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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：Q14028 New Search
11PDB entries
11Biological assembly
11chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification 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
7RH9 Cryo-EM structure of human rod CNGA1/B1 channel in apo state Deposited 2021-07-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 454–1251（798 aa） Fragment：UNP residues 454-1251
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.61 Å
7RHG Cryo-EM structure of human rod CNGA1/B1 channel in cAMP-bound state Deposited 2021-07-17 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 454–1251（798 aa） Fragment：UNP residues 454-1251
Not recorded CMP ADENOSINE-3',5'-CYCLIC-MONOPHOSPHATE × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.88 Å
7RHH Cryo-EM structure of human rod CNGA1/B1 channel in cGMP-bound openI state Deposited 2021-07-17 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 454–1251（798 aa） Fragment：UNP residues 454-1251
Not recorded PCG CYCLIC GUANOSINE MONOPHOSPHATE × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.31 Å
7RHI Cryo-EM structure of human rod CNGA1/B1 channel in cGMP-bound openII state Deposited 2021-07-17 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 454–1251（798 aa） Fragment：UNP residues 454-1251
Not recorded PCG CYCLIC GUANOSINE MONOPHOSPHATE × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.31 Å
7RHJ Cryo-EM structure of human rod CNGA1/B1 channel in L-cis-Diltiazem-blocked open state Deposited 2021-07-17 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 454–1251（798 aa） Fragment：UNP residues 454-1251
Not recorded PCG CYCLIC GUANOSINE MONOPHOSPHATE × 4 5H0 (2R,3R)-5-[2-(dimethylamino)ethyl]-2-(4-methoxyphenyl)-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepin-3-yl acetate × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.88 Å
7RHK Cryo-EM structure of human rod CNGA1/B1 channel in L-cis-Diltiazem-trapped closed state Deposited 2021-07-17 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 454–1251（798 aa） Fragment：UNP residues 454-1251
Not recorded PCG CYCLIC GUANOSINE MONOPHOSPHATE × 4 5H0 (2R,3R)-5-[2-(dimethylamino)ethyl]-2-(4-methoxyphenyl)-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepin-3-yl acetate × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.27 Å
7RHL Cryo-EM structure of human rod Apo CNGA1/B1 channel with CLZ coiled coil Deposited 2021-07-17 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 454–1251（798 aa） Fragment：UNP residues 454-1251
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.03 Å
8DGH NMR Structure of calmodulin bound to C-terminal site in the beta-subunit of cyclic nucleotide-gated channel Deposited 2022-06-23 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1128–1139（12 aa） Fragment：C-terminal site, residues 1128-1139
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；308 K；Ionic strength (raw mmCIF value) 1；Pressure 1
NMR sample composition 0.4 mM [U-100% 13C; U-100% 15N] Calmodulin, 1.2 mM Cyclic nucleotide-gated cation channel beta-1, 20 mM [U-100% 2H] TRIS, 1 mM Calcium chloride, 90% H2O/10% D2O | 90% H2O/10% D2O
NMR sample composition 0.4 mM [U-100% 13C; U-100% 15N] Calmodulin, 1.2 mM Cyclic nucleotide-gated cation channel beta-1, 20 mM [U-100% 2H] TRIS, 1 mM Calcium chloride, 100% D2O | 100% D2O
Resolution not provided
8DGK NMR structure of calmodulin bound to N-terminal site in the beta-subunit of cyclic nucleotide-gated channel Deposited 2022-06-23 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 565–576（12 aa） Fragment：N-terminal site, residues 565-576
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；308 K；Ionic strength (raw mmCIF value) 1；Pressure 1
NMR sample composition 0.5 mM [U-100% 13C; U-100% 15N] Calmodulin, 0.85 mM Cyclic nucleotide-gated cation channel beta-1, 20 mM [U-100% 2H] TRIS, 1 mM Calcium chloride, 90% H2O/10% D2O | 90% H2O/10% D2O
NMR sample composition 0.5 mM [U-100% 13C; U-100% 15N] Calmodulin, 0.85 mM Cyclic nucleotide-gated cation channel beta-1, 20 mM [U-100% 2H] TRIS, 1 mM Calcium chloride, 100% D2O | 100% D2O
NMR sample composition 0.5 mM [U-10% 13C; U-100% 15N] Calmodulin, 0.85 mM Cyclic nucleotide-gated cation channel beta-1, 20 mM [U-100% 2H] TRIS, 1 mM Calcium chloride, 100% D2O | 100% D2O
Resolution not provided
9UPF Cryo-EM structure of human olfactory CNG channel in cAMP-bound open state Deposited 2025-04-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain B 1–1251（1251 aa）
Not recorded CA CALCIUM ION × 2 CMP ADENOSINE-3',5'-CYCLIC-MONOPHOSPHATE × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.59 Å
9UPG Cryo-EM structure of human olfactory CNGA2/A4/B1 in CaM-bound closed state Deposited 2025-04-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain B 1–1251（1251 aa）
Not recorded CA CALCIUM ION × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.87 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.