Disease:Defects in TNNI3 are the cause of cardiomyopathy dilated type 2A (CMD2A) [MIM:611880]. Dilated cardiomyopathy is a disorder characterized by ventricular dilation and impaired systolic function , resulting in congestive heart failure and arrhythmia. Patients are at risk of premature death. ,Disease:Defects in TNNI3 are the cause of cardiomyopathy familial hypertrophic type 7 (CMH7) [MIM:191044]. Familial hypertrophic cardiomyopathy is a hereditary heart disorder characterized by ventricular hypertrophy , which is usually asymmetric and often involves the interventricular septum. The symptoms include dyspnea , syncope , collapse , palpitations , and chest pain. They can be readily provoked by exercise. The disorder has inter- and intrafamilial variability ranging from benign to malignant forms with high risk of cardiac failure and sudden cardiac death. ,Disease:Defects in TNNI3 are the cause of cardiomyopathy familial restrictive type 1 (RCM1) [MIM:115210]. RCM1 is an heart muscle disorder characterized by impaired filling of the ventricles with reduced diastolic volume , in the presence of normal or near normal wall thickness and systolic function. ,Function:Troponin I is the inhibitory subunit of troponin , the thin filament regulatory complex which confers calcium-sensitivity to striated muscle actomyosin ATPase activity. ,similarity:Belongs to the troponin I family. ,subunit:Binds to actin and tropomyosin. Interacts with TRIM63. ,
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