Thick filament-associated protein located in the crossbridge region of vertebrate striated muscle a bands. In vitro it binds MHC, F-actin and native thin filaments, and modifies the activity of actin-activated myosin ATPase. It may modulate muscle contraction or may play a more structural role. Belongs to the immunoglobulin superfamily. MyBP family. Note: This description may include information from UniProtKB.
Protein type: Myosin binding protein
Cellular Component: sarcomere; striated muscle thick filament; cytosol; A band
Molecular Function: identical protein binding; ATPase activator activity; myosin binding; structural constituent of muscle; metal ion binding; titin binding; actin binding; myosin heavy chain binding
Biological Process: heart morphogenesis; regulation of heart rate; positive regulation of ATPase activity; regulation of muscle filament sliding; regulation of striated muscle contraction; ventricular cardiac muscle morphogenesis; sarcomere organization; cell adhesion; myosin filament assembly; cardiac muscle contraction; muscle filament sliding
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.