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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：P0ACB0 New Search
10PDB entries
13Biological assembly
53chain/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
1B79 N-TERMINAL DOMAIN OF DNA REPLICATION PROTEIN DNAB Deposited 1999-01-28 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 16–129（114 aa） Fragment：N-TERMINAL DOMAIN
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.9；pH 6.9, VAPOR DIFFUSION, HANGING DROP
Resolution 2.30 Å R-free 0.293
1B79 N-TERMINAL DOMAIN OF DNA REPLICATION PROTEIN DNAB Deposited 1999-01-28 Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 16–129（114 aa） Fragment：N-TERMINAL DOMAIN
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.9；pH 6.9, VAPOR DIFFUSION, HANGING DROP
Resolution 2.30 Å R-free 0.293
1B79 N-TERMINAL DOMAIN OF DNA REPLICATION PROTEIN DNAB Deposited 1999-01-28 Assembly 3 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain C 16–129（114 aa） Fragment：N-TERMINAL DOMAIN
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.9；pH 6.9, VAPOR DIFFUSION, HANGING DROP
Resolution 2.30 Å R-free 0.293
1B79 N-TERMINAL DOMAIN OF DNA REPLICATION PROTEIN DNAB Deposited 1999-01-28 Assembly 4 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain D 16–129（114 aa） Fragment：N-TERMINAL DOMAIN
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.9；pH 6.9, VAPOR DIFFUSION, HANGING DROP
Resolution 2.30 Å R-free 0.293
1JWE NMR Structure of the N-Terminal Domain of E. Coli Dnab Helicase Deposited 1999-01-22 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 24–137（114 aa） Fragment：N-TERMINAL DOMAIN
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7.5；305 K；Ionic strength (raw mmCIF value) 20 mM；Pressure 1
Resolution not provided
6QEM E. coli DnaBC complex bound to ssDNA Deposited 2019-01-08 Assembly 1 Protein–DNA Heteromer；Protein × 12 PDB declaration: tridecameric（13） Consistent with all polymers
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Chain D 1–471（471 aa）
Chain E 1–471（471 aa）
Chain F 1–471（471 aa）
Not recorded 08T [[[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl]oxy-oxidanyl-phosphoryl]oxy-tris(fluoranyl)beryllium × 5 MG MAGNESIUM ION × 5 ADP ADENOSINE-5'-DIPHOSPHATE × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å
7T20 E. coli DnaB bound to ssDNA and AMPPNP Deposited 2021-12-02 Assembly 1 Protein–DNA Homooligomer；Protein × 6 PDB declaration: heptameric（7） Consistent with all polymers
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Chain D 1–471（471 aa）
Chain E 1–471（471 aa）
Chain F 1–471（471 aa）
Not recorded ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 4 MG MAGNESIUM ION × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6；20 mM Tris-HCl, pH 7.6, 100 mM NaCl, 5 mM MgCl2, 3 mM DTT, 0.25 mM EDTA and 100 micromolar ADP.
cryo-EM vitrification conditions Cryogen ETHANE；3 microL of sample was applied to glow-discharged grids. Grids were blotted at 6 degrees C for 3.5 s with no extra blot force.
Resolution 4.70 Å
7T21 E. coli DnaB bound to ssDNA and ADP-AlF4 Deposited 2021-12-02 Assembly 1 Protein–DNA Homooligomer；Protein × 6 PDB declaration: heptameric（7） Consistent with all polymers
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Chain D 1–471（471 aa）
Chain E 1–471（471 aa）
Chain F 1–471（471 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 5 ALF TETRAFLUOROALUMINATE ION × 5 MG MAGNESIUM ION × 5 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6；20 mM Tris-HCl, pH 7.6, 100 mM NaCl, 5 mM MgCl2, 3 mM DTT, 0.25 mM EDTA and 100 micromolar ADP.
cryo-EM vitrification conditions Cryogen ETHANE；3 microL of sample was applied to glow-discharged grids. Grids were blotted at 6 degrees C for 3.5 s with no extra blot force.
Resolution 5.40 Å
7T22 E. coli DnaB bound to three DnaG C-terminal domains, ssDNA, ADP and AlF4 Deposited 2021-12-02 Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: decameric（10） Consistent with all polymers
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Chain D 1–471（471 aa）
Chain E 1–471（471 aa）
Chain F 1–471（471 aa）
Mutation：F103C Mutation：F103C Mutation：F103C Mutation：F103C Mutation：F103C Mutation：F103C ADP ADENOSINE-5'-DIPHOSPHATE × 5 ALF TETRAFLUOROALUMINATE ION × 5 MG MAGNESIUM ION × 5 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6；20 mM Tris-HCl, pH 7.6, 100 mM NaCl, 5 mM MgCl2, 3 mM DTT, 0.25 mM EDTA and 100 micromolar ADP.
cryo-EM vitrification conditions Cryogen ETHANE；3 microL of sample was applied to glow-discharged grids. Grids were blotted at 6 degrees C for 3.5 s with no extra blot force.
Resolution 4.20 Å
8V9T Ecoli DnaB helicase and Phage Lambda loader P with ADP-Mg in a 6:5 stoichiometry ratio Deposited 2023-12-09 Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: undecameric（11） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Chain D 1–471（471 aa）
Chain E 1–471（471 aa）
Chain F 1–471（471 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 5 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Na-HEPES pH 7.5, 450mM NaCl, 2mM DTT, 0.5mM MgCl2, 0.2mM ATP, 0.25% Glycerol
cryo-EM vitrification conditions Cryogen ETHANE；Protein BP (1.5 uM) and DNA (1.875 uM) was mixed in a 1.25 molar excess. 3uL of the sample was added to a plasma-cleaned grid at 4 degrees celsius, 100 percent humidity, blot force 4, blot time 4s, wait time 30s, total blots 1, and plunge-frozen into liquid nitrogen-cooled ethane.
Resolution 2.84 Å
9ECO E. coli DnaB bound to three DnaG C-terminal domains, ssDNA, ADP and AlF4 Deposited 2024-11-14 Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: nonameric（9） Consistent with all polymers
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Chain D 1–471（471 aa）
Chain E 1–471（471 aa）
Chain F 1–471（471 aa）
Mutation：F103C Mutation：F103C Mutation：F103C Mutation：F103C Mutation：F103C Mutation：F103C ALF TETRAFLUOROALUMINATE ION × 5 ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 5 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6；20 mM Tris-HCl, pH 7.6, 100 mM NaCl, 5 mM MgCl2, 3 mM DTT, 0.25 mM EDTA and 100 micromolar ADP, 0.5 mM AlCl3, 5 mM NaF.
cryo-EM vitrification conditions Cryogen ETHANE；3 microL of sample was applied to glow-discharged grids. Grids were blotted at 6 degrees C for 3.5 s with no extra blot force.
Resolution 2.83 Å
9OA1 Ecoli DnaB helicase and Phage Lambda loader P with ADP-Mg in a 6:5 stoichiometry ratio. Deposited 2025-04-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: undecameric（11） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Chain D 1–471（471 aa）
Chain E 1–471（471 aa）
Chain F 1–471（471 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 6 MG MAGNESIUM ION × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Na-HEPES pH 7.5, 450mM NaCl, 2mM DTT, 0.5mM MgCl2, 0.2mM ATP, 0.25% Glycerol
cryo-EM vitrification conditions Cryogen ETHANE；Protein BP (1.5 uM) and DNA (1.875 uM) was mixed in a 1.25 molar excess. 3uL of the sample was added to a plasma-cleaned grid at 4 degrees celsius, 100 percent humidity, blot force 4, blot time 4s, wait time 30s, total blots 1, and plunge-frozen into liquid nitrogen-cooled ethane.
Resolution 2.66 Å
9OA2 Ecoli DnaB helicase and Phage Lambda loader P with ADP-Mg in a 6:6 stoichiometry ratio. Deposited 2025-04-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Chain D 1–471（471 aa）
Chain E 1–471（471 aa）
Chain F 1–471（471 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 6 MG MAGNESIUM ION × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Na-HEPES pH 7.5, 450mM NaCl, 2mM DTT, 0.5mM MgCl2, 0.2mM ATP, 0.25% Glycerol
cryo-EM vitrification conditions Cryogen ETHANE；Protein BP (1.5 uM), ssDNA (1.875 uM), and LO-156-299-NHis (2.25 uM) was mixed at 1.25 and 1.5 molar excess, respectively. 3uL of the sample was added to a plasma-cleaned grid at 4 degrees celsius, 100 percent humidity, blot force 4, blot time 4s, wait time 30s, total blots 1, and plunge-frozen into liquid nitrogen-cooled ethane.
Resolution 3.85 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.