Abstract
GABAB receptors (GBRs), the G protein-coupled receptors for the inhibitory neurotransmitter γ-aminobutyric acid (GABA), activate Go/i-type G proteins that regulate adenylyl cyclase, Ca2+ channels, and K+ channels. GBR signaling to enzymes and ion channels influences neuronal activity, plasticity processes, and network activity throughout the brain. GBRs are obligatory heterodimers composed of GB1a or GB1b subunits with a GB2 subunit. Heterodimeric GB1a/2 and GB1b/2 receptors represent functional units that associate in a modular fashion with regulatory, trafficking, and effector proteins to generate receptors with distinct physiological functions. This review summarizes current knowledge on the structure, organization, and functions of multi-protein GBR complexes.
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Acknowledgments
We thank M. Gassmann for helpful discussions. This work was supported by grants of the Swiss Science Foundation (31003A-172881) and the National Center for Competences in Research (NCCR) “Synapsy, Synaptic Basis of Mental Health Disease” (to B.B).
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Fritzius, T., Stawarski, M., Isogai, S., Bettler, B. (2020). Structural Basis of GABAB Receptor Regulation and Signaling. In: Vlachou, S., Wickman, K. (eds) Behavioral Neurobiology of GABAB Receptor Function. Current Topics in Behavioral Neurosciences, vol 52. Springer, Cham. https://doi.org/10.1007/7854_2020_147
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