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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：Q9Y6H6 New Search
4PDB entries
4Biological assembly
13chain/assembly records
Main Difference Dimensions in This Set
Different assembly state Different ligand/ion Different experimental method 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
2NDJ Structural Basis for KCNE3 and Estrogen Modulation of the KCNQ1 Channel Deposited 2016-06-09 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–103（103 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 6.5；313 K
NMR sample composition 0.8 mM [U-100% 13C; U-100% 15N; U-80% 2H] protein, 90% H2O/10% D2O | 90% H2O/10% D2O
Resolution not provided
6V00 structure of human KCNQ1-KCNE3-CaM complex Deposited 2019-11-16 Assembly 1 Insufficient information Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain C 1–103（103 aa）
Chain F 1–103（103 aa）
Chain I 1–103（103 aa）
Chain L 1–103（103 aa）
Not recorded CA CALCIUM ION × 8 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
6V01 structure of human KCNQ1-KCNE3-CaM complex with PIP2 Deposited 2019-11-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain C 1–103（103 aa）
Chain F 1–103（103 aa）
Chain I 1–103（103 aa）
Chain L 1–103（103 aa）
Not recorded CA CALCIUM ION × 8 PT5 [(2R)-1-octadecanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phospho ryl]oxy-propan-2-yl] (8Z)-icosa-5,8,11,14-tetraenoate × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.90 Å
9WD8 structure of human KCNQ1-KCNE3-CaM complex with two PIP2 Deposited 2025-08-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain C 1–103（103 aa）
Chain F 1–103（103 aa）
Chain I 1–103（103 aa）
Chain L 1–103（103 aa）
Not recorded CA CALCIUM ION × 8 A1BBG (2R)-3-{[(S)-hydroxy{[(1R,2R,3S,4R,5R,6S)-2,3,6-trihydroxy-4,5-bis(phosphonooxy)cyclohexyl]oxy}phosphoryl]oxy}propane-1,2-diyl di[(9Z)-octadec-9-enoate] × 8 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.90 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.