8YG4: PDB entry 8YG4

A cryo-EM structure of LA-PTH-R1-PTH1R-Gs complex structure. Determined by electron microscopy at 2.59 Å resolution. Released 3 Sept 2025.

Method: Electron microscopy
Resolution: 2.59 Å
Organisms: Bos taurus, Rattus norvegicus, Lama glama
Chains: 6
Atoms: 8,620
Mol. weight: 162.02 kDa
Released: 3 Sept 2025

Explore 8YG4 in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

8YG4 contains 36 α-helices and 47 β-strands across 6 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, 7 β-strands

Element	Residues	Length	Sheet
α-helix	7-32	26
β-strand	34-40	7	1
α-helix	46-56	11
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	254-259	6	1
α-helix	261-270	10
α-helix	275-278	4
α-helix	280-282	3
α-helix	299-318	20
β-strand	326	1	1
β-strand	329-330	2	1
α-helix	337-357	21

Chain B: 5 helices, 29 β-strands

Element	Residues	Length	Sheet
α-helix	4-25	22
α-helix	30-33	4
α-helix	34-36	3
α-helix	38-39	2
β-strand	43	1	2
β-strand	45-51	7	3
β-strand	58-63	6	4
β-strand	69-74	6	4
β-strand	78-83	6	4
β-strand	89-94	6	4
β-strand	100-105	6	5
β-strand	111-116	6	5
β-strand	121-125	5	5
β-strand	135-139	5	5
β-strand	146-151	6	6
β-strand	156-161	6	6
β-strand	165-170	6	6
β-strand	175-181	7	6
α-helix	186	1
β-strand	187-192	6	7
β-strand	198-203	6	7
β-strand	208-212	5	7
β-strand	218-222	5	7
β-strand	229-234	6	8
β-strand	240-245	6	8
β-strand	249-254	6	8
β-strand	260-265	6	8
β-strand	273-278	6	2
β-strand	284-289	6	2
β-strand	294-298	5	2
β-strand	304-308	5	2
β-strand	315-320	6	3
β-strand	327-331	5	3
β-strand	336-341	6	3

Chain G: 4 helices, 0 β-strands

Element	Residues	Length
α-helix	8-23	16
α-helix	30-43	14
α-helix	45-47	3
α-helix	53-55	3

Chain N: 2 helices, 11 β-strands

Element	Residues	Length	Sheet
β-strand	3-7	5	9
β-strand	10-12	3	10
β-strand	17-25	9	9
α-helix	29-31	3
β-strand	34-39	6	10
β-strand	45-51	7	10
β-strand	58-60	3	10
β-strand	68-73	6	9
β-strand	78-84	7	9
α-helix	88-90	3
β-strand	92-98	7	10
β-strand	118	1	10
β-strand	122-126	5	10

Chain P: 1 helix, 0 β-strands

Element	Residues	Length	Sheet
α-helix	3-31	29

Chain R: 15 helices, 0 β-strands

Element	Residues	Length
α-helix	35-45	11
α-helix	179-211	33
α-helix	218-244	27
α-helix	279-307	29
α-helix	308-312	5
α-helix	320-325	6
α-helix	326-330	5
α-helix	331-345	15
α-helix	361-390	30
α-helix	400-411	12
α-helix	413-417	5
α-helix	421-424	4
α-helix	435-456	22
α-helix	457-461	5
α-helix	464-480	17

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Guanine nucleotide-binding protein G(s) subunit alpha-1	A	protein	361	Bos taurus
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	B	protein	354	Rattus norvegicus	P62873 (AlphaFold model)
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2	G	protein	71	Bos taurus	P59768 (AlphaFold model)
NB35	N	protein	140	Lama glama
La-pth-R1	P	protein	32	synthetic construct
Parathyroid hormone/parathyroid hormone-related peptide receptor	R	protein	476	Homo sapiens	Q03431 (AlphaFold model)

Sequence of entity 1 (A), FASTA

>8YG4_1 Guanine nucleotide-binding protein G(s) subunit alpha-1 (chains A)
MGCTLSAEDKAAVERSKMIEKQLQKDKQVYRATHRLLLLGADNSGKSTIVKQMRIYHVNG
YSEEECKQYKAVVYSNTIQSIIAIIRAMGRLKIDFGDSARADDARQLFVLAGAAEEGFMT
AELAGVIKRLWKDSGVQACFNRSREYQLNDSAAYYLNDLDRIAQPNYIPTQQDVLRTRVK
TSGIFETKFQVDKVNFHMFDVGAQRDERRKWIQCFNDVTAIIFVVDSSDYNRLQEALNDF
KSIWNNRWLRTISVILFLNKQDLLAEKVLAGKSKIEDYFPEFARYTTPEDATPEPGEDPR
VTRAKYFIRDEFLRISTASGDGRHYCYPHFTCSVDTENARRIFNDCRDIIQRMHLRQYEL
L

Sequence of entity 2 (B), FASTA

>8YG4_2 Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 (chains B)
HGSLLQSELDQLRQEAEQLKNQIRDARKACADATLSQITNNIDPVGRIQMRTRRTLRGHL
AKIYAMHWGTDSRLLVSASQDGKLIIWDSYTTNKVHAIPLRSSWVMTCAYAPSGNYVACG
GLDNICSIYNLKTREGNVRVSRELAGHTGYLSCCRFLDDNQIVTSSGDTTCALWDIETGQ
QTTTFTGHTGDVMSLSLAPDTRLFVSGACDASAKLWDVREGMCRQTFTGHESDINAICFF
PNGNAFATGSDDATCRLFDLRADQELMTYSHDNIICGITSVSFSKSGRLLLAGYDDFNCN
VWDALKADRAGVLAGHDNRVSCLGVTDDGMAVATGSWDSFLKIWNGSSGGGGSG

Sequence of entity 3 (G), FASTA

>8YG4_3 Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 (chains G)
MASNNTASIAQARKLVEQLKMEANIDRIKVSKAAADLMAYCEAHAKEDPLLTPVPASENP
FREKKFFCAIL

Sequence of entity 4 (N), FASTA

>8YG4_4 NB35 (chains N)
MAQVQLQESGGGLVQPGGSLRLSCAASGFTFSNYKMNWVRQAPGKGLEWVSDISQSGASI
SYTGSVKGRFTISRDNAKNTLYLQMNSLKPEDTAVYYCARCPAPFTRDCFDVTSTTYAYR
GQGTQVTVSSHHHHHHEPEA

Sequence of entity 5 (P), FASTA

>8YG4_5 LA-PTH-R1 (chains P)
RVAEIQLMHQRAKWIQDARRRAFLHKLIAEIH

Sequence of entity 6 (R), FASTA

>8YG4_6 Parathyroid hormone/parathyroid hormone-related peptide receptor (chains R)
DADDVMTKEEQIFLLHRAQAQCEKRLKEVLQRPASIMESDKGWTSASTSGKPRKDKASGK
LYPESEEDKEAPTGSRYRGRPCLPEWDHILCWPLGAPGEVVAVPCPDYIYDFNHKGHAYR
RCDRNGSWELVPGHNRTWANYSECVKFLTNETREREVFDRLGMIYTVGYSVSLASLTVAV
LILAYFRRLHCTRNYIHMHLFLSFMLRAVSIFVKDAVLYSGATLDEAERLTEEELRAIAQ
APPPPATAAAGYAGCRVAVTFFLYFLATNYYWILVEGLYLHSLIFMAFFSEKKYLWGFTV
FGWGLPAVFVAVWVSVRATLANTGCWDLSSGNKKWIIQVPILASIVLNFILFINIVRVLA
TKLRETNAGRCDTRQQYRKLLKSTLVLMPLFGVHYIVFMATPYTEVSGTLWQVQMHYEML
FNSFQGFFVAIIYCFCNGEVQAEIKKSWSRWTLALDFKRKARSGSSSYSYGPMVSH

Primary citation

Structural basis of PTH1R-beta-arrestin core engagement reveals design principles for G-protein-biased therapeutics. Zhao, L.H., He, Q., Yuan, Q. et al. Nat Struct Mol Biol (2026) 33:868-881. DOI 10.1038/s41594-026-01806-7 · 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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