1GC7

CRYSTAL STRUCTURE OF THE RADIXIN FERM DOMAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of the membrane-targeting and unmasking mechanisms of the radixin FERM domain.

Hamada, K.Shimizu, T.Matsui, T.Tsukita, S.Hakoshima, T.

(2000) EMBO J. 19: 4449-4462

  • DOI: 10.1093/emboj/19.17.4449
  • Primary Citation of Related Structures:  
  • Also Cited By: 2YVC, 2D11, 2D10

  • PubMed Abstract: 
  • Radixin is a member of the ezrin/radixin/moesin (ERM) family of proteins, which play a role in the formation of the membrane-associated cytoskeleton by linking actin filaments and adhesion proteins. This cross-linking activity is regulated by phospho ...

    Radixin is a member of the ezrin/radixin/moesin (ERM) family of proteins, which play a role in the formation of the membrane-associated cytoskeleton by linking actin filaments and adhesion proteins. This cross-linking activity is regulated by phosphoinositides such as phosphatidylinositol 4,5-bisphosphate (PIP2) in the downstream of the small G protein Rho. The X-ray crystal structures of the radixin FERM domain, which is responsible for membrane binding, and its complex with inositol-(1,4, 5)-trisphosphate (IP3) have been determined. The domain consists of three subdomains featuring a ubiquitin-like fold, a four-helix bundle and a phosphotyrosine-binding-like domain, respectively. These subdomains are organized by intimate interdomain interactions to form characteristic grooves and clefts. One such groove is negatively charged and so is thought to interact with basic juxta-membrane regions of adhesion proteins. IP3 binds a basic cleft that is distinct from those of pleckstrin homology domains and is located on a positively charged flat molecular surface, suggesting an electrostatic mechanism of plasma membrane targeting. Based on the structural changes associated with IP3 binding, a possible unmasking mechanism of ERM proteins by PIP2 is proposed.


    Related Citations: 
    • Crystallographic characterization of the membrane-binding domain of radixin
      Hamada, K.,Shimizu, T.,Matsui, T.,Tsukita, S.,Tsukita, S.,Hakoshima, T.
      (2000) Acta Crystallogr.,Sect.D 56: 922


    Organizational Affiliation

    Department of Molecular Biology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0101, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RADIXIN
A
297Mus musculusMutation(s): 0 
Gene Names: Rdx
Find proteins for P26043 (Mus musculus)
Go to UniProtKB:  P26043
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.215 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 96.330α = 90.00
b = 96.330β = 90.00
c = 133.040γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
CNSrefinement
CCP4data scaling
MLPHAREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-09-20
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance