Moesin from Spodoptera frugiperda at 2.1 angstroms resolution

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.176 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Self-masking in an Intact ERM-merlin Protein: An Active Role for the Central alpha-Helical Domain.

Li, Q.Nance, M.R.Kulikauskas, R.Nyberg, K.Fehon, R.Karplus, P.A.Bretscher, A.Tesmer, J.J.

(2007) J Mol Biol 365: 1446-1459

  • DOI: https://doi.org/10.1016/j.jmb.2006.10.075
  • Primary Citation of Related Structures:  
    2I1J, 2I1K

  • PubMed Abstract: 

    Ezrin/radixin/moesin (ERM) family members provide a regulated link between the cortical actin cytoskeleton and the plasma membrane to govern membrane structure and organization. Here, we report the crystal structure of intact insect moesin, revealing that its essential yet previously uncharacterized alpha-helical domain forms extensive interactions with conserved surfaces of the band four-point-one/ezrin/radixin/moesin (FERM) domain. These interdomain contacts provide a functional explanation for how PIP(2) binding and tyrosine phosphorylation of ezrin lead to activation, and provide an understanding of previously enigmatic loss-of-function missense mutations in the tumor suppressor merlin. Sequence conservation and biochemical results indicate that this structure represents a complete model for the closed state of all ERM-merlin proteins, wherein the central alpha-helical domain is an active participant in an extensive set of inhibitory interactions that can be unmasked, in a rheostat-like manner, by coincident regulatory factors that help determine cell polarity and membrane structure.

  • Organizational Affiliation

    Department of Chemistry and Biochemistry, Institute for Cellular and Molecular Biology, The University of Texas at Austin 1 University Station #A5300, Austin, TX 78712-0165, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Moesin575Spodoptera frugiperdaMutation(s): 0 
Find proteins for A0T1L9 (Spodoptera frugiperda)
Explore A0T1L9 
Go to UniProtKB:  A0T1L9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0T1L9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.176 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 123.739α = 90
b = 123.739β = 90
c = 283.183γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-12-19
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references, Derived calculations