3SSX

E. coli trp aporeporessor L75F mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5801 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Environment-dependent long-range structural distortion in a temperature-sensitive point mutant.

Carey, J.Benoff, B.Harish, B.Yuan, L.Lawson, C.L.

(2012) Protein Sci. 21: 63-74

  • DOI: 10.1002/pro.759
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Extensive environment-dependent rearrangement of the helix-turn-helix DNA recognition region and adjacent L-tryptophan binding pocket is reported in the crystal structure of dimeric E. coli trp aporepressor with point mutation Leu75Phe. In one of two ...

    Extensive environment-dependent rearrangement of the helix-turn-helix DNA recognition region and adjacent L-tryptophan binding pocket is reported in the crystal structure of dimeric E. coli trp aporepressor with point mutation Leu75Phe. In one of two subunits, the eight residues immediately C-terminal to the mutation are shifted forward in helical register by three positions, and the five following residues form an extrahelical loop accommodating the register shift. In contrast, the second subunit has wildtype-like conformation, as do both subunits in an isomorphous wildtype control structure. Treated together as an ensemble pair, the distorted and wildtype-like conformations of the mutant apoprotein agree more fully than either conformation alone with previously reported NOE measurements, and account more completely for its diverse biochemical and biophysical properties. The register-shifted segment Ile79-Ala80-Thr81-Ile82-Thr83 is helical in both conformations despite low helical propensity, suggesting an important structural role for the steric constraints imposed by β-branched residues in helical conformation.


    Organizational Affiliation

    Chemistry Department, Princeton University, Princeton, New Jersey 08544, USA. jcarey@princeton.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Trp operon repressor
R, N
107Escherichia coli (strain K12)Mutation(s): 1 
Gene Names: trpR (rtrY)
Find proteins for P0A881 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A881
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TAM
Query on TAM

Download SDF File 
Download CCD File 
N
TRIS(HYDROXYETHYL)AMINOMETHANE
C7 H17 N O3
GKODZWOPPOTFGA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5801 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.175 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 35.716α = 90.00
b = 54.105β = 100.10
c = 55.633γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
AMoREphasing
PDB_EXTRACTdata extraction
DENZOdata reduction
PHENIXrefinement
CBASSdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-20
    Type: Initial release
  • Version 1.1: 2011-12-07
    Type: Database references
  • Version 1.2: 2011-12-28
    Type: Database references