X-ray diffraction
1.7Å resolution

Structure of a Dimeric Lac Repressor with C-terminal Deletion and K84L Substitution


Function and Biology Details

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Entry contents:
1 distinct polypeptide molecule
Lactose operon repressor Chain: A
Molecule details ›
Chain: A
Length: 349 amino acids
Theoretical weight: 37.43 KDa
Source organism: Escherichia coli
Expression system: Escherichia coli
  • Canonical: P03023 (Residues: 1-349; Coverage: 97%)
Gene names: JW0336, b0345, lacI
Sequence domains:
Structure domains: Rossmann fold

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X25
Spacegroup: I4122
Unit cell:
a: 87.007Å b: 87.007Å c: 224.098Å
α: 90° β: 90° γ: 90°
R R work R free
0.223 0.223 0.241
Expression system: Escherichia coli