Structure of the Ankyrin Domain of the Drosophila Notch Receptor

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

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Structure and stability of the ankyrin domain of the Drosophila Notch receptor

Zweifel, M.E.Leahy, D.J.Hughson, F.M.Barrick, D.

(2003) Protein Sci 12: 2622-2632

  • DOI: https://doi.org/10.1110/ps.03279003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The Notch receptor contains a conserved ankyrin repeat domain that is required for Notch-mediated signal transduction. The ankyrin domain of Drosophila Notch contains six ankyrin sequence repeats previously identified as closely matching the ankyrin repeat consensus sequence, and a putative seventh C-terminal sequence repeat that exhibits lower similarity to the consensus sequence. To better understand the role of the Notch ankyrin domain in Notch-mediated signaling and to examine how structure is distributed among the seven ankyrin sequence repeats, we have determined the crystal structure of this domain to 2.0 angstroms resolution. The seventh, C-terminal, ankyrin sequence repeat adopts a regular ankyrin fold, but the first, N-terminal ankyrin repeat, which contains a 15-residue insertion, appears to be largely disordered. The structure reveals a substantial interface between ankyrin polypeptides, showing a high degree of shape and charge complementarity, which may be related to homotypic interactions suggested from indirect studies. However, the Notch ankyrin domain remains largely monomeric in solution, demonstrating that this interface alone is not sufficient to promote tight association. Using the structure, we have classified reported mutations within the Notch ankyrin domain that are known to disrupt signaling into those that affect buried residues and those restricted to surface residues. We show that the buried substitutions greatly decrease protein stability, whereas the surface substitutions have only a marginal affect on stability. The surface substitutions are thus likely to interfere with Notch signaling by disrupting specific Notch-effector interactions and map the sites of these interactions.

  • Organizational Affiliation

    T.C. Jenkins Department of Biophysics, The Johns Hopkins University, Baltimore, Maryland 21218, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Neurogenic locus Notch protein
A, B, C
239Drosophila melanogasterMutation(s): 2 
Gene Names: N OR EG:140G11.1 OR EG:163A10.2 OR CG3936NCG3936
Find proteins for P07207 (Drosophila melanogaster)
Explore P07207 
Go to UniProtKB:  P07207
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07207
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.629α = 90
b = 73.629β = 90
c = 341.056γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-10-28
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2021-10-27
    Changes: Database references, Derived calculations