Muscle protein

Muscle protein refers to a broad class of proteins that constitute the structural and functional machinery of skeletal, cardiac, and smooth muscle tissues. These proteins are primarily categorized into contractile proteins like actin and myosin, regulatory proteins such as troponin and tropomyosin, and structural proteins including dystrophin and titin [1][2]. They interact within the sarcomere to facilitate muscle contraction and force generation through the sliding filament mechanism, while structural proteins maintain the fiber's integrity during mechanical stress [2][3]. Dysfunctions in these proteins, often due to genetic mutations or age-related degradation, are central to diseases such as Duchenne muscular dystrophy, hypertrophic cardiomyopathy, and sarcopenia [4][5]. Pharmacological targeting of muscle proteins includes the use of small-molecule modulators to enhance or inhibit contractile force, such as cardiac myosin activators for heart failure [6]. Additionally, genetic therapies like exon-skipping are employed to restore the expression of essential structural components like dystrophin in muscular dystrophy patients [7]. Biomarkers such as creatine kinase and troponins are frequently used to monitor muscle damage and the efficacy of these therapeutic interventions [8]. Safety concerns in this area often involve the risk of cardiotoxicity or unintended muscle weakness when modulating contractile proteins [9].

Other names

Muscle proteinsMyofibrillar proteinSarcomeric proteinContractile protein

Modulation of sarcomere contractility via myosin activation or inhibition, calcium sensitization of regulatory proteins, and restoration of structural protein expression through exon-skipping or gene therapy.