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Structure of the F-actin-tropomyosin complex

Electron Microscopy
3.7Å resolution
PDB entry 3j8a coloured by chain, front view.
PDB entry 3j8a coloured by chain, side view.
PDB entry 3j8a coloured by chain, top view.
Source organisms:
Assembly composition:
hetero heptamer (preferred)
Entry contents: 2 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Actin, alpha skeletal muscle
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Multimeric state: hetero heptamer
Accessible surface area: 90099.02 Å2
Buried surface area: 19216.25 Å2
Dissociation area: 1,828.56 Å2
Dissociation energy (ΔGdiss): -15.17 kcal/mol
Dissociation entropy (TΔSdiss): 30.7 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-159328

Macromolecules

tropomyosin alpha-1
Chains: F, G
Length: 135 amino acids
Theoretical weight: 11.51 KDa
Source organism: Mus musculus
Expression system: Escherichia coli
tropomyosin alpha-1 in PDB entry 3j8a, assembly 1, front view.
tropomyosin alpha-1 in PDB entry 3j8a, assembly 1, side view.
tropomyosin alpha-1 in PDB entry 3j8a, assembly 1, top view.
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Actin, alpha skeletal muscle
Chains: A, B, C, D, E
Length: 375 amino acids
Theoretical weight: 41.88 KDa
Source organism: Oryctolagus cuniculus
UniProt:
  • Canonical: P68135 (Residues: 3-377; Coverage: 100%)
Gene names: ACTA, ACTA1
Pfam: Actin
InterPro:
CATH:
Actin, alpha skeletal muscle in PDB entry 3j8a, assembly 1, front view.
Actin, alpha skeletal muscle in PDB entry 3j8a, assembly 1, side view.
Actin, alpha skeletal muscle in PDB entry 3j8a, assembly 1, top view.
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