Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 17.23 kDa 
• Atom Count: 1071 
• Modelled Residue Count: 127 
• Deposited Residue Count: 152 
• Unique protein chains: 1

1YIG

Crystal Structure of the Human EB1 C-terminal Dimerization Domain

• DOI: 10.2210/pdb1YIG/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2005-01-11 Released: 2005-03-08 
• Deposition Author(s): Slep, K.C., Rogers, S.L., Elliott, S.L., Ohkura, H., Kolodziej, P.A., Vale, R.D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.251 
• R-Value Work: 0.219 
• R-Value Observed: 0.222 

Literature

Structural determinants for EB1-mediated recruitment of APC and spectraplakins to the microtubule plus end

Slep, K.C., Rogers, S.L., Elliott, S.L., Ohkura, H., Kolodziej, P.A., Vale, R.D.

(2005) J Cell Biol 168: 587-598

• PubMed: 15699215 
• DOI: 10.1083/jcb.200410114
• Primary Citation of Related Structures:  
  1YIG, 1YIB


• PubMed Abstract: 
  

EB1 is a member of a conserved protein family that localizes to growing microtubule plus ends. EB1 proteins also recruit cell polarity and signaling molecules to microtubule tips. However, the mechanism by which EB1 recognizes cargo is unknown. Here, we have defined a repeat sequence in adenomatous polyposis coli (APC) that binds to EB1's COOH-terminal domain and identified a similar sequence in members of the microtubule actin cross-linking factor (MACF) family of spectraplakins. We show that MACFs directly bind EB1 and exhibit EB1-dependent plus end tracking in vivo. To understand how EB1 recognizes APC and MACFs, we solved the crystal structure of the EB1 COOH-terminal domain. The structure reveals a novel homodimeric fold comprised of a coiled coil and four-helix bundle motif. Mutational analysis reveals that the cargo binding site for MACFs maps to a cluster of conserved residues at the junction between the coiled coil and four-helix bundle. These results provide a structural understanding of how EB1 binds two regulators of microtubule-based cell polarity.

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Organizational Affiliation: 

The Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA 94107, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Microtubule-associated protein RP/EB family member 1	A, B	76	Homo sapiens	Mutation(s): 2  Gene Names: MAPRE1
Find proteins for Q15691 (Homo sapiens) Explore Q15691  Go to UniProtKB:  Q15691
NIH Common Fund Data Resources
PHAROS:  Q15691 GTEx:  ENSG00000101367

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A,B	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.251 
• R-Value Work: 0.219 
• R-Value Observed: 0.222 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 32.981	α = 90
b = 37.335	β = 106.06
c = 56.776	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-01-11 
• Released Date: 2005-03-08 
Deposition Author(s): Slep, K.C., Rogers, S.L., Elliott, S.L., Ohkura, H., Kolodziej, P.A., Vale, R.D.

Revision History  

• Version 1.0: 2005-03-08
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance