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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：P0AA04 New Search
23PDB entries
29Biological assembly
35chain/assembly records
Main Difference Dimensions in This Set
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
1CM2 STRUCTURE OF HIS15ASP HPR AFTER HYDROLYSIS OF RINGED SPECIES. Deposited 1999-05-13 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–85（85 aa）
Mutation：HIS15ASP No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.6；pH 4.6
Resolution 1.80 Å
1CM3 HIS15ASP HPR FROM E. COLI Deposited 1999-05-13 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–85（85 aa）
Mutation：HIS15ASP No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 5.4；pH 5.4
Resolution 1.60 Å
1GGR COMPLEX OF ENZYME IIAGLC AND THE HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR FROM ESCHERICHIA COLI NMR, RESTRAINED REGULARIZED MEAN STRUCTURE Deposited 2000-09-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–85（85 aa）
Not recorded PO3 PHOSPHITE ION × 1 SOLUTION NMR
NMR measurement conditions pH 7.1；308 K；Ionic strength (raw mmCIF value) 10 mM SODIUM PHOSPHATE
Resolution not provided
1HDN THE HIGH-RESOLUTION STRUCTURE OF THE HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR FROM ESCHERICHIA COLI DETERMINED BY RESTRAINED MOLECULAR DYNAMICS FROM NMR NUCLEAR OVERHAUSER EFFECT DATA Deposited 1994-02-10 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–85（85 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR mmCIF provides none of the parsed conditions Resolution not provided
1J6T COMPLEX OF ENZYME IIAMTL AND THE HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR FROM ESCHERICHIA COLI NMR, RESTRAINED REGULARIZED MEAN STRUCTURE Deposited 2002-08-14 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–85（85 aa）
Not recorded PO3 PHOSPHITE ION × 1 SOLUTION NMR
NMR measurement conditions pH 7；308 K；Ionic strength (raw mmCIF value) 10 mM SODIUM PHOSPHATE
Resolution not provided
1OPD HISTIDINE-CONTAINING PROTEIN (HPR), MUTANT WITH SER 46 REPLACED BY ASP (S46D) Deposited 1996-08-01 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–85（85 aa）
Mutation：S46D SO4 SULFATE ION × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.50 Å R-free 0.234
1PFH THE PHOSPHORYLATED FORM OF THE HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR Deposited 1995-08-18 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–85（85 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule SOLUTION NMR mmCIF provides none of the parsed conditions Resolution not provided
1POH THE 2.0 ANGSTROMS RESOLUTION STRUCTURE OF ESCHERICHIA COLI HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR: A REDETERMINATION Deposited 1993-10-19 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–85（85 aa）
Not recorded SO4 SULFATE ION × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.00 Å
1VRC Complex of enzyme IIAmannose and the histidine-containing phosphocarrier protein HPr from escherichia coli nmr, restrained regularized mean structure Deposited 2005-02-21 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 1–85（85 aa）
Chain D 1–85（85 aa）
Not recorded PO3 PHOSPHITE ION × 2 SOLUTION NMR
NMR measurement conditions pH 6.5；308 K；Ionic strength (raw mmCIF value) 40 mM SODIUM PHOSPHATE
Resolution not provided
2JEL JEL42 FAB/HPR COMPLEX Deposited 1998-02-24 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain P 1–85（85 aa）
Not recorded SO4 SULFATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 5.8；pH 5.8
Resolution 2.50 Å R-free 0.280
2LRK Solution Structures of the IIA(Chitobiose)-HPr complex of the N,N'-Diacetylchitobiose Deposited 2012-04-06 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain D 1–85（85 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7.4；308 K；Ionic strength (raw mmCIF value) 0.02；Pressure ambient
NMR sample composition 1.0 mM [U-100% 15N] HPr/IIAChb complex, 1.0 mM [U-100% 13C; U-100% 15N] HPR/IIAChb complex, 1.0 mM [U-100% 13C; U-100% 15N] HPR/IIAChb complex, 90% H2O/10% D2O | 90% H2O/10% D2O
NMR sample composition 1.0 mM [U-100% 15N] HPr/IIAChb complex, 1.0 mM [U-100% 13C; U-100% 15N] HPR/IIAChb complex, 1.0 mM [U-100% 13C; U-100% 15N] HPR/IIAChb complex, 100% D2O | 100% D2O
Resolution not provided
2LRL Solution Structures of the IIA(Chitobiose)-HPr complex of the N,N'-Diacetylchitobiose Branch of the Escherichia coli Phosphotransferase System Deposited 2012-04-06 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain D 1–85（85 aa）
Not recorded PO3 PHOSPHITE ION × 1 SOLUTION NMR
NMR measurement conditions pH 7.4；308 K；Ionic strength (raw mmCIF value) 0.02；Pressure ambient
NMR sample composition 1.0 mM [U-99% 13C; U-99% 15N] protein, 1.0 mM D2O, 95% H2O/5% D2O | 95% H2O/5% D2O
Resolution not provided
3CCD 1.0 A Structure of Post-Succinimide His15Asp HPr Deposited 2008-02-25 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–85（85 aa）
Chain B 1–85（85 aa）
Mutation：His15Asp Mutation：His15Asp SO4 SULFATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.4；287 K；0.1M citrate phosphate buffer, 25% saturated ammonium sulphate, pH 4.4, VAPOR DIFFUSION, HANGING DROP, temperature 287K
Resolution 1.00 Å R-free 0.205
3CCD 1.0 A Structure of Post-Succinimide His15Asp HPr Deposited 2008-02-25 Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–85（85 aa）
Mutation：His15Asp SO4 SULFATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.4；287 K；0.1M citrate phosphate buffer, 25% saturated ammonium sulphate, pH 4.4, VAPOR DIFFUSION, HANGING DROP, temperature 287K
Resolution 1.00 Å R-free 0.205
3CCD 1.0 A Structure of Post-Succinimide His15Asp HPr Deposited 2008-02-25 Assembly 3 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 1–85（85 aa）
Mutation：His15Asp SO4 SULFATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.4；287 K；0.1M citrate phosphate buffer, 25% saturated ammonium sulphate, pH 4.4, VAPOR DIFFUSION, HANGING DROP, temperature 287K
Resolution 1.00 Å R-free 0.205
3EZA COMPLEX OF THE AMINO TERMINAL DOMAIN OF ENZYME I AND THE HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR FROM ESCHERICHIA COLI NMR, RESTRAINED REGULARIZED MEAN STRUCTURE Deposited 1998-11-03 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–85（85 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；313 K
Resolution not provided
3EZB COMPLEX OF THE AMINO TERMINAL DOMAIN OF ENZYME I AND THE HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR FROM ESCHERICHIA COLI Deposited 1998-11-03 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–85（85 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；313 K
Resolution not provided
3EZE COMPLEX OF THE AMINO TERMINAL DOMAIN OF ENZYME I AND THE HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR FROM ESCHERICHIA COLI NMR, RESTRAINED REGULARIZED MEAN STRUCTURE Deposited 1998-11-04 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–85（85 aa）
Not recorded PO3 PHOSPHITE ION × 1 SOLUTION NMR
NMR measurement conditions pH 7；313 K
Resolution not provided
4XWJ Histidine-containing phosphocarrier protein (HPr) and antisigma factor Rsd complex Deposited 2015-01-29 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–85（85 aa）
Mutation：F2S No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；287.15 K；0.1 M NaCl, 0.1 M HEPES (pH 7.5), 1.6 M ammonium sulfate
Resolution 2.10 Å R-free 0.299
5YA0 Crystal structure of LsrK and HPr complex Deposited 2017-08-29 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 1–85（85 aa）
Not recorded HEZ HEXANE-1,6-DIOL × 1 PO4 PHOSPHATE ION × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.2；293 K；5~20% (v/v) PEG-400, 0.1 M sodium phosphate-citrate (pH 4.2), and 0.2 M lithium sulfate
Resolution 3.00 Å R-free 0.239
5YA0 Crystal structure of LsrK and HPr complex Deposited 2017-08-29 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–85（85 aa）
Not recorded HEZ HEXANE-1,6-DIOL × 1 PO4 PHOSPHATE ION × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.2；293 K；5~20% (v/v) PEG-400, 0.1 M sodium phosphate-citrate (pH 4.2), and 0.2 M lithium sulfate
Resolution 3.00 Å R-free 0.239
5YA1 crystal structure of LsrK-HPr complex with ATP Deposited 2017-08-29 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 1–85（85 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 1 HEZ HEXANE-1,6-DIOL × 2 PO4 PHOSPHATE ION × 5 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；5~20% (v/v) PEG-400, 0.1M sodium phosphate-citrate (pH 4.2), 0.2M lithium sulfate
Resolution 2.70 Å R-free 0.254
5YA1 crystal structure of LsrK-HPr complex with ATP Deposited 2017-08-29 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–85（85 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 1 HEZ HEXANE-1,6-DIOL × 2 PO4 PHOSPHATE ION × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；5~20% (v/v) PEG-400, 0.1M sodium phosphate-citrate (pH 4.2), 0.2M lithium sulfate
Resolution 2.70 Å R-free 0.254
5YA2 Crystal structure of LsrK-HPr complex with ADP Deposited 2017-08-30 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 1–85（85 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 1 HEZ HEXANE-1,6-DIOL × 1 PO4 PHOSPHATE ION × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；5~20%(v/v) PEG-400, 0.1M sodium phosphate-citrate (pH 4.2), 0.2M lithium sulfate
Resolution 2.70 Å R-free 0.255
5YA2 Crystal structure of LsrK-HPr complex with ADP Deposited 2017-08-30 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–85（85 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 1 HEZ HEXANE-1,6-DIOL × 1 PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；5~20%(v/v) PEG-400, 0.1M sodium phosphate-citrate (pH 4.2), 0.2M lithium sulfate
Resolution 2.70 Å R-free 0.255
6KCR X-ray structure of the MtlR-HPr complex from Escherichia coli Deposited 2019-06-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–85（85 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；289 K；100 mM Tris-HCl (pH 8.5), 200 mM Mg-acetate, 15% polyethylene glycol (PEG) 8000
Resolution 3.50 Å R-free 0.260
6KCR X-ray structure of the MtlR-HPr complex from Escherichia coli Deposited 2019-06-28 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–85（85 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；289 K；100 mM Tris-HCl (pH 8.5), 200 mM Mg-acetate, 15% polyethylene glycol (PEG) 8000
Resolution 3.50 Å R-free 0.260
9S8B Structure of glycogen phosphorylase - dimeric form - in complex with HPr from Escherichia coli Deposited 2025-08-05 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 1–85（85 aa）
Chain D 1–85（85 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.79 Å
9S8K Structure of glycogen phosphorylase - tetrameric form - in complex with HPr from Escherichia coli Deposited 2025-08-05 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 1–85（85 aa）
Chain F 1–85（85 aa）
Chain G 1–85（85 aa）
Chain H 1–85（85 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.06 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.