| First Author | Lu Q | Year | 2015 |
| Journal | Nat Struct Mol Biol | Volume | 22 |
| Issue | 1 | Pages | 81-8 |
| PubMed ID | 25437912 | Mgi Jnum | J:261060 |
| Mgi Id | MGI:6154505 | Doi | 10.1038/nsmb.2923 |
| Citation | Lu Q, et al. (2015) Structure of myosin-1c tail bound to calmodulin provides insights into calcium-mediated conformational coupling. Nat Struct Mol Biol 22(1):81-8 |
| abstractText | Class I myosins can sense cellular mechanical forces and function as tension-sensitive anchors or transporters. How mechanical load is transduced from the membrane-binding tail to the force-generating head in myosin-1 is unknown. Here we determined the crystal structure of the entire tail of mouse myosin-1c in complex with apocalmodulin, showing that myosin-1c adopts a stable monomer conformation suited for force transduction. The lever-arm helix and the C-terminal extended PH domain of the motor are coupled by a stable post-IQ domain bound to calmodulin in a highly unusual mode. Ca(2+) binding to calmodulin induces major conformational changes in both IQ motifs and the post-IQ domain and increases flexibility of the myosin-1c tail. Our study provides a structural blueprint for the neck and tail domains of myosin-1 and expands the target binding modes of the master Ca(2+)-signal regulator calmodulin. |
