Biological Assembly 1  

 3D View: Structure

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 6-mer - A2B2C2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: cross-linking

Macromolecule Content

• Total Structure Weight: 602.54 kDa 
• Atom Count: 33282 
• Modelled Residue Count: 4614 
• Deposited Residue Count: 5498 
• Unique protein chains: 3

6TGC

CryoEM structure of the ternary DOCK2-ELMO1-RAC1 complex

• DOI: 10.2210/pdb6TGC/pdb
• EMDataResource: EMD-10498

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Trichoplusia ni
• Mutation(s): No 


• Deposited: 2019-11-15 Released: 2020-07-29 
• Deposition Author(s): Chang, L., Yang, J., Chang, J.H., Zhang, Z., Boland, A., McLaughlin, S.H., Abu-Thuraia, A., Killoran, R.C., Smith, M.J., Cote, J.F., Barford, D.
• Funding Organization(s): Medical Research Council (United Kingdom), Cancer Research UK, Marie Sklodowska-Curie Actions, FragNET ITN

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Experimental Data Snapshot

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

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

• PubMed: 32651375 
• DOI: 10.1038/s41467-020-17271-9
• Primary Citation of Related Structures:  
  6UKA, 6TGB, 6TGC


• 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 ^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.

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Organizational Affiliation: 

MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, UK. [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Dedicator of cytokinesis protein 2	A, D	1830	Homo sapiens	Mutation(s): 0  Gene Names: DOCK2, KIAA0209
UniProt & NIH Common Fund Data Resources
Find proteins for Q92608 (Homo sapiens) Explore Q92608  Go to UniProtKB:  Q92608
PHAROS:  Q92608 GTEx:  ENSG00000134516

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Engulfment and cell motility protein 1	B, E	727	Homo sapiens	Mutation(s): 0  Gene Names: ELMO1, KIAA0281
UniProt & NIH Common Fund Data Resources
Find proteins for Q92556 (Homo sapiens) Explore Q92556  Go to UniProtKB:  Q92556
PHAROS:  Q92556 GTEx:  ENSG00000155849

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Ras-related C3 botulinum toxin substrate 1	C, F	192	Homo sapiens	Mutation(s): 0  Gene Names: RAC1, TC25, MIG5 EC: 3.6.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for P63000 (Homo sapiens) Explore P63000  Go to UniProtKB:  P63000
PHAROS:  P63000 GTEx:  ENSG00000136238

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2019-11-15 
• Released Date: 2020-07-29 
Deposition Author(s): Chang, L., Yang, J., Chang, J.H., Zhang, Z., Boland, A., McLaughlin, S.H., Abu-Thuraia, A., Killoran, R.C., Smith, M.J., Cote, J.F., Barford, D.

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Funding Organization	Location	Grant Number
Medical Research Council (United Kingdom)	United Kingdom	MC_UP_1201/6
Cancer Research UK	United Kingdom	C576/A14109
Marie Sklodowska-Curie Actions, FragNET ITN	United Kingdom	657725

Revision History  

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