Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 15402.82 
• Atom Count: 1097 
• Residue Count: 132 
• Unique protein chains: 1

3CO1

Crystal structure of microtubule binding domain of human EB3

• DOI: 10.2210/pdb3CO1/pdb

• Classification: PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2008-03-27 Released: 2009-03-17 
• Deposition Author(s): De Groot, C.O., Honnappa, S., Steinmetz, M.O.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.4 Å
• R-Value Free: 0.234 
• R-Value Work: 0.200 

Literature

Mammalian end binding proteins control persistent microtubule growth.

Komarova, Y., De Groot, C.O., Grigoriev, I., Gouveia, S.M., Munteanu, E.L., Schober, J.M., Honnappa, S., Buey, R.M., Hoogenraad, C.C., Dogterom, M., Borisy, G.G., Steinmetz, M.O., Akhmanova, A.

(2009) J.Cell Biol. --: --

• PubMed: 19255245 
• DOI: 10.1083/jcb.200807179


• PubMed Abstract: 
  

End binding proteins (EBs) are highly conserved core components of microtubule plus-end tracking protein networks. Here we investigated the roles of the three mammalian EBs in controlling microtubule dynamics and analyzed the domains involved. Protein depletion and rescue experiments showed that EB1 and EB3, but not EB2, promote persistent microtubule growth by suppressing catastrophes. Furthermore, we demonstrated in vitro and in cells that the EB plus-end tracking behavior depends on the calponin homology domain but does not require dimer formation. In contrast, dimerization is necessary for the EB anti-catastrophe activity in cells; this explains why the EB1 dimerization domain, which disrupts native EB dimers, exhibits a dominant-negative effect. When microtubule dynamics is reconstituted with purified tubulin, EBs promote rather than inhibit catastrophes, suggesting that in cells EBs prevent catastrophes by counteracting other microtubule regulators. This probably occurs through their action on microtubule ends, because catastrophe suppression does not require the EB domains needed for binding to known EB partners.

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Organizational Affiliation: 

Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, IL 60611, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Microtubule-associated protein RP/EB family member 3	A	132	Homo sapiens	Mutation(s): 0  Gene Names: MAPRE3
Find proteins for Q9UPY8 (Homo sapiens) Go to Gene View: MAPRE3 Go to UniProtKB:  Q9UPY8

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.4 Å
• R-Value Free: 0.234 
• R-Value Work: 0.200 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 47.188	α = 90.00
b = 85.365	β = 90.00
c = 32.161	γ = 90.00

Software Package:

Software Name	Purpose
REFMAC	refinement
PHASER	phasing
XDS	data scaling
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-03-27 
• Released Date: 2009-03-17 
• Deposition Author(s): De Groot, C.O., Honnappa, S., Steinmetz, M.O.

Revision History 

• Version 1.0: 2009-03-17
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Advisory, Version format compliance