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Crystal Structure of an outward-facing MBP-Maltose transporter complex bound to ADP-AlF4

X-ray diffraction
2.3Å resolution
PDB entry 3puw coloured by chain, front view.
PDB entry 3puw coloured by chain, side view.
PDB entry 3puw coloured by chain, top view.
Source organism: Escherichia coli K-12
Assembly composition:
hetero pentamer (preferred)
Entry contents: 4 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Maltose ABC transporter complex
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Multimeric state: hetero pentamer
Accessible surface area: 76094.7 Å2
Buried surface area: 31416.15 Å2
Dissociation area: 3,106.62 Å2
Dissociation energy (ΔGdiss): 6.46 kcal/mol
Dissociation entropy (TΔSdiss): 15.27 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-136373
Complex Portal ID: CPX-1932

Macromolecules

Maltose/maltodextrin-binding periplasmic protein
Chain: E
Length: 378 amino acids
Theoretical weight: 41.62 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli
UniProt:
  • Canonical: P0AEX9 (Residues: 27-396; Coverage: 100%)
Gene names: JW3994, b4034, malE
Pfam: Bacterial extracellular solute-binding protein
InterPro:
CATH: Periplasmic binding protein-like II
Maltose/maltodextrin-binding periplasmic protein in PDB entry 3puw, assembly 1, front view.
Maltose/maltodextrin-binding periplasmic protein in PDB entry 3puw, assembly 1, side view.
Maltose/maltodextrin-binding periplasmic protein in PDB entry 3puw, assembly 1, top view.
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Maltose/maltodextrin transport system permease protein MalF
Chain: F
Length: 514 amino acids
Theoretical weight: 57.05 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli
UniProt:
  • Canonical: P02916 (Residues: 1-514; Coverage: 100%)
Gene names: JW3993, b4033, malF
Pfam:
InterPro:
CATH:
Maltose/maltodextrin transport system permease protein MalF in PDB entry 3puw, assembly 1, front view.
Maltose/maltodextrin transport system permease protein MalF in PDB entry 3puw, assembly 1, side view.
Maltose/maltodextrin transport system permease protein MalF in PDB entry 3puw, assembly 1, top view.
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Maltose/maltodextrin transport system permease protein MalG
Chain: G
Length: 296 amino acids
Theoretical weight: 32.25 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli
UniProt:
  • Canonical: P68183 (Residues: 1-296; Coverage: 100%)
Gene names: JW3992, b4032, malG
Pfam: Binding-protein-dependent transport system inner membrane component
InterPro:
CATH: MetI-like
Maltose/maltodextrin transport system permease protein MalG in PDB entry 3puw, assembly 1, front view.
Maltose/maltodextrin transport system permease protein MalG in PDB entry 3puw, assembly 1, side view.
Maltose/maltodextrin transport system permease protein MalG in PDB entry 3puw, assembly 1, top view.
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Maltose/maltodextrin import ATP-binding protein MalK
Chains: A, B
Length: 381 amino acids
Theoretical weight: 42.18 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli
UniProt:
  • Canonical: P68187 (Residues: 1-371; Coverage: 100%)
Gene names: JW3995, b4035, malK
Pfam:
InterPro:
CATH:
Maltose/maltodextrin import ATP-binding protein MalK in PDB entry 3puw, assembly 1, front view.
Maltose/maltodextrin import ATP-binding protein MalK in PDB entry 3puw, assembly 1, side view.
Maltose/maltodextrin import ATP-binding protein MalK in PDB entry 3puw, assembly 1, top view.
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