Thick Filament Protein Network, Functions, and Disease Association

Overview

Journal Compr Physiol

Specialty Physiology

Date 2018 Apr 25

PMID 29687901

Citations 45

Authors

Li Wang

Janelle Geist

Alyssa Grogan

Li-Yen R Hu

Aikaterini Kontrogianni-Konstantopoulos

Affiliations

Soon will be listed here.

Abstract

Sarcomeres consist of highly ordered arrays of thick myosin and thin actin filaments along with accessory proteins. Thick filaments occupy the center of sarcomeres where they partially overlap with thin filaments. The sliding of thick filaments past thin filaments is a highly regulated process that occurs in an ATP-dependent manner driving muscle contraction. In addition to myosin that makes up the backbone of the thick filament, four other proteins which are intimately bound to the thick filament, myosin binding protein-C, titin, myomesin, and obscurin play important structural and regulatory roles. Consistent with this, mutations in the respective genes have been associated with idiopathic and congenital forms of skeletal and cardiac myopathies. In this review, we aim to summarize our current knowledge on the molecular structure, subcellular localization, interacting partners, function, modulation via posttranslational modifications, and disease involvement of these five major proteins that comprise the thick filament of striated muscle cells. © 2018 American Physiological Society. Compr Physiol 8:631-709, 2018.

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