2EMT

Crystal Structure Analysis of the radixin FERM domain complexed with adhesion molecule PSGL-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of PSGL-1 binding to ERM proteins

Takai, Y.Kitano, K.Terawaki, S.Maesaki, R.Hakoshima, T.

(2007) Genes Cells 12: 1329-1338

  • DOI: 10.1111/j.1365-2443.2007.01137.x

  • PubMed Abstract: 
  • P-selectin glycoprotein ligand-1 (PSGL-1), an adhesion molecule with O-glycosylated extracellular sialomucins, is involved in leukocyte inflammatory responses. On activation, ezrin-radixin-moesin (ERM) proteins mediate the redistribution of PSGL-1 on ...

    P-selectin glycoprotein ligand-1 (PSGL-1), an adhesion molecule with O-glycosylated extracellular sialomucins, is involved in leukocyte inflammatory responses. On activation, ezrin-radixin-moesin (ERM) proteins mediate the redistribution of PSGL-1 on polarized cell surfaces to facilitate binding to target molecules. ERM proteins recognize a short binding motif, Motif-1, conserved in cytoplasmic tails of adhesion molecules, whereas PSGL-1 lacks Motif-1 residues important for binding to ERM proteins. The crystal structure of the complex between the radixin FERM domain and a PSGL-1 juxtamembrane peptide reveals that the peptide binds the groove of FERM subdomain C by forming a beta-strand associated with strand beta5C, followed by a loop flipped out towards the solvent. The Motif-1 3(10) helix present in the FERM-ICAM-2 complex is absent in PSGL-1 given the absence of a critical Motif-1 alanine residue, and PSGL-1 reduces its contact area with subdomain C. Non-conserved positions are occupied by large residues Met9 and His8, which stabilize peptide conformation and enhance groove binding. Non-conserved residues play an important role in compensating for loss of binding energy resulting from the absence of conserved residues important for binding.


    Related Citations: 
    • Crystallographic characterization of the radixin FERM domain bound to the cytoplasmic tails of adhesion molecules CD43 and PSGL-1
      Takai, Y.,Kitano, K.,Terawaki, S.,Maesaki, R.,Hakoshima, T.
      (2007) Acta Crystallogr.,Sect.F 63: 49


    Organizational Affiliation

    Structural Biology Laboratory, Nara Institute of Science and Technology, Nara, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Radixin
A, B
322Mus musculusMutation(s): 0 
Gene Names: Rdx
Find proteins for P26043 (Mus musculus)
Go to UniProtKB:  P26043
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
P-selectin glycoprotein ligand 1
C, D, E
18Mus musculusMutation(s): 0 
Gene Names: Selplg (Selp1, Selpl)
Find proteins for Q62170 (Mus musculus)
Go to UniProtKB:  Q62170
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.235 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 80.740α = 90.00
b = 85.730β = 90.00
c = 117.751γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
CNSrefinement
MOLREPphasing
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-03-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-11
    Type: Refinement description