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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：Q15746 New Search
8PDB entries
10Biological assembly
10chain/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
2CQV Solution structure of the eighth Ig-like domain of human myosin light chain kinase Deposited 2005-05-20 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1238–1338（101 aa） Fragment：Immunoglobulin I-set domain
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；293 K；Ionic strength (raw mmCIF value) 120mM；Pressure ambient
NMR sample composition 1.64mM 13C, 15N-labeled protein; 20mM d-Tris-HCl (pH7.0); 100mM NaCl; 1mM DTT; 0.02% NaN3 | 90% H2O/10% D2O
Resolution not provided
2K0F Calmodulin complexed with calmodulin-binding peptide from smooth muscle myosin light chain kinase Deposited 2008-02-02 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1742–1760（19 aa）
Not recorded CA CALCIUM ION × 4 SOLUTION NMR mmCIF provides none of the parsed conditions Resolution not provided
2YR3 Solution structure of the fourth Ig-like domain from myosin light chain kinase, smooth muscle Deposited 2007-04-02 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 510–601（92 aa） Fragment：Ig domain
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；298 K；Ionic strength (raw mmCIF value) 120mM；Pressure ambient
NMR sample composition 1.13mM 13C, 15N-labeled protein; 20mM d-Tris-HCl (pH 7.0); 100mM NaCl; 1mM d-DTT; 0.02% NaN3; 90% H2O, 10% D2O | 90% H2O/10% D2O
Resolution not provided
5JQA CaM:RM20 complex Deposited 2016-05-04 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1691–1710（20 aa） Fragment：UNP residues 1691-1710
Non-standard monomer：Yes (specific site not provided by mmCIF) CA CALCIUM ION × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；295 K；0.1 M sodium acetate, pH 4.6, 25% w/v PEG4000
Resolution 1.80 Å R-free 0.188
5JTH Crystal structure of E67A calmodulin - CaM:RM20 analog complex Deposited 2016-05-09 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1691–1710（20 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) CA CALCIUM ION × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；295 K；0.1M Sodium Acetate pH 4.6, 25%(w/v) PEG 4000, 20mM CaCl2
Resolution 1.84 Å R-free 0.196
6C6M IgCam3 of human MLCK1 Deposited 2018-01-19 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 405–507（103 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；277 K；200mM ammonium dihydrogen phosphate, 20% PEG3350
Resolution 2.50 Å R-free 0.272
6C6M IgCam3 of human MLCK1 Deposited 2018-01-19 Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 405–507（103 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；277 K；200mM ammonium dihydrogen phosphate, 20% PEG3350
Resolution 2.50 Å R-free 0.272
6C6M IgCam3 of human MLCK1 Deposited 2018-01-19 Assembly 3 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain C 405–507（103 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；277 K；200mM ammonium dihydrogen phosphate, 20% PEG3350
Resolution 2.50 Å R-free 0.272
9MVW Crystal structure of S101F calmodulin - CaM:RM20 analog complex Deposited 2025-01-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1691–1710（20 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) CA CALCIUM ION × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.6；295 K；0.1M Sodium Acetate pH 4.6, 25%(w/v) PEG 4000, 20mM CaCl2
Resolution 1.58 Å R-free 0.237
9MXD Human E104A calmodulin:MLCK RM20 complex Deposited 2025-01-19 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1742–1761（20 aa）
Not recorded CA CALCIUM ION × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.6；293 K；0.1M Sodium Acetate pH 4.6, 25%(w/v) PEG 4000, 20mM CaCl2
Resolution 1.17 Å R-free 0.178

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.