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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：P18509 New Search
12PDB entries
12Biological assembly
12chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics

Difference tags compare only the current result set; every original PDB and assembly record remains separate.

Related-Structure Differences

Each row represents one biological assembly in one PDB entry; multiple monomers of the same protein are listed separately.

PDB Entry Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Experimental Method Experimental Conditions Structure Quality
1GEA RECEPTOR-BOUND CONFORMATION OF PACAP21 Deposited 2000-10-20 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 132–152（21 aa） Fragment：N-TERMINAL DOMAIN(RESIDUE 132-152)
Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 6.3；298 K；Ionic strength (raw mmCIF value) 0.41；Pressure ambient
NMR sample composition 1.7mM PACAP21; 40mM PACAP receptor; 80mM phosphate buffer (pH 6.3) | 90% H2O/10% D2O
NMR sample composition 1.7mM PACAP21; 40mM PACAP receptor; 80mM phosphate buffer (pH 6.3) | 99.8% D2O
Resolution not provided
2D2P The solution structure of micelle-bound peptide Deposited 2005-09-14 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 132–169（38 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 6.5；298 K；Ionic strength (raw mmCIF value) 20mM potassium phosphate；Pressure ambient
NMR sample composition 0.5mM PACAP38 U-15N,13C; 20mM potassium phosphate buffer; 200mM DPC; 93% H2O, 5% D2O, 2% Glycerol-1,1,2,3,3-d5 | 93% H2O, 5% D2O, 2% Glycerol-1,1,2,3,3-d5
Resolution not provided
2JOD Pac1-Rshort N-terminal EC domain Pacap(6-38) complex Deposited 2007-03-07 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 137–169（33 aa） Fragment：sequence database residues, 137-169
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；298 K；Ionic strength (raw mmCIF value) 100；Pressure ambient
NMR sample composition 0.5 mM [U-100% 13C; U-100% 15N] pac1-R N-terminal EC domain, 0.5 mM PACAP (6-38), 90% H2O/10% D2O | 90% H2O/10% D2O
Resolution not provided
6LPB Cryo-EM structure of the human PAC1 receptor coupled to an engineered heterotrimeric G protein Deposited 2020-01-09 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain P 132–169（38 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.90 Å
6M1I CryoEM structure of human PAC1 receptor in complex with PACAP38 Deposited 2020-02-26 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain B 132–169（38 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
6P9Y PAC1 GPCR Receptor complex Deposited 2019-06-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain P 132–169（38 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.01 Å
6VN7 Cryo-EM structure of an activated VIP1 receptor-G protein complex Deposited 2020-01-29 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain L 132–158（27 aa）
Not recorded CLR CHOLESTEROL × 6 PLM PALMITIC ACID × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å
7VQX Cryo-EM structure of human vasoactive intestinal polypeptide receptor 2 (VIP2R) in complex with PACAP27 and Gs Deposited 2021-10-21 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain L 132–158（27 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.74 Å
7WBJ Cryo-EM structure of N-terminal modified human vasoactive intestinal polypeptide receptor 2 (VIP2R) in complex with PACAP27 and Gs Deposited 2021-12-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain L 132–158（27 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.42 Å
8E3X Cryo-EM structure of the PAC1R-PACAP27-Gs complex Deposited 2022-08-17 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain P 132–158（27 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.30 Å
8E3Y Cryo-EM structure of the VPAC1R-PACAP27-Gs complex Deposited 2022-08-17 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain P 132–158（27 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.30 Å
9P94 Cryo-EM structure of the PAC1sR-PACAP27-Gs complex Deposited 2025-06-24 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain P 132–158（27 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å

This page presents structural evidence recorded in PDB/mmCIF.“No recorded non-water small molecule” does not prove that the experimental sample was ligand-free; experimental conditions belong to the PDB experiment, while ligands and copy counts are shown for each biological assembly.