Cited by 54Microtubule and mitosis dynamicsAdvanced Fluorescence Microscopy TechniquesProtein Structure and Dynamics

Measuring Kinesin's First Step

Open access
Rosenfeld, Steven S., Xing, Jun, Jefferson, Geraldine M., Cheung, Herbert C., King, Peter H.·2002·Journal of Biological Chemistry

Abstract

A variety of models have recently emerged to explain how the molecular motor kinesin is able to maintain processive movement for over 100 steps. Although these models differ in significant features, they all predict that kinesin's catalytic domains intermittently separate from each other as the motor takes 8-nm steps along the microtubule. Furthermore, at some point in this process, one molecule of ATP is hydrolyzed per step. However, exactly when hydrolysis and product release occur in relation to this forward step have not been established. Furthermore, the rate at which this separation occurs as well as the speed of motor stepping onto and release from the microtubule have not been measured. In the absence of this information, it is difficult to critically evaluate competing models of kinesin function. We have addressed this issue by developing spectroscopic probes whose fluorescence is sensitive to motor-motor separation or microtubule binding. The kinetics of these fluorescence changes allow us to directly measure how fast kinesin steps onto and releases from the microtubule and provide insight into how processive movement is maintained by this motor.

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Crossref · 10.1074/jbc.m205261200

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  • Kinetic characterizations of K349 and K413 show that only one step in the mechanochemical cycle is affected: the rate of ADP-induced dissociation, which is accelerated 19-fold compared with wild-type.

    “Our kinetic characterizations of K349 and K413 has shown that only one step in the mechanochemical cycle is affected (18, 23, and this work). This is the rate of ADP-induced dissociation, which is accelerated 19-fold compared with wild-type (Fig. 4).”

    From Stepping and Stretching (2003) · cites this paper as [18]

    The Discussion says mutagenesis accelerated ADP-induced release from microtubules while having little effect on ATPase activity or processivity. The Measurement of ATPase Activity and Processivity section reports that this release was approximately 7–8-fold faster than in native kinesin, not 19-fold, and does not establish that no other mechanochemical step was affected. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • AMPPNP leads to immobilization of both neck linkers.

    “and to immobilization of both neck linkers (18”

    From Stepping and Stretching (2003) · cites this paper as [18]

  • Adding AMPPNP to a kinesin-microtubule complex induces the two neck linkers to separate from each other, similar to what is seen when kinesin takes a forward step with ATP binding.

    “Adding AMPPNP to a kinesin-microtubule complex induces the two neck linkers to separate from each other, in a manner similar to what is seen when kinesin takes a forward step with ATP binding (18”

    From Stepping and Stretching (2003) · cites this paper as [18]

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Research works printed but not linked: 6

  1. Hancock, W. O., and Howard, J. (1999) Proc. Natl. Acad. Sci. U. S. A. 96, 13147-13152
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Authors
Rosenfeld, S. S., Xing, J., Jefferson, G. M., Cheung, H. C., & King, P. H.
Affiliations
University of Alabama at Birmingham (US)
Corresponding author
Rosenfeld, Steven S.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2002-09
Volume
277
Issue
39
Pages
36731-36739
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2000315199
Cited by
54
References
42
Citations by year
2026: 1 · 2023: 1 · 2021: 2 · 2020: 1 · 2019: 2 · 2018: 3 · 2017: 2 · 2016: 1 · 2015: 3 · 2014: 3 · 2013: 1 · 2012: 2
FWCI
2.31
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
University of Pittsburgh
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Advanced Fluorescence Microscopy Techniques
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
kinesin, microtubule binding, ATP hydrolysis, step kinetics, fluorescent probes, microtubule motor proteins
MeSH terms
Adenosine Diphosphate, Adenosine Triphosphatases, Adenosine Triphosphate, Animals, Cysteine, Dose-Response Relationship, Drug, Energy Transfer, Fluorescent Dyes, Hydrolysis, Kinetics, Ligands, Microtubules, Models, Biological, Models, Molecular, Mutation, Potassium Chloride, Protein Binding, Spectrometry, Fluorescence, Spectrophotometry, Time Factors, Kinesins, Anisotropy, Protein Structure, Tertiary, Dimerization, Rats

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