The solution structure of human DOCK2 SH3 domain - ELMO1 peptide chimera complex

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

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Structural basis for mutual relief of the Rac guanine nucleotide exchange factor DOCK2 and its partner ELMO1 from their autoinhibited forms.

Hanawa-Suetsugu, K.Kukimoto-Niino, M.Mishima-Tsumagari, C.Akasaka, R.Ohsawa, N.Sekine, S.Ito, T.Tochio, N.Koshiba, S.Kigawa, T.Terada, T.Shirouzu, M.Nishikimi, A.Uruno, T.Katakai, T.Kinashi, T.Kohda, D.Fukui, Y.Yokoyama, S.

(2012) Proc Natl Acad Sci U S A 109: 3305-3310

  • DOI: https://doi.org/10.1073/pnas.1113512109
  • Primary Citation of Related Structures:  
    2RQR, 3A98, 3B13

  • PubMed Abstract: 

    DOCK2, a hematopoietic cell-specific, atypical guanine nucleotide exchange factor, controls lymphocyte migration through ras-related C3 botulinum toxin substrate (Rac) activation. Dedicator of cytokinesis 2-engulfment and cell motility protein 1 (DOCK2•ELMO1) complex formation is required for DOCK2-mediated Rac signaling. In this study, we identified the N-terminal 177-residue fragment and the C-terminal 196-residue fragment of human DOCK2 and ELMO1, respectively, as the mutual binding regions, and solved the crystal structure of their complex at 2.1-Å resolution. The C-terminal Pro-rich tail of ELMO1 winds around the Src-homology 3 domain of DOCK2, and an intermolecular five-helix bundle is formed. Overall, the entire regions of both DOCK2 and ELMO1 assemble to create a rigid structure, which is required for the DOCK2•ELMO1 binding, as revealed by mutagenesis. Intriguingly, the DOCK2•ELMO1 interface hydrophobically buries a residue which, when mutated, reportedly relieves DOCK180 from autoinhibition. We demonstrated that the ELMO-interacting region and the DOCK-homology region 2 guanine nucleotide exchange factor domain of DOCK2 associate with each other for the autoinhibition, and that the assembly with ELMO1 weakens the interaction, relieving DOCK2 from the autoinhibition. The interactions between the N- and C-terminal regions of ELMO1 reportedly cause its autoinhibition, and binding with a DOCK protein relieves the autoinhibition for ras homolog gene family, member G binding and membrane localization. In fact, the DOCK2•ELMO1 interface also buries the ELMO1 residues required for the autoinhibition within the hydrophobic core of the helix bundle. Therefore, the present complex structure reveals the structural basis by which DOCK2 and ELMO1 mutually relieve their autoinhibition for the activation of Rac1 for lymphocyte chemotaxis.

  • Organizational Affiliation

    RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro, Tsurumi, Yokohama 230-0045, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Engulfment and cell motility protein 1,Dedicator of cytokinesis protein 2119Homo sapiensMutation(s): 0 
Gene Names: ELMO1KIAA0281DOCK2KIAA0209
UniProt & NIH Common Fund Data Resources
Find proteins for Q92608 (Homo sapiens)
Explore Q92608 
Go to UniProtKB:  Q92608
PHAROS:  Q92608
GTEx:  ENSG00000134516 
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 GroupsQ92608Q92556
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-10-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2019-09-04
    Changes: Data collection, Database references
  • Version 1.3: 2020-01-22
    Changes: Database references, Source and taxonomy, Structure summary