Cited by 278Cardiomyopathy and Myosin StudiesCardiac electrophysiology and arrhythmiasCardiovascular Effects of Exercise

Metavinculin mutations alter actin interaction in dilated cardiomyopathy

Olson, Timothy M., Illenberger, Susanne, Kishimoto, Nina Y., Huttelmaier, Stefan, Keating, Mark T., Jockusch, Brigitte M.·2002·Circulation

Abstract

BACKGROUND: Vinculin and its isoform metavinculin are protein components of intercalated discs, structures that anchor thin filaments and transmit contractile force between cardiac myocytes. We tested the hypothesis that heritable dysfunction of metavinculin may contribute to the pathogenesis of dilated cardiomyopathy (DCM). METHODS AND RESULTS: We performed mutational analyses of the metavinculin-specific exon of vinculin in 350 unrelated patients with DCM. One missense mutation (Arg975Trp) and one 3-bp deletion (Leu954del) were identified. These mutations involved conserved amino acids, were absent in 500 control individuals, and significantly altered metavinculin-mediated cross-linking of actin filaments in an in vitro assay. Ultrastructural examination was performed in one patient (Arg975Trp), revealing grossly abnormal intercalated discs. A potential risk-conferring polymorphism (Ala934Val), identified in one DCM patient and one control individual, had a less pronounced effect on actin filament cross-linking. CONCLUSIONS: These data provide genetic and functional evidence for vinculin as a DCM gene and suggest that metavinculin plays a critical role in cardiac structure and function. Disruption of force transmission at the thin filament-intercalated disc interface is the likely mechanism by which mutations in metavinculin may lead to DCM.

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  1. Cormack B. Mutagenesis by the polymerase chain reaction. In: Ausubel F, Brent R, Kingston R, et al, eds. Current Protocols in Molecular Biology. New York, NY: John Wiley and Sons; 1991:8.5.1-8.5.9.

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Authors
Olson, T. M., Illenberger, S., Kishimoto, N. Y., Huttelmaier, S., Keating, M. T., & Jockusch, B. M.
Affiliations
  • Howard Hughes Medical Institute (US)
  • From the Department of Pediatrics and the Division of Cardiology (T.M.O., N.Y.K.) and the Departments of Human Genetics and Medicine, Division of Cardiology, and Howard Hughes Medical Institute (M.T.K.), University of Utah, Salt Lake City, Utah; and Cell Biology, Zoological Institute (S.I., S.H., B.M.J.), Technical University of Braunschweig, Braunschweig, Germany. Dr Keating currently is at the Department of Cell Biology, Harvard Medical School and the Department of Cardiology, Children’s Hospital,...
Venue
Circulation
Published
2002-01-29
Volume
105
Issue
4
Pages
431-437
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W1991072112
Cited by
278
References
25
Citations by year
2026: 1 · 2025: 7 · 2024: 9 · 2023: 8 · 2022: 7 · 2021: 7 · 2020: 7 · 2019: 14 · 2018: 3 · 2017: 9 · 2016: 16 · 2015: 11 · 2014: 8 · 2013: 10 · 2012: 13
FWCI
11.13
Type
journal article
Language
en
Open access
closed
Locations
  • Circulation (publishedVersion)
  • PubMed (publishedVersion)
Funders
American Heart Association
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiomyopathy and Myosin Studies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Effects of Exercise
Keywords
metavinculin, dilated cardiomyopathy, vinculin, intercalated discs, actin filament cross-linking, thin filament, missense mutations, force transmission
MeSH terms
Actins, Adult, Aged, Amino Acid Sequence, Cardiomyopathy, Dilated, DNA Mutational Analysis, Humans, Actin Cytoskeleton, Middle Aged, Molecular Sequence Data, Mutation, Myocardium, Pedigree, Sequence Alignment, Vinculin, Conserved Sequence

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