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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：O43542 New Search
13PDB entries
13Biological assembly
14chain/assembly records
Main Difference Dimensions in This Set
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
9OMY Cryo-EM structure of an octameric RAD51-XRCC3-RAD51C (RAD51-X3C) complex Deposited 2025-05-14 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain G 1–346（346 aa）
Chain X 1–346（346 aa）
Not recorded ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.25 Å
9OMZ Cryo-EM structure of a pentameric RAD51-XRCC3-RAD51C-RAD51D-XRCC2 (51-X3CDX2) complex. Deposited 2025-05-14 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain A 1–346（346 aa）
Not recorded ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.51 Å
9ON2 Cryo-EM structure of a tetrameric XRCC3-RAD51C-RAD51D-XRCC2 complex Deposited 2025-05-14 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 1–346（346 aa）
Not recorded ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.16 Å
9Q23 DX2-CX3-RAD51 structure in the intermediate state Deposited 2025-08-14 Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: heptameric（7） Consistent with all polymers
Chain R 1–346（346 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 2 MG MAGNESIUM ION × 4 ATP ADENOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.84 Å
9Q25 DX2-CX3-RAD51 in the closed state Deposited 2025-08-14 Assembly 1 Protein–DNA Heteromer；Protein × 5 PDB declaration: hexameric（6） Consistent with all polymers
Chain R 1–346（346 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 2 MG MAGNESIUM ION × 4 ATP ADENOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.24 Å
9Q28 DX2-CX3-RAD51 in the active state Deposited 2025-08-14 Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: heptameric（7） Consistent with all polymers
Chain R 1–346（346 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 3 MG MAGNESIUM ION × 5 ATP ADENOSINE-5'-TRIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.84 Å
9Q29 DX2-CX3 structure capping RAD51 filament Deposited 2025-08-14 Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: decameric（10） Consistent with all polymers
Chain R 1–346（346 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 1 CA CALCIUM ION × 13 ATP ADENOSINE-5'-TRIPHOSPHATE × 7 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.61 Å
9Q2A BCDX2-CX3-RAD51-RAD51-ssDNA supercomplex Deposited 2025-08-14 Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: nonameric（9） Consistent with all polymers
Chain R 1–346（346 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 1 MG MAGNESIUM ION × 6 ATP ADENOSINE-5'-TRIPHOSPHATE × 5 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.67 Å
9Q2B DX2-CX3-RAD51 bound to DNA bubble Deposited 2025-08-14 Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: octameric（8） Consistent with all polymers
Chain R 1–346（346 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 1 MG MAGNESIUM ION × 4 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å
9SVX XRCC3-RAD51C-RAD51D-XRCC2 (XRCC3 complex) capping a RAD51 filament on single stranded DNA Deposited 2025-10-03 Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: decameric（10） Consistent with all polymers
Chain D 1–346（346 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 1 MG MAGNESIUM ION × 8 ATP ADENOSINE-5'-TRIPHOSPHATE × 7 CA CALCIUM ION × 5 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；25 mM HEPES-NaOH pH 7.5, 100 mM NaCl, 2.5 mM MgCl2, 2.5 mM CaCl2, 1 mM ATP, 0.25 mM TCEP
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9SVY XRCC3-RAD51C-RAD51D-XRCC2 (XRCC3 complex) capping a RAD51 filament on partially duplex DNA Deposited 2025-10-03 Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 13-meric（13） Consistent with all polymers
Chain D 1–346（346 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 9 MG MAGNESIUM ION × 10 ADP ADENOSINE-5'-DIPHOSPHATE × 1 CA CALCIUM ION × 7 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；25 mM HEPES-NaOH pH 7.5, 100 mM NaCl, 2.5 mM MgCl2, 2.5 mM CaCl2, 1 mM ATP, 0.25 mM TCEP
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
9SW0 XRCC3-RAD51C-RAD51D-XRCC2 (XRCC3 complex) capping a RAD51 filament on a D-loop intermediate Deposited 2025-10-03 Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric（14） Consistent with all polymers
Chain D 1–346（346 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 8 CA CALCIUM ION × 7 MG MAGNESIUM ION × 8 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；25 mM HEPES-NaOH pH 7.5, 100 mM NaCl, 2.5 mM MgCl2, 2.5 mM CaCl2, 1 mM ATP, 0.25 mM TCEP
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
9ZZR Cryo-EM Structure of a RAD51 filament bound by ssDNA and the XRCC3-RAD51C-RAD51D-XRCC2 paralog complex Deposited 2026-01-07 Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: dodecameric（12） Consistent with all polymers
Chain B 1–346（346 aa）
Not recorded ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 11 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.95 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.