1NQI

crystal structure of lactose synthase, a 1:1 complex between beta1,4-galactosyltransferase and alpha-lactalbumin in the presence of GlcNAc


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.0 Å
  • R-Value Free: 0.258
  • R-Value Work: 0.210

Literature

Macromolecules
Sequence Display for 1NQI

Classification: TRANSFERASE ACTIVATOR / TRANSFERASE

Total Structure Weight: 94258.23

Macromolecule Entities
Molecule Chains Length Organism Details
ALPHA-LACTALBUMIN A, C 123 Mus musculus Fragment: REGULATORY SUBUNIT OF LACTOSE SYNTHASE
Details: CHAINS A AND B FORM FIRST, C AND D SECOND LACTOSE SYNTHASE COMPLEX
Gene Name(s): Lalba
Metabolic Pathways
Maps:       
Reactions:
ESCHER  BiGG
BETA-1,4-GALACTOSYLTRANSFERASE B, D 286 Bos taurus Fragment: CATALYTIC DOMAIN, RESIDUES 130-402
Details: CHAINS A AND B FORM FIRST, C AND D SECOND LACTOSE SYNTHASE COMPLEX
Gene Name(s): B4GALT1 Gene View GALT Gene View GGTB2
Metabolic Pathways
Maps:       
Reactions:
ESCHER  BiGG

Small Molecules
Ligands 2 Unique
ID Chains Name / Formula / InChI Key 2D Diagram 3D Interactions
NAG
Query on NAG

B, D N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
Ligand Explorer NGL
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
CA
Query on CA

A, C CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Ligand Explorer NGL
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.0 Å
  • R-Value Free: 0.258
  • R-Value Work: 0.210
  • Space Group: P 1 21 1

Unit Cell:

Length (Å) Angle (°)
a = 57.16 α = 90.00
b = 96.38 β = 100.98
c = 99.48 γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History

Deposition Data

  • Deposited Date: 2003-01-21
  • Released Date: 2003-02-04
  • Deposition author(s): Ramakrishnan, B., Qasba, P.K.
  • Previous versions: 1J92

Revision History

  • 2011-07-13
    Type: Non-polymer description | Details: chemical name/synonym update
  • 2011-07-13
    Type: Version format compliance | Details: compliance with PDB Exchange Dictionary V4