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lüll Potassium channel regulation Campbell JD; Sansom MS; Ashcroft FMEMBO Rep 2003[Nov]; 4 (11): 1038-42The sulphonylurea receptor (SUR) is a member of the ATP-binding cassette (ABC) family of membrane proteins. It functions as the regulatory subunit of the ATP-sensitive potassium (KATP) channel, which comprises SUR and Kir6.x proteins. Here, we review data demonstrating functional differences between the two nucleotide binding domains (NBDs) of SUR1. In addition, to explain the structural basis of these functional differences, we have constructed a molecular model of the NBD dimer of human SUR1. We discuss the experimental data in the context of this model, and show how the model can be used to design experiments aimed at elucidating the relationship between the structure and function of the KATP channel.|*Potassium Channels, Inwardly Rectifying[MESH]|ATP-Binding Cassette Transporters/chemistry/genetics/*physiology[MESH]|Amino Acid Sequence[MESH]|Genetic Diseases, Inborn/genetics/metabolism[MESH]|Humans[MESH]|Molecular Sequence Data[MESH]|Mutation[MESH]|Nucleotides/*metabolism[MESH]|Potassium Channels/chemistry/genetics/*physiology[MESH]|Protein Binding[MESH]|Protein Structure, Tertiary[MESH]|Receptors, Drug/chemistry/genetics/*physiology[MESH]|Sulfonylurea Receptors[MESH] |