3SZR

Crystal structure of modified nucleotide-free human MxA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.262 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of myxovirus resistance protein a reveals intra- and intermolecular domain interactions required for the antiviral function.

Gao, S.von der Malsburg, A.Dick, A.Faelber, K.Schroder, G.F.Haller, O.Kochs, G.Daumke, O.

(2011) Immunity 35: 514-525

  • DOI: 10.1016/j.immuni.2011.07.012

  • PubMed Abstract: 
  • Human myxovirus resistance protein 1 (MxA) is an interferon-induced dynamin-like GTPase that acts as a cell-autonomous host restriction factor against many viral pathogens including influenza viruses. To study the molecular principles of its antivira ...

    Human myxovirus resistance protein 1 (MxA) is an interferon-induced dynamin-like GTPase that acts as a cell-autonomous host restriction factor against many viral pathogens including influenza viruses. To study the molecular principles of its antiviral activity, we determined the crystal structure of nucleotide-free MxA, which showed an extended three-domain architecture. The central bundle signaling element (BSE) connected the amino-terminal GTPase domain with the stalk via two hinge regions. MxA oligomerized in the crystal via the stalk and the BSE, which in turn interacted with the stalk of the neighboring monomer. We demonstrated that the intra- and intermolecular domain interplay between the BSE and stalk was essential for oligomerization and the antiviral function of MxA. Based on these results, we propose a structural model for the mechano-chemical coupling in ring-like MxA oligomers as the principle mechanism for this unique antiviral effector protein.


    Organizational Affiliation

    Max-Delbrück-Centrum for Molecular Medicine, Crystallography, Robert-Rössle-Strasse 10, 13125 Berlin, Germany. song.gao@mdc-berlin.de




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interferon-induced GTP-binding protein Mx1
A
608Homo sapiensMutation(s): 4 
Gene Names: MX1
Find proteins for P20591 (Homo sapiens)
Go to Gene View: MX1
Go to UniProtKB:  P20591
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.262 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 156.820α = 90.00
b = 134.080β = 106.34
c = 58.100γ = 90.00
Software Package:
Software NamePurpose
iMOSFLMdata reduction
REFMACrefinement
CNSrefinement
XDSdata reduction
PHASERphasing
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-07-19 
  • Released Date: 2011-10-12 
  • Deposition Author(s): Gao, S., Daumke, O.

Revision History 

  • Version 1.0: 2011-10-12
    Type: Initial release
  • Version 1.1: 2011-10-26
    Type: Database references
  • Version 1.2: 2011-11-16
    Type: Database references