PDBe 4zyr

X-ray diffraction
3.31Å resolution

Crystal structure of E. coli Lactose permease G46W/G262W bound to p-nitrophenyl alpha-D-galactopyranoside (alpha-NPG)


Function and Biology Details

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Lactose permease Chains: A, B
Molecule details ›
Chains: A, B
Length: 417 amino acids
Theoretical weight: 46.79 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli
  • Canonical: P02920 (Residues: 1-417; Coverage: 100%)
Gene names: JW0334, b0343, lacY
Sequence domains: LacY proton/sugar symporter
Structure domains: MFS general substrate transporter like domains

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ALS BEAMLINE 8.3.1
Spacegroup: C2221
Unit cell:
a: 103.15Å b: 121.99Å c: 266.09Å
α: 90° β: 90° γ: 90°
R R work R free
0.26 0.259 0.278
Expression system: Escherichia coli