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Structure of GldLM, the proton-powered motor that drives Type IX protein secretion and gliding motility in Sphingobacterium wenxiniae

Electron Microscopy
3Å resolution
PDB entry 7sax coloured by chain, front view.
PDB entry 7sax coloured by chain, side view.
PDB entry 7sax coloured by chain, top view.
Source organism: Sphingobacterium wenxiniae
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: Gliding motility-associated protein GldL and Gliding motility-associated protein GldM
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Multimeric state: hetero heptamer
Accessible surface area: 29866.69 Å2
Buried surface area: 17457.6 Å2
Dissociation area: 1,818.98 Å2
Dissociation energy (ΔGdiss): 25.63 kcal/mol
Dissociation entropy (TΔSdiss): 11.36 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-103480

Macromolecules

Gliding motility-associated protein GldM
Chains: A, B
Length: 263 amino acids
Theoretical weight: 28.53 KDa
Source organism: Sphingobacterium wenxiniae
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: A0A1I6R6I5 (Residues: 1-224; Coverage: 44%)
Gene name: SAMN05660206_103134
Pfam: GldM N-terminal domain
InterPro: Gliding motility-associated protein GldM, N-terminal
Gliding motility-associated protein GldM in PDB entry 7sax, assembly 1, front view.
Gliding motility-associated protein GldM in PDB entry 7sax, assembly 1, side view.
Gliding motility-associated protein GldM in PDB entry 7sax, assembly 1, top view.
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Gliding motility-associated protein GldL
Chains: C, D, E, F, G
Length: 212 amino acids
Theoretical weight: 23.07 KDa
Source organism: Sphingobacterium wenxiniae
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: A0A1I6R6J4 (Residues: 1-212; Coverage: 100%)
Gene name: SAMN05660206_103135
Pfam: GldL N-terminal domain
InterPro: Gliding motility-associated protein, GldL
Gliding motility-associated protein GldL in PDB entry 7sax, assembly 1, front view.
Gliding motility-associated protein GldL in PDB entry 7sax, assembly 1, side view.
Gliding motility-associated protein GldL in PDB entry 7sax, assembly 1, top view.
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