1EF1

CRYSTAL STRUCTURE OF THE MOESIN FERM DOMAIN/TAIL DOMAIN COMPLEX

• PDB DOI:  https://doi.org/10.2210/pdb1EF1/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2000-02-04 Released: 2000-05-10 
• Deposition Author(s): Pearson, M.A., Reczek, D., Bretscher, A., Karplus, P.A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.287 
• R-Value Work: 0.227 

Literature

Structure of the ERM protein moesin reveals the FERM domain fold masked by an extended actin binding tail domain.

Pearson, M.A., Reczek, D., Bretscher, A., Karplus, P.A.

(2000) Cell 101: 259-270

• PubMed: 10847681 
• DOI: https://doi.org/10.1016/s0092-8674(00)80836-3
• Primary Citation of Related Structures:  
  1EF1


• PubMed Abstract: 
  

The ezrin-radixin-moesin (ERM) protein family link actin filaments of cell surface structures to the plasma membrane, using a C-terminal F-actin binding segment and an N-terminal FERM domain, a common membrane binding module. ERM proteins are regulated by an intramolecular association of the FERM and C-terminal tail domains that masks their binding sites. The crystal structure of a dormant moesin FERM/tail complex reveals that the FERM domain has three compact lobes including an integrated PTB/PH/ EVH1 fold, with the C-terminal segment bound as an extended peptide masking a large surface of the FERM domain. This extended binding mode suggests a novel mechanism for how different signals could produce varying levels of activation. Sequence conservation suggests a similar regulation of the tumor suppressor merlin.

---

Organizational Affiliation: 

Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York 14853, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 2 generated by PISA,PQS (software)

Biological Assembly 3  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 3 generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 91.02 kDa 
• Atom Count: 6,688 
• Modelled Residue Count: 768 
• Deposited Residue Count: 768 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MOESIN	A, C [auth B]	294	Homo sapiens	Mutation(s): 5  Gene Names: MSN
UniProt & NIH Common Fund Data Resources
Find proteins for P26038 (Homo sapiens) Explore P26038  Go to UniProtKB:  P26038
PHAROS:  P26038

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
MOESIN	B [auth C], D	90	Homo sapiens	Mutation(s): 3  Gene Names: MSN
UniProt & NIH Common Fund Data Resources
Find proteins for P26038 (Homo sapiens) Explore P26038  Go to UniProtKB:  P26038
PHAROS:  P26038

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	E [auth A], F [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, C [auth B]	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.287 
• R-Value Work: 0.227 
• Space Group: P 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 54.2	α = 90
b = 153.3	β = 90
c = 112.1	γ = 90

Software Package:

Software Name	Purpose
MADSYS	phasing
X-PLOR	refinement
MOSFLM	data reduction
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-05-10 
Deposition Author(s): Pearson, M.A., Reczek, D., Bretscher, A., Karplus, P.A.

Revision History  

• Version 1.0: 2000-05-10
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance