1USK

L-leucine-binding protein with leucine bound


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

X-Ray Structures of the Leucine-Binding Protein Illustrate Conformational Changes and the Basis of Ligand Specificity

Magnusson, U.Salopek-Sondi, B.Luck, L.A.Mowbray, S.L.

(2004) J Biol Chem 279: 8747

  • DOI: 10.1074/jbc.M311890200
  • Primary Citation of Related Structures:  
    1USK, 1USI, 1USG

  • PubMed Abstract: 
  • The periplasmic leucine-binding protein is the primary receptor for the leucine transport system in Escherichia coli. We report here the structure of an open ligand-free form solved by molecular replacement and refined at 1.5-A resolution. In addition, t ...

    The periplasmic leucine-binding protein is the primary receptor for the leucine transport system in Escherichia coli. We report here the structure of an open ligand-free form solved by molecular replacement and refined at 1.5-A resolution. In addition, two closed ligand-bound structures of the same protein are presented, a phenylalanine-bound form at 1.8 A and a leucine-bound structure at a nominal resolution of 2.4 A. These structures show the basis of this protein's ligand specificity, as well as illustrating the conformational changes that are associated with ligand binding. Comparison with earlier structures provides further information about solution conformations, as well as the different specificity of the closely related leucine/isoleucine/valine-binding protein.


    Organizational Affiliation

    Department of Cell and Molecular Biology, Uppsala University, Biomedical Center, Box 596, S-751 24 Uppsala, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
LEUCINE-SPECIFIC BINDING PROTEIN ABCD346Escherichia coliMutation(s): 0 
Find proteins for P04816 (Escherichia coli (strain K12))
Explore P04816 
Go to UniProtKB:  P04816
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
LEUKd :  400   nM  PDBBind
LEUKd:  400   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.421α = 112.79
b = 70.14β = 93.23
c = 79.902γ = 90.97
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-12-18
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-17
    Changes: Data collection