1P7J

Crystal structure of engrailed homeodomain mutant K52E


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal Structures of Engrailed Homeodomain Mutants: IMPLICATIONS FOR STABILITY AND DYNAMICS

Stollar, E.J.Mayor, U.Lovell, S.C.Federici, L.Freund, S.M.Fersht, A.R.Luisi, B.F.

(2003) J Biol Chem 278: 43699-43708

  • DOI: 10.1074/jbc.M308029200
  • Primary Citation of Related Structures:  
    1P7J, 1P7I

  • PubMed Abstract: 
  • We report the crystal structures and biophysical characterization of two stabilized mutants of the Drosophila Engrailed homeodomain that have been engineered to minimize electrostatic repulsion. Four independent copies of each mutant occupy the cryst ...

    We report the crystal structures and biophysical characterization of two stabilized mutants of the Drosophila Engrailed homeodomain that have been engineered to minimize electrostatic repulsion. Four independent copies of each mutant occupy the crystal lattice, and comparison of these structures illustrates variation that can be partly ascribed to networks of correlated conformational adjustments. Central to one network is leucine 26 (Leu26), which occupies alternatively two side chain rotameric conformations (-gauche and trans) and different positions within the hydrophobic core. Similar sets of conformational substates are observed in other Engrailed structures and in another homeodomain. The pattern of structural adjustments can account for NMR relaxation data and sequence co-variation networks in the wider homeodomain family. It may also explain the dysfunction associated with a P26L mutation in the human ARX homeodomain protein. Finally, we observe a novel dipolar interaction between a conserved tryptophan and a water molecule positioned along the normal to the indole ring. This interaction may explain the distinctive fluorescent properties of the homeodomain family.


    Related Citations: 
    • Structural studies of the engrailed homeodomain
      Clarke, N.D., Kissinger, C.R., Desjarlais, J., Gilliland, G.L., Pabo, C.O.
      (1994) Protein Sci 3: 1779
    • Engrailed Homeodomain-DNA Complex at 2.2 A Resolution: A Detailed View of the Interface and Comparison with other Engrailed Structures
      Fraenkel, E., Rould, M.A., Chambers, K.A., Pabo, C.O.
      (1998) J Mol Biol 284: 351

    Organizational Affiliation

    Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Segmentation polarity homeobox protein engrailedA, B, C, D59Drosophila melanogasterMutation(s): 1 
Gene Names: enCG9015
Find proteins for P02836 (Drosophila melanogaster)
Explore P02836 
Go to UniProtKB:  P02836
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NHE
Query on NHE

Download CCD File 
A
2-[N-CYCLOHEXYLAMINO]ETHANE SULFONIC ACID
C8 H17 N O3 S
MKWKNSIESPFAQN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.85α = 90
b = 51.679β = 90
c = 112.785γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
EPMRphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-10-14
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance