4UWX

Structure of liprin-alpha3 in complex with mDia1 Diaphanous- inhibitory domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural and Biochemical Basis for the Inhibitory Effect of Liprin-Alpha3 on Mouse Diaphanous 1 (Mdia1) Function.

Brenig, J.De Boor, S.Knyphausen, P.Kuhlmann, N.Wroblowski, S.Baldus, L.Scislowski, L.Artz, O.Trauschies, P.Baumann, U.Neundorf, I.Lammers, M.

(2015) J.Biol.Chem. 290: 14314

  • DOI: 10.1074/jbc.M114.621946

  • PubMed Abstract: 
  • Diaphanous-related formins are eukaryotic actin nucleation factors regulated by an autoinhibitory interaction between the N-terminal RhoGTPase-binding domain (mDiaN) and the C-terminal Diaphanous-autoregulatory domain (DAD). Although the activation o ...

    Diaphanous-related formins are eukaryotic actin nucleation factors regulated by an autoinhibitory interaction between the N-terminal RhoGTPase-binding domain (mDiaN) and the C-terminal Diaphanous-autoregulatory domain (DAD). Although the activation of formins by Rho proteins is well characterized, its inactivation is only marginally understood. Recently, liprin-α3 was shown to interact with mDia1. Overexpression of liprin-α3 resulted in a reduction of the cellular actin filament content. The molecular mechanisms of how liprin-α3 exerts this effect and counteracts mDia1 activation by RhoA are unknown. Here, we functionally and structurally define a minimal liprin-α3 core region, sufficient to recapitulate the liprin-α3 determined mDia1-respective cellular functions. We show that liprin-α3 alters the interaction kinetics and thermodynamics of mDiaN with RhoA·GTP and DAD. RhoA displaces liprin-α3 allosterically, whereas DAD competes with liprin-α3 for a highly overlapping binding site on mDiaN. Liprin-α3 regulates actin polymerization by lowering the regulatory potency of RhoA and DAD on mDiaN. We present a model of a mechanistically unexplored and new aspect of mDiaN regulation by liprin-α3.


    Organizational Affiliation

    From the Institute for Genetics and Cologne Excellence Cluster on Cellular Stress Responses in Aging-associated Diseases (CECAD), Joseph-Stelzmann-Strasse 26, University of Cologne, 50931 Cologne, Germany and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN DIAPHANOUS HOMOLOG 1
A, B
239Mus musculusMutation(s): 0 
Gene Names: Diaph1 (Diap1)
Find proteins for O08808 (Mus musculus)
Go to UniProtKB:  O08808
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
LIPRIN-ALPHA-3
C, D
21Mus musculusMutation(s): 0 
Gene Names: Ppfia3
Find proteins for P60469 (Mus musculus)
Go to UniProtKB:  P60469
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
144
Query on 144

Download SDF File 
Download CCD File 
A, B
TRIS-HYDROXYMETHYL-METHYL-AMMONIUM
C4 H12 N O3
DRDCQJADRSJFFD-UHFFFAOYSA-N
 Ligand Interaction
NI
Query on NI

Download SDF File 
Download CCD File 
A, B
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.175 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 121.090α = 90.00
b = 49.381β = 97.86
c = 106.370γ = 90.00
Software Package:
Software NamePurpose
TRUNCATEdata scaling
PHASERphasing
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-05-06
    Type: Initial release
  • Version 1.1: 2015-05-13
    Type: Database references
  • Version 1.2: 2015-06-17
    Type: Database references