Ligand Gated
Ligand Gated - Related Videos
01:19
Ligand-gated Ion Channels
0 Views •
2024
Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site. Three Subfamilies of Ligand-gated Ion Channels Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that include the...
01:19
Ligand-gated Ion Channels
0 Views •
2023
Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site. Three Subfamilies of Ligand-gated Ion Channels Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that include the...
01:30
Ligand-Gated Ion Channel Receptor: Gating Mechanism
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2023
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
11:19
Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels
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Cited by 7 •
2016
This article describes methods for site-directed spin labeling and reconstitution of pentameric ligand-gated channels for Electron Paramagnetic Resonance studies. This protocol can be adapted for any membrane protein. The reconstitution method described here can also be used for patch-clamp measurements of macroscopic and single-channel currents in a defined lipid system.
16:36
Proteomics to Identify Proteins Interacting with P2X2 Ligand-Gated Cation Channels
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Cited by 13 •
2009
We describe a simple protocol to identify brain proteins that bind to the full length C terminus of ATP-gated P2X2 receptors. The extension and systematic application of this approach to all P2X receptors is expected to lead to a better understanding of P2X receptor signaling.
FAQs
Ligand binding triggers a conformational change in the membrane protein. That structural rearrangement alters the channel’s ion permeability, allowing charged particles to cross the membrane differently than they did before binding. The resulting movement of ions converts recognition of a chemical messenger into an electrical response, linking molecular signaling at the membrane to activity in the cell.
Sodium, potassium, calcium, and chloride can all participate in the electrical effects produced by these channels. Changing permeability to one or more of these charged particles changes how ions move across the membrane and therefore influences the resulting electrical response. The particular ions involved help determine how chemical communication affects an excitable cell.
A channel responds when its specific chemical messenger binds to it, so ligand recognition determines which signals can influence that channel. This selectivity helps cells distinguish among chemical messages rather than responding indiscriminately to every nearby molecule. As a result, ligand binding provides a controlled link between a particular signal and a particular electrical change.
At synapses, chemical messengers can act on these channels to produce electrical responses in the receiving cell. Because ligand binding directly changes membrane ion permeability, the process connects chemical communication with electrical activity at the cell surface. This mechanism makes ligand-gated signaling especially important for communication between excitable cells and for transmitting information across neural connections.
Researchers can focus on their structure and function to understand how ligand recognition, conformational change, and ion permeability are connected. Examining these features clarifies how chemical signals produce electrical responses in cells. This structural and functional perspective also supports research into neurological disorders and helps identify receptor activity as a target for further investigation.
Their role in synaptic transmission, sensory signaling, and communication between excitable cells makes ligand-gated ion channels relevant to neurological research. Drugs can be designed or studied for their ability to modify receptor activity, potentially changing how channels respond to chemical messengers. Such work connects channel biology with investigations of neurological disorders and therapeutic strategies.