Cited by 84Microtubule and mitosis dynamicsProtein Structure and DynamicsAdvanced Fluorescence Microscopy Techniques

ATP Reorients the Neck Linker of Kinesin in Two Sequential Steps

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Rosenfeld, Steven S., Jefferson, Geraldine M., King, Peter H.·2001·Journal of Biological Chemistry

Abstract

Recent models of the kinesin mechanochemical cycle provide some conflicting information on how the neck linker contributes to movement. Some spectroscopic approaches suggest a nucleotide-induced order-to-disorder transition in the neck linker. However, cryoelectron microscopic imaging suggests instead that nucleotide alters the orientation of the neck linker when docked on the microtubule surface. Furthermore, since these studies utilized transition state or non-hydrolyzable nucleotide analogs, it is not clear at what point in the ATPase cycle this reorientation of the neck linker occurs. We have addressed this issue by developing a strategy to examine the effect of nucleotide on the orientation of the neck linker based on the technique of fluorescence resonance energy transfer. Transient kinetic studies utilizing this approach support a model in which ATP binding leads to two sequential isomerizations, the second of which reorients the neck linker in relation to the microtubule surface.

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Crossref · 10.1074/jbc.m103899200

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  • Previous studies with K349 show that the rate of docking of the neck linker places an upper limit on kh of ∼800 s−1.

    “our previous studies with K349 show that the rate of docking of the neck linker places an upper limit on kh of ∼800 s−1 (23”

    From Stepping and Stretching (2003) · cites this paper as [23]

    The Discussion (page unavailable) proposes that a neck-linker reorientation step is rate-limiting for ATP hydrolysis, supporting the claimed relationship in qualified form. But the Results give a reorientation rate of 367 ± 51 s−1 at 10 °C, and the passages found do not establish an upper limit on kh of approximately 800 s−1. (LLM, conf=0.84)

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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 [23]

    The Results (page unavailable) measure ADP-induced dissociation in a construct derived from K349. They do not establish that this is the only affected step in K349 and K413, or report a 19-fold acceleration relative to wild-type. (LLM, conf=0.82)

    Experimental — accuracy not yet measured

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Authors
Rosenfeld, S. S., Jefferson, G. M., & King, P. H.
Affiliations
University of Alabama at Birmingham (US)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2001-10
Volume
276
Issue
43
Pages
40167-40174
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2062419779
Cited by
84
References
26
Citations by year
2026: 1 · 2025: 6 · 2024: 2 · 2023: 4 · 2022: 1 · 2021: 9 · 2020: 4 · 2019: 5 · 2018: 4 · 2016: 1 · 2015: 5 · 2014: 3 · 2013: 2 · 2012: 4
FWCI
1.47
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5p01ns034856-05)
  • National Institute of Neurological Disorders and Stroke (NS 34856)
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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Advanced Fluorescence Microscopy Techniques
Keywords
kinesin, neck linker, ATP binding, mechanochemical cycle, isomerization, ATPase cycle, fluorescence resonance energy transfer, transient kinetic analysis, order-disorder transition
MeSH terms
Adenosine Triphosphate, Dansyl Compounds, Energy Transfer, Microtubules, Models, Molecular, Models, Theoretical, Protein Conformation, Spectrometry, Fluorescence, Tryptophan, Tubulin, Kinesins, Dimerization, Molecular Motor Proteins

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