L-leucine-binding protein with leucine bound

Experimental Data Snapshot

  • 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 1.4 of the entry. See complete history


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

  • 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, 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
346Escherichia coliMutation(s): 0 
Find proteins for P04816 (Escherichia coli (strain K12))
Explore P04816 
Go to UniProtKB:  P04816
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04816
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • 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
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • 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
  • Version 1.4: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description