Key result
X-ray crystallography of human cardiac troponin revealed that Ca2+ binding to the regulatory TnC site displaces the carboxyl-terminal portion of TnI from actin/tropomyosin, altering mobility.
The determination of the crystal structure of human cardiac troponin provides key mechanistic insights into how calcium binding regulates muscle contraction via structural changes in the thin filament.
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Structural insights into troponin regulation may inform Ca2+-sensitizing therapies; leaves open validation in disease models.
Soichi Takeda (2005) studied Muscle regulation. X-ray crystallography was evaluated on Molecular structure of human cardiac troponin core domains. X-ray crystallography of human cardiac troponin revealed that Ca2+ binding to the regulatory TnC site displaces the carboxyl-terminal portion of TnI from actin/tropomyosin, altering mobility.
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