Cited by 31Protein Structure and DynamicsCardiomyopathy and Myosin StudiesHeat shock proteins research

Trimethylamine N-oxide suppresses the activity of the actomyosin motor

Kumemoto, Ryusei, Yusa, Kento, Shibayama, Tomohiro, Hatori, Kuniyuki·2012·Biochimica et Biophysica Acta (BBA) - General Subjects

Abstract

Background During actomyosin interactions, the transduction of energy from ATP hydrolysis to motility seems to occur with the modulation of hydration. Trimethylamine N-oxide (TMAO) perturbs the surface of proteins by altering hydrogen bonding in a manner opposite to that of urea. Hence, we focus on the effects of TMAO on the motility and ATPase activation of actomyosin complexes.Methods Actin and heavy meromyosin (HMM) were prepared from rabbit skeletal muscle. Structural changes in HMM were detected using fluorescence and circular dichroism spectroscopy. The sliding velocity of rhodamine-phalloidin-bound actin filaments on HMM was measured using an in vitro motility assay. ATPase activity was measured using a malachite green method.Results Although TMAO, unlike urea, stabilized the HMM structure, both the sliding velocity and ATPase activity of acto-HMM were considerably decreased with increasing TMAO concentrations from 0-1.0M. Whereas urea-induced decreases in the structural stability of HMM were recovered by TMAO, TMAO further decreased the urea-induced decrease in ATPase activation. Urea and TMAO were found to have counteractive effects on motility at concentrations of 0.6M and 0.2M, respectively.Conclusions The excessive stabilization of the HMM structure by TMAO may suppress its activities; however, the counteractive effects of urea and TMAO on actomyosin motor activity is distinct from their effects on HMM stability.General significance The present results provide insight into not only the water-related properties of proteins, but also the physiological significance of TMAO and urea osmolytes in the muscular proteins of water-stressed animals.

Integrity signals

Registry

Crossref · 10.1016/j.bbagen.2012.06.006

Cites

31 of 31 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

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?

  • Excess TMAO in the absence of a perturbant can inhibit protein function as a result of overstabilization.

    “Both up-and down-regulation are important because excess TMAO in the absence of a perturbant (such as urea or pressure) can inhibit protein function as a result of overstabilization (19,27).”
  • High concentrations of TMAO may impair function, as reported for actomyosin motor activity.

    “By contrast, high concentrations of TMAO may at times also impair function, as was reported for the activity of the actomyosin motor142.”

    From Gut microbiota and cardiovascular disease. (2020) · cites this paper as [142]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Kumemoto, R., Yusa, K., Shibayama, T., & Hatori, K.
Affiliations
Yamagata University (JP)
Corresponding author
Hatori, Kuniyuki
Venue
Biochimica et Biophysica Acta (BBA) - General Subjects
Publisher
Elsevier BV
Published
2012-10
Volume
1820
Issue
10
Pages
1597-1604
ISSN
0304-4165 (ISSN-L)
OpenAlex
W2020783341
Cited by
31
References
31
Citations by year
2026: 1 · 2024: 3 · 2023: 1 · 2022: 4 · 2021: 3 · 2020: 3 · 2019: 3 · 2018: 2 · 2017: 1 · 2016: 3 · 2015: 3 · 2014: 3 · 2013: 1
FWCI
0.90
Type
journal article
Language
en
Open access
closed
Locations
  • Biochimica et Biophysica Acta (BBA) - General Subjects (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiomyopathy and Myosin Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
Keywords
trimethylamine N-oxide, actomyosin motor, heavy meromyosin, ATPase activity, sliding velocity, protein hydration, hydrogen bonding, urea, osmolytes, actin filament motility, protein stability
MeSH terms
Actomyosin, Adenosine Triphosphatases, Animals, Dose-Response Relationship, Drug, Methylamines, Actin Cytoskeleton, Movement, Osmolar Concentration, Rabbits, Urea, Down-Regulation, Myosin Subfragments, Multiprotein Complexes, Protein Stability, In Vitro Techniques

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