1USI Transport Protein date Nov 24, 2003
title L-Leucine-Binding Protein With Phenylalanine Bound
authors U.Magnusson, B.Salopek-Sondi, L.A.Luck, S.L.Mowbray
compound source
Molecule: Leucine-Specific Binding Protein
Chain: A, C
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: P 1 21 1
R_factor 0.189 R_Free 0.222
length a length b length c angle alpha angle beta angle gamma
68.236 78.143 70.183 90.00 102.82 90.00
method X-Ray Diffractionresolution 1.80 Å
ligand PHE enzyme
related structures by homologous chain: 1USG, 1USK
A, C

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] (115 Kb) [Save to disk]
  • Biological Unit Coordinates (1usi.pdb1.gz) 57 Kb
  • Biological Unit Coordinates (1usi.pdb2.gz) 57 Kb
  • LPC: Ligand-Protein Contacts for 1USI
  • CSU: Contacts of Structural Units for 1USI
  • Likely Quarternary Molecular Structure file(s) for 1USI
  • Structure Factors (905 Kb)
  • Retrieve 1USI in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1USI from S2C, [Save to disk]
  • Re-refined 1usi structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 1USI 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 1USI
  • 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 1USI, from MSDmotif at EBI
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1usia_, region A [Jmol] [rasmolscript] [script source]
        - Domain d1usic_, region C [Jmol] [rasmolscript] [script source]
  • Fold representative 1usi 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: [1usi_A] [1usi_C] [1usi]
  • 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 1USI
  • Community annotation for 1USI 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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