Evidence map›Paper›PMID 42239369›Full record

ArticlebioRxiv : the preprint server for biology2026

Biomolecular condensation of cMLCK enables myosin motor phosphorylation in the heart.

Kyler J Carl, Austin Wellette-Hunsucker, Ivanka R Sevrieva, Kenneth S Campbell, Xu Fu, Elisabeth Ehler, Thomas Kampourakis

Abstract readPreprint
In one paragraph

Article in bioRxiv : the preprint server for biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

7 authors.

Kyler J CarlDivision of Cardiovascular Medicine, College of Medicine, University of Kentucky, Kentucky, Lexington, USA.
Austin Wellette-HunsuckerDivision of Cardiovascular Medicine, College of Medicine, University of Kentucky, Kentucky, Lexington, USA.
Ivanka R SevrievaDivision of Cardiovascular Medicine, College of Medicine, University of Kentucky, Kentucky, Lexington, USA.
Kenneth S CampbellDivision of Cardiovascular Medicine, College of Medicine, University of Kentucky, Kentucky, Lexington, USA.ORCID 0000-0001-5615-5958
Xu FuLight Microscopy Core, College of Medicine, University of Kentucky, Kentucky, Lexington, USA.
Elisabeth EhlerRandall Centre for Cell and Molecular Biophysics, King's College London, London, SE1 1UL, United Kingdom; and King's College London British Heart Foundation Centre of Research Excellence, Guy's Campus, SE1 1UL, United Kingdom.
Thomas KampourakisDivision of Cardiovascular Medicine, College of Medicine, University of Kentucky, Kentucky, Lexington, USA.ORCID 0000-0002-8269-1567

Funding

Dual filament control of myocardial power and hemodynamicsR01HL148785 · NHLBI · UNIVERSITY OF MISSOURI-COLUMBIA · PI Kenneth S Campbell, Thomas Kampourakis · 2020 to 2026
$3.2M
Biological Basis of Genetic cMyBP-C CardiomyopathiesR01HL173989 · NHLBI · CASE WESTERN RESERVE UNIVERSITY · PI Kenneth S Campbell, Julian Stelzer · 2024 to 2026
$2.0M
NHLBI NIH HHS R01 HL148785NHLBI NIH HHS R01 HL173989
6 · The paper itself

Abstract

The heart needs to adapt its output to the metabolic demands of the organism. Phosphorylation of the myosin motors by cardiac myosin light chain kinase (cMLCK) increases heart muscle contractile function, yet its regulation and mechanism of action have remained unclear. Here, we show that cMLCK undergoes liquid-liquid phase separation and forms biomolecular condensates associated with the sarcoplasmic reticulum of cardiac muscle cells. Condensates selectively enrich enzymatic cofactors and substrates, which increases the catalytic activity of cMLCK. Our study reveals that cMLCK is fine-tuned to work in the molecular environment of condensates, enabling physiologically relevant levels of cardiac myosin motor phosphorylation. These findings establish a condensate-based mechanism for the spatial and temporal regulation of cardiac thick filament contractile function.

Identifiers

PMID42239369
PMCPMC13228355

What OpenQuestion holds

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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.