1MI7

Crystal Structure of Domain Swapped trp Aporepressor in 30%(v/v) Isopropanol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.253 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

E. coli trp repressor forms a domain-swapped array in aqueous alcohol.

Lawson, C.L.Benoff, B.Berger, T.Berman, H.M.Carey, J.

(2004) Structure 12: 1099-1108

  • DOI: 10.1016/j.str.2004.03.019

  • PubMed Abstract: 
  • The E. coli trp repressor (trpR) homodimer recognizes its palindromic DNA binding site through a pair of flexible helix-turn-helix (HTH) motifs displayed on an intertwined helical core. Flexible N-terminal arms mediate association between dimers boun ...

    The E. coli trp repressor (trpR) homodimer recognizes its palindromic DNA binding site through a pair of flexible helix-turn-helix (HTH) motifs displayed on an intertwined helical core. Flexible N-terminal arms mediate association between dimers bound to tandem DNA sites. The 2.5 A X-ray structure of trpR crystallized in 30% (v/v) isopropanol reveals a substantial conformational rearrangement of HTH motifs and N-terminal arms, with the protein appearing in the unusual form of an ordered 3D domain-swapped supramolecular array. Small angle X-ray scattering measurements show that the self-association properties of trpR in solution are fundamentally altered by isopropanol.


    Organizational Affiliation

    Rutgers University, Department of Chemistry and Chemical Biology, 610 Taylor Road, Piscataway, NJ 08854, USA. cathy.lawson@rutgers.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Trp operon repressor
R
107Escherichia coli (strain K12)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
IPA
Query on IPA

Download SDF File 
Download CCD File 
R
ISOPROPYL ALCOHOL
2-PROPANOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.253 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 85.310α = 90.00
b = 85.310β = 90.00
c = 113.968γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-09-02
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance