Cited by 96Microtubule and mitosis dynamicsProtein Structure and DynamicsATP Synthase and ATPases Research

Kinetic Mechanism of a Monomeric Kinesin Construct

Open access
Ma, Yong-Ze, Taylor, Edwin W.·1997·Journal of Biological Chemistry

Abstract

The kinetic mechanism is analyzed for a monomeric human kinesin construct K332. In the absence of microtubules, the rate constants of the ATPase cycle are very similar to dimeric human kinesin K379 and whole kinesin from bovine brain. The microtubule-activated ATPase is 60 s(-1) at 20 degrees C; Km(Mt) is 5 microM; dissociation constants in the presence of ATP and ADP are 9 microM and 16 microM, respectively. The values of dissociation constants are 5 times larger than for K379. Binding of K332 to microtubules increased the rate of the hydrolysis step from 7 s(-1) to greater than 200 s(-1) and the 2'-(3')-O-(N-methylanthraniloyl) (mant) ADP dissociation step from 0.02 s(-1) to greater than 100 s(-1). At higher ionic strength, more than one ATP is hydrolyzed before dissociation of MtK332 (small processivity). Data are fitted to the kinetic scheme. [equation: see text] Approximate values of rate constants are k1 = 500 s(-1), k2 > or = 200 s(-1), k3k4/(k3 + k4) = 100 s(-1), k(dis) = 80+/-10 s(-1). Two experiments to measure k4 gave 110 s(-1) from the maximum rate of dissociation of mant ADP for reaction of K x ADP with microtubules and 300 s(-1) from extrapolation to zero concentration of rate of binding of mant ADP to MtK. It is proposed that mant ADP dissociation is a two-step process. In the simple scheme, k4 is the effective rate of the two-step release of ADP, k4 = 150 s(-1) to 200 s(-1), and k3 = 150 s(-1) to 200 s(-1) to account for the steady state rate.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1074/jbc.272.2.717

Cites

17 of 17 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Direct measurements show that kh is ∼100 s−1 for dimeric constructs and considerably faster for monomers, with estimates placing it at >250 s−1.

    “Direct measurements using chemical quench methods have consistently shown that, althoughkh is ∼100 s−1 for dimeric constructs, it is considerably faster for monomers, with estimates placing it at >250 s−1 (2”

    From Stepping and Stretching (2003) · cites this paper as [2]

    In “The Hydrolysis Step” (page not supplied), the monomer’s phosphate-burst transient is reported as >250 s−1, but the paper estimates the hydrolysis step itself at ≥200 s−1—not >250 s−1. The cited passages also do not establish a hydrolysis rate of approximately 100 s−1 for dimeric constructs. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • Members of the kinesin family of molecular motors are capable of taking over 100 steps on their microtubule track without dissociating.

    “Members of the kinesin family of molecular motors are capable of taking over 100 steps on their microtubule track without dissociating”

    From Stepping and Stretching (2003) · cites this paper as [2]

    The Abstract and Pathway of Dissociation section describe a monomeric kinesin construct with small processivity: it can complete more than one ATPase cycle before dissociating. The paper does not establish that kinesin motors take over 100 steps along a microtubule without dissociating. (LLM, conf=0.82)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 18 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. Hackney, D. D. (1994) Proc. Natl. Acad. Sci. U. S. A. 91, 6865-6869

Cited by

Sorted by citations

Authors
Ma, Y.-Z., & Taylor, E. W.
Affiliations
University of Chicago (US)
Corresponding author
Taylor, Edwin W.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1997-01
Volume
272
Issue
2
Pages
717-723
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2043341507
Cited by
96
References
18
Citations by year
2025: 5 · 2024: 2 · 2017: 2 · 2016: 3 · 2015: 3 · 2014: 4 · 2013: 2 · 2012: 3
FWCI
2.59
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01gm051858-04)
  • National Institute of General Medical Sciences (GM 51858)
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 › Molecular Biology › ATP Synthase and ATPases Research
Keywords
kinesin, ATPase kinetics, microtubule binding, ADP dissociation, ATP hydrolysis, processivity, kinetic mechanism, rate constants
MeSH terms
Adenosine Diphosphate, Adenosine Triphosphate, Animals, Cattle, Dose-Response Relationship, Drug, Humans, Kinetics, Microtubules, Protein Conformation, Spectrometry, Fluorescence, Kinesins

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review