2BAP

Crystal structure of the N-terminal mDia1 Armadillo Repeat Region and Dimerisation Domain in complex with the mDia1 autoregulatory domain (DAD)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.364 
  • R-Value Work: 0.288 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The regulation of mDia1 by autoinhibition and its release by Rho*GTP.

Lammers, M.Rose, R.Scrima, A.Wittinghofer, A.

(2005) Embo J. 24: 4176-4187

  • DOI: 10.1038/sj.emboj.7600879

  • PubMed Abstract: 
  • Formins induce the nucleation and polymerisation of unbranched actin filaments via the formin-homology domains 1 and 2. Diaphanous-related formins (Drfs) are regulated by a RhoGTPase-binding domain situated in the amino-terminal (N-terminal) region a ...

    Formins induce the nucleation and polymerisation of unbranched actin filaments via the formin-homology domains 1 and 2. Diaphanous-related formins (Drfs) are regulated by a RhoGTPase-binding domain situated in the amino-terminal (N-terminal) region and a carboxy-terminal Diaphanous-autoregulatory domain (DAD), whose interaction stabilises an autoinhibited inactive conformation. Binding of active Rho releases DAD and activates the catalytic activity of mDia. Here, we report on the interaction of DAD with the regulatory N-terminus of mDia1 (mDia(N)) and its release by Rho*GTP. We have defined the elements required for tight binding and solved the three-dimensional structure of a complex between an mDia(N) construct and DAD by X-ray crystallography. The core DAD region is an alpha-helical peptide, which binds in the most highly conserved region of mDia(N) using mainly hydrophobic interactions. The structure suggests a two-step mechanism for release of autoinhibition whereby Rho*GTP, although having a partially nonoverlapping binding site, displaces DAD by ionic repulsion and steric clashes. We show that Rho*GTP accelerates the dissociation of DAD from the mDia(N)*DAD complex.


    Organizational Affiliation

    Department of Structural Biology, Max-Planck-Institute of Molecular Physiology, Dortmund, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Diaphanous protein homolog 1
B, A
317Mus musculusMutation(s): 0 
Gene Names: Diaph1 (Diap1)
Find proteins for O08808 (Mus musculus)
Go to UniProtKB:  O08808
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Diaphanous protein homolog 1
D, C
56Mus musculusMutation(s): 0 
Gene Names: Diaph1 (Diap1)
Find proteins for O08808 (Mus musculus)
Go to UniProtKB:  O08808
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.364 
  • R-Value Work: 0.288 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 138.450α = 90.00
b = 138.450β = 90.00
c = 210.890γ = 120.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
PHASERphasing
MAR345data collection
REFMACrefinement
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-03-07
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description