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Crystal Structure of the Lambda Repressor

X-ray diffraction
3.909Å resolution
PDB entry 3bdn coloured by chain, front view.
PDB entry 3bdn coloured by chain, side view.
PDB entry 3bdn coloured by chain, top view.
Source organism: Lambdavirus lambda
Assembly composition:
hetero tetramer (preferred)
Entry contents: 1 distinct polypeptide molecule
2 distinct DNA molecules

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Repressor protein cI and DNA
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Multimeric state: hetero tetramer
Accessible surface area: 30353.89 Å2
Buried surface area: 8949.96 Å2
Dissociation area: 1,472.68 Å2
Dissociation energy (ΔGdiss): 15.26 kcal/mol
Dissociation entropy (TΔSdiss): 12.55 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-116089

Macromolecules

Repressor protein cI
Chains: A, B
Length: 236 amino acids
Theoretical weight: 26.05 KDa
Source organism: Escherichia virus Lambda
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P03034 (Residues: 2-237; Coverage: 100%)
Gene names: cI, lambdap88
Pfam:
InterPro:
CATH:
Repressor protein cI in PDB entry 3bdn, assembly 1, front view.
Repressor protein cI in PDB entry 3bdn, assembly 1, side view.
Repressor protein cI in PDB entry 3bdn, assembly 1, top view.
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DNA chain C
Name: DNA (5'-D(*DAP*DAP*DTP*DAP*DCP*DCP*DAP*DCP*DTP*DGP*DGP*DCP*DGP*DGP*DTP*DGP*DAP*DTP*DAP*DT)-3')
Representative chains: C
Source organism: Lambdavirus lambda [10710]
Expression system: Not provided
Length: 20 nucleotides
Theoretical weight: 6.16 KDa
DNA (5'-D(*DAP*DAP*DTP*DAP*DCP*DCP*DAP*DCP*DTP*DGP*DGP*DCP*DGP*DGP*DTP*DGP*DAP*DTP*DAP*DT)-3') in PDB entry 3bdn, assembly 1, front view.
DNA (5'-D(*DAP*DAP*DTP*DAP*DCP*DCP*DAP*DCP*DTP*DGP*DGP*DCP*DGP*DGP*DTP*DGP*DAP*DTP*DAP*DT)-3') in PDB entry 3bdn, assembly 1, side view.
DNA (5'-D(*DAP*DAP*DTP*DAP*DCP*DCP*DAP*DCP*DTP*DGP*DGP*DCP*DGP*DGP*DTP*DGP*DAP*DTP*DAP*DT)-3') in PDB entry 3bdn, assembly 1, top view.
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DNA chain D
Name: DNA (5'-D(*DTP*DAP*DTP*DAP*DTP*DCP*DAP*DCP*DCP*DGP*DCP*DCP*DAP*DGP*DTP*DGP*DGP*DTP*DAP*DT)-3')
Representative chains: D
Source organism: Lambdavirus lambda [10710]
Expression system: Not provided
Length: 20 nucleotides
Theoretical weight: 6.11 KDa
DNA (5'-D(*DTP*DAP*DTP*DAP*DTP*DCP*DAP*DCP*DCP*DGP*DCP*DCP*DAP*DGP*DTP*DGP*DGP*DTP*DAP*DT)-3') in PDB entry 3bdn, assembly 1, front view.
DNA (5'-D(*DTP*DAP*DTP*DAP*DTP*DCP*DAP*DCP*DCP*DGP*DCP*DCP*DAP*DGP*DTP*DGP*DGP*DTP*DAP*DT)-3') in PDB entry 3bdn, assembly 1, side view.
DNA (5'-D(*DTP*DAP*DTP*DAP*DTP*DCP*DAP*DCP*DCP*DGP*DCP*DCP*DAP*DGP*DTP*DGP*DGP*DTP*DAP*DT)-3') in PDB entry 3bdn, assembly 1, top view.
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