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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：A3FQJ9 New Search
1PDB entries
3Biological assembly
6chain/assembly records
Main Difference Dimensions in This Set
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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
12SS Crystal Structure of Superoxide dismutase from Cryptosporidium parvum Deposited 2026-04-16 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 26–221（196 aa） Fragment：P26-S221
Chain C 26–221（196 aa） Fragment：P26-S221
Not recorded MN MANGANESE (II) ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；291 K；Berkeley D6: 25% (w/v) PEG 3350, 100 mM MES pH 5.5, 200 mM Ammonium acetate. ChtrB.20815.a.B1.PW39484 at 13.5 mg/mL. Metal assigned as Mn acquired from expression. P31 twinned, plate 20585 D6 drop1, Puck: PSL-2101, Cryo: 20% PEG 200 + 80% crystallant
Resolution 2.01 Å R-free 0.197
12SS Crystal Structure of Superoxide dismutase from Cryptosporidium parvum Deposited 2026-04-16 Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 26–221（196 aa） Fragment：P26-S221
Chain D 26–221（196 aa） Fragment：P26-S221
Not recorded MN MANGANESE (II) ION × 2 EDO 1,2-ETHANEDIOL × 1 PEG DI(HYDROXYETHYL)ETHER × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；291 K；Berkeley D6: 25% (w/v) PEG 3350, 100 mM MES pH 5.5, 200 mM Ammonium acetate. ChtrB.20815.a.B1.PW39484 at 13.5 mg/mL. Metal assigned as Mn acquired from expression. P31 twinned, plate 20585 D6 drop1, Puck: PSL-2101, Cryo: 20% PEG 200 + 80% crystallant
Resolution 2.01 Å R-free 0.197
12SS Crystal Structure of Superoxide dismutase from Cryptosporidium parvum Deposited 2026-04-16 Assembly 3 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 26–221（196 aa） Fragment：P26-S221
Chain F 26–221（196 aa） Fragment：P26-S221
Not recorded MN MANGANESE (II) ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；291 K；Berkeley D6: 25% (w/v) PEG 3350, 100 mM MES pH 5.5, 200 mM Ammonium acetate. ChtrB.20815.a.B1.PW39484 at 13.5 mg/mL. Metal assigned as Mn acquired from expression. P31 twinned, plate 20585 D6 drop1, Puck: PSL-2101, Cryo: 20% PEG 200 + 80% crystallant
Resolution 2.01 Å R-free 0.197

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.