Population
Cells expressing L-type calcium channels
Design
Preclinical
Key result
Overexpression of mutant, Ca2+-insensitive calmodulin ablated Ca2+-dependent inactivation of L-type calcium channels, demonstrating that CaM is the actual Ca2+ sensor for inactivation.
Authors
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Provides foundational insight into Ca2+ channel gating; leaves open whether CaM modulation offers cardiovascular therapeutic targets.
Demonstrates that calmodulin is the actual Ca2+ sensor for Ca2+-dependent inactivation of L-type calcium channels, interacting with an IQ-like motif on the alpha1c subunit.
Peterson et al. (1999) studied L-type calcium channel inactivation. Overexpression of mutant, Ca2+-insensitive calmodulin (CaM) was evaluated on Ca2+-dependent inactivation of L-type calcium channels. Overexpression of mutant, Ca2+-insensitive calmodulin ablated Ca2+-dependent inactivation of L-type calcium channels, demonstrating that CaM is the actual Ca2+ sensor for inactivation.