Cys-loop Receptors
Cys-loop Receptors - Related Videos
17:15
Catheterization of Intestinal Loops in Ruminants
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Cited by 4 •
2009
We describe a novel surgical method for catheterizing 'intestinal loops' within the ileum of sheep. Once animals have recovered from surgery and have cleared antibiotics and analgesics, multiple treatments can be deposited directly in loops via the catheters.
08:15
Cardiac Pressure-Volume Loop Analysis Using Conductance Catheters in Mice
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Cited by 33 •
2015
Cardiac pressure-volume loop analysis is the most comprehensive way to measure cardiac function in the intact heart. We describe a technique to perform and analyze cardiac pressure volume loops, using conductance catheters.
09:15
Measuring Pressure Volume Loops in the Mouse
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Cited by 16 •
2016
This manuscript describes a detailed protocol for the collection of pressure-volume data from the mouse.
01:01
Feedback Loops
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2025
In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone. Blood-sugar Levels For example, an increase in blood glucose levels releases the hormone insulin from beta cells of the pancreas into the bloodstream, delivering insulin to cells throughout the body.
11:27
Studying DNA Looping by Single-Molecule FRET
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Cited by 13 •
2014
This study presents a detailed experimental procedure to measure looping dynamics of double-stranded DNA using single-molecule Fluorescence Resonance Energy Transfer (FRET). The protocol also describes how to extract the looping probability density called the J factor.
FAQs
Ligand binding initiates a sequence of linked structural events. An extracellular neurotransmitter-binding event produces conformational changes that propagate through the receptor and open its ion-conducting pore. Ion movement then changes the cell membrane potential, allowing a chemical signal to become a rapid electrical response. This sequence explains how these receptors support fast neuronal communication.
The conserved cysteine pair forms a disulfide-linked loop in the receptor’s extracellular region. This loop provides a characteristic structural feature shared by the receptor family and helps distinguish these channels from other ligand-gated ion channels. Recognizing this motif allows researchers to relate receptor architecture to the broader Cys-loop family while studying its diverse members.
Their signaling effect depends on how receptor activation changes the membrane potential of the responding cell. Some family members support excitatory signaling, whereas others mediate inhibitory signaling. Thus, the same general mechanism, chemical binding followed by pore opening, can contribute to different neural outcomes depending on the receptor involved and its role in synaptic transmission.
Nicotinic acetylcholine, GABA_A, glycine, and 5-HT3 receptors belong to the same structural family but respond to different neurotransmitter systems. Their inclusion in one group reflects shared pentameric channel architecture and the characteristic cysteine-containing loop, while their distinct ligand sensitivities and signaling roles help explain their separate contributions to nervous-system function.
The sensitivity of these receptors to drugs, anesthetics, and toxins makes them useful experimental targets. Such agents can reveal how receptor activity is altered and help connect channel behavior with changes in neuronal signaling. This pharmacological sensitivity also provides a basis for investigating receptor function in the context of brain activity and neurological disease.
Because these receptors participate in synaptic transmission, examining their ligand responses and effects on membrane potential can clarify how neurons communicate. Comparing their excitatory and inhibitory roles also helps frame changes in neural signaling associated with disease. Their responsiveness to pharmacological and toxic agents further supports their use as targets in neurological research.