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REFINED 1.8 ANGSTROM CRYSTAL STRUCTURE OF THE LAMBDA REPRESSOR-OPERATOR COMPLEX

X-ray diffraction
1.8Å resolution
PDB entry 1lmb coloured by chain, front view.
PDB entry 1lmb coloured by chain, side view.
PDB entry 1lmb 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: 14311.57 Å2
Buried surface area: 6315.68 Å2
Dissociation area: 1,564.65 Å2
Dissociation energy (ΔGdiss): 27.58 kcal/mol
Dissociation entropy (TΔSdiss): 11.71 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-114142

Macromolecules

Repressor protein cI
Chains: 3, 4
Length: 92 amino acids
Theoretical weight: 10.14 KDa
Source organism: Escherichia virus Lambda
UniProt:
  • Canonical: P03034 (Residues: 2-93; Coverage: 39%)
Gene names: cI, lambdap88
Pfam: Helix-turn-helix
InterPro:
CATH: lambda repressor-like DNA-binding domains
SCOP: Phage repressors
Repressor protein cI in PDB entry 1lmb, assembly 1, front view.
Repressor protein cI in PDB entry 1lmb, assembly 1, side view.
Repressor protein cI in PDB entry 1lmb, assembly 1, top view.
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DNA chain 1
Name: DNA (5'-D(*AP*AP*TP*AP*CP*CP*AP*CP*TP*GP*GP*CP*GP*GP*TP*GP*A P*TP*AP*T)-3')
Representative chains: 1
Source organism: Lambdavirus lambda [10710]
Expression system: Not provided
Length: 20 nucleotides
Theoretical weight: 6.16 KDa
DNA (5'-D(*AP*AP*TP*AP*CP*CP*AP*CP*TP*GP*GP*CP*GP*GP*TP*GP*A P*TP*AP*T)-3') in PDB entry 1lmb, assembly 1, front view.
DNA (5'-D(*AP*AP*TP*AP*CP*CP*AP*CP*TP*GP*GP*CP*GP*GP*TP*GP*A P*TP*AP*T)-3') in PDB entry 1lmb, assembly 1, side view.
DNA (5'-D(*AP*AP*TP*AP*CP*CP*AP*CP*TP*GP*GP*CP*GP*GP*TP*GP*A P*TP*AP*T)-3') in PDB entry 1lmb, assembly 1, top view.
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DNA chain 2
Name: DNA (5'-D(*TP*AP*TP*AP*TP*CP*AP*CP*CP*GP*CP*CP*AP*GP*TP*GP*G P*TP*AP*T)-3')
Representative chains: 2
Source organism: Lambdavirus lambda [10710]
Expression system: Not provided
Length: 20 nucleotides
Theoretical weight: 6.11 KDa
DNA (5'-D(*TP*AP*TP*AP*TP*CP*AP*CP*CP*GP*CP*CP*AP*GP*TP*GP*G P*TP*AP*T)-3') in PDB entry 1lmb, assembly 1, front view.
DNA (5'-D(*TP*AP*TP*AP*TP*CP*AP*CP*CP*GP*CP*CP*AP*GP*TP*GP*G P*TP*AP*T)-3') in PDB entry 1lmb, assembly 1, side view.
DNA (5'-D(*TP*AP*TP*AP*TP*CP*AP*CP*CP*GP*CP*CP*AP*GP*TP*GP*G P*TP*AP*T)-3') in PDB entry 1lmb, assembly 1, top view.
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