2QJZ

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.25 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 

wwPDB Validation   3D Report Full Report


This is version 1.3 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: https://doi.org/10.1016/j.molcel.2007.07.023
  • Primary Citation of Related Structures:  
    2QJX, 2QJZ, 2QK0, 2QK1, 2QK2

  • 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. 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)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Microtubule-associated protein RP/EB family member 1
A, B
123Homo sapiensMutation(s): 4 
Gene Names: MAPRE1
UniProt & NIH Common Fund Data Resources
Find proteins for Q15691 (Homo sapiens)
Explore Q15691 
Go to UniProtKB:  Q15691
PHAROS:  Q15691
GTEx:  ENSG00000101367 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ15691
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.25 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 29.334α = 90
b = 65.22β = 96.24
c = 63.091γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
CNSphasing
CNSrefinement
DENZOdata reduction
PDB_EXTRACTdata extraction
Blu-Icedata collection

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

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
  • Version 1.3: 2019-07-24
    Changes: Data collection, Derived calculations, Refinement description