← Back to search

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：A3EX94 New Search
4PDB entries
5Biological assembly
9chain/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
4QZV Bat-derived coronavirus HKU4 uses MERS-CoV receptor human CD26 for cell entry Deposited 2014-07-29 Assembly 1 Other combination Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 372–611（240 aa） Fragment：receptor binding domain (UNP RESIDUES 372-611)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；277 K；0.1M sodium citrate, pH 5.5, 15% PEG 6000, VAPOR DIFFUSION, SITTING DROP, temperature 277K
Resolution 2.59 Å R-free 0.224
4QZV Bat-derived coronavirus HKU4 uses MERS-CoV receptor human CD26 for cell entry Deposited 2014-07-29 Assembly 2 Other combination Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 372–611（240 aa） Fragment：receptor binding domain (UNP RESIDUES 372-611)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；277 K；0.1M sodium citrate, pH 5.5, 15% PEG 6000, VAPOR DIFFUSION, SITTING DROP, temperature 277K
Resolution 2.59 Å R-free 0.224
7M52 B6 Fab fragment bound to the HKU4 spike stem helix peptide Deposited 2021-03-22 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1231–1245（15 aa） Fragment：Residues 1231-1245 of the spike glycoprotein
Not recorded GOL GLYCEROL × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；293 K；0.6 M Sodium Chloride, 0.1 M MES-NaOH, and 20% (w/v) PEG 4000
Resolution 1.50 Å R-free 0.197
8X5O Crystal structure of the post-fusion core of MjHKUr-CoV spike protein. Deposited 2023-11-17 Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 983–1058（76 aa）
Chain B 983–1058（76 aa）
Chain C 983–1058（76 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；289 K；2.8M Sodium Acetate, HCl pH 7.0
Resolution 2.67 Å R-free 0.291
9LZH Prefusion structure of HKU4 spike glycoprotein Deposited 2025-02-21 Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–1291（1291 aa）
Chain B 1–1291（1291 aa）
Chain C 1–1291（1291 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 20 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.16 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.