6TGC

CryoEM structure of the ternary DOCK2-ELMO1-RAC1 complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report



Literature

Structure of the DOCK2-ELMO1 complex provides insights into regulation of the auto-inhibited state.

Chang, L.Yang, J.Jo, C.H.Boland, A.Zhang, Z.McLaughlin, S.H.Abu-Thuraia, A.Killoran, R.C.Smith, M.J.Cote, J.F.Barford, D.

(2020) Nat Commun 11: 3464-3464

  • DOI: 10.1038/s41467-020-17271-9
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • DOCK (dedicator of cytokinesis) proteins are multidomain guanine nucleotide exchange factors (GEFs) for RHO GTPases that regulate intracellular actin dynamics. DOCK proteins share catalytic (DOCK DHR2 ) and membrane-associated (DOCK D ...

    DOCK (dedicator of cytokinesis) proteins are multidomain guanine nucleotide exchange factors (GEFs) for RHO GTPases that regulate intracellular actin dynamics. DOCK proteins share catalytic (DOCK DHR2 ) and membrane-associated (DOCK DHR1 ) domains. The structurally-related DOCK1 and DOCK2 GEFs are specific for RAC, and require ELMO (engulfment and cell motility) proteins for function. The N-terminal RAS-binding domain (RBD) of ELMO (ELMO RBD ) interacts with RHOG to modulate DOCK1/2 activity. Here, we determine the cryo-EM structures of DOCK2-ELMO1 alone, and as a ternary complex with RAC1, together with the crystal structure of a RHOG-ELMO2 RBD complex. The binary DOCK2-ELMO1 complex adopts a closed, auto-inhibited conformation. Relief of auto-inhibition to an active, open state, due to a conformational change of the ELMO1 subunit, exposes binding sites for RAC1 on DOCK2 DHR2 , and RHOG and BAI GPCRs on ELMO1. Our structure explains how up-stream effectors, including DOCK2 and ELMO1 phosphorylation, destabilise the auto-inhibited state to promote an active GEF.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, UK. dbarford@mrc-lmb.cam.ac.uk.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dedicator of cytokinesis protein 2A, D1830Homo sapiensMutation(s): 0 
Gene Names: DOCK2KIAA0209
Find proteins for Q92608 (Homo sapiens)
Explore Q92608 
Go to UniProtKB:  Q92608
NIH Common Fund Data Resources
PHAROS  Q92608
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Engulfment and cell motility protein 1B, E727Homo sapiensMutation(s): 0 
Gene Names: ELMO1KIAA0281
Find proteins for Q92556 (Homo sapiens)
Explore Q92556 
Go to UniProtKB:  Q92556
NIH Common Fund Data Resources
PHAROS  Q92556
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Ras-related C3 botulinum toxin substrate 1C, F192Homo sapiensMutation(s): 0 
Gene Names: RAC1TC25MIG5
EC: 3.6.5.2
Find proteins for P63000 (Homo sapiens)
Explore P63000 
Go to UniProtKB:  P63000
NIH Common Fund Data Resources
PHAROS  P63000
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMC_UP_1201/6
Cancer Research UKUnited KingdomC576/A14109
Marie Sklodowska-Curie Actions, FragNET ITNUnited Kingdom657725

Revision History 

  • Version 1.0: 2020-07-29
    Type: Initial release