Reactome: A Curated Pathway Database

Calcium Binds Troponin-C (R-HSA-390595)

Species Homo sapiens


At the start of the cycle a myosin head lacking a bound nucleotide is locked tightly onto an actin filament in a rigor conformation. Troponin-C has bound four calcium ions. In an actively contracting muscle this state is very short-lived, being rapidly terminated by the binding of a molecule of ATP.

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Additional Information
Compartment cytosol
Literature References
pubMedId Title Journal Year
10747208 Regulation of contraction in striated muscle Physiol Rev 2000
Regulatory Mechanisms of Striated Muscle Contraction Advances in Experimental Medicine and Biology 2007