4QMH

The XMAP215 family drives microtubule polymerization using a structurally diverse TOG array


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.157 
  • R-Value Observed: 0.159 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The XMAP215 family drives microtubule polymerization using a structurally diverse TOG array.

Fox, J.C.Howard, A.E.Currie, J.D.Rogers, S.L.Slep, K.C.

(2014) Mol Biol Cell 25: 2375-2392

  • DOI: 10.1091/mbc.E13-08-0501
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • XMAP215 family members are potent microtubule (MT) polymerases, with mutants displaying reduced MT growth rates and aberrant spindle morphologies. XMAP215 proteins contain arrayed tumor overexpressed gene (TOG) domains that bind tubulin. Whether thes ...

    XMAP215 family members are potent microtubule (MT) polymerases, with mutants displaying reduced MT growth rates and aberrant spindle morphologies. XMAP215 proteins contain arrayed tumor overexpressed gene (TOG) domains that bind tubulin. Whether these TOG domains are architecturally equivalent is unknown. Here we present crystal structures of TOG4 from Drosophila Msps and human ch-TOG. These TOG4 structures architecturally depart from the structures of TOG domains 1 and 2, revealing a conserved domain bend that predicts a novel engagement with α-tubulin. In vitro assays show differential tubulin-binding affinities across the TOG array, as well as differential effects on MT polymerization. We used Drosophila S2 cells depleted of endogenous Msps to assess the importance of individual TOG domains. Whereas a TOG1-4 array largely rescues MT polymerization rates, mutating tubulin-binding determinants in any single TOG domain dramatically reduces rescue activity. Our work highlights the structurally diverse yet positionally conserved TOG array that drives MT polymerization.


    Organizational Affiliation

    Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 kslep@bio.unc.edu.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LP04448p
A
241Drosophila melanogasterMutation(s): 0 
Gene Names: CG5000CG5000 Dmel_CG5000Dmel_CG5000msps
Find proteins for Q9VEZ3 (Drosophila melanogaster)
Go to UniProtKB:  Q9VEZ3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.157 
  • R-Value Observed: 0.159 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 31.788α = 100.05
b = 32.613β = 95.23
c = 59.795γ = 109.95
Software Package:
Software NamePurpose
ADSCdata collection
PHENIXmodel building
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-09
    Type: Initial release
  • Version 1.1: 2014-09-03
    Changes: Database references