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Target intelligence / Profile preview
Gamma-aminobutyric Acid (GABA) Receptor Benzodiazepine Binding Site (BZR)
- Target
- BZR
- Molecular classification
- Receptor, Ligand-gated ion channel subunit interface, Allosteric binding site
01
Overview
The gamma-aminobutyric acid receptor benzodiazepine binding site refers specifically to an allosteric modulatory pocket formed at certain interfaces within heteropentameric GABAA receptors. It underlies both therapeutic actions and side effects associated with drugs like diazepam through potentiation—not direct activation—of inhibitory neurotransmission in CNS neurons. The classical binding site is located at the interface between an α subunit (specifically α1, α2, α3, or α5) and a γ2 subunit in receptors that also contain β subunits. Benzodiazepines act as positive allosteric modulators, enhancing the effect of endogenous GABA by increasing chloride ion influx through the channel when activated by GABA. This leads to hyperpolarization of neurons and decreased neuronal excitability.
- Other names
- Benzodiazepine siteBZ receptorOmega receptor (outdated)
02
Mechanism of action
Positive allosteric modulation of GABAA receptor activity
03
Biological functions
Modulation of GABAergic neurotransmissionRegulation of neuronal excitability
04
Disease associations
Anxiety disordersInsomniaSeizure disordersMuscle spasticity
05
Safety considerations
SedationRespiratory depressionDependenceWithdrawal symptomsCognitive impairment
06
Interacting drugs
Benzodiazepines (e.g., Diazepam)
2 more in the full profile.
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