2YVC

Crystal structure of the Radixin FERM domain complexed with the NEP cytoplasmic tail


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for type II membrane protein binding by ERM proteins revealed by the radixin-neutral endopeptidase 24.11 (NEP) complex

Terawaki, S.Kitano, K.Hakoshima, T.

(2007) J.Biol.Chem. 282: 19854-19862

  • DOI: 10.1074/jbc.M609232200

  • PubMed Abstract: 
  • ERM (Ezrin/Radixin/Moesin) proteins mediate formation of membrane-associated cytoskeletons by simultaneously binding actin filaments and the C-terminal cytoplasmic tails of adhesion molecules (type I membrane proteins). ERM proteins also bind neutral ...

    ERM (Ezrin/Radixin/Moesin) proteins mediate formation of membrane-associated cytoskeletons by simultaneously binding actin filaments and the C-terminal cytoplasmic tails of adhesion molecules (type I membrane proteins). ERM proteins also bind neutral endopeptidase 24.11 (NEP), a type II membrane protein, even though the N-terminal cytoplasmic tail of NEP possesses the opposite peptide polarity to that of type I membrane proteins. Here, we determined the crystal structure of the radixin FERM (Four point one and ERM) domain complexed with the N-terminal NEP cytoplasmic peptide. In the FERM-NEP complex, the amphipathic region of the peptide forms a beta strand followed by a hairpin that bind to a shallow groove of FERM subdomain C. NEP binding is stabilized by beta-beta interactions and docking of the NEP hairpin into the hydrophobic pocket of subdomain C. Whereas the binding site of NEP on the FERM domain overlaps with the binding site of intercellular adhesion molecule (ICAM)-2, NEP lacks the Motif-1 sequence conserved in ICAM-2 and related adhesion molecules. The NEP hairpin, although lacking the typical inter-chain hydrogen bond but is stabilized by hydrogen bonds with the main chain and side chains of subdomain C, directs the C-terminal basic region of the NEP peptide away from the groove and toward the membrane. The overlap of the binding sites on subdomain C for NEP and Motif-1 adhesion molecules such as CD44 provides the structural basis for the suppression of cell adhesion through interaction between NEP and ERM proteins.


    Related Citations: 
    • Structural basis for NHERF recognition by ERM proteins
      Terawaki, S.,Maesaki, R.,Hakoshima, T.
      (2006) Structure 14: 777
    • Structural basis of adhesion-molecule recognition by ERM proteins revealed by the crystal structure of the radixin-ICAM-2 complex
      Hamada, K.,Shimizu, T.,Yonemura, S.,Tsukita, S.,Tsukita, S.,Hakoshima, T.
      (2003) Embo J. 22: 502
    • 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


    Organizational Affiliation

    Structural Biology Laboratory, Nara Institute of Science and Technology, and CREST, Japan Science and Technology Agency, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Radixin
A, B, C
312Mus musculusMutation(s): 0 
Gene Names: Rdx
Find proteins for P26043 (Mus musculus)
Go to UniProtKB:  P26043
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Neprilysin
D, E, F
22Mus musculusMutation(s): 0 
Gene Names: Mme
EC: 3.4.24.11
Find proteins for Q61391 (Mus musculus)
Go to UniProtKB:  Q61391
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.233 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 108.790α = 90.00
b = 116.838β = 90.00
c = 141.884γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
HKL-2000data reduction
HKL-2000data scaling
REFMACrefinement
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-04-24
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance