Structure of a human synaptic GABA(A) receptor

Article

关键词: AMINOBUTYRIC ACID(A) RECEPTOR;    BENZODIAZEPINE BINDING-SITE;    GAMMA-SUBUNIT;    BETA-SUBUNIT;    A RECEPTORS;    AGONIST;    MODULATION;    PHARMACOLOGY;    INSIGHTS;    AFFINITY;   

DOI  :  10.1038/s41586-018-0255-3

来源: SCIE

【 摘 要 】

Fast inhibitory neurotransmission in the brain is principally mediated by the neurotransmitter GABA (gamma-aminobutyric acid) and its synaptic target, the type A GABA receptor (GABA(A) receptor). Dysfunction of this receptor results in neurological disorders and mental illnesses including epilepsy, anxiety and insomnia. The GABA(A) receptor is also a prolific target for therapeutic, illicit and recreational drugs, including benzodiazepines, barbiturates, anaesthetics and ethanol. Here we present high-resolution cryo-electron microscopy structures of the human alpha 1 beta 2 gamma 2 GABA(A) receptor, the predominant isoform in the adult brain, in complex with GABA and the benzodiazepine site antagonist flumazenil, the first-line clinical treatment for benzodiazepine overdose. The receptor architecture reveals unique heteromeric interactions for this important class of inhibitory neurotransmitter receptor. This work provides a template for understanding receptor modulation by GABA and benzodiazepines, and will assist rational approaches to therapeutic targeting of this receptor for neurological disorders and mental illness.

【 授权许可】

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