1ENH

STRUCTURAL STUDIES OF THE ENGRAILED HOMEODOMAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural studies of the engrailed homeodomain.

Clarke, N.D.Kissinger, C.R.Desjarlais, J.Gilliland, G.L.Pabo, C.O.

(1994) Protein Sci. 3: 1779-1787

  • DOI: 10.1002/pro.5560031018

  • PubMed Abstract: 
  • The structure of the Drosophila engrailed homeodomain has been solved by molecular replacement and refined to an R-factor of 19.7% at a resolution of 2.1 A. This structure offers a high-resolution view of an important family of DNA-binding proteins a ...

    The structure of the Drosophila engrailed homeodomain has been solved by molecular replacement and refined to an R-factor of 19.7% at a resolution of 2.1 A. This structure offers a high-resolution view of an important family of DNA-binding proteins and allows comparison to the structure of the same protein bound to DNA. The most significant difference between the current structure and that of the 2.8-A engrailed-DNA complex is the close packing of an extended strand against the rest of the protein in the unbound protein. Structural features of the protein not previously noted include a "herringbone" packing of 4 aromatic residues in the core of the protein and an extensive network of salt bridges that covers much of the helix 1-helix 2 surface. Other features that may play a role in stabilizing the native state include the interaction of buried carbonyl oxygen atoms with the edge of Phe 49 and a bias toward statistically preferred side-chain dihedral angles. There is substantial disorder at both ends of the 61 amino acid protein. A 51-amino acid variant of engrailed (residues 6-56) was synthesized and shown by CD and thermal denaturation studies to be structurally and thermodynamically similar to the full-length domain.


    Related Citations: 
    • Crystal Structure of an Engrailed Homeodomain-DNA Complex at 2.8 Resolution: A Framework for Understanding Homeodomain-DNA Interactions
      Kissinger, C.R.,Liu, B.,Martin-Blanco, E.,Kornberg, T.B.,Pabo, C.O.
      (1990) Cell 63: 579


    Organizational Affiliation

    Department of Biophysics and Biophysical Chemistry, Johns Hopkins School of Medicine, Baltimore, Maryland 21205.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ENGRAILED HOMEODOMAIN
A
54Drosophila melanogasterGene Names: en
Find proteins for P02836 (Drosophila melanogaster)
Go to UniProtKB:  P02836
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Work: 0.197 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 44.670α = 90.00
b = 44.670β = 90.00
c = 118.120γ = 120.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-08-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance