TNNT3 Antibody

Background:

The binding of Ca(2+) to the trimeric troponin complexinitiates the process of muscle contraction. Increased Ca(2+)concentrations produce a conformational change in the troponincomplex that is transmitted to tropomyosin dimers situated alongactin filaments. The altered conformation permits increasedinteraction between a myosin head and an actin filament which,ultimately, produces a muscle contraction. The troponin complex hasprotein subunits C, I, and T. Subunit C binds Ca(2+) and subunit Ibinds to actin and inhibits actin-myosin interaction. Subunit Tbinds the troponin complex to the tropomyosin complex and is alsorequired for Ca(2+)-mediated activation of actomyosin ATPaseactivity. There are 3 different troponin T genes that encodetissue-specific isoforms of subunit T for fast skeletal-, slowskeletal-, and cardiac-muscle. This gene encodes fast skeletaltroponin T protein; also known as troponin T type 3. Alternativesplicing results in multiple transcript variants encodingadditional distinct troponin T type 3 isoforms. A developmentallyregulated switch between fetal/neonatal and adult troponin T type 3isoforms occurs. Additional splice variants have been described buttheir biological validity has not been established. Mutations inthis gene may cause distal arthrogryposis multiplex congenita type2B (DA2B).