9VMN: A-KG-OXGR1-Gq complex

Cryo-EM structure of the a-KG-OXGR1-Gq complex. Determined by electron microscopy at 2.6 Å resolution. Released 18 Mar 2026.

Method: Electron microscopy
Resolution: 2.6 Å
Organisms: Homo sapiens, synthetic construct
Chains: 5
Atoms: 8,705
Mol. weight: 144.29 kDa
Ligands: AKG
Released: 18 Mar 2026

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

Secondary structure: helices and β-sheets

9VMN contains 37 α-helices and 61 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	46-55	10
β-strand	184-191	8	1
β-strand	194-201	8	1
α-helix	211-215	5
β-strand	220-226	7	1
α-helix	233-244	12
β-strand	253-259	7	1
α-helix	261-267	7
α-helix	273-276	4
α-helix	278-280	3
α-helix	297-315	19
β-strand	324-328	5	1
α-helix	337-355	19

Chain B: 3 helices, 28 β-strands

Element	Residues	Length	Sheet
α-helix	4-24	21
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	120-125	6	4
β-strand	134-140	7	4
β-strand	146-151	6	5
β-strand	156-161	6	5
β-strand	166-170	5	5
β-strand	175-180	6	5
β-strand	187-192	6	6
β-strand	198-203	6	6
β-strand	207-212	6	6
β-strand	218-223	6	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	304-308	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	30-43	14
α-helix	45-47	3
α-helix	53-55	3

Chain R: 17 helices, 2 β-strands

Element	Residues	Length	Sheet
α-helix	29-61	33
α-helix	67-84	18
α-helix	86-94	9
α-helix	104-136	33
α-helix	143-145	3
α-helix	147-165	19
α-helix	166-168	3
β-strand	174-175	2	9
β-strand	182-183	2	9
α-helix	186-188	3
α-helix	192-203	12
α-helix	204-208	5
α-helix	209-226	18
α-helix	234-253	20
α-helix	255-269	15
α-helix	274-292	19
α-helix	294-297	4
α-helix	298-304	7
α-helix	307-319	13

Chain S: 4 helices, 25 β-strands

Element	Residues	Length	Sheet
β-strand	3-7	5	10
β-strand	10-12	3	11
β-strand	17-25	9	10
α-helix	29-31	3
β-strand	33-39	7	11
β-strand	45-51	7	11
β-strand	58-60	3	11
β-strand	65	1	10
β-strand	68-73	6	10
β-strand	78-84	7	10
α-helix	88-90	3
β-strand	92-99	8	11
β-strand	110-111	2	11
β-strand	115-119	5	11
β-strand	128-129	2	12
β-strand	134-136	3	13
β-strand	143-149	7	12
β-strand	154	1	14
β-strand	160	1	14
β-strand	162-167	6	13
β-strand	174-178	5	13
β-strand	182-183	2	13
α-helix	184	1
β-strand	191-196	6	12
β-strand	199-204	6	12
β-strand	213-219	7	13
α-helix	225	1
β-strand	227	1	13
β-strand	231-234	4	13

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Guanine nucleotide-binding protein G(q) subunit alpha isoforms short	A	protein	356	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	51	Homo sapiens	P59768 (AlphaFold model)
2-oxoglutarate receptor 1	R	protein	295	Homo sapiens	Q96P68 (AlphaFold model)
scFv16	S	protein	247	synthetic construct

Sequence of entity 1 (A), FASTA

>9VMN_1 Guanine nucleotide-binding protein G(q) subunit alpha isoforms short (chains A)
TLSAEDKAAVERSKMIEKQLQKDKQVYRRTLRLLLLGADNSGKSTIVKQMRIYHVNGYSE
EECKQYKAVVYSNTIQSIIAIIRAMGRLKIDFGDSARADDARQLSVLAGAAEEGFMTAEL
AGVIKRLWKDSGVQACFNRSREYQLNDSAAYYLNDLDRIAQPNYIPTQQDVLRTRVKTSG
IFETKFQVDKVNFHMFDVGAQRDERRKWIQCFNDVTAIIFVVDSSDYNRLQEALNDFKSI
WNNRWLRTISVILFLNKQDLLAEKVLKSKIEDYFPEFARYTTPEDATPEPGEDPRVTRAK
YFIRKEFVDISTASGDGRHICYPHFTCSVDTENARRIFNDCKDIILQMNLREYNLV

Sequence of entity 2 (B), FASTA

>9VMN_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

>9VMN_3 Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 (chains G)
QARKLVEQLKMEANIDRIKVSKAAADLMAYCEAHAKEDPLLTPVPASENPF

Sequence of entity 4 (R), FASTA

>9VMN_4 2-oxoglutarate receptor 1 (chains R)
DENIPLKMHYLPVIYGIIFLVGFPGNAVVISTYIFKMRPWKSSTIIMLNLACTDLLYLTS
LPFLIHYYASGENWIFGDFMCKFIRFSFHFNLYSSILFLTCFSIFRYCVIIHPMSCFSIH
KTRCAVVACAVVWIISLVAVIPMTFLITSTNRTNRSACLDLTSSDELNTIKWYNLILTAT
TFCLPLVIVTLCYTTIIHTLTHGLQTDSCLKQKARRLTILLLLAFYVCFLPFHILRVIRI
ESRLLSISCSIENQIHEAYIVSRPLAALNTFGNLLLYVVVSDNFQQAVCSTVRCK

Sequence of entity 5 (S), FASTA

>9VMN_5 scFv16 (chains S)
VQLVESGGGLVQPGGSRKLSCSASGFAFSSFGMHWVRQAPEKGLEWVAYISSGSGTIYYA
DTVKGRFTISRDDPKNTLFLQMTSLRSEDTAMYYCVRSIYYYGSSPFDFWGQGTTLTVSA
GGGGSGGGGSGGGGSADIVMTQATSSVPVTPGESVSISCRSSKSLLHSNGNTYLYWFLQR
PGQSPQLLIYRMSNLASGVPDRFSGSGSGTAFTLTISRLEAEDVGVYYCMQHLEYPLTFG
AGTKLEL

Ligands and cofactors

ID	Name	Formula	Copies
AKG	2-oxoglutaric acid	C5 H6 O5	1

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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