4P4U

Nucleotide-free stalkless-MxA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Transient Dimerization of Human MxA Promotes GTP Hydrolysis, Resulting in a Mechanical Power Stroke.

Rennie, M.L.McKelvie, S.A.Bulloch, E.M.Kingston, R.L.

(2014) Structure 22: 1433-1445

  • DOI: 10.1016/j.str.2014.08.015
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Myxovirus resistance (Mx) proteins restrict replication of numerous viruses. They are closely related to membrane-remodeling fission GTPases, such as dynamin. Mx proteins can tubulate lipids and form rings or filaments that may interact directly with ...

    Myxovirus resistance (Mx) proteins restrict replication of numerous viruses. They are closely related to membrane-remodeling fission GTPases, such as dynamin. Mx proteins can tubulate lipids and form rings or filaments that may interact directly with viral structures. GTPase domain dimerization is thought to allow crosstalk between the rungs of a tubular or helical assembly, facilitating constriction. We demonstrate that the GTPase domain of MxA dimerizes to facilitate catalysis, in a fashion analogous to dynamin. GTP binding is associated with the lever-like movement of structures adjacent to the GTPase domain, while GTP hydrolysis returns MxA to its resting state. Dimerization is not significantly promoted by substrate binding and occurs only transiently, yet is central to catalytic efficiency. Therefore, we suggest dimerization functions to coordinate the activity of spatially adjacent Mx molecules within an assembly, allowing their mechanical power strokes to be synchronized at key points in the contractile cycle.


    Organizational Affiliation

    Maurice Wilkins Centre, School of Biological Sciences, University of Auckland, Auckland 1010, New Zealand.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interferon-induced GTP-binding protein Mx1
A
363Homo sapiensMutation(s): 3 
Gene Names: MX1
Find proteins for P20591 (Homo sapiens)
Go to Gene View: MX1
Go to UniProtKB:  P20591
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.210 
  • Space Group: I 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.330α = 90.00
b = 77.000β = 90.00
c = 205.950γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Maurice Wilkins Centre, Auckland Medical Research FoundationNew Zealand--

Revision History 

  • Version 1.0: 2014-11-05
    Type: Initial release
  • Version 1.1: 2016-07-20
    Type: Data collection