Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Constitutively active L-type Ca2+ channels.

Manuel F Navedo1, Gregory C Amberg, V Scott Votaw

  • 1Department of Physiology and Biophysics, University of Washington, Box 357290, Seattle, WA 98195, USA.

Proceedings of the National Academy of Sciences of the United States of America
|July 26, 2005
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Ca<sub>V</sub>1.2 dynamics in native male arterial myocytes.

The Journal of physiology·2026
Same author

Tirzepatide Regulates Pacemaker Function by Modulating cAMP and Calcium Dynamics in Human Sinoatrial Node Cells.

Circulation·2026
Same author

A Unifying Mechanism for Synaptic Amyloid β Toxicity β Adrenergic Potentiation of the Ca <sup>2+</sup> Channel CaV1.2 by Amyloid β.

bioRxiv : the preprint server for biology·2026
Same author

Context-Dependent Control: PKA Regulation of Vascular Ca<sub>V</sub>1.2 Requires S1928 not Rad Phosphorylation.

Arteriosclerosis, thrombosis, and vascular biology·2026
Same author

Arterial Endothelial Deletion of <i>Alk1</i> Causes Severe Nosebleed by Impairing Nasal Smooth Muscle Cells.

Circulation research·2026
Same author

Intracellular Mechanosensation in Intestinal Smooth Muscle: Piezo1 Complexes Amplify Signaling Beyond the Surface.

bioRxiv : the preprint server for biology·2026

Calcium influx via L-type calcium channels (LTCCs) is crucial for many cell functions. This study reveals LTCCs operate in functional clusters regulated by a PKC-dependent switch, not just individual protein gating.

Area of Science:

  • Physiology
  • Cell Biology
  • Biophysics

Background:

  • L-type calcium channels (LTCCs) mediate calcium influx vital for muscle contraction, neuronal memory, and gene expression.
  • Investigating the spatiotemporal organization of LTCCs has been challenging due to methodological limitations.

Purpose of the Study:

  • To investigate the functional organization and regulation of LTCCs with high spatiotemporal resolution.
  • To elucidate the gating mechanisms controlling LTCC activity in arterial myocytes.

Main Methods:

  • Evanescent field fluorescence microscopy was employed to achieve high temporal and spatial resolution.
  • Analysis of LTCC function and gating mechanisms at the single-channel and cluster level.

Main Results:

Related Experiment Videos

  • LTCCs function in organized clusters, rather than solely as individual proteins.
  • LTCC gating is regulated by a protein kinase C (PKC)-dependent switch mechanism, not just stochastic gating.
  • Resting intracellular calcium in arterial myocytes is primarily controlled by this PKC-dependent mechanism and rare voltage-dependent openings.

Conclusions:

  • LTCCs form functional clusters with a novel regulatory mechanism.
  • PKC-dependent regulation of LTCC clusters is key to controlling intracellular calcium levels in arterial myocytes.
  • Persistent LTCC-mediated calcium influx is a significant regulator of steady-state calcium signals.