Journal
NATURE REVIEWS MOLECULAR CELL BIOLOGY
Volume 14, Issue 2, Pages 113-119Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nrm3510
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Funding
- US National Institutes of Health (NIH) [R01-HL083464, P30-AR061303]
- Muscular Dystrophy Association
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Correct specification of myofilament length is essential for efficient skeletal muscle contraction. The length of thin actin filaments can be explained by a novel 'two-segment' model, wherein the thin filaments consist of two concatenated segments, which are of either constant or variable length. This is in contrast to the classic 'nebulin ruler' model, which postulates that thin filaments are uniform structures, the lengths of which are dictated by nebulin. The two-segment model implicates position-specific microregulation of actin dynamics as a general principle underlying actin filament length and stability.
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