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The myosin-binding protein C, cardiac-type is a protein that in humans is encoded by the MYBPC3 gene. [5] This isoform is expressed exclusively in heart muscle during human and mouse development, [6] and is distinct from those expressed in slow skeletal muscle and fast skeletal muscle ().
The cardiac myosin binding protein C mutation identified in Maine Coon cats has not been found in any other breed of cat with HCM, but more recently another myosin binding protein C mutation has been identified in Ragdoll cats with HCM. [79] [80] As in humans, feline HCM is not present at birth but develops over time. It has been identified for ...
Kayvanpour et al. performed 2016 a meta-analysis with the largest dataset available on genotype-phenotype associations in DCM and mutations in lamin (LMNA), phospholamban (PLN), RNA Binding Motif Protein 20 (RBM20), Cardiac Myosin Binding Protein C (MYBPC3), Myosin Heavy Chain 7 (MYH7), Cardiac Troponin T 2 (TNNT2), and Cardiac Troponin I (TNNI3).
This gene encodes a member of the myosin-binding protein C family. This family includes the fast-, slow- and cardiac-type isoforms, each of which is a myosin-associated protein found in the cross-bridge-bearing zone (C region) of A bands in striated muscle. The protein encoded by this locus is referred to as the fast-type isoform.
These calcium ions bind to a protein called troponin, which initiates the process of muscle contraction. [50] Calcium sensitizers function by binding to cardiac troponin C, thereby enhancing the sensitivity of heart muscle cells to naturally occurring calcium ions. [51]
When calcium becomes bound to specific sites in the N-domain of TnC, a series of protein structural changes occurs, [citation needed] such that tropomyosin is rolled away from myosin-binding sites on actin, allowing myosin to attach to the thin filament and produce force and shorten the sarcomere. [citation needed]