8TYW
cryo-EM structure of GPR6-Gs-Nb35 complex
Summary for 8TYW
Entry DOI | 10.2210/pdb8tyw/pdb |
EMDB information | 41729 |
Descriptor | G-protein coupled receptor 6, Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1, Guanine nucleotide-binding protein G(s) subunit alpha isoforms short, ... (5 entities in total) |
Functional Keywords | gpr6, gs, nb, cryo-em, membrane protein |
Biological source | Homo sapiens (human) More |
Total number of polymer chains | 5 |
Total formula weight | 146506.89 |
Authors | Barekatain, M.,Johansson, L.C.,Lam, J.H.,Sadybekov, A.V.,Han, G.W.,Popov, P.,Russo, J.,Bliesath, J.,Brice, N.,Beresford, M.,Carlson, L.,Saikatendu, K.S.,Sun, H.,Murphy, S.,Monenschein, H.,Schiffer, H.H.,Lutomski, C.,Robinson, C.V.,Liu, J.,Hua, T.,Katritch, V.,Cherezov, V. (deposition date: 2023-08-26, release date: 2024-12-04, Last modification date: 2024-12-18) |
Primary citation | Barekatain, M.,Johansson, L.C.,Lam, J.H.,Chang, H.,Sadybekov, A.V.,Han, G.W.,Russo, J.,Bliesath, J.,Brice, N.L.,Carlton, M.B.L.,Saikatendu, K.S.,Sun, H.,Murphy, S.T.,Monenschein, H.,Schiffer, H.H.,Popov, P.,Lutomski, C.A.,Robinson, C.V.,Liu, Z.J.,Hua, T.,Katritch, V.,Cherezov, V. Structural insights into the high basal activity and inverse agonism of the orphan receptor GPR6 implicated in Parkinson's disease. Sci.Signal., 17:-, 2024 Cited by PubMed Abstract: GPR6 is an orphan G protein-coupled receptor with high constitutive activity found in D2-type dopamine receptor-expressing medium spiny neurons of the striatopallidal pathway, which is aberrantly hyperactivated in Parkinson's disease. Here, we solved crystal structures of GPR6 without the addition of a ligand (a pseudo-apo state) and in complex with two inverse agonists, including CVN424, which improved motor symptoms in patients with Parkinson's disease in clinical trials. In addition, we obtained a cryo-electron microscopy structure of the signaling complex between GPR6 and its cognate G heterotrimer. The pseudo-apo structure revealed a strong density in the orthosteric pocket of GPR6 corresponding to a lipid-like endogenous ligand. A combination of site-directed mutagenesis, native mass spectrometry, and computer modeling suggested potential mechanisms for high constitutive activity and inverse agonism in GPR6 and identified a series of lipids and ions bound to the receptor. The structures and results obtained in this study could guide the rational design of drugs that modulate GPR6 signaling. PubMed: 39626010DOI: 10.1126/scisignal.ado8741 PDB entries with the same primary citation |
Experimental method | ELECTRON MICROSCOPY (3.43 Å) |
Structure validation
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