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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：P0AC13 New Search
6PDB entries
7Biological assembly
9chain/assembly records
Main Difference Dimensions in This Set
Different construct Different assembly state Different ligand/ion 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
1AJ0 CRYSTAL STRUCTURE OF A TERNARY COMPLEX OF E. COLI DIHYDROPTEROATE SYNTHASE Deposited 1997-05-14 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–282（282 aa）
Not recorded SO4 SULFATE ION × 1 PH2 2-AMINO-6-HYDROXYMETHYL-7,8-DIHYDRO-3H-PTERIDIN-4-ONE × 1 SAN SULFANILAMIDE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 8.4；PROTEIN WAS CRYSTALLIZED FROM 42% AMMONIUM SULFATE, 50MM TRIS-HCL, PH 8.4.
Resolution 2.00 Å
1AJ2 CRYSTAL STRUCTURE OF A BINARY COMPLEX OF E. COLI DIHYDROPTEROATE SYNTHASE Deposited 1997-05-14 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–282（282 aa）
Not recorded SO4 SULFATE ION × 1 2PH [7,8-DIHYDRO-PTERIN-6-YL METHANYL]-PHOSPHONOPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 8.4；PROTEIN WAS CRYSTALLIZED FROM 42% AMMONIUM SULFATE, 50MM TRIS-HCL, PH 8.4.
Resolution 2.00 Å
1AJZ STRUCTURE OF DIHYDROPTEROATE PYROPHOSPHORYLASE Deposited 1997-05-13 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–282（282 aa）
Not recorded SO4 SULFATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 8.4；PROTEIN WAS CRYSTALLIZED FROM 42% AMMONIUM SULFATE, 50MM TRIS-HCL, PH 8.4.
Resolution 2.00 Å
7TQ1 Crystal structure of adaptive laboratory evolved sulfonamide-resistant Dihydropteroate Synthase (DHPS) from Escherichia coli in complex with 6-hydroxymethylpterin Deposited 2022-01-26 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–282（282 aa）
Not recorded HHR 6-HYDROXYMETHYLPTERIN × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；298 K；25% (w/v) PEG 3350, 0.2 M magnesium chloride, 0.1 M Tris pH 8.5, 2 mM 6-hydroxymethyl- 7,8-dihydropterin diphosphate + 2mM para-aminobenzoic acid
Resolution 2.73 Å R-free 0.288
7TQ1 Crystal structure of adaptive laboratory evolved sulfonamide-resistant Dihydropteroate Synthase (DHPS) from Escherichia coli in complex with 6-hydroxymethylpterin Deposited 2022-01-26 Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–282（282 aa）
Not recorded HHR 6-HYDROXYMETHYLPTERIN × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；298 K；25% (w/v) PEG 3350, 0.2 M magnesium chloride, 0.1 M Tris pH 8.5, 2 mM 6-hydroxymethyl- 7,8-dihydropterin diphosphate + 2mM para-aminobenzoic acid
Resolution 2.73 Å R-free 0.288
9P4A E. coli Dihydropteroate Synthase in complex with pterin-based inhibitor Deposited 2025-06-16 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–282（282 aa）
Chain B 1–282（282 aa）
Not recorded A1CG3 (2S)-2-(7-amino-4,5-dioxo-1,4,5,6-tetrahydropyrimido[4,5-c]pyridazin-3-yl)propanoic acid × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；50 mM Tris, 32-50% Ammonium Sulfate
Resolution 3.00 Å R-free 0.337
9P5I E. coli Dihydropteroate Synthase in complex with pterin-based inhibitor Deposited 2025-06-18 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–275（275 aa）
Chain B 1–275（275 aa）
Not recorded A1CG7 7-amino-1-methyl-3-{[(1H-tetrazol-5-yl)amino]methyl}pyrimido[4,5-c]pyridazine-4,5(1H,6H)-dione × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；50 mM Tris, 32-50% Ammonium Sulfate
Resolution 2.14 Å R-free 0.238

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.