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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：Q9X4C9 New Search
6PDB entries
7Biological assembly
34chain/assembly records
Main Difference Dimensions in This Set
Different assembly state Different ligand/ion 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
2R6A Crystal Form BH1 Deposited 2007-09-05 Assembly 1 Protein heterocomplex Heteromer；Protein × 9 PDB declaration: nonameric（9） Consistent with protein count
Chain A 1–454（454 aa）
Chain B 1–454（454 aa）
Not recorded SO4 SULFATE ION × 12 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 6；298 K；1.0M Lithium Sulfate, 5% MPD, pH 6.0, VAPOR DIFFUSION, temperature 298K
Resolution 2.90 Å R-free 0.297
2R6C Crystal Form BH2 Deposited 2007-09-05 Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: octadecameric（18） Consistent with protein count
Chain A 1–454（454 aa）
Chain B 1–454（454 aa）
Chain C 1–454（454 aa）
Chain D 1–454（454 aa）
Chain E 1–454（454 aa）
Chain F 1–454（454 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 6.5；298 K；0.5M Sodium Succinate, pH 6.5, VAPOR DIFFUSION, temperature 298K
Resolution 4.00 Å R-free 0.344
2R6D Crystal Form B1 Deposited 2007-09-05 Assembly 1 Protein homooligomer Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 1–454（454 aa）
Chain B 1–454（454 aa）
Chain C 1–454（454 aa）
Chain D 1–454（454 aa）
Chain E 1–454（454 aa）
Chain F 1–454（454 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 5.5；298 K；1.0M Ammonium Acetate, pH 5.5, VAPOR DIFFUSION, temperature 298K
Resolution 3.70 Å R-free 0.322
2R6E Crystal Form B2 Deposited 2007-09-05 Assembly 1 Protein homooligomer Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 1–454（454 aa）
Chain B 1–454（454 aa）
Not recorded SO4 SULFATE ION × 6 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 7；2.5M Sodium Chloride, pH 7.0, VAPOR DIFFUSION
Resolution 5.02 Å R-free 0.397
4ESV A New Twist on the Translocation Mechanism of Helicases from the Structure of DnaB with its Substrates Deposited 2012-04-23 Assembly 1 Protein–DNA Homooligomer；Protein × 6 PDB declaration: heptameric（7） Consistent with all polymers
Chain A 1–454（454 aa）
Chain B 1–454（454 aa）
Chain C 1–454（454 aa）
Chain D 1–454（454 aa）
Chain E 1–454（454 aa）
Chain F 1–454（454 aa）
Not recorded MES 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 2 CA CALCIUM ION × 11 GDP GUANOSINE-5'-DIPHOSPHATE × 5 ALF TETRAFLUOROALUMINATE ION × 5 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；290 K；4-7% PEG3350, 0.2 M calcium chloride, 0.1 M MES, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 290K
Resolution 3.20 Å R-free 0.289
4ESV A New Twist on the Translocation Mechanism of Helicases from the Structure of DnaB with its Substrates Deposited 2012-04-23 Assembly 2 Protein–DNA Homooligomer；Protein × 6 PDB declaration: heptameric（7） Consistent with all polymers
Chain G 1–454（454 aa）
Chain H 1–454（454 aa）
Chain I 1–454（454 aa）
Chain J 1–454（454 aa）
Chain K 1–454（454 aa）
Chain L 1–454（454 aa）
Not recorded MES 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 2 CA CALCIUM ION × 3 GDP GUANOSINE-5'-DIPHOSPHATE × 5 ALF TETRAFLUOROALUMINATE ION × 5 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；290 K；4-7% PEG3350, 0.2 M calcium chloride, 0.1 M MES, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 290K
Resolution 3.20 Å R-free 0.289
4M4W Mechanistic implications for the bacterial primosome assembly of the structure of a helicase-helicase loader complex Deposited 2013-08-07 Assembly 1 Protein heterocomplex Heteromer；Protein × 15 PDB declaration: pentadecameric（15） Consistent with protein count
Chain A 1–454（454 aa）
Chain B 1–454（454 aa）
Chain C 1–454（454 aa）
Chain D 1–454（454 aa）
Chain E 1–454（454 aa）
Chain F 1–454（454 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 8；290 K；11-13% w/v PEG3350, 0.2 M lithium sulfate, 50 mM TRIS, pH 8.0-8.3, VAPOR DIFFUSION, temperature 290K
Resolution 6.10 Å R-free 0.392

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.