2HDD

ENGRAILED HOMEODOMAIN Q50K VARIANT DNA COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Engrailed (Gln50-->Lys) homeodomain-DNA complex at 1.9 A resolution: structural basis for enhanced affinity and altered specificity.

Tucker-Kellogg, L.Rould, M.A.Chambers, K.A.Ades, S.E.Sauer, R.T.Pabo, C.O.

(1997) Structure 5: 1047-1054


  • PubMed Abstract: 
  • The homeodomain is one of the key DNA-binding motifs used in eukaryotic gene regulation, and homeodomain proteins play critical roles in development. The residue at position 50 of many homeodomains appears to determine the differential DNA-binding sp ...

    The homeodomain is one of the key DNA-binding motifs used in eukaryotic gene regulation, and homeodomain proteins play critical roles in development. The residue at position 50 of many homeodomains appears to determine the differential DNA-binding specificity, helping to distinguish among binding sites of the form TAATNN. However, the precise role(s) of residue 50 in the differential recognition of alternative sites has not been clear. None of the previously determined structures of homeodomain-DNA complexes has shown evidence for a stable hydrogen bond between residue 50 and a base, and there has been much discussion, based in part on NMR studies, about the potential importance of water-mediated contacts. This study was initiated to help clarify some of these issues.


    Organizational Affiliation

    Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge 02139, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (ENGRAILED HOMEODOMAIN Q50K)
A, B
61Drosophila melanogasterMutation(s): 1 
Gene Names: en
Find proteins for P02836 (Drosophila melanogaster)
Go to UniProtKB:  P02836
Entity ID: 1
MoleculeChainsLengthOrganism
DNA (5'-D(*TP*TP*TP*TP*GP*CP*CP*AP*TP*GP*TP*AP*AP*TP*CP*CP*C P*CP*GP*GP*A)-3')C21N/A
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*AP*TP*CP*CP*GP*GP*GP*GP*AP*TP*TP*AP*CP*AP*TP*GP*G P*CP*AP*AP*A)-3')D21N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.205 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 127.720α = 90.00
b = 45.340β = 119.53
c = 72.470γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-05-27
    Type: Initial release
  • Version 1.1: 2008-05-22
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance