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Cryo-EM structure of the yeast TOM core complex (from TOM-TIM23 complex)

Electron Microscopy
4.4Å resolution
PDB entry 8w5j coloured by chain, front view.
PDB entry 8w5j coloured by chain, side view.
PDB entry 8w5j coloured by chain, top view.
Source organism: Saccharomyces cerevisiae S288C
Assembly composition:
hetero decamer (preferred)
Entry contents: 5 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Mitochondrial import receptor
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Multimeric state: hetero decamer
Accessible surface area: 55225.7 Å2
Buried surface area: 13526.24 Å2
Dissociation area: 1,203.52 Å2
Dissociation energy (ΔGdiss): 4.07 kcal/mol
Dissociation entropy (TΔSdiss): 20.68 kcal/mol
Symmetry number: 2
PDBe Complex ID: PDB-CPX-150030

Macromolecules

Mitochondrial import receptor subunit TOM40
Chains: A, I
Length: 387 amino acids
Theoretical weight: 42.07 KDa
Source organism: Saccharomyces cerevisiae S288C
Expression system: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P23644 (Residues: 1-387; Coverage: 100%)
Gene names: ISP42, MOM38, TOM40, YM8325.04, YMR203W
Pfam: Eukaryotic porin
Mitochondrial import receptor subunit TOM40 in PDB entry 8w5j, assembly 1, front view.
Mitochondrial import receptor subunit TOM40 in PDB entry 8w5j, assembly 1, side view.
Mitochondrial import receptor subunit TOM40 in PDB entry 8w5j, assembly 1, top view.
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Mitochondrial import receptor subunit TOM22
Chains: B, J
Length: 152 amino acids
Theoretical weight: 16.8 KDa
Source organism: Saccharomyces cerevisiae S288C
Expression system: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P49334 (Residues: 1-152; Coverage: 100%)
Gene names: MAS17, MAS22, MOM22, N1217, N1862, TOM22, YNL131W
Pfam: Mitochondrial import receptor subunit Tom22
Mitochondrial import receptor subunit TOM22 in PDB entry 8w5j, assembly 1, front view.
Mitochondrial import receptor subunit TOM22 in PDB entry 8w5j, assembly 1, side view.
Mitochondrial import receptor subunit TOM22 in PDB entry 8w5j, assembly 1, top view.
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Mitochondrial import receptor subunit TOM5
Chains: C, K
Length: 50 amino acids
Theoretical weight: 5.99 KDa
Source organism: Saccharomyces cerevisiae S288C
Expression system: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P80967 (Residues: 1-50; Coverage: 100%)
Gene names: MOM8A, TOM5, YPR133W-A
Pfam: Mitochondrial import receptor subunit or translocase
Mitochondrial import receptor subunit TOM5 in PDB entry 8w5j, assembly 1, front view.
Mitochondrial import receptor subunit TOM5 in PDB entry 8w5j, assembly 1, side view.
Mitochondrial import receptor subunit TOM5 in PDB entry 8w5j, assembly 1, top view.
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Mitochondrial import receptor subunit TOM6
Chains: D, L
Length: 61 amino acids
Theoretical weight: 6.41 KDa
Source organism: Saccharomyces cerevisiae S288C
Expression system: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P33448 (Residues: 1-61; Coverage: 100%)
Gene names: ISP6, TOM6, YOR045W
Pfam: Mitochondrial import receptor subunit Tom6, fungal
Mitochondrial import receptor subunit TOM6 in PDB entry 8w5j, assembly 1, front view.
Mitochondrial import receptor subunit TOM6 in PDB entry 8w5j, assembly 1, side view.
Mitochondrial import receptor subunit TOM6 in PDB entry 8w5j, assembly 1, top view.
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Mitochondrial import receptor subunit TOM7
Chains: E, M
Length: 60 amino acids
Theoretical weight: 6.88 KDa
Source organism: Saccharomyces cerevisiae S288C
Expression system: Saccharomyces cerevisiae S288C
UniProt:
  • Canonical: P53507 (Residues: 1-60; Coverage: 100%)
Gene names: MOM7, N2378, TOM7, YNL070W
Pfam: TOM7 family
Mitochondrial import receptor subunit TOM7 in PDB entry 8w5j, assembly 1, front view.
Mitochondrial import receptor subunit TOM7 in PDB entry 8w5j, assembly 1, side view.
Mitochondrial import receptor subunit TOM7 in PDB entry 8w5j, assembly 1, top view.
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