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- W2029341938 abstract "The ultra-rapid delayed rectifier potassium current (IKur), encoded by Kv1.5 gene, is the critical determinant of Phase I repolarization of action potential duration (APD). The evidences that Kv1.5 gene expresses more extensively in human atrial myocytes than in ventricle and the IKur currents has not been recorded in the human ventricle, suggest Kv1.5 potassium channel as a selective target for the treatment of atrial fibrillation (AF). Recent mutagenesis studies have provided us some evidences that are useful in designing Kv1.5 blockers. In order to further evaluate these molecular biological information, the homology model of Kv1.5 potassium channel was established based on the Kv1.2 crystal structure (PDB entry: 2A79) using MODELLER 9v2 program. After the molecular dynamics refinement, the optimized homology model was assessed as a reliable structure by PROCHECK, ERRAT, WHAT-IF, PROSA2003 and DOPE graph. The results of molecular docking studies on different Kv1.5 inhibitors are in agreement with the published mutagenesis data. Based on the docking conformations, a pharmacophore model was developed by HipHop algorithm in order to probe the common features of blockers. By analyzing the results, active site architecture, certain key residues and pharmacophore common-features that are responsible for substrate specificity were identified on the Kv1.5 potassium channel, which would be very helpful in understanding the blockade mechanism of Kv1.5 potassium channel and providing insights into rational design of novel Kv1.5 blockers." @default.
- W2029341938 created "2016-06-24" @default.
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- W2029341938 date "2008-09-01" @default.
- W2029341938 modified "2023-10-16" @default.
- W2029341938 title "Modeling the binding modes of Kv1.5 potassium channel and blockers" @default.
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- W2029341938 doi "https://doi.org/10.1016/j.jmgm.2008.04.002" @default.
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