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-Structure paper
| Title | Structure of the class C orphan GPCR GPR158 in complex with RGS7-Gβ5. |
|---|---|
| Journal, issue, pages | Nat Commun, Vol. 12, Issue 1, Page 6805, Year 2021 |
| Publish date | Nov 23, 2021 |
Authors | Eunyoung Jeong / Yoojoong Kim / Jihong Jeong / Yunje Cho / ![]() |
| PubMed Abstract | GPR158, a class C orphan GPCR, functions in cognition, stress-induced mood control, and synaptic development. Among class C GPCRs, GPR158 is unique as it lacks a Venus flytrap-fold ligand-binding ...GPR158, a class C orphan GPCR, functions in cognition, stress-induced mood control, and synaptic development. Among class C GPCRs, GPR158 is unique as it lacks a Venus flytrap-fold ligand-binding domain and terminates Gαi/o protein signaling through the RGS7-Gβ5 heterodimer. Here, we report the cryo-EM structures of GPR158 alone and in complex with one or two RGS7-Gβ5 heterodimers. GPR158 dimerizes through Per-Arnt-Sim-fold extracellular and transmembrane (TM) domains connected by an epidermal growth factor-like linker. The TM domain (TMD) reflects both inactive and active states of other class C GPCRs: a compact intracellular TMD, conformations of the two intracellular loops (ICLs) and the TMD interface formed by TM4/5. The ICL2, ICL3, TM3, and first helix of the cytoplasmic coiled-coil provide a platform for the DHEX domain of one RGS7 and the second helix recruits another RGS7. The unique features of the RGS7-binding site underlie the selectivity of GPR158 for RGS7. |
External links | Nat Commun / PubMed:34815401 / PubMed Central |
| Methods | EM (single particle) |
| Resolution | 3.52 - 4.7 Å |
| Structure data | EMDB-31351: apo GPR158 EMDB-31360, PDB-7ewp: EMDB-31363, PDB-7ewr: ![]() EMDB-31365: ![]() EMDB-31366: |
| Source |
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Keywords | SIGNALING PROTEIN / Class C orphan GPCR / depression / neuronal signaling / PAS-folded GPCR / noncanonical signaling GPCR / GPCR |
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