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- W2149589552 abstract "In most organisms, kinesin-5 motors are essential for mitosis and meiosis, where they crosslink and slide apart the antiparallel microtubule half-spindles. Recently, it was shown using single-molecule optical trapping that a truncated, double-headed human kinesin-5 dimer can step processively along microtubules. However, processivity is limited ( approximately 8 steps) with little coordination between the heads, raising the possibility that kinesin-5 motors might also be able to move by a nonprocessive mechanism. To investigate this, we engineered single-headed kinesin-5 dimers. We show that a set of these single-headed Eg5 dimers drive microtubule sliding at about 90% of wild-type velocity, indicating that Eg5 can slide microtubules by a mechanism in which one head of each Eg5 head-pair is effectively redundant. On the basis of this, we propose a muscle-like model for Eg5-driven microtubule sliding in spindles in which most force-generating events are single-headed interactions and alternate-heads processivity is rare." @default.
- W2149589552 created "2016-06-24" @default.
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- W2149589552 date "2008-06-13" @default.
- W2149589552 modified "2023-10-11" @default.
- W2149589552 title "Single‐headed mode of kinesin‐5" @default.
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- W2149589552 doi "https://doi.org/10.1038/embor.2008.96" @default.
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