Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

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

Macromolecule Content

• Total Structure Weight: 19.23 kDa 
• Atom Count: 652 
• Modelled Residue Count: 83 
• Deposited Residue Count: 177 
• Unique protein chains: 1

4CGC

Crystal structure of the trimerization domain of human EML4

• DOI: 10.2210/pdb4CGC/pdb

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


• Deposited: 2013-11-21 Released: 2014-12-10 
• Deposition Author(s): Richards, M.W., Bayliss, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.291 
• R-Value Work: 0.268 
• R-Value Observed: 0.269 

Literature

Microtubule Association of Eml Proteins and the Eml4-Alk Variant 3 Oncoprotein Require an N-Terminal Trimerization Domain.

Richards, M.W., O'Regan, L., Roth, D., Montgomery, J.M., Straube, A., Fry, A.M., Bayliss, R.

(2015) Biochem J 467: 529

• PubMed: 25740311 
• DOI: 10.1042/BJ20150039
• Primary Citation of Related Structures:  
  4CGB, 4CGC


• PubMed Abstract: 
  

Proteins of the echinoderm microtubule (MT)-associated protein (EMAP)-like (EML) family contribute to formation of the mitotic spindle and interphase MT network. EML1-4 consist of Trp-Asp 40 (WD40) repeats and an N-terminal region containing a putative coiled-coil. Recurrent gene rearrangements in non-small cell lung cancer (NSCLC) fuse EML4 to anaplastic lymphoma kinase (ALK) causing expression of several oncogenic fusion variants. The fusions have constitutive ALK activity due to self-association through the EML4 coiled-coil. We have determined crystal structures of the coiled-coils from EML2 and EML4, which describe the structural basis of both EML self-association and oncogenic EML4-ALK activation. The structures reveal a trimeric oligomerization state directed by a conserved pattern of hydrophobic residues and salt bridges. We show that the trimerization domain (TD) of EML1 is necessary and sufficient for self-association. The TD is also essential for MT binding; however, this property requires an adjacent basic region. These observations prompted us to investigate MT association of EML4-ALK and EML1-ABL1 (Abelson 1) fusions in which variable portions of the EML component are present. Uniquely, EML4-ALK variant 3, which includes the TD and basic region of EML4 but none of the WD40 repeats, was localized to MTs, both when expressed recombinantly and when expressed in a patient-derived NSCLC cell line (H2228). This raises the question of whether the mislocalization of ALK activity to MTs might influence downstream signalling and malignant properties of cells. Furthermore, the structure of EML4 TD may enable the development of protein-protein interaction inhibitors targeting the trimerization interface, providing a possible avenue towards therapeutic intervention in EML4-ALK NSCLC.

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Organizational Affiliation: 

*Department of Biochemistry, University of Leicester, Henry Wellcome Building, Lancaster Road, Leicester LE1 9HN, U.K.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ECHINODERM MICROTUBULE-ASSOCIATED PROTEIN-LIKE 4	A, B, C	59	Homo sapiens	Mutation(s): 1  Gene Names: EML4, C2orf2, EMAPL4
UniProt & NIH Common Fund Data Resources
Find proteins for Q9HC35 (Homo sapiens) Explore Q9HC35  Go to UniProtKB:  Q9HC35
PHAROS:  Q9HC35 GTEx:  ENSG00000143924

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.291 
• R-Value Work: 0.268 
• R-Value Observed: 0.269 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 67.491	α = 90
b = 67.491	β = 90
c = 50.6	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling
SCALA	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-11-21 
• Released Date: 2014-12-10 
Deposition Author(s): Richards, M.W., Bayliss, R.

Revision History  

• Version 1.0: 2014-12-10
  Type: Initial release
  
• Version 1.1: 2015-03-18
  Changes: Database references
• Version 1.2: 2015-04-29
  Changes: Database references