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Cryo-EM structure of T7 bacteriophage DNA translocation gp15-gp16 core complex intermediate assembly

Electron Microscopy
3Å resolution
PDB entry 6yt5 coloured by chain, front view.
PDB entry 6yt5 coloured by chain, side view.
PDB entry 6yt5 coloured by chain, top view.
Source organism: Escherichia phage T7
Assembly composition:
hetero dodecamer (preferred)
Entry contents: 2 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Internal virion protein gp15 and Peptidoglycan transglycosylase gp16
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Multimeric state: hetero dodecamer
Accessible surface area: 206154.33 Å2
Buried surface area: 100232.56 Å2
Dissociation area: 22,683.75 Å2
Dissociation energy (ΔGdiss): 218.56 kcal/mol
Dissociation entropy (TΔSdiss): 91.07 kcal/mol
Symmetry number: 6
PDBe Complex ID: PDB-CPX-137236

Macromolecules

Internal virion protein gp15
Chains: A, B, C, D, E, F
Length: 782 amino acids
Theoretical weight: 88.38 KDa
Source organism: Escherichia phage T7
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P03725 (Residues: 1-747; Coverage: 100%)
Gene name: 15
InterPro: Internal virion protein Gp15
Internal virion protein gp15 in PDB entry 6yt5, assembly 1, front view.
Internal virion protein gp15 in PDB entry 6yt5, assembly 1, side view.
Internal virion protein gp15 in PDB entry 6yt5, assembly 1, top view.
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Peptidoglycan transglycosylase gp16
Chains: G, H, I, J, K, L
Length: 1340 amino acids
Theoretical weight: 146.69 KDa
Source organism: Escherichia phage T7
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P03726 (Residues: 1-1318; Coverage: 100%)
Gene name: 16
Pfam: Transglycosylase SLT domain
InterPro:
Peptidoglycan transglycosylase gp16 in PDB entry 6yt5, assembly 1, front view.
Peptidoglycan transglycosylase gp16 in PDB entry 6yt5, assembly 1, side view.
Peptidoglycan transglycosylase gp16 in PDB entry 6yt5, assembly 1, top view.
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