← 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：P06971 New Search
13PDB entries
14Biological assembly
17chain/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
1BY3 FHUA FROM E. COLI Deposited 1998-10-22 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 34–747（714 aa）
Not recorded OES N-OCTYL-2-HYDROXYETHYL SULFOXIDE × 7 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.2；PROTEIN WAS CRYSTALLIZED FROM 33% PEG2000, 0.45 M NACL, 0.15 M NAPI (PH 6.2) AND 0.5% N-OCTYL-2-HYDROXYETHYLSULFOXIDE
Resolution 2.74 Å R-free 0.244
1FCP FERRIC HYDROXAMATE UPTAKE RECEPTOR (FHUA) FROM E.COLI IN COMPLEX WITH BOUND FERRICHROME-IRON Deposited 1998-10-14 Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 52–747（696 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) NI NICKEL (II) ION × 2 LIL 2-TRIDECANOYLOXY-PENTADECANOIC ACID × 2 AAE ACETOACETIC ACID × 1 LIM 3-OXO-PENTADECANOIC ACID × 1 EA2 AMINOETHANOLPYROPHOSPHATE × 1 FCI FERRICROCIN-IRON × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.4；100MM NA-CACODYLATE, PH 6.4, 12.5% PEG2000 MME, 20% GLYCEROL, 3% PEG200
Resolution 2.70 Å R-free 0.281
1FI1 FhuA in complex with lipopolysaccharide and rifamycin CGP4832 Deposited 2000-08-03 Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 52–747（696 aa）
Mutation：HEXAHISTIDINE TAG PLUS FIVE LINKER RESIDUES HAVE BEEN GENETICALLY INSERTED AFTER RESIDUE 405 OF THE MATURE SEQUENCE FTT 3-HYDROXY-TETRADECANOIC ACID × 6 PO4 PHOSPHATE ION × 2 NI NICKEL (II) ION × 1 NA SODIUM ION × 1 MG MAGNESIUM ION × 1 DPO DIPHOSPHATE × 2 RIF RIFAMYCIN CGP 4832 × 1 DDQ DECYLAMINE-N,N-DIMETHYL-N-OXIDE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.4；291 K；100 mM sodium cacodylate, 12% PEG 2,000 MME, 3% PEG 200, 1% cis-inositol, 20% glycerol, 1 mM rifamycin CGP 4832, pH 6.4, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Resolution 2.90 Å R-free 0.275
1QFF E. COLI FERRIC HYDROXAMATE UPTAKE RECEPTOR (FHUA) IN COMPLEX WITH BOUND FERRICHROME-IRON Deposited 1999-04-10 Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 34–747（714 aa）
Mutation：SER-SER-HIS-HIS-HIS-HIS-HIS-HIS-GLY-SER-SER AFFINITY TAG Non-standard monomer：Yes (specific site not provided by mmCIF) PO4 PHOSPHATE ION × 2 FTT 3-HYDROXY-TETRADECANOIC ACID × 4 DAO LAURIC ACID × 1 MYR MYRISTIC ACID × 1 DPO DIPHOSPHATE × 1 EAP 2-AMINO-VINYL-PHOSPHATE × 1 FCI FERRICROCIN-IRON × 1 DDQ DECYLAMINE-N,N-DIMETHYL-N-OXIDE × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.4；pH 6.4
Resolution 2.70 Å R-free 0.276
1QFG E. COLI FERRIC HYDROXAMATE RECEPTOR (FHUA) Deposited 1999-04-10 Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 34–747（714 aa）
Mutation：YES NI NICKEL (II) ION × 1 PO4 PHOSPHATE ION × 2 FTT 3-HYDROXY-TETRADECANOIC ACID × 4 DAO LAURIC ACID × 1 MYR MYRISTIC ACID × 1 DDQ DECYLAMINE-N,N-DIMETHYL-N-OXIDE × 3 DPO DIPHOSPHATE × 2 GOL GLYCEROL × 8 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.4；290 K；100MM SODIUM CACODYLATE (PH 6.4), 12.5% PEG 2000 MONOMETHYLETHER, 20% GLYCEROL, 1% CIS-INOSITOL, 3% PEG 200, VAPOR DIFFUSION, HANGING DROP, temperature 290K
Resolution 2.50 Å R-free 0.271
1QJQ FERRIC HYDROXAMATE RECEPTOR FROM ESCHERICHIA COLI (FHUA) Deposited 1999-06-29 Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 34–438（405 aa）
Chain A 439–747（309 aa）
Mutation：YES Mutation：YES FTT 3-HYDROXY-TETRADECANOIC ACID × 6 DPO DIPHOSPHATE × 2 PO4 PHOSPHATE ION × 2 NI NICKEL (II) ION × 1 PFC PHENYLFERRICROCIN-IRON × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.4；100MM SODIUM CACODYLATE (PH 6.4), 14.5% PEG 2000 MONOMETHYLETHER, 20% GLYCEROL, 3% PEG 200, 1 MM PHENYLFERRICROCIN-IRON
Resolution 2.95 Å R-free 0.278
1QKC ESCHERICHIA COLI FERRIC HYDROXAMATE UPTAKE RECEPTOR (FHUA) IN COMPLEX DELTA TWO-ALBOMYCIN Deposited 1999-07-18 Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 34–438（405 aa）
Chain A 439–747（309 aa）
Mutation：YES Mutation：YES FTT 3-HYDROXY-TETRADECANOIC ACID × 6 DPO DIPHOSPHATE × 2 PO4 PHOSPHATE ION × 2 NI NICKEL (II) ION × 1 ALB DELTA-2-ALBOMYCIN A1 × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.4；100 MM SODIUM CACODYLATE (PH 6.4), 14.0% POLYETHYLGLYCOL 2000 MONOMETHYLETHER, 20% GLYCEROL, 3% POLYETHYLGLYCOL 200, 1% CIS-INOSITOL, 0.3 MM DELTA TWO ALBOMYCIN
Resolution 3.10 Å R-free 0.283
2FCP FERRIC HYDROXAMATE UPTAKE RECEPTOR (FHUA) FROM E.COLI Deposited 1998-10-15 Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 34–747（714 aa）
Not recorded NI NICKEL (II) ION × 2 LIL 2-TRIDECANOYLOXY-PENTADECANOIC ACID × 2 AAE ACETOACETIC ACID × 1 LIM 3-OXO-PENTADECANOIC ACID × 1 EA2 AMINOETHANOLPYROPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.4；100MM NA-CACODYLATE, PH 6.4, 12.5% PEG2000 MME, 20% GLYCEROL, 1% CIS-INOSITOL, 3% PEG200
Resolution 2.50 Å R-free 0.283
2GRX Crystal structure of TonB in complex with FhuA, E. coli outer membrane receptor for ferrichrome Deposited 2006-04-25 Assembly 1 Other combination Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 34–758（725 aa）
Not recorded PO4 PHOSPHATE ION × 1 FTT 3-HYDROXY-TETRADECANOIC ACID × 4 DPO DIPHOSPHATE × 1 DAO LAURIC ACID × 1 EAP 2-AMINO-VINYL-PHOSPHATE × 1 FCI FERRICROCIN-IRON × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；291 K；8% polyethylene glycol 4000, 50 mM MES (pH 6.0), 75 mM NaCl, 5% glycerol, 0.7% C8E4, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Resolution 3.30 Å R-free 0.329
2GRX Crystal structure of TonB in complex with FhuA, E. coli outer membrane receptor for ferrichrome Deposited 2006-04-25 Assembly 2 Other combination Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 34–758（725 aa）
Not recorded PO4 PHOSPHATE ION × 1 FTT 3-HYDROXY-TETRADECANOIC ACID × 4 DPO DIPHOSPHATE × 1 DAO LAURIC ACID × 1 EAP 2-AMINO-VINYL-PHOSPHATE × 1 FCI FERRICROCIN-IRON × 1 MYR MYRISTIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；291 K；8% polyethylene glycol 4000, 50 mM MES (pH 6.0), 75 mM NaCl, 5% glycerol, 0.7% C8E4, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Resolution 3.30 Å R-free 0.329
4CU4 FhuA from E. coli in complex with the lasso peptide microcin J25 (MccJ25) Deposited 2014-03-17 Assembly 1 Other combination Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 53–438（386 aa） Fragment：RESIDUES 53-747
Chain A 439–747（309 aa） Fragment：RESIDUES 53-747
Not recorded FTT 3-HYDROXY-TETRADECANOIC ACID × 4 DAO LAURIC ACID × 1 MYR MYRISTIC ACID × 1 LDA LAURYL DIMETHYLAMINE-N-OXIDE × 20 3PH 1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE × 1 DPO DIPHOSPHATE × 2 PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 5；20 MM TRIS PH 7.5, 120 MM LITHIUM SULFATE, 100 MM SODIUM CITRATE PH 5, 20 % PEG300
Resolution 2.30 Å R-free 0.255
8A60 Crystal structure of FhuA in complex with the superinfection exclusion lipoprotein Llp Deposited 2022-06-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 34–747（714 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；293 K；12-16% PEG 4000 0.4 M sodium isothiocyanate 0.1 M sodium acetate
Resolution 3.37 Å R-free 0.307
8A8C T5 phage receptor-binding protein pb5 bound to ferrichrome transporter FhuA Deposited 2022-06-22 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 34–747（714 aa）
Not recorded LU9 [(2R,3S,4R,5R,6R)-2-[[(2R,4R,5R,6R)-6-[(1R)-1,2-bis(oxidanyl)ethyl]-4-[(2R,4R,5R,6R)-6-[(1R)-1,2-bis(oxidanyl)ethyl]-2-carboxy-4,5-bis(oxidanyl)oxan-2-yl]oxy-2-carboxy-5-oxidanyl-oxan-2-yl]oxymethyl]-5-[[(3R)-3-dodecanoyloxytetradecanoyl]amino]-4-(3-nonanoyloxypropanoyloxy)-6-[[(2R,3S,4R,5R,6R)-3-oxidanyl-4-[(3S)-3-oxidanyltetradecanoyl]oxy-5-[[(3R)-3-oxidanyltridecanoyl]amino]-6-phosphonatooxy-oxan-2-yl]methoxy]oxan-3-yl] phosphate × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
8B14 T5 Receptor Binding Protein pb5 in complex with its E. coli receptor FhuA Deposited 2022-09-09 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 34–747（714 aa）
Mutation：Presence of an Histag after P405, added residues : SHHHHHHGS DDQ DECYLAMINE-N,N-DIMETHYL-N-OXIDE × 1 LU9 [(2R,3S,4R,5R,6R)-2-[[(2R,4R,5R,6R)-6-[(1R)-1,2-bis(oxidanyl)ethyl]-4-[(2R,4R,5R,6R)-6-[(1R)-1,2-bis(oxidanyl)ethyl]-2-carboxy-4,5-bis(oxidanyl)oxan-2-yl]oxy-2-carboxy-5-oxidanyl-oxan-2-yl]oxymethyl]-5-[[(3R)-3-dodecanoyloxytetradecanoyl]amino]-4-(3-nonanoyloxypropanoyloxy)-6-[[(2R,3S,4R,5R,6R)-3-oxidanyl-4-[(3S)-3-oxidanyltetradecanoyl]oxy-5-[[(3R)-3-oxidanyltridecanoyl]amino]-6-phosphonatooxy-oxan-2-yl]methoxy]oxan-3-yl] phosphate × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 8.5
cryo-EM vitrification conditions Cryogen ETHANE；3.5 microliters of the FhuA-pb5 complex were deposited on a freshly glow discharged (25 mA, 30 sec) Cu/Rh 400 mesh Quantifoil R 2/1 EM grids and flash-frozen in nitrogen-cooled liquid ethane using a ThermoFisher Mark IV Vitrobot device (100% humidity, 293.15K, 2s blotting time, blot force 1).
Resolution 2.60 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.