Evidence map›Paper›PMID 29055011›Full record

ArticleThe Journal of cell biology2017

UNC-45a promotes myosin folding and stress fiber assembly.

Jaakko I Lehtimäki, Aidan M Fenix, Tommi M Kotila, Giuseppe Balistreri, Lassi Paavolainen, Markku Varjosalo, Dylan T Burnette, Pekka Lappalainen

Open access · greenAbstract read
In one paragraph

Article in The Journal of cell biology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
2.8field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

32 citing papers in PubMed, 52 citations in OpenAlex.

  1. Article
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  8. LUZP1 regulates the maturation of contractile actomyosin bundles.Cellular and molecular life sciences : CMLS · 2024
    Article
  9. Review
  10. Review
  11. Article
  12. Article
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  14. A myosin chaperone, UNC-45A, is a novel regulator of intestinal epithelial barrier integrity and repair.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2022
    Article
  15. Article
  16. Article
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  19. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 2 institutions in 2 countries.

Jaakko I LehtimäkiInstitute of Biotechnology, University of Helsinki, Helsinki, Finland.
Aidan M FenixDepartment of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN.
Tommi M KotilaInstitute of Biotechnology, University of Helsinki, Helsinki, Finland.ORCID 0000-0002-9046-5834
Giuseppe BalistreriDepartment of Biosciences, Division of General Microbiology, University of Helsinki, Helsinki, Finland.
Lassi PaavolainenInstitute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland.
Markku VarjosaloInstitute of Biotechnology, University of Helsinki, Helsinki, Finland.
Dylan T BurnetteDepartment of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN.
Pekka LappalainenInstitute of Biotechnology, University of Helsinki, Helsinki, Finland pekka.lappalainen@helsinki.fi.ORCID 0000-0001-6227-0354
University of Helsinki · FIVanderbilt University · US

Funding

MOLECULAR BIOPHYSICS TRAINING PROGRAM AT VANDERBILTT32GM008320 · NIGMS · VANDERBILT UNIVERSITY · PI CHAZIN, WALTER J. · 1989 to 2023
$7.9M
The assembly and function of cellular contractile systemsR35GM125028 · NIGMS · VANDERBILT UNIVERSITY · PI Dylan Tyler Burnette · 2017 to 2026
$4.2M
Investigating the mechanisms of beta cardiac myosin II during sarcomere formation and functionF31HL136081 · NHLBI · VANDERBILT UNIVERSITY · PI FENIX, AIDAN MANDY · 2017 to 2018
$54k
American Heart Association-American Stroke Association 17SDG33460353NHLBI NIH HHS F31 HL136081NIGMS NIH HHS R35 GM125028NIGMS NIH HHS T32 GM008320
6 · The paper itself

Abstract

Contractile actomyosin bundles, stress fibers, are crucial for adhesion, morphogenesis, and mechanosensing in nonmuscle cells. However, the mechanisms by which nonmuscle myosin II (NM-II) is recruited to those structures and assembled into functional bipolar filaments have remained elusive. We report that UNC-45a is a dynamic component of actin stress fibers and functions as a myosin chaperone in vivo. UNC-45a knockout cells display severe defects in stress fiber assembly and consequent abnormalities in cell morphogenesis, polarity, and migration. Experiments combining structured-illumination microscopy, gradient centrifugation, and proteasome inhibition approaches revealed that a large fraction of NM-II and myosin-1c molecules fail to fold in the absence of UNC-45a. The remaining properly folded NM-II molecules display defects in forming functional bipolar filaments. The C-terminal UNC-45/Cro1/She4p domain of UNC-45a is critical for NM-II folding, whereas the N-terminal tetratricopeptide repeat domain contributes to the assembly of functional stress fibers. Thus, UNC-45a promotes generation of contractile actomyosin bundles through synchronized NM-II folding and filament-assembly activities.

Indexed as

ActomyosinCell AdhesionCell Line, TumorCell MovementCell PolarityGene ExpressionHumansIntracellular Signaling Peptides and ProteinsMyosin Type IIOsteoblastsProteasome Endopeptidase ComplexProtein FoldingProtein IsoformsStress FibersTetratricopeptide RepeatActomyosinIntracellular Signaling Peptides and ProteinsMyosin Type IIProteasome Endopeptidase ComplexProtein IsoformsUNC45A protein, human

Identifiers

PMID29055011
PMCPMC5716280
OpenAlexW2766092740

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.