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    Voltage sensing mechanism in skeletal muscle excitation-contraction coupling: Coming of age or midlife crisis?

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    Author
    Hernández-Ochoa, E.O.
    Schneider, M.F.
    Date
    2018
    Journal
    Skeletal Muscle
    Publisher
    BioMed Central Ltd.
    Type
    Review
    
    Metadata
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    See at
    https://dx.doi.org/10.1186/s13395-018-0167-9
    Abstract
    The process by which muscle fiber electrical depolarization is linked to activation of muscle contraction is known as excitation-contraction coupling (ECC). Our understanding of ECC has increased enormously since the early scientific descriptions of the phenomenon of electrical activation of muscle contraction by Galvani that date back to the end of the eighteenth century. Major advances in electrical and optical measurements, including muscle fiber voltage clamp to reveal membrane electrical properties, in conjunction with the development of electron microscopy to unveil structural details provided an elegant view of ECC in skeletal muscle during the last century. This surge of knowledge on structural and biophysical aspects of the skeletal muscle was followed by breakthroughs in biochemistry and molecular biology, which allowed for the isolation, purification, and DNA sequencing of the muscle fiber membrane calcium channel/transverse tubule (TT) membrane voltage sensor (Cav1.1) for ECC and of the muscle ryanodine receptor/sarcoplasmic reticulum Ca2+ release channel (RyR1), two essential players of ECC in skeletal muscle. In regard to the process of voltage sensing for controlling calcium release, numerous studies support the concept that the TT Cav1.1 channel is the voltage sensor for ECC, as well as also being a Ca2+ channel in the TT membrane. In this review, we present early and recent findings that support and define the role of Cav1.1 as a voltage sensor for ECC. © 2018 The Author(s).
    Sponsors
    This publication was supported by the National Institute of Arthritis and Musculoskeletal and Skin Diseases of the National Institutes of Health under Award Number R37-AR055099 (to M. F. S.). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.
    Keyword
    Ca2+ release
    charge movement
    DHPR/Cav1.1
    L-type voltage-gated calcium channel
    RyR1
    voltage sensors
    Excitation Contraction Coupling
    Muscle, Skeletal
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050255472&doi=10.1186%2fs13395-018-0167-9&partnerID=40&md5=d49da14cb3600f5f8e763556c84abda9; http://hdl.handle.net/10713/8782
    ae974a485f413a2113503eed53cd6c53
    10.1186/s13395-018-0167-9
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