4RM9

Crystal structure of human ezrin in space group C2221


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural characterization suggests models for monomeric and dimeric forms of full-length ezrin.

Phang, J.M.Harrop, S.J.Duff, A.P.Sokolova, A.V.Crossett, B.Walsh, J.C.Beckham, S.A.Nguyen, C.D.Davies, R.B.Glockner, C.Bromley, E.H.Wilk, K.E.Curmi, P.M.

(2016) Biochem. J. 473: 2763-2782

  • DOI: 10.1042/BCJ20160541
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Ezrin is a member of the ERM (ezrin-radixin-moesin) family of proteins that have been conserved through metazoan evolution. These proteins have dormant and active forms, where the latter links the actin cytoskeleton to membranes. ERM proteins have th ...

    Ezrin is a member of the ERM (ezrin-radixin-moesin) family of proteins that have been conserved through metazoan evolution. These proteins have dormant and active forms, where the latter links the actin cytoskeleton to membranes. ERM proteins have three domains: an N-terminal FERM [band Four-point-one (4.1) ERM] domain comprising three subdomains (F1, F2, and F3); a helical domain; and a C-terminal actin-binding domain. In the dormant form, FERM and C-terminal domains form a stable complex. We have determined crystal structures of the active FERM domain and the dormant FERM:C-terminal domain complex of human ezrin. We observe a bistable array of phenylalanine residues in the core of subdomain F3 that is mobile in the active form and locked in the dormant form. As subdomain F3 is pivotal in binding membrane proteins and phospholipids, these transitions may facilitate activation and signaling. Full-length ezrin forms stable monomers and dimers. We used small-angle X-ray scattering to determine the solution structures of these species. As expected, the monomer shows a globular domain with a protruding helical coiled coil. The dimer shows an elongated dumbbell structure that is twice as long as the monomer. By aligning ERM sequences spanning metazoan evolution, we show that the central helical region is conserved, preserving the heptad repeat. Using this, we have built a dimer model where each monomer forms half of an elongated antiparallel coiled coil with domain-swapped FERM:C-terminal domain complexes at each end. The model suggests that ERM dimers may bind to actin in a parallel fashion.


    Organizational Affiliation

    School of Physics, The University of New South Wales, Sydney, NSW 2052, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ezrin
A
587Homo sapiensMutation(s): 0 
Gene Names: EZR (VIL2)
Find proteins for P15311 (Homo sapiens)
Go to Gene View: EZR
Go to UniProtKB:  P15311
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.209 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 67.433α = 90.00
b = 113.517β = 90.00
c = 111.773γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
Blu-Icedata collection
PHENIXrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-12-09
    Type: Initial release
  • Version 1.1: 2017-09-27
    Type: Database references, Refinement description