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Updated: Jul 26, 2026

Using an α-Bungarotoxin Binding Site Tag to Study GABA A Receptor Membrane Localization and Trafficking
Published on: March 28, 2014
GABA(B) receptors function as heterodimers
F H Marshall1, J White, M Main
1Molecular Pharmacology Unit, GlaxoWellcome Medicines Research Centre, Stevenage, Hertfordshire, UK.
Abstract:
Our current understanding is that functional GABA(B) receptors exist as heterodimers of two related seven-transmembrane proteins, GABA(B)-R1 and GABA(B)-R2. GABA(B)-R1 requires GABA(B)-R2 to be expressed at the cell surface as a mature glycoprotein. Cloning of the GABA(B) receptor has failed to provide molecular evidence to support the existence of true receptor subtypes. The discovery of the heterodimeric nature of the GABA(B) receptor has already changed the way we think about GPCR function and it is likely that future studies will change our understanding about how receptor subtypes can be formed.
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