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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：P02607 New Search
8PDB entries
16Biological assembly
24chain/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
1BR1 SMOOTH MUSCLE MYOSIN MOTOR DOMAIN-ESSENTIAL LIGHT CHAIN COMPLEX WITH MGADP.ALF4 BOUND AT THE ACTIVE SITE Deposited 1998-08-26 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–150（150 aa） Fragment：CHAINS A, C, E, G, MOTOR DOMAIN, CHAINS B, D, F, H, ESSENTIAL LIGHT
Not recorded MG MAGNESIUM ION × 1 ALF TETRAFLUOROALUMINATE ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.2；277 K；1.8M AMMONIUM SULFATE 100MM HEPES PH 7.2 2MM MGADP 2MM AL(NO3)3 8MM NAF PROTEIN CONCENTRATION: 10MG/ML TEMPERATURE: 4 DEGREES CENTIGRADE, temperature 277K
Resolution 3.50 Å R-free 0.305
1BR1 SMOOTH MUSCLE MYOSIN MOTOR DOMAIN-ESSENTIAL LIGHT CHAIN COMPLEX WITH MGADP.ALF4 BOUND AT THE ACTIVE SITE Deposited 1998-08-26 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–150（150 aa） Fragment：CHAINS A, C, E, G, MOTOR DOMAIN, CHAINS B, D, F, H, ESSENTIAL LIGHT
Not recorded MG MAGNESIUM ION × 1 ALF TETRAFLUOROALUMINATE ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.2；277 K；1.8M AMMONIUM SULFATE 100MM HEPES PH 7.2 2MM MGADP 2MM AL(NO3)3 8MM NAF PROTEIN CONCENTRATION: 10MG/ML TEMPERATURE: 4 DEGREES CENTIGRADE, temperature 277K
Resolution 3.50 Å R-free 0.305
1BR1 SMOOTH MUSCLE MYOSIN MOTOR DOMAIN-ESSENTIAL LIGHT CHAIN COMPLEX WITH MGADP.ALF4 BOUND AT THE ACTIVE SITE Deposited 1998-08-26 Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain F 1–150（150 aa） Fragment：CHAINS A, C, E, G, MOTOR DOMAIN, CHAINS B, D, F, H, ESSENTIAL LIGHT
Not recorded MG MAGNESIUM ION × 1 ALF TETRAFLUOROALUMINATE ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.2；277 K；1.8M AMMONIUM SULFATE 100MM HEPES PH 7.2 2MM MGADP 2MM AL(NO3)3 8MM NAF PROTEIN CONCENTRATION: 10MG/ML TEMPERATURE: 4 DEGREES CENTIGRADE, temperature 277K
Resolution 3.50 Å R-free 0.305
1BR1 SMOOTH MUSCLE MYOSIN MOTOR DOMAIN-ESSENTIAL LIGHT CHAIN COMPLEX WITH MGADP.ALF4 BOUND AT THE ACTIVE SITE Deposited 1998-08-26 Assembly 4 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain H 1–150（150 aa） Fragment：CHAINS A, C, E, G, MOTOR DOMAIN, CHAINS B, D, F, H, ESSENTIAL LIGHT
Not recorded MG MAGNESIUM ION × 1 ALF TETRAFLUOROALUMINATE ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.2；277 K；1.8M AMMONIUM SULFATE 100MM HEPES PH 7.2 2MM MGADP 2MM AL(NO3)3 8MM NAF PROTEIN CONCENTRATION: 10MG/ML TEMPERATURE: 4 DEGREES CENTIGRADE, temperature 277K
Resolution 3.50 Å R-free 0.305
1BR4 SMOOTH MUSCLE MYOSIN MOTOR DOMAIN-ESSENTIAL LIGHT CHAIN COMPLEX WITH MGADP.BEF3 BOUND AT THE ACTIVE SITE Deposited 1998-08-27 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–150（150 aa） Fragment：CHAINS A, C, E, G, MOTOR DOMAIN, CHAINS B, D, F, H, ESSENTIAL LIGHT
Not recorded MG MAGNESIUM ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 BEF BERYLLIUM TRIFLUORIDE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.2；277 K；1.8M AMMONIUM SULFATE 100MM HEPES PH 7.2 2MM MGADP 2MM AL(NO3)3 8MM NAF PROTEIN CONCENTRATION: 10MG/ML TEMPERATURE: 4 DEGREES CENTIGRADE, temperature 277K
Resolution 3.62 Å R-free 0.352
1BR4 SMOOTH MUSCLE MYOSIN MOTOR DOMAIN-ESSENTIAL LIGHT CHAIN COMPLEX WITH MGADP.BEF3 BOUND AT THE ACTIVE SITE Deposited 1998-08-27 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–150（150 aa） Fragment：CHAINS A, C, E, G, MOTOR DOMAIN, CHAINS B, D, F, H, ESSENTIAL LIGHT
Not recorded MG MAGNESIUM ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 BEF BERYLLIUM TRIFLUORIDE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.2；277 K；1.8M AMMONIUM SULFATE 100MM HEPES PH 7.2 2MM MGADP 2MM AL(NO3)3 8MM NAF PROTEIN CONCENTRATION: 10MG/ML TEMPERATURE: 4 DEGREES CENTIGRADE, temperature 277K
Resolution 3.62 Å R-free 0.352
1BR4 SMOOTH MUSCLE MYOSIN MOTOR DOMAIN-ESSENTIAL LIGHT CHAIN COMPLEX WITH MGADP.BEF3 BOUND AT THE ACTIVE SITE Deposited 1998-08-27 Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain F 1–150（150 aa） Fragment：CHAINS A, C, E, G, MOTOR DOMAIN, CHAINS B, D, F, H, ESSENTIAL LIGHT
Not recorded MG MAGNESIUM ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 BEF BERYLLIUM TRIFLUORIDE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.2；277 K；1.8M AMMONIUM SULFATE 100MM HEPES PH 7.2 2MM MGADP 2MM AL(NO3)3 8MM NAF PROTEIN CONCENTRATION: 10MG/ML TEMPERATURE: 4 DEGREES CENTIGRADE, temperature 277K
Resolution 3.62 Å R-free 0.352
1BR4 SMOOTH MUSCLE MYOSIN MOTOR DOMAIN-ESSENTIAL LIGHT CHAIN COMPLEX WITH MGADP.BEF3 BOUND AT THE ACTIVE SITE Deposited 1998-08-27 Assembly 4 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain H 1–150（150 aa） Fragment：CHAINS A, C, E, G, MOTOR DOMAIN, CHAINS B, D, F, H, ESSENTIAL LIGHT
Not recorded MG MAGNESIUM ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 BEF BERYLLIUM TRIFLUORIDE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.2；277 K；1.8M AMMONIUM SULFATE 100MM HEPES PH 7.2 2MM MGADP 2MM AL(NO3)3 8MM NAF PROTEIN CONCENTRATION: 10MG/ML TEMPERATURE: 4 DEGREES CENTIGRADE, temperature 277K
Resolution 3.62 Å R-free 0.352
3DTP Tarantula heavy meromyosin obtained by flexible docking to Tarantula muscle thick filament Cryo-EM 3D-MAP Deposited 2008-07-15 Assembly 1 Insufficient information Heteromer；Protein × 216 PDB declaration: 216-meric（216） Consistent with protein count
Chain C 2–151（150 aa）
Chain D 2–151（150 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer 100mM NaCl, 3mM MgCl2, 1mM EGTA, 5mM PIPES, 5mM NaH2PO4, 1mM NaN3；pH 7；100mM NaCl, 3mM MgCl2, 1mM EGTA, 5mM PIPES, 5mM NaH2PO4, 1mM NaN3
cryo-EM vitrification conditions Plunging in a liquid ethane. Blotting was performed from one side of the grid till a thin sample film on it using Whatman No 42 filter paper, then the grid was immediately plunged under gravity into liquid ethane cooled by liquid nitrogen. Grids were stored under liquid nitrogen.
Resolution 20.00 Å
3DTP Tarantula heavy meromyosin obtained by flexible docking to Tarantula muscle thick filament Cryo-EM 3D-MAP Deposited 2008-07-15 Assembly 2 Insufficient information Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain C 2–151（150 aa）
Chain D 2–151（150 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer 100mM NaCl, 3mM MgCl2, 1mM EGTA, 5mM PIPES, 5mM NaH2PO4, 1mM NaN3；pH 7；100mM NaCl, 3mM MgCl2, 1mM EGTA, 5mM PIPES, 5mM NaH2PO4, 1mM NaN3
cryo-EM vitrification conditions Plunging in a liquid ethane. Blotting was performed from one side of the grid till a thin sample film on it using Whatman No 42 filter paper, then the grid was immediately plunged under gravity into liquid ethane cooled by liquid nitrogen. Grids were stored under liquid nitrogen.
Resolution 20.00 Å
3DTP Tarantula heavy meromyosin obtained by flexible docking to Tarantula muscle thick filament Cryo-EM 3D-MAP Deposited 2008-07-15 Assembly 3 Insufficient information Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain C 2–151（150 aa）
Chain D 2–151（150 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer 100mM NaCl, 3mM MgCl2, 1mM EGTA, 5mM PIPES, 5mM NaH2PO4, 1mM NaN3；pH 7；100mM NaCl, 3mM MgCl2, 1mM EGTA, 5mM PIPES, 5mM NaH2PO4, 1mM NaN3
cryo-EM vitrification conditions Plunging in a liquid ethane. Blotting was performed from one side of the grid till a thin sample film on it using Whatman No 42 filter paper, then the grid was immediately plunged under gravity into liquid ethane cooled by liquid nitrogen. Grids were stored under liquid nitrogen.
Resolution 20.00 Å
3J04 EM structure of the heavy meromyosin subfragment of Chick smooth muscle Myosin with regulatory light chain in phosphorylated state Deposited 2011-02-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain C 4–151（148 aa） Fragment：S-1 SUBFRAGMENT
Chain F 4–151（148 aa） Fragment：S-1 SUBFRAGMENT
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.8；1 mM Mg, 20 mM phosphate, 1 mM ATP, 1 mM EGTA, 7-10% polyethylene glycol 6000, 90-120 mM NaCl
cryo-EM vitrification conditions Blot for 4 sec before plunging；Cryogen ETHANE；Carried out in cold room at 4 degrees C
X-ray crystallization conditions pH 7.8；pH 7.8
Resolution 20.00 Å
7MF3 Structure of the autoinhibited state of smooth muscle myosin-2 Deposited 2021-04-08 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain C 2–151（150 aa）
Chain F 2–151（150 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 2 PO4 PHOSPHATE ION × 2 MG MAGNESIUM ION × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.3；150 mM NaCl, 1mM EGTA, 2mM MgCl2
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å
8SYF Homology model of Acto-HMM complex in ADP-state. Chicken smooth muscle HMM and chicken pectoralis actin Deposited 2023-05-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain E 4–151（148 aa）
Chain H 4–151（148 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE
Resolution 19.00 Å
9SYU shutdown state non-muscle myosin 2A heads region Deposited 2025-10-14 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain C 1–151（151 aa）
Chain D 1–151（151 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 2 PO4 PHOSPHATE ION × 2 MG MAGNESIUM ION × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2；140 mM KCl, 10 mM MOPS pH 7.2, 0.1 mM EGTA, 2 mM MgCl2, 1 mM ATP. 1 mM Bissulfosuccinimidyl suberate
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.98 Å
9SZR shutdown state non-muscle myosin 2A heads region Deposited 2025-10-15 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain C 1–151（151 aa）
Chain D 1–151（151 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 2 PO4 PHOSPHATE ION × 2 MG MAGNESIUM ION × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2；140 mM KCl, 10 mM MOPS pH 7.2, 0.1 mM EGTA, 2 mM MgCl2, 1 mM ATP. 1 mM Bissulfosuccinimidyl suberate
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 6.30 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.