Cited by 177Microtubule and mitosis dynamicsProtein Structure and DynamicsForce Microscopy Techniques and Applications

Highly processive microtubule-stimulated ATP hydrolysis by dimeric kinesin head domains

Hackney, David D.·1995·Nature

Abstract

Studies of immobilized kinesin have shown that a single dimeric molecule can maintain contact with and drive sliding of a microtubule. In solution, however, native kinesin binds microtubules too weakly and hydrolyses ATP too slowly to produce the high sliding velocities seen in motility assay. This apparent inhibition in solution appears to be caused by the binding of kinesin's tail domains to its motor (head) domains in a folded conformation. DKH392, a construct containing two heads but no tails, has been shown to display both tight binding to microtubules and high ATPase rates. Furthermore, it retains one molecule of ADP per dimer when bound to microtubules, which could facilitate a 'hand-over-hand' mechanism for processive motion. Here we show that DKH392 hydrolyses more than 100 ATP molecules per diffusional encounter with a microtubule, even in the high-salt conditions encountered physiologically. This provides direct evidence that kinesin's activity is highly processive, with the motor remaining attached to a microtubule through many cycles of ATP hydrolysis.

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Crossref · 10.1038/377448a0

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  • The kcat value of Pkl1 is smaller than that reported for kinesin-1 (~50 s−1) but similar to those of Ncd, Kar3, and Eg5.

    “the k cat value was smaller than that reported for kinesin-1 (ϳ50 s Ϫ1 ) (33,34) but was similar to those of Ncd, Kar3, and Eg5.”

    From Diffusion and Directed Movement (2008) · cites this paper as [33]

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Authors
Hackney, D. D.
Affiliations
Carnegie Mellon University (US)
Corresponding author
Hackney, David D.
Venue
Nature
Published
1995-10
Volume
377
Issue
6548
Pages
448-450
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2049953608
Cited by
177
References
13
Citations by year
2026: 4 · 2024: 7 · 2023: 1 · 2022: 1 · 2021: 3 · 2020: 1 · 2019: 4 · 2018: 1 · 2017: 4 · 2016: 4 · 2015: 5 · 2014: 2 · 2013: 1 · 2012: 5
FWCI
4.03
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Force Microscopy Techniques and Applications
Keywords
kinesin, microtubule sliding, ATP hydrolysis, processivity, microtubule binding, ADP binding, hand-over-hand mechanism, high-salt conditions, motility assay
MeSH terms
Adenosine Diphosphate, Adenosine Triphosphate, Hydrolysis, Microtubules, Kinesins

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