2F31

Crystal structure of the autoinhibitory switch in Formin mDia1; the DID/DAD complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.233 

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This is version 1.4 of the entry. See complete history


Literature

Structure of the Autoinhibitory Switch in Formin mDia1

Nezami, A.G.Poy, F.Eck, M.J.

(2006) Structure 14: 257-263

  • DOI: https://doi.org/10.1016/j.str.2005.12.003
  • Primary Citation of Related Structures:  
    2F31

  • PubMed Abstract: 

    Diaphanous-related formins (DRFs) regulate the nucleation and polymerization of unbranched actin filaments. The activity of DRFs is inhibited by an intramolecular interaction between their N-terminal regulatory region and a conserved C-terminal segment termed the Diaphanous autoinhibitory domain (DAD). Binding of GTP bound Rho to the mDia1 N terminus releases this autoinhibitory restraint. Here, we describe the crystal structure of the DAD segment of mDia1 in complex with the relevant N-terminal fragment, termed the DID domain. The structure reveals that the DAD segment forms an amphipathic helix that binds a conserved, concave surface on the DID domain. Comparison with the structure of the mDia1 N terminus bound to RhoC suggests that release of the autoinhibitory DAD interaction is accomplished largely by Rho-induced restructuring of the adjacent GTPase binding subdomain (GBD), but also by electrostatic repulsion and a small, direct steric occlusion of the DAD binding cleft by Rho itself.


  • Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 44 Binney Street, Boston, Massachusetts 02115, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Diaphanous protein homolog 1233Mus musculusMutation(s): 0 
Gene Names: Diaph1Diap1
UniProt & NIH Common Fund Data Resources
Find proteins for Q3US76 (Mus musculus)
Explore Q3US76 
Go to UniProtKB:  Q3US76
IMPC:  MGI:1194490
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ3US76
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Diaphanous protein homolog 120Mus musculusMutation(s): 0 
Gene Names: Diaph1Diap1
UniProt & NIH Common Fund Data Resources
Find proteins for O08808 (Mus musculus)
Explore O08808 
Go to UniProtKB:  O08808
IMPC:  MGI:1194490
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO08808
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.233 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.16α = 90
b = 65.79β = 104.08
c = 46.86γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
MAR345data collection
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-05-30
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 1.4: 2024-02-14
    Changes: Data collection, Database references