1P7I

CRYSTAL STRUCTURE OF ENGRAILED HOMEODOMAIN MUTANT K52A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.240 
  • R-Value Work: 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:  

  • 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: 
    • 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
    • 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


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Segmentation polarity homeobox protein engrailed
A, B, C, D
59Drosophila melanogasterMutations: K52A
Gene Names: en
Find proteins for P02836 (Drosophila melanogaster)
Go to UniProtKB:  P02836
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NHE
Query on NHE

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.664α = 90.00
b = 51.176β = 90.00
c = 108.253γ = 90.00
Software Package:
Software NamePurpose
EPMRphasing
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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