Kinesin-1 carries cargo along microtubules toward their plus ends. Two identical heads take turns: the rear head swings past the bound head and lands 16 nm ahead. The motor moves 8 nm and spends one ATP for each step. It makes about 100 steps before it lets go.
- Where
- Cytoplasm of eukaryotic cells, on microtubule tracks. The kinesin superfamily is present across eukaryotes.
- Power
- Hydrolysis of one ATP per 8 nm step, with Mg2+ as cofactor