Crystal Structure of the ELMO1 PH domain

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 

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An Alpha-Helical Extension of the Elmo1 Pleckstrin Homology Domain Mediates Direct Interaction to Dock180 and is Critical in Rac Signaling.

Komander, D.Patel, M.Laurin, M.Fradet, N.Pelletier, A.Barford, D.Cote, J.-F.

(2008) Mol Biol Cell 19: 4837

  • DOI: https://doi.org/10.1091/mbc.e08-04-0345
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The mammalian DOCK180 protein belongs to an evolutionarily conserved protein family, which together with ELMO proteins, is essential for activation of Rac GTPase-dependent biological processes. Here, we have analyzed the DOCK180-ELMO1 interaction, and map direct interaction interfaces to the N-terminal 200 amino acids of DOCK180, and to the C-terminal 200 amino acids of ELMO1, comprising the ELMO1 PH domain. Structural and biochemical analysis of this PH domain reveals that it is incapable of phospholipid binding, but instead structurally resembles FERM domains. Moreover, the structure revealed an N-terminal amphiphatic alpha-helix, and point mutants of invariant hydrophobic residues in this helix disrupt ELMO1-DOCK180 complex formation. A secondary interaction between ELMO1 and DOCK180 is conferred by the DOCK180 SH3 domain and proline-rich motifs at the ELMO1 C-terminus. Mutation of both DOCK180-interaction sites on ELMO1 is required to disrupt the DOCK180-ELMO1 complex. Significantly, although this does not affect DOCK180 GEF activity toward Rac in vivo, Rac signaling is impaired, implying additional roles for ELMO in mediating intracellular Rac signaling.

  • Organizational Affiliation

    Section of Structural Biology, Chester Beatty Laboratories, Institute of Cancer Research, London SW3 6JB, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
149Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q92556 (Homo sapiens)
Explore Q92556 
Go to UniProtKB:  Q92556
PHAROS:  Q92556
GTEx:  ENSG00000155849 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ92556
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 166.016α = 90
b = 166.016β = 90
c = 81.704γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Refinement description, Version format compliance
  • Version 1.2: 2024-05-08
    Changes: Data collection, Database references, Other