Abstract
A homology model of human choline kinase (CK-alpha) based on the X-ray crystallographic structure of C. elegans choline kinase (CKA-2) is presented. Molecular dynamics simulations performed on CK-alpha confirm the quality of the model, and also support the putative ATP and choline binding sites. A good correlation between the MD results and reported CKA-2 mutagenesis assays has been found for the main residues involved in catalytic activity. Preliminary docking studies performed on the CK-alpha model indicate that inhibitors can bind to the binding sites of both substrates (ATP and choline). A possible reason for inhibition of choline kinase by Ca(2+) ion is also proposed.
Published Version
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