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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：P23367 New Search
11PDB entries
21Biological assembly
33chain/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
1B62 MUTL COMPLEXED WITH ADP Deposited 1999-01-11 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–349（349 aa） Fragment：ATPASE FRAGMENT
Not recorded MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 8.5；pH 8.5
Resolution 2.10 Å R-free 0.253
1B63 MUTL COMPLEXED WITH ADPNP Deposited 1999-01-20 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–331（331 aa） Fragment：ATPASE FRAGMENT
Not recorded MG MAGNESIUM ION × 2 EDO 1,2-ETHANEDIOL × 4 ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 8.5；pH 8.5
Resolution 1.90 Å R-free 0.261
1BKN CRYSTAL STRUCTURE OF AN N-TERMINAL 40KD FRAGMENT OF E. COLI DNA MISMATCH REPAIR PROTEIN MUTL Deposited 1998-07-09 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–349（349 aa） Fragment：N-TERMINAL 40KD FRAGMENT
Chain B 1–349（349 aa） Fragment：N-TERMINAL 40KD FRAGMENT
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.6；pH 6.6
Resolution 2.90 Å R-free 0.300
1X9Z Crystal structure of the MutL C-terminal domain Deposited 2004-08-24 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 432–615（184 aa） Fragment：C-terminal domain
Chain B 432–615（184 aa） Fragment：C-terminal domain
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) CL CHLORIDE ION × 2 NA SODIUM ION × 1 GOL GLYCEROL × 2 IPA ISOPROPYL ALCOHOL × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 4.6；277 K；NaCl, Li2SO4, sodium acetate, pH 4.6, VAPOR DIFFUSION, temperature 277K
Resolution 2.10 Å R-free 0.278
1X9Z Crystal structure of the MutL C-terminal domain Deposited 2004-08-24 Assembly 2 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 432–615（184 aa） Fragment：C-terminal domain
Chain B 432–615（184 aa） Fragment：C-terminal domain
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) CL CHLORIDE ION × 4 NA SODIUM ION × 2 GOL GLYCEROL × 4 IPA ISOPROPYL ALCOHOL × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 4.6；277 K；NaCl, Li2SO4, sodium acetate, pH 4.6, VAPOR DIFFUSION, temperature 277K
Resolution 2.10 Å R-free 0.278
1X9Z Crystal structure of the MutL C-terminal domain Deposited 2004-08-24 Assembly 3 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 432–615（184 aa） Fragment：C-terminal domain
Chain B 432–615（184 aa） Fragment：C-terminal domain
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) CL CHLORIDE ION × 4 NA SODIUM ION × 2 GOL GLYCEROL × 4 IPA ISOPROPYL ALCOHOL × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 4.6；277 K；NaCl, Li2SO4, sodium acetate, pH 4.6, VAPOR DIFFUSION, temperature 277K
Resolution 2.10 Å R-free 0.278
1X9Z Crystal structure of the MutL C-terminal domain Deposited 2004-08-24 Assembly 4 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 432–615（184 aa） Fragment：C-terminal domain
Non-standard monomer：Yes (specific site not provided by mmCIF) CL CHLORIDE ION × 4 NA SODIUM ION × 2 GOL GLYCEROL × 2 IPA ISOPROPYL ALCOHOL × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 4.6；277 K；NaCl, Li2SO4, sodium acetate, pH 4.6, VAPOR DIFFUSION, temperature 277K
Resolution 2.10 Å R-free 0.278
1X9Z Crystal structure of the MutL C-terminal domain Deposited 2004-08-24 Assembly 5 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 432–615（184 aa） Fragment：C-terminal domain
Non-standard monomer：Yes (specific site not provided by mmCIF) GOL GLYCEROL × 2 IPA ISOPROPYL ALCOHOL × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 4.6；277 K；NaCl, Li2SO4, sodium acetate, pH 4.6, VAPOR DIFFUSION, temperature 277K
Resolution 2.10 Å R-free 0.278
5AKB MutS in complex with the N-terminal domain of MutL - crystal form 1 Deposited 2015-03-03 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 1–349（349 aa） Fragment：N-TERMINAL DOMAIN
Chain D 1–349（349 aa） Fragment：N-TERMINAL DOMAIN
Mutation：YES Mutation：YES ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 X-RAY DIFFRACTION
X-ray crystallization conditions 9-12% PEG8000, 100 MM TRIS PH 7.0, 200 MM MGCL2, 80-450 MM SODIUM MALONATE
Resolution 4.71 Å R-free 0.349
5AKB MutS in complex with the N-terminal domain of MutL - crystal form 1 Deposited 2015-03-03 Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain F 1–349（349 aa） Fragment：N-TERMINAL DOMAIN
Mutation：YES ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 X-RAY DIFFRACTION
X-ray crystallization conditions 9-12% PEG8000, 100 MM TRIS PH 7.0, 200 MM MGCL2, 80-450 MM SODIUM MALONATE
Resolution 4.71 Å R-free 0.349
5AKC MutS in complex with the N-terminal domain of MutL - crystal form 2 Deposited 2015-03-03 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 1–349（349 aa） Fragment：N-TERMINAL DOMAIN
Chain D 1–349（349 aa） Fragment：N-TERMINAL DOMAIN
Mutation：YES Mutation：YES ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 X-RAY DIFFRACTION
X-ray crystallization conditions 9-12% PEG8000, 100 MM TRIS PH 7.0, 200 MM MGCL2, 80-450 MM SODIUM MALONATE
Resolution 6.60 Å R-free 0.291
5AKC MutS in complex with the N-terminal domain of MutL - crystal form 2 Deposited 2015-03-03 Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain G 1–349（349 aa） Fragment：N-TERMINAL DOMAIN
Chain H 1–349（349 aa） Fragment：N-TERMINAL DOMAIN
Mutation：YES Mutation：YES ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 X-RAY DIFFRACTION
X-ray crystallization conditions 9-12% PEG8000, 100 MM TRIS PH 7.0, 200 MM MGCL2, 80-450 MM SODIUM MALONATE
Resolution 6.60 Å R-free 0.291
5AKC MutS in complex with the N-terminal domain of MutL - crystal form 2 Deposited 2015-03-03 Assembly 3 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain K 1–349（349 aa） Fragment：N-TERMINAL DOMAIN
Chain L 1–349（349 aa） Fragment：N-TERMINAL DOMAIN
Mutation：YES Mutation：YES ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 X-RAY DIFFRACTION
X-ray crystallization conditions 9-12% PEG8000, 100 MM TRIS PH 7.0, 200 MM MGCL2, 80-450 MM SODIUM MALONATE
Resolution 6.60 Å R-free 0.291
5AKD MutS in complex with the N-terminal domain of MutL - crystal form 3 Deposited 2015-03-03 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 1–349（349 aa） Fragment：N-TERMINAL DOMAIN, RESIDUES 1-349
Chain D 1–349（349 aa） Fragment：N-TERMINAL DOMAIN, RESIDUES 1-349
Mutation：YES Mutation：YES ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 X-RAY DIFFRACTION
X-ray crystallization conditions 9-12% PEG8000, 100 MM TRIS PH 7.0, 200 MM MGCL2, 80-450 MM SODIUM MALONATE
Resolution 7.60 Å R-free 0.306
5AKD MutS in complex with the N-terminal domain of MutL - crystal form 3 Deposited 2015-03-03 Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain G 1–349（349 aa） Fragment：N-TERMINAL DOMAIN, RESIDUES 1-349
Chain H 1–349（349 aa） Fragment：N-TERMINAL DOMAIN, RESIDUES 1-349
Mutation：YES Mutation：YES ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 X-RAY DIFFRACTION
X-ray crystallization conditions 9-12% PEG8000, 100 MM TRIS PH 7.0, 200 MM MGCL2, 80-450 MM SODIUM MALONATE
Resolution 7.60 Å R-free 0.306
5AKD MutS in complex with the N-terminal domain of MutL - crystal form 3 Deposited 2015-03-03 Assembly 3 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain K 1–349（349 aa） Fragment：N-TERMINAL DOMAIN, RESIDUES 1-349
Chain L 1–349（349 aa） Fragment：N-TERMINAL DOMAIN, RESIDUES 1-349
Mutation：YES Mutation：YES ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 X-RAY DIFFRACTION
X-ray crystallization conditions 9-12% PEG8000, 100 MM TRIS PH 7.0, 200 MM MGCL2, 80-450 MM SODIUM MALONATE
Resolution 7.60 Å R-free 0.306
7AIB MutS-MutL in clamp state Deposited 2020-09-26 Assembly 1 Protein–DNA Heteromer；Protein × 3 PDB declaration: pentameric（5） Consistent with all polymers
Chain C 1–331（331 aa）
Mutation：N131C,C61S,C216L,C256F,C276Y ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；blot for 3 seconds before plunging
Resolution 4.70 Å
7AIC MutS-MutL in clamp state (kinked clamp domain) Deposited 2020-09-26 Assembly 1 Protein–DNA Heteromer；Protein × 3 PDB declaration: pentameric（5） Consistent with all polymers
Chain C 1–331（331 aa）
Mutation：N131C,C61S,C216L,C256F,C276Y ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；blot for 3 seconds before plunging
Resolution 5.00 Å
7P8V The structure of E. coli MutL bound to a 3' resected DNA end Deposited 2021-07-23 Assembly 1 Protein–DNA Homooligomer；Protein × 2 PDB declaration: tetrameric（4） Consistent with all polymers
Chain A 1–615（615 aa）
Chain B 1–615（615 aa）
Not recorded ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 MG MAGNESIUM ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å
9PRP N-terminal domain of E. coli MutL bound to NP660 Deposited 2025-07-24 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–349（349 aa）
Not recorded A1CKR 5-(cyclopentyloxy)benzene-1,3-diol × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；295 K；21% PEG3350, 200 mM ammonium tartrate, 100 mM Bis-Tris, pH 6.0
Resolution 2.10 Å R-free 0.295
9PRP N-terminal domain of E. coli MutL bound to NP660 Deposited 2025-07-24 Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 1–349（349 aa）
Not recorded A1CKR 5-(cyclopentyloxy)benzene-1,3-diol × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；295 K；21% PEG3350, 200 mM ammonium tartrate, 100 mM Bis-Tris, pH 6.0
Resolution 2.10 Å R-free 0.295

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.