← Back to search
3pn7

Visualizing new hinges and a potential major source of compliance in the lever arm of myosin

Method: X-RAY DIFFRACTION
▼

1. Protein Identity and Related Structures Protein Identity & Related Structures

Myosin heavy chain

OrganismNot specified

UniProt Q26080

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 3 Myosin regulatory light chain × 1 （Q26069） Myosin essential light chain × 1 （Q26066） MAGNESIUM ION × 1 CALCIUM ION × 1 water × 3 Consistent with protein count
2 Protein heterocomplex Heteromer Protein 3 Myosin regulatory light chain × 1 （Q26069） Myosin essential light chain × 1 （Q26066） MAGNESIUM ION × 1 CALCIUM ION × 1 water × 3 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
2os8 2otg 3pn7 3pn7 3ts5 3ts5 3tuy 3tuy

8 assemblies

View Construct and Data Evidence
UniProt name Q26080_PLAMG
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–69； UniProt 771–839 Author chain D； PDBConstruct 1–69； UniProt 771–839

Myosin regulatory light chain

OrganismNot specified

UniProt Q26069

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 3 Myosin heavy chain × 1 （Q26080） Myosin essential light chain × 1 （Q26066） MAGNESIUM ION × 1 CALCIUM ION × 1 water × 3 Consistent with protein count
2 Protein heterocomplex Heteromer Protein 3 Myosin heavy chain × 1 （Q26080） Myosin essential light chain × 1 （Q26066） MAGNESIUM ION × 1 CALCIUM ION × 1 water × 3 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
2ec6 3pn7 3pn7 3ts5 3ts5 3tuy 3tuy

7 assemblies

View Construct and Data Evidence
UniProt name Q26069_PLAMG
Isoform —
PDB entities 2
Chains and sequence ranges Author chain B； PDBConstruct 1–161； UniProt 2–162 Author chain E； PDBConstruct 1–161； UniProt 2–162

Myosin essential light chain

OrganismNot specified

UniProt Q26066

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 3 Myosin heavy chain × 1 （Q26080） Myosin regulatory light chain × 1 （Q26069） MAGNESIUM ION × 1 CALCIUM ION × 1 water × 3 Consistent with protein count
2 Protein heterocomplex Heteromer Protein 3 Myosin heavy chain × 1 （Q26080） Myosin regulatory light chain × 1 （Q26069） MAGNESIUM ION × 1 CALCIUM ION × 1 water × 3 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
2ec6 2os8 2otg 3pn7 3pn7 3ts5 3ts5 3tuy 3tuy

9 assemblies

View Construct and Data Evidence
UniProt name Q26066_PLAMG
Isoform —
PDB entities 3
Chains and sequence ranges Author chain C； PDBConstruct 1–156； UniProt 2–157 Author chain F； PDBConstruct 1–156； UniProt 2–157

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id3pn7
Deposition date deposition_date2010-11-18
Structure title titleVisualizing new hinges and a potential major source of compliance in the lever arm of myosin
Keywords keywordsalpha helix, muscle contraction, Calcium binding, Catch Muscle, PROTEIN BINDING; PROTEIN BINDING
Experimental Method methodX-RAY DIFFRACTION
▼

3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

3pn7__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3pn7__assembly_1__model_1 | I(q)

10-2 10-1 105 106 107 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

3pn7__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）28.72 Å
Rg (electron density)28.49 Å
Total Rg28.96 Å
Atom count2945
Residues361
Excluded volume52585 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 3pn7__assembly_1__model_1 trimeric （3） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 3pn7__assembly_2__model_1 trimeric （3） Success 4.1.3-1-20251215 (887e7ef) View Download
▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (6)

▼

6. Fold Classification (SCOP + CATH) 14 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd3pn7b_
Class classa — All alpha proteins
Fold Fold folda.39 — EF Hand-like
Superfamily Superfamily superfamilya.39.1 — EF-hand
Family Family familya.39.1.5 — Calmodulin-like
Domain ID domain_idd3pn7c_
Class classa — All alpha proteins
Fold Fold folda.39 — EF Hand-like
Superfamily Superfamily superfamilya.39.1 — EF-hand
Family Family familya.39.1.5 — Calmodulin-like
Domain ID domain_idd3pn7e_
Class classa — All alpha proteins
Fold Fold folda.39 — EF Hand-like
Superfamily Superfamily superfamilya.39.1 — EF-hand
Family Family familya.39.1.5 — Calmodulin-like
Domain ID domain_idd3pn7f_
Class classa — All alpha proteins
Fold Fold folda.39 — EF Hand-like
Superfamily Superfamily superfamilya.39.1 — EF-hand
Family Family familya.39.1.5 — Calmodulin-like

CATH v4.4 (10 domains)

Domain ID domain_id3pn7A00
Class class4 — Few Secondary Structures
Architecture architecture10 — Irregular
Topology topology270 — Myosin, subunit A
Homologous superfamily homologous superfamily10 — Myosin, subunit A
Domain ID domain_id3pn7B01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology238 — Recoverin; domain 1
Homologous superfamily homologous superfamily10 — EF-hand
Domain ID domain_id3pn7B02
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology238 — Recoverin; domain 1
Homologous superfamily homologous superfamily10 — EF-hand
Domain ID domain_id3pn7C01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology238 — Recoverin; domain 1
Homologous superfamily homologous superfamily10 — EF-hand
Domain ID domain_id3pn7C02
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology238 — Recoverin; domain 1
Homologous superfamily homologous superfamily10 — EF-hand
Domain ID domain_id3pn7D00
Class class4 — Few Secondary Structures
Architecture architecture10 — Irregular
Topology topology270 — Myosin, subunit A
Homologous superfamily homologous superfamily10 — Myosin, subunit A
Domain ID domain_id3pn7E01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology238 — Recoverin; domain 1
Homologous superfamily homologous superfamily10 — EF-hand
Domain ID domain_id3pn7E02
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology238 — Recoverin; domain 1
Homologous superfamily homologous superfamily10 — EF-hand
Domain ID domain_id3pn7F01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology238 — Recoverin; domain 1
Homologous superfamily homologous superfamily10 — EF-hand
Domain ID domain_id3pn7F02
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology238 — Recoverin; domain 1
Homologous superfamily homologous superfamily10 — EF-hand
▶

7. Citations (1)