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Cited by 297

The DOI matches its Crossref record; 12 of the 12 references it cites were found in a registry or an index.

Processivity of the Motor Protein Kinesin Requires Two Heads

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Hancock, William O., Howard, Jonathon·1998·The Journal of Cell Biology

Abstract

A single kinesin molecule can move for hundreds of steps along a microtubule without dissociating. One hypothesis to account for this processive movement is that the binding of kinesin's two heads is coordinated so that at least one head is always bound to the microtubule. To test this hypothesis, the motility of a full-length single-headed kinesin heterodimer was examined in the in vitro microtubule gliding assay. As the surface density of single-headed kinesin was lowered, there was a steep fall both in the rate at which microtubules landed and moved over the surface, and in the distance that microtubules moved, indicating that individual single-headed kinesin motors are not processive and that some four to six single-headed kinesin molecules are necessary and sufficient to move a microtubule continuously. At high ATP concentration, individual single-headed kinesin molecules detached from microtubules very slowly (at a rate less than one per second), 100-fold slower than the detachment during two-headed motility. This slow detachment directly supports a coordinated, hand-over-hand model in which the rapid detachment of one head in the dimer is contingent on the binding of the second head.

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Metadata

Authors
Hancock, W. O., & Howard, J.
Venue
The Journal of Cell Biology
Published
1998-03-23
Volume
140
Issue
6
Pages
1395-1405
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2071777531
Cited by
297
References
12
FWCI
6.90
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Processivity of the Motor Protein Kinesin Requires Two Heads. https://app.cochat.ai/papers/10.1083/jcb.140.6.1395
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Hancock, W. O., & Howard, J. (1998). Processivity of the Motor Protein Kinesin Requires Two Heads. The Journal of Cell Biology. https://doi.org/10.1083/jcb.140.6.1395

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