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    These Motors Were Made for Walking

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    Date
    2020-05-29
    Author
    Hunter, Byron
    Allingham, John
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    Abstract
    Kinesins are a diverse group of ATP‐dependent motor proteins that transport cargos along microtubules (MTs) and change the organization of MT networks. Shared among all kinesins is a ~ 40 kDa motor domain that has evolved an impressive assortment of motility and MT remodeling mechanisms as a result of subtle tweaks and edits within its sequence. Several elegant studies of different kinesin isoforms have exposed the purpose of structural changes in the motor domain as it engages and leaves the MT. However, few studies have compared the sequences and MT contacts of these kinesins systematically. Along with clever strategies to trap kinesin‐tubulin complexes for X‐ray crystallography, new advancements in cryo‐electron microscopy have produced a burst of high‐resolution structures that show kinesin–MT interfaces more precisely than ever. This review considers the MT interactions of kinesin subfamilies that exhibit significant differences in speed, processivity, and MT remodeling activity. We show how their sequence variations relate to their tubulin footprint and, in turn, how this explains the molecular activities of previously characterized mutants. As more high‐resolution structures become available, this type of assessment will quicken the pace toward establishing each kinesin’s design‐function relationship.
    URI for this record
    http://hdl.handle.net/1974/27903
    External DOI
    https://doi.org/10.1002/pro.3895
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    • Department of Biomedical and Molecular Sciences Faculty Publications
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