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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：P40938 New Search
16PDB entries
16Biological assembly
16chain/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
6VVO Structure of the human clamp loader (Replication Factor C, RFC) bound to the sliding clamp (Proliferating Cell Nuclear Antigen, PCNA) Deposited 2020-02-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 4 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 4 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å
7Z6H Structure of DNA-bound human RAD17-RFC clamp loader and 9-1-1 checkpoint clamp Deposited 2022-03-11 Assembly 1 Insufficient information Heteromer；Protein × 8 PDB declaration: decameric（10） Consistent with all polymers
Chain E 1–356（356 aa）
Not recorded AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 5 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE
Resolution 3.59 Å
8UI7 Cryo-EM map of human clmap-clamp loader ATAD5-RFC-gapped PCNA complex in intermediate state 3 Deposited 2023-10-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 3 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 3 ADP ADENOSINE-5'-DIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.20 Å
8UI8 Cryo-EM map of human clamp-clamp loader ATAD5-RFC-two PCNAs complex in intermediate state 3 Deposited 2023-10-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 7 PDB declaration: heptameric（7） Consistent with protein count
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 3 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 3 ADP ADENOSINE-5'-DIPHOSPHATE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
8UI9 Cryo-EM map of human clamp-clamp loader ATAD5-RFC-cracked PCNA complex in intermediate state 2 Deposited 2023-10-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 4 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 4 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
8UII Cryo-EM map of human clamp-clamp loader ATAD5-RFC-closed PCNA complex in intermediate state 1 Deposited 2023-10-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 4 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 4 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.04 Å
8UMT Atomic model of the human CTF18-RFC-PCNA binary complex in the three-subunit binding state (state 2) Deposited 2023-10-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 3 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 3 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.33 Å
8UMU Atomic model of the human CTF18-RFC-PCNA binary complex in the four-subunit binding state (state 3) Deposited 2023-10-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 3 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 3 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.16 Å
8UMV Atomic model of the human CTF18-RFC-PCNA-DNA ternary complex with narrow PCNA opening state I (state 5) Deposited 2023-10-18 Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric（10） Consistent with all polymers
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 4 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 4 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.75 Å
8UMW Atomic model of the human CTF18-RFC-PCNA-DNA ternary complex in the five-subunit binding state (state 4) Deposited 2023-10-18 Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric（10） Consistent with all polymers
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 4 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 4 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.93 Å
8UMY Atomic model of the human CTF18-RFC-PCNA-DNA ternary complex with narrow PCNA opening state II (state 6) Deposited 2023-10-18 Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric（10） Consistent with all polymers
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 4 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 4 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.83 Å
8UN0 Atomic model of the human CTF18-RFC-PCNA-DNA ternary complex with cracked and closed PCNA (state 7) Deposited 2023-10-18 Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric（10） Consistent with all polymers
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 4 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 4 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
8UNJ Atomic model of the human CTF18-RFC alone in the apo state (State 1) Deposited 2023-10-19 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain E 1–356（356 aa）
Not recorded MG MAGNESIUM ION × 3 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 3 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.35 Å
8ZWO Structure of CTF18-PCNA with ATP Deposited 2024-06-13 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 1–356（356 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；50 mM Tris-HCl, 200 mM NaCl, 1 mM DTT
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.99 Å
9IIN Structure of CTF18-PCNA with ATP and Mg2+ Deposited 2024-06-20 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 1–356（356 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 3 MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；50 mM Tris-HCl, 200 mM NaCl, 1 mM DTT
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å
9UIQ Structure of CTF18-PCNA with ATP Deposited 2025-04-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 1–349（349 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 3 MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；50 mM Tris-HCl, 200 mM NaCl, 1 mM DTT
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 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.