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The structure of the carboxy-terminal domain of bovine calmodulin, TR 2 C, in the calcium-free form was investigated using two-dimensional 1 H NMR. Sequential resonance assignments were made using standard methods. Using information from medium and long range contacts revealed by nuclear Overhauser enhancement, the secondary structure and global fold were determined. The apo protein...
Myosin light chain kinase contains a regulatory segment consisting of an autoinhibitory region and a calmodulin-binding sequence that folds back on its catalytic core to inhibit kinase activity. It has been proposed that α-helix formation may be involved in displacement of the regulatory segment and activation of the kinase by Ca 2+ /calmodulin. Proline mutations were introduced at putative...
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