4QMJ

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.498 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.208 

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
  • Primary Citation of Related Structures:  

  • 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 Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599Graduate Program in Molecular and Cellular Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cytoskeleton-associated protein 5
A
240Homo sapiensMutation(s): 0 
Gene Names: CKAP5 (KIAA0097)
Find proteins for Q14008 (Homo sapiens)
Go to Gene View: CKAP5
Go to UniProtKB:  Q14008
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.498 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.208 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 79.125α = 90.00
b = 79.125β = 90.00
c = 68.499γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
SERGUIdata collection
PHENIXphasing
HKL-2000data scaling
PHENIXmodel building
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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