Proteins {motor protein} can use ATP to bind to, and then slide on, microtubules. All eukaryotes have motor proteins. ATPases, kinesins, and dyneins are motor proteins.
kinesin
Kinesin-related proteins have similar 340-amino-acid motor domains, with one ATP-binding site and one tubulin microtubule-binding site. Microtubule-binding sites hold onto one protein strand, while ATP-binding site transfers other protein strand forward. Most kinesins move toward fast-growing microtubule end {microtubule plus}. Some kinesins move toward other microtubule end {microtubule minus}. C-terminal motor kinesin-related proteins move toward microtubule minus. Kinesin-related KHC, Unc-104, and KRP85/95 assist membrane-bound organelle transport, as well as mitosis and meiosis spindle and chromosome movements.
dynein
Cytoplasmic dyneins move microtubules that move cilia and flagella. Motor domains have elastic parts that strain and then release.
Biological Sciences>Cell>Protein>Motor
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Date Modified: 2022.0224