9VO2: OXGR1(CA)-Gq complex

Cryo-EM structure of the OXGR1(CA)-Gq complex. Determined by electron microscopy at 2.7 Å resolution. Released 18 Mar 2026.

Method: Electron microscopy
Resolution: 2.7 Å
Organisms: Homo sapiens, synthetic construct
Chains: 5
Atoms: 8,589
Mol. weight: 155.12 kDa
Released: 18 Mar 2026

Explore 9VO2 in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

9VO2 contains 36 α-helices and 62 β-strands across 5 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 9 helices, 6 β-strands

Element	Residues	Length	Sheet
α-helix	7-32	26
β-strand	33-40	8	1
α-helix	46-56	11
β-strand	184-191	8	1
β-strand	194-201	8	1
α-helix	212-215	4
β-strand	220-226	7	1
α-helix	233-244	12
β-strand	253-259	7	1
α-helix	261-269	9
α-helix	285-286	2
α-helix	291-292	2
α-helix	297-316	20
β-strand	324-328	5	1
α-helix	336-355	20

Chain B: 3 helices, 28 β-strands

Element	Residues	Length	Sheet
α-helix	6-25	20
α-helix	30-33	4
β-strand	47-52	6	2
β-strand	58-63	6	3
β-strand	69-74	6	3
β-strand	78-83	6	3
β-strand	88-94	7	3
β-strand	100-105	6	4
β-strand	111-116	6	4
β-strand	121-125	5	4
β-strand	134-139	6	4
β-strand	146-151	6	5
β-strand	156-161	6	5
β-strand	165-170	6	5
β-strand	175-181	7	5
β-strand	187-192	6	6
β-strand	198-203	6	6
β-strand	208-212	5	6
β-strand	218-222	5	6
β-strand	229-234	6	7
β-strand	240-245	6	7
β-strand	250-254	5	7
β-strand	259-264	6	7
α-helix	272	1
β-strand	273-278	6	8
β-strand	284-289	6	8
β-strand	294-298	5	8
β-strand	303-307	5	8
β-strand	315-320	6	2
β-strand	327-331	5	2
β-strand	335-339	5	2

Chain G: 4 helices, 0 β-strands

Element	Residues	Length
α-helix	12-23	12
α-helix	30-44	15
α-helix	45-47	3
α-helix	54-55	2

Chain R: 16 helices, 2 β-strands

Element	Residues	Length	Sheet
α-helix	29-30	2
α-helix	31-35	5
α-helix	36-61	26
α-helix	67-94	28
α-helix	102-136	35
α-helix	143-145	3
α-helix	147-165	19
α-helix	167-171	5
β-strand	174	1	9
β-strand	183	1	9
α-helix	192-203	12
α-helix	204-208	5
α-helix	209-226	18
α-helix	234-269	36
α-helix	274-292	19
α-helix	294-298	5
α-helix	299-304	6
α-helix	307-319	13

Chain S: 4 helices, 26 β-strands

Element	Residues	Length	Sheet
β-strand	3-7	5	10
β-strand	11-12	2	11
β-strand	17-25	9	10
α-helix	29-31	3
β-strand	33-39	7	12
β-strand	45-51	7	12
α-helix	53-55	3
β-strand	58-60	3	12
β-strand	65	1	10
β-strand	68-73	6	10
β-strand	78-84	7	10
β-strand	92-99	8	12
β-strand	110-111	2	12
β-strand	115-117	3	12
β-strand	118-119	2	11
β-strand	128-129	2	13
β-strand	134-136	3	14
β-strand	143-149	7	13
β-strand	154	1	15
β-strand	160	1	15
β-strand	162-167	6	14
β-strand	174-178	5	14
β-strand	182-183	2	14
α-helix	184	1
β-strand	191-196	6	13
β-strand	199-204	6	13
β-strand	213-219	7	14
α-helix	225	1
β-strand	227	1	14
β-strand	231-234	4	14

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Guanine nucleotide-binding protein G(q) subunit alpha isoforms short	A	protein	370	Homo sapiens
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	B	protein	338	Homo sapiens	P62873 (AlphaFold model)
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2	G	protein	59	Homo sapiens	P59768 (AlphaFold model)
2-oxoglutarate receptor 1	R	protein	337	Homo sapiens	Q96P68 (AlphaFold model)
scFv16	S	protein	285	synthetic construct

Sequence of entity 1 (A), FASTA

>9VO2_1 Guanine nucleotide-binding protein G(q) subunit alpha isoforms short (chains A)
MMGCTLSAEDKAAVERSKMIEKQLQKDKQVYRRTLRLLLLGADNSGKSTIVKQMRIYHVN
GYSEEECKQYKAVVYSNTIQSIIAIIRAMGRLKIDFGDSARADDARQLSVLAGAAEEGFM
TAELAGVIKRLWKDSGVQACFNRSREYQLNDSAAYYLNDLDRIAQPNYIPTQQDVLRTRV
KTSGIFETKFQVDKVNFHMFDVGAQRDERRKWIQCFNDVTAIIFVVDSSDYNRLQEALND
FKSIWNNRWLRTISVILFLNKQDLLAEKVLKSKIEDYFPEFARYTTPEDATPEPGEDPRV
TRAKYFIRKEFVDISTASGDGRHICYPHFTCSVDTENARRIFNDCKDIILQMNLREYNLV
MNAIVVVNLF

Sequence of entity 2 (B), FASTA

>9VO2_2 Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 (chains B)
ELDQLRQEAEQLKNQIRDARKACADATLSQITNNIDPVGRIQMRTRRTLRGHLAKIYAMH
WGTDSRLLVSASQDGKLIIWDSYTTNKVHAIPLRSSWVMTCAYAPSGNYVACGGLDNICS
IYNLKTREGNVRVSRELAGHTGYLSCCRFLDDNQIVTSSGDTTCALWDIETGQQTTTFTG
HTGDVMSLSLAPDTRLFVSGACDASAKLWDVREGMCRQTFTGHESDINAICFFPNGNAFA
TGSDDATCRLFDLRADQELMTYSHDNIICGITSVSFSKSGRLLLAGYDDFNCNVWDALKA
DRAGVLAGHDNRVSCLGVTDDGMAVATGSWDSFLKIWN

Sequence of entity 3 (G), FASTA

>9VO2_3 Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 (chains G)
NTASIAQARKLVEQLKMEANIDRIKVSKAAADLMAYCEAHAKEDPLLTPVPASENPFRE

Sequence of entity 4 (R), FASTA

>9VO2_4 2-oxoglutarate receptor 1 (chains R)
MNEPLDYLANASDFPDYAAAFGNCTDENIPLKMHYLPVIYGIIFLVGFPGNAVVISTYIF
KMRPWKSSTIIMLNLACTDLLYLTSLPFLIHYYASGENWIFGDFMCKFIRFSFHFNLYSS
ILFLTCFSIFRYCVIIHPMSCFSIHKTRCAVVACAVVWIISLVAVIPMTFLITSTNRTNR
SACLDLTSSDELNTIKWYNLILTATTFCLPLVIVTLCYTTIIHTLTHGLQTDSCLKQKAR
RLTILLLLAFYVCFLPFHILRVIRIESRLLSISCSIENQIHEAYIVSRPLAALNTFGNLL
LYVVVSDNFQQAVCSTVRCKVSGNLEQAKKISYSNNP

Sequence of entity 5 (S), FASTA

>9VO2_5 scFv16 (chains S)
MLLVNQSHQGFNKEHTSKMVSAIVLYVLLAAAAHSAFAVQLVESGGGLVQPGGSRKLSCS
ASGFAFSSFGMHWVRQAPEKGLEWVAYISSGSGTIYYADTVKGRFTISRDDPKNTLFLQM
TSLRSEDTAMYYCVRSIYYYGSSPFDFWGQGTTLTVSAGGGGSGGGGSGGGGSADIVMTQ
ATSSVPVTPGESVSISCRSSKSLLHSNGNTYLYWFLQRPGQSPQLLIYRMSNLASGVPDR
FSGSGSGTAFTLTISRLEAEDVGVYYCMQHLEYPLTFGAGTKLEL

Primary citation

Metabolite-gated vascular contractility switch: OXGR1 activation mechanism enables agonist therapy for rosacea erythema. Xiao, W., Zhu, Y., Tang, X. et al. Cell (2026) 189:1990-2006.e30. DOI 10.1016/j.cell.2026.01.036 · PubMed

Other PDB entries of the same protein (UniProt P62873 (AlphaFold model), which also has an AlphaFold model), best resolution first:

8QEH 1.43 Å, Crystal structure of the G11 protein heterotrimer bound to FR900359 inhibitor
8QEG 1.7 Å, Crystal structure of the G11 protein heterotrimer bound to YM-254890 inhibitor
8F0K 1.9 Å, Human Amylin3 Receptor in complex with Gs and Pramlintide analogue peptide San385
9YDQ 1.94 Å, Human delta opioid receptor complex with mini-Gi and agonist DADLE and allosteric…
9YDP 1.95 Å, Human delta opioid receptor complex with mini-Gi and agonist DADLE
6CRK 2.0 Å, Heterotrimeric G-protein in complex with an antibody fragment
8F0J 2.0 Å, Calcitonin Receptor in complex with Gs and Pramlintide analogue peptide San45
8F2B 2.0 Å, Amylin 3 Receptor in complex with Gs and Pramlintide analogue peptide San45
9XXT 2.0 Å, Cryo-EM structure of lysophosphatidylserine (18:0)-bound GPR174-Gs complex
6X18 2.1 Å, GLP-1 peptide hormone bound to Glucagon-Like peptide-1 (GLP-1) Receptor
6X19 2.1 Å, Non peptide agonist CHU-128, bound to Glucagon-Like peptide-1 (GLP-1) Receptor
9NTU 2.1 Å, Cryo-EM structure of BETP-GLP-1(9-36)-GLP-1R-Gs complex

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