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Related Concept Videos

Channel Rhodopsins01:11

Channel Rhodopsins

Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory organs,...

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Related Experiment Video

Updated: May 30, 2026

Ex Vivo Optogenetic Interrogation of Long-Range Synaptic Transmission and Plasticity from Medial Prefrontal Cortex to Lateral Entorhinal Cortex
11:31

Ex Vivo Optogenetic Interrogation of Long-Range Synaptic Transmission and Plasticity from Medial Prefrontal Cortex to Lateral Entorhinal Cortex

Published on: February 25, 2022

Extending optogenetics to a Ca(2+)-selective channel.

Christoph Romanin1

  • 1Institute of Biophysics, University of Linz, A-4040 Linz, Austria. christoph.romanin@jku.at

Chemistry & Biology
|August 2, 2011
PubMed
Summary
This summary is machine-generated.

Researchers created a light-activated protein, LOVS1K, to control calcium (Ca2+) signals. This tool precisely regulates cellular calcium levels by interacting with the Orai channel, impacting cell signaling pathways.

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Area of Science:

  • Cellular Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Calcium (Ca2+) signaling is crucial for numerous cellular functions, including muscle contraction, neurotransmitter release, and gene expression.
  • Precise control over Ca2+ dynamics is essential for understanding and manipulating these processes.
  • Existing methods for modulating Ca2+ signals often lack spatial or temporal resolution.

Discussion:

  • Pham et al. introduce LOVS1K, a novel photo-activated protein designed to modulate Ca2+ signaling.
  • LOVS1K binds to the Ca2+-specific membrane channel Orai, enabling light-induced control over Ca2+ influx.
  • This system allows for the generation of localized or global Ca2+ signals with high temporal precision.

Key Insights:

  • Development of a photo-activatable protein (LOVS1K) for precise Ca2+ signal generation.
  • Demonstration of LOVS1K's ability to control Ca2+ flux through the Orai channel.
  • Establishment of a new tool for optogenetic control of cellular calcium dynamics.

Outlook:

  • LOVS1K offers a powerful new method for researchers to investigate Ca2+ signaling in various biological contexts.
  • Potential applications include studying neurological disorders, cardiac function, and immune responses.
  • Future development could involve engineering LOVS1K for enhanced sensitivity or broader channel specificity.