6c1g

High-Resolution Cryo-EM Structures of Actin-bound Myosin States Reveal the Mechanism of Myosin Force Sensing

Method: ELECTRON MICROSCOPY Dmax: 193.7 Å Quality: GOOD

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

Unconventional myosin-Ib

OrganismNot specified

UniProt Q05096

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 7 PDB declaration: heptameric(7) Consistent with protein copy count Chain P; UniProt 6–728 Not recorded Calmodulin × 1 Actin, alpha skeletal muscle × 5 (P68135) MG MAGNESIUM ION × 6 ADP ADENOSINE-5'-DIPHOSPHATE × 6 ELECTRON MICROSCOPY cryo-EM buffer:pH 7 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.80 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

4 other PDB entries and 4 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name MYO1B_RAT
Isoform Q05096-2
PDB entities 1
Chains and sequence ranges Author chain P; PDBConstruct 1–723; UniProt 6–728

Actin, alpha skeletal muscle

OrganismNot specified

UniProt P68135

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 7 PDB declaration: heptameric(7) Consistent with protein copy count Chain A; UniProt 3–377 Chain B; UniProt 3–377 Chain C; UniProt 3–377 Chain D; UniProt 3–377 Chain E; UniProt 3–377 Not recorded Unconventional myosin-Ib × 1 (Q05096) Calmodulin × 1 MG MAGNESIUM ION × 6 ADP ADENOSINE-5'-DIPHOSPHATE × 6 ELECTRON MICROSCOPY cryo-EM buffer:pH 7 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.80 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

293 other PDB entries and 353 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name ACTS_RABIT
Isoform
PDB entities 3
Chains and sequence ranges Author chain A; PDBConstruct 1–375; UniProt 3–377 Author chain B; PDBConstruct 1–375; UniProt 3–377 Author chain C; PDBConstruct 1–375; UniProt 3–377 Author chain D; PDBConstruct 1–375; UniProt 3–377 Author chain E; PDBConstruct 1–375; UniProt 3–377

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.

SAXS scattering curve SAXS Profile

SAXS profile for 6c1g

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 6c1g
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2. Structure Basics 2. Structure Basics

Entry ID entry_id6c1g
Deposition date deposition_date2018-01-04
Structure title titleHigh-Resolution Cryo-EM Structures of Actin-bound Myosin States Reveal the Mechanism of Myosin Force Sensing
Keywords keywordsMechanochemistry, Mechanobiology, Structural Biology, Cytoskeleton, Molecular Motor, Myosin-I, STRUCTURAL PROTEIN; STRUCTURAL PROTEIN
Experimental Method methodELECTRON MICROSCOPY

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier55.72
Radius of gyration Rg (electron density) rg_electron54.42
Forward intensity I(0) i01379090000.00
Molecular weight molecular_weight299030.0 kDa
Excluded volume excluded_volume369500 ų
Envelope volume envelope_volume534650 ų
Hydration-shell volume shell_volume83389 ų
Envelope diameter envelope_diameter205.2
Shell Rg shell_rg54.03
Envelope Rg envelope_rg56.69
Shape Rg shape_rg54.56
Total Rg total_rg53.94
Total atoms total_atoms20994
Residues n_residues2752
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax193.7
Rg (real space) rg_real56.00
Rg uncertainty (real space) rg_real_error2.47
I(0) (real space) i0_real1.3790e+09
I(0) uncertainty (real space) i0_real_error3.1260e+07
Rg (reciprocal space) rg_reciprocal55.47
I(0) (reciprocal space) i0_reciprocal1378000000.0000
Solution quality estimate total_estimate0.8512
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary55.3
Skewness Skewness skewness0.439
Kurtosis Kurtosis kurtosis-0.335
Angular range angular_range— – 0.1400 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha87540000.0000
Real-space data points n_real_points29
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.827; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.937; Smooth: 0.647

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 22 domains

CATH v4.4 (22 domains)

Domain ID domain_id6c1gA01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily40 — ATPase, nucleotide binding domain
Domain ID domain_id6c1gA02
Class class2 — Mainly Beta
Architecture architecture30 — Roll
Topology topology36 — Actin; Chain A, domain 2
Homologous superfamily homologous superfamily70 — Actin; Chain A, domain 2
Domain ID domain_id6c1gA03
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily40 — ATPase, nucleotide binding domain
Domain ID domain_id6c1gA04
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology640 — Actin; Chain A, domain 4
Homologous superfamily homologous superfamily10 — ATPase, substrate binding domain, subdomain 4
Domain ID domain_id6c1gB01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily40 — ATPase, nucleotide binding domain
Domain ID domain_id6c1gB02
Class class2 — Mainly Beta
Architecture architecture30 — Roll
Topology topology36 — Actin; Chain A, domain 2
Homologous superfamily homologous superfamily70 — Actin; Chain A, domain 2
Domain ID domain_id6c1gB03
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily40 — ATPase, nucleotide binding domain
Domain ID domain_id6c1gB04
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology640 — Actin; Chain A, domain 4
Homologous superfamily homologous superfamily10 — ATPase, substrate binding domain, subdomain 4
Domain ID domain_id6c1gC01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily40 — ATPase, nucleotide binding domain
Domain ID domain_id6c1gC02
Class class2 — Mainly Beta
Architecture architecture30 — Roll
Topology topology36 — Actin; Chain A, domain 2
Homologous superfamily homologous superfamily70 — Actin; Chain A, domain 2
Domain ID domain_id6c1gC03
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily40 — ATPase, nucleotide binding domain
Domain ID domain_id6c1gC04
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology640 — Actin; Chain A, domain 4
Homologous superfamily homologous superfamily10 — ATPase, substrate binding domain, subdomain 4
Domain ID domain_id6c1gD01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily40 — ATPase, nucleotide binding domain
Domain ID domain_id6c1gD02
Class class2 — Mainly Beta
Architecture architecture30 — Roll
Topology topology36 — Actin; Chain A, domain 2
Homologous superfamily homologous superfamily70 — Actin; Chain A, domain 2
Domain ID domain_id6c1gD03
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily40 — ATPase, nucleotide binding domain
Domain ID domain_id6c1gD04
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology640 — Actin; Chain A, domain 4
Homologous superfamily homologous superfamily10 — ATPase, substrate binding domain, subdomain 4
Domain ID domain_id6c1gE01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily40 — ATPase, nucleotide binding domain
Domain ID domain_id6c1gE02
Class class2 — Mainly Beta
Architecture architecture30 — Roll
Topology topology36 — Actin; Chain A, domain 2
Homologous superfamily homologous superfamily70 — Actin; Chain A, domain 2
Domain ID domain_id6c1gE03
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily40 — ATPase, nucleotide binding domain
Domain ID domain_id6c1gE04
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology640 — Actin; Chain A, domain 4
Homologous superfamily homologous superfamily10 — ATPase, substrate binding domain, subdomain 4
Domain ID domain_id6c1gP01
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily4820
Domain ID domain_id6c1gR01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology238 — Recoverin; domain 1
Homologous superfamily homologous superfamily10 — EF-hand

8. Citations (1)

9. Files and Curves (10)