4DVG

Crystal structure of E. histolytica Formin1 bound to EhRho1-GTPgammaS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.604 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Entamoeba histolytica Rho1 Regulates Actin Polymerization through a Divergent, Diaphanous-Related Formin.

Bosch, D.E.Yang, B.Siderovski, D.P.

(2012) Biochemistry 51: 8791-8801

  • DOI: 10.1021/bi300954g

  • PubMed Abstract: 
  • Entamoeba histolytica requires a dynamic actin cytoskeleton for intestinal and systemic pathogenicity. Diaphanous-related formins represent an important family of actin regulators that are activated by Rho GTPases. The E. histolytica genome encodes a ...

    Entamoeba histolytica requires a dynamic actin cytoskeleton for intestinal and systemic pathogenicity. Diaphanous-related formins represent an important family of actin regulators that are activated by Rho GTPases. The E. histolytica genome encodes a large family of Rho GTPases and three diaphanous-related formins, of which EhFormin1 is known to regulate mitosis and cytokinesis in trophozoites. We demonstrate that EhFormin1 modulates actin polymerization through its formin homology 2 domain. Despite a highly divergent diaphanous autoinhibitory domain, EhFormin1 is autoinhibited by an N- and C-terminal intramolecular interaction but activated upon binding of EhRho1 to the N-terminal domain tandem. A crystal structure of the EhRho1·GTPγS-EhFormin1 complex illustrates an EhFormin1 conformation that diverges from mammalian mDia1 and lacks a secondary interaction with a Rho insert helix. The structural model also highlights residues required for specific recognition of the EhRho1 GTPase and suggests that the molecular mechanisms of EhFormin1 autoinhibition and activation differ from those of mammalian homologues.


    Organizational Affiliation

    Department of Pharmacology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-7365, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Rho-like small GTPase
A
188Entamoeba histolyticaN/A
Find proteins for C4M4W4 (Entamoeba histolytica)
Go to UniProtKB:  C4M4W4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Diaphanous protein
B
353Entamoeba histolyticaN/A
Find proteins for C4M622 (Entamoeba histolytica)
Go to UniProtKB:  C4M622
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
GSP
Query on GSP

Download SDF File 
Download CCD File 
A
5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE
C10 H16 N5 O13 P3 S
XOFLBQFBSOEHOG-UUOKFMHZSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.604 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.215 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 138.564α = 90.00
b = 138.564β = 90.00
c = 57.765γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
HKL-2000data collection
PHENIXphasing
PHENIXmodel building
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-11-14
    Type: Initial release
  • Version 1.1: 2012-11-28
    Type: Database references