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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：Q9JPI9 New Search
8PDB entries
9Biological assembly
9chain/assembly records
Main Difference Dimensions in This Set
Different construct 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
3V8U The crystal structure of transferrin binding protein B (TbpB) from Neisseria meningitidis serogroup B Deposited 2011-12-23 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 22–712（691 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；298 K；2.0 M NaCl and 2.0 M ammonium sulfate, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 2.40 Å R-free 0.308
3V8U The crystal structure of transferrin binding protein B (TbpB) from Neisseria meningitidis serogroup B Deposited 2011-12-23 Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 22–712（691 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；298 K；2.0 M NaCl and 2.0 M ammonium sulfate, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 2.40 Å R-free 0.308
9CLM Transferrin Binding Protein A in complex with transferrin binding protein B and two molecules of transferrin Deposited 2024-07-11 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 1–712（712 aa）
Not recorded BCT BICARBONATE ION × 3 FE FE (III) ION × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
9CLT Transferrin Binding Protein A in complex with transferrin binding protein B and transferrin (iron bound to N lobe only) Deposited 2024-07-12 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain B 20–712（693 aa）
Not recorded BCT BICARBONATE ION × 1 FE FE (III) ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å
9CMG Transferrin Binding Protein A in complex with transferrin binding protein B and transferrin (iron bound in both lobes of Tf) Deposited 2024-07-15 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain B 20–712（693 aa）
Not recorded BCT BICARBONATE ION × 2 FE FE (III) ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.71 Å
9DC4 Transferrin Binding Protein A in complex with transferrin binding protein B, transferrin and globular domain of TonB Deposited 2024-08-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 22–712（691 aa）
Not recorded BCT BICARBONATE ION × 1 FE FE (III) ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
9NHQ The cryo-EM structure of NmTbpA and NmTbpB in a complex Deposited 2025-02-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 22–712（691 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.20 Å
9PA8 NmTbpB and Tf protein complex Deposited 2025-06-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 22–712（691 aa）
Not recorded BCT BICARBONATE ION × 2 FE FE (III) ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
9YZ4 Neisseria gonorrhoeae Transferrin Binding Protein A in complex with Transferrin Binding Protein B and transferrin (iron bound in N lobe only) Deposited 2025-10-29 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain B 21–712（692 aa）
Not recorded BCT BICARBONATE ION × 1 FE FE (III) ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.26 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.