2QK1

Structural Basis of Microtubule Plus End Tracking by XMAP215, CLIP-170 and EB1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.173 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural Basis of Microtubule Plus End Tracking by XMAP215, CLIP-170, and EB1.

Slep, K.C.Vale, R.D.

(2007) Mol Cell 27: 976-991

  • DOI: 10.1016/j.molcel.2007.07.023
  • Primary Citation of Related Structures:  
    2QK2, 2QK1, 2QK0, 2QJZ, 2QJX

  • PubMed Abstract: 
  • Microtubule plus end binding proteins (+TIPs) localize to the dynamic plus ends of microtubules, where they stimulate microtubule growth and recruit signaling molecules. Three main +TIP classes have been identified (XMAP215, EB1, and CLIP-170), but whether they act upon microtubule plus ends through a similar mechanism has not been resolved ...

    Microtubule plus end binding proteins (+TIPs) localize to the dynamic plus ends of microtubules, where they stimulate microtubule growth and recruit signaling molecules. Three main +TIP classes have been identified (XMAP215, EB1, and CLIP-170), but whether they act upon microtubule plus ends through a similar mechanism has not been resolved. Here, we report crystal structures of the tubulin binding domains of XMAP215 (yeast Stu2p and Drosophila Msps), EB1 (yeast Bim1p and human EB1), and CLIP-170 (human), which reveal diverse tubulin binding interfaces. Functional studies, however, reveal a common property that native or artificial dimerization of tubulin binding domains (including chemically induced heterodimers of EB1 and CLIP-170) induces tubulin nucleation/assembly in vitro and, in most cases, plus end tracking in living cells. We propose that +TIPs, although diverse in structure, share a common property of multimerizing tubulin, thus acting as polymerization chaperones that aid in subunit addition to the microtubule plus end.


    Organizational Affiliation

    Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein STU2A249Saccharomyces cerevisiaeMutation(s): 6 
Gene Names: STU2
UniProt
Find proteins for P46675 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P46675 
Go to UniProtKB:  P46675
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
AL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.173 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 28.441α = 90
b = 80.649β = 90
c = 97.919γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing
CNSrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2007-07-10 
  • Released Date: 2007-10-02 
  • Deposition Author(s): Slep, K.C., Vale, R.D.

Revision History  (Full details and data files)

  • Version 1.0: 2007-10-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-18
    Changes: Refinement description