4FFB

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.88 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 

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
  • Primary Citation of Related Structures:  
    4FFB

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin alpha-1 chainA447Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: TUB1YML085C
Find proteins for P09733 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P09733 
Go to UniProtKB:  P09733
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin beta chainB463Saccharomyces cerevisiae S288CMutation(s): 2 
Gene Names: TUB2YFL037W
EC: 3.6.5.6
Find proteins for P02557 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P02557 
Go to UniProtKB:  P02557
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Protein STU2C278Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: L2108STU2YLR045C
Find proteins for P46675 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P46675 
Go to UniProtKB:  P46675
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP

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

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.88 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.12α = 90
b = 98.04β = 100.31
c = 91.366γ = 90
Software Package:
Software NamePurpose
SBC-Collectdata collection
PHENIXmodel building
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

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