4FFB

A TOG:alpha/beta-tubulin Complex Structure Reveals Conformation-Based Mechanisms For a Microtubule Polymerase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.882 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A TOG: alpha beta-tubulin complex structure reveals conformation-based mechanisms for a microtubule polymerase.

Ayaz, P.Ye, X.Huddleston, P.Brautigam, C.A.Rice, L.M.

(2012) Science 337: 857-860

  • DOI: 10.1126/science.1221698

  • PubMed Abstract: 
  • Stu2p/XMAP215/Dis1 family proteins are evolutionarily conserved regulatory factors that use αβ-tubulin-interacting tumor overexpressed gene (TOG) domains to catalyze fast microtubule growth. Catalysis requires that these polymerases discriminate betw ...

    Stu2p/XMAP215/Dis1 family proteins are evolutionarily conserved regulatory factors that use αβ-tubulin-interacting tumor overexpressed gene (TOG) domains to catalyze fast microtubule growth. Catalysis requires that these polymerases discriminate between unpolymerized and polymerized forms of αβ-tubulin, but the mechanism by which they do so has remained unclear. Here, we report the structure of the TOG1 domain from Stu2p bound to yeast αβ-tubulin. TOG1 binds αβ-tubulin in a way that excludes equivalent binding of a second TOG domain. Furthermore, TOG1 preferentially binds a curved conformation of αβ-tubulin that cannot be incorporated into microtubules, contacting α- and β-tubulin surfaces that do not participate in microtubule assembly. Conformation-selective interactions with αβ-tubulin explain how TOG-containing polymerases discriminate between unpolymerized and polymerized forms of αβ-tubulin and how they selectively recognize the growing end of the microtubule.


    Organizational Affiliation

    Department of Biophysics, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX 75390, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tubulin alpha-1 chain
A
447Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: TUB1
Find proteins for P09733 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P09733
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tubulin beta chain
B
463Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 2 
Gene Names: TUB2
Find proteins for P02557 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P02557
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Protein STU2
C
278Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: STU2
Find proteins for P46675 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P46675
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP

Download SDF File 
Download CCD File 
A, B
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.882 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.207 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 89.120α = 90.00
b = 98.040β = 100.31
c = 91.366γ = 90.00
Software Package:
Software NamePurpose
HKL-3000data reduction
PHENIXrefinement
HKL-3000data scaling
SBC-Collectdata collection
PHENIXphasing
PHENIXmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-08-15
    Type: Initial release
  • Version 1.1: 2013-08-28
    Type: Database references