2QK0

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.233 
  • 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:  

  • 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 w ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CAP-Gly domain-containing linker protein 1
A
74Homo sapiensMutation(s): 1 
Gene Names: CLIP1 (CYLN1, RSN)
Find proteins for P30622 (Homo sapiens)
Go to Gene View: CLIP1
Go to UniProtKB:  P30622
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 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.173 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 27.242α = 90.00
b = 42.533β = 90.00
c = 51.806γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
PDB_EXTRACTdata extraction
REFMACrefinement
DENZOdata reduction
Blu-Icedata collection
CNSphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2007-07-09 
  • Released Date: 2007-10-02 
  • Deposition Author(s): Slep, K.C., Vale, R.D.

Revision History 

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