1USG Transport Protein date Nov 24, 2003
title L-Leucine-Binding Protein, Apo Form
authors U.Magnusson, B.Salopek-Sondi, L.A.Luck, S.L.Mowbray
compound source
Molecule: Leucine-Specific Binding Protein
Chain: A
Synonym: L-Leucine-Binding Protein, Ls-Bp, L-Bp
Engineered: Yes
Organism_scientific: Escherichia Coli
Organism_taxid: 562
Expression_system: Escherichia Coli
Expression_system_taxid: 511693
Expression_system_strain: Bl21
Expression_system_plasmid: Pksty
symmetry Space Group: C 1 2 1
R_factor 0.189 R_Free 0.216
length a length b length c angle alpha angle beta angle gamma
91.410 79.200 65.180 90.00 133.60 90.00
method X-Ray Diffractionresolution 1.53 Å
related structures by homologous chain: 1USI

Primary referenceX-ray structures of the leucine-binding protein illustrate conformational changes and the basis of ligand specificity., Magnusson U, Salopek-Sondi B, Luck LA, Mowbray SL, J Biol Chem 2004 Mar 5;279(10):8747-52. Epub 2003 Dec 12. PMID:14672931
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (60 Kb) [Save to disk]
  • Biological Unit Coordinates (1usg.pdb1.gz) 110 Kb
  • CSU: Contacts of Structural Units for 1USG
  • Likely Quarternary Molecular Structure file(s) for 1USG
  • Structure Factors (344 Kb)
  • Retrieve 1USG in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1USG from S2C, [Save to disk]
  • Re-refined 1usg structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 1USG in 3D
  • Proteopedia, because life has more than 2D.
  • On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure.
  • On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.
  • Visual 3D analysis of 1USG
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Electron Density related parameters from EDS Electron Density Server, at Upsala
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 1USG, from MSDmotif at EBI
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1usga_, region A [Jmol] [rasmolscript] [script source]
  • Fold representative 1usg from FSSP and Dali (Families of Structurally Similar Proteins)
  • Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH
  • Summaries and structural analyses of PDB data files from PDBSum
  • Identification of Protein Pockets & Cavities at CASTp
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [1usg_A] [1usg]
  • SWISS-PROT database: [P04816]
  • Belongs to the atp-binding cassette (abc) superfamily according to TCDB.
  • Domain organization of [LIVK_ECOLI] by SWISSPFAM
  • Other resources with information on 1USG
  • Community annotation for 1USG at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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