1NQF

OUTER MEMBRANE COBALAMIN TRANSPORTER (BTUB) FROM E. COLI, METHIONINE SUBSTIUTION CONSTRUCT FOR SE-MET SAD PHASING

Structural Biology Knowledgebase: 1NQF SBKB.org


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.288
  • R-Value Work: 0.244

Literature

Macromolecules
Sequence Display for 1NQF

Classification: TRANSPORT PROTEIN

Total Structure Weight: 68533.19

Macromolecule Entities
Molecule Chains Length Organism Details
Vitamin B12 receptor A 594 Escherichia coli Mutation: M293M, W317M, K319M, T321M, W516M, I518M, Y520M, M541M
Gene Name(s): btuB bfe cer dcrC b3966 JW3938
Metabolic Pathways
Maps:       
Reactions:
ESCHER  BiGG

Membrane Protein

Source: inferred by homology | Group: BETA-BARREL

Subgroup Name: Beta-Barrel Membrane Proteins: Monomeric/Dimeric

Protein Name: apo BtuB cobalamin transporter


Small Molecules
Ligands 2 Unique
ID Chains Name / Formula / InChI Key 2D Diagram 3D Interactions
C8E
Query on C8E

A (HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE
C16 H34 O5
FEOZZFHAVXYAMB-UHFFFAOYSA-N
Ligand Explorer NGL
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
MG
Query on MG

A MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Ligand Explorer NGL
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
Modified Residues 1 Unique
ID Chains Type Formula 2D Diagram Parent
MSE
Query on MSE
A L-PEPTIDE LINKING C5 H11 N O2 Se MET

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.288
  • R-Value Work: 0.244
  • Space Group: P 31 2 1
  • Electron Density Server: EDS EDS

Unit Cell:

Length (Å) Angle (°)
a = 81.61 α = 90.00
b = 81.61 β = 90.00
c = 226.65 γ = 120.00

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History

Deposition Data

  • Deposited Date: 2003-01-21
  • Released Date: 2003-04-29
  • Deposition author(s): Chimento, D.P., Mohanty, A.K., Kadner, R.J., Wiener, M.C.

Revision History

  • 2011-07-13
    Type: Flag residual B-value | Details: Tagged residual B temperature factor
  • 2011-07-13
    Type: Version format compliance | Details: compliance with PDB Exchange Dictionary V4