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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：Q9UBL9 New Search
18PDB entries
18Biological assembly
50chain/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
9DDV Cryo-EM structure of the human P2X2 receptor in the apo closed state Deposited 2024-08-28 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.71 Å
9DDW Cryo-EM structure of the human P2X2 receptor in conformation I of the ATP-bound desensitized state Deposited 2024-08-28 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.49 Å
9DDX Cryo-EM structure of the human P2X2 receptor in conformation II of the ATP-bound desensitized state Deposited 2024-08-28 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 43–361（319 aa）
Chain B 43–361（319 aa）
Chain C 43–361（319 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.55 Å
9OGH Human P2X2 apo structure in lipid nanodiscs Deposited 2025-04-30 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 POV (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate × 24 NA SODIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9OHK Human P2X2 receptor channel in lipid nanodiscs with 0.5mM Suramin Deposited 2025-05-05 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 SVR 8,8'-[CARBONYLBIS[IMINO-3,1-PHENYLENECARBONYLIMINO(4-METHYL-3,1-PHENYLENE)CARBONYLIMINO]]BIS-1,3,5-NAPHTHALENETRISULFON IC ACID × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å
9OIR Human P2X2 receptor channel in detergent with residual ATP Deposited 2025-05-06 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 3 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
9OJK The open state structure of human P2X2 receptor channel in lipid nanodiscs with free ATP and sodium Deposited 2025-05-07 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 3 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
9OM0 The pre-desensitized state structure of human P2X2 receptor channel in lipid nanodiscs with free ATP and sodium Deposited 2025-05-13 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 3 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.58 Å
9OMR The desensitized state structure of human P2X2 receptor channel in lipid nanodiscs with free ATP and sodium Deposited 2025-05-14 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.68 Å
9ON5 The pre-open state 1 structure of human P2X2 receptor channel in lipid nanodiscs with free ATP and sodium Deposited 2025-05-14 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
9ON6 The pre-open state 2 structure of human P2X2 receptor channel in lipid nanodiscs with free ATP and sodium Deposited 2025-05-14 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
9UWW Cryo-EM structure of the human P2X2 receptor in the apo closed state Deposited 2025-05-13 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 PG8 1,2-DIOCTANOYL-SN-GLYCERO-3-[PHOSPHO-RAC-(1-GLYCEROL) × 3 NA SODIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.19 Å
9UWX Cryo-EM structure of the human P2X2 receptor in the ATP-bound open state Deposited 2025-05-13 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.41 Å
9UWY Cryo-EM structure of the human P2X2 receptor in the ATP-bound desensitised state Deposited 2025-05-13 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–471（471 aa）
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.48 Å
9UX1 Cryo-EM structure of the human P2X2/3 heteromer receptor - class 1 (1:2) Deposited 2025-05-13 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.98 Å
9UX2 Cryo-EM structure of the human P2X2/3 heteromer receptor - class 2 (2:1) Deposited 2025-05-13 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 7 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.73 Å
9UX3 Cryo-EM structure of the human P2X2/3 heteromer receptor bound to AF-219 Deposited 2025-05-13 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain B 1–471（471 aa）
Chain C 1–471（471 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 7 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 AF9 5-[2,4-bis(azanyl)pyrimidin-5-yl]oxy-2-methoxy-4-propan-2-yl-benzenesulfonamide × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.64 Å
9Z32 The structure of short splice variant (Q9UBL9-2) of human P2X2 receptor channel in lipid nanodiscs with Mg-ATP Deposited 2025-11-05 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–404（404 aa）
Chain B 1–404（404 aa）
Chain C 1–404（404 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 ATP ADENOSINE-5'-TRIPHOSPHATE × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.83 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.