles move in response to membrane voltage changes, carrying their positive charge across the membrane. X-ray structure of a voltage-dependent K+ channel.,Jiang Y, Lee A, Chen J, Ruta V, Cadene M, Chait BT, MacKinnon R Nature. 2003 May 1;423(6935):33-41. PMID:12721618 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Monoclonal Antibodies 3D structures

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