1PA7

Crystal structure of amino-terminal microtubule binding domain of EB1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the amino-terminal microtubule-binding domain of end-binding protein 1 (EB1)

Hayashi, I.Ikura, M.

(2003) J.Biol.Chem. 278: 36430-36434

  • DOI: 10.1074/jbc.M305773200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The end-binding protein 1 (EB1) family is a highly conserved group of proteins that localizes to the plus-ends of microtubules. EB1 has been shown to play an important role in regulating microtubule dynamics and chromosome segregation, but its regula ...

    The end-binding protein 1 (EB1) family is a highly conserved group of proteins that localizes to the plus-ends of microtubules. EB1 has been shown to play an important role in regulating microtubule dynamics and chromosome segregation, but its regulation mechanism is poorly understood. We have determined the 1.45-A resolution crystal structure of the amino-terminal domain of EB1, which is essential for microtubule binding, and show that it forms a calponin homology (CH) domain fold that is found in many proteins involved in the actin cytoskeleton. The functional CH domain for actin binding is a tandem pair, whereas EB1 is the first example of a single CH domain that can associate with the microtubule filament. Although our biochemical study shows that microtubule binding of EB1 is electrostatic in part, our mutational analysis suggests that the hydrophobic network, which is partially exposed in our crystal structure, is also important for the association. We propose that, like other actin-binding CH domains, EB1 employs the hydrophobic interaction to bind to microtubules.


    Organizational Affiliation

    Division of Molecular and Structural Biology, Ontario Cancer Institute and Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2M9, Canada. ihayashi@uhnres.utoronto.ca




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Microtubule-associated protein RP/EB family member 1
A
130Homo sapiensMutation(s): 0 
Gene Names: MAPRE1
Find proteins for Q15691 (Homo sapiens)
Go to Gene View: MAPRE1
Go to UniProtKB:  Q15691
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.173 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 31.856α = 90.00
b = 48.453β = 103.36
c = 44.968γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
DMphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2003-05-13 
  • Released Date: 2003-10-21 
  • Deposition Author(s): Hayashi, I., Ikura, M.

Revision History 

  • Version 1.0: 2003-10-21
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance