Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 9.54 kDa 
• Atom Count: 672 
• Residue Count: 88 
• Unique protein chains: 1

2L2T

Solution NMR structure of the ErbB4 dimeric membrane domain

• DOI: 10.2210/pdb2L2T/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-08-27 Released: 2011-09-14 
• Deposition Author(s): Mineev, K.S., Bocharov, E.V., Goncharuk, M.V., Arseniev, A.S.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: target function 

Literature

Structural and thermodynamic insight into the process of "weak" dimerization of the ErbB4 transmembrane domain by solution NMR.

Bocharov, E.V., Mineev, K.S., Goncharuk, M.V., Arseniev, A.S.

(2012) Biochim Biophys Acta 1818: 2158-2170

• PubMed: 22579757 
• DOI: 10.1016/j.bbamem.2012.05.001
• Primary Citation of Related Structures:  
  2L2T, 2LCX


• PubMed Abstract: 
  

Specific helix-helix interactions between the single-span transmembrane domains of receptor tyrosine kinases are believed to be important for their lateral dimerization and signal transduction. Establishing structure-function relationships requires precise structural-dynamic information about this class of biologically significant bitopic membrane proteins. ErbB4 is a ubiquitously expressed member of the HER/ErbB family of growth factor receptor tyrosine kinases that is essential for the normal development of various adult and fetal human tissues and plays a role in the pathobiology of the organism. The dimerization of the ErbB4 transmembrane domain in membrane-mimicking lipid bicelles was investigated by solution NMR. In a bicellar DMPC/DHPC environment, the ErbB4 membrane-spanning α-helices (651-678)(2) form a right-handed parallel dimer through the N-terminal double GG4-like motif A(655)GxxGG(660) in a fashion that is believed to permit proper kinase domain activation. During helix association, the dimer subunits undergo a structural adjustment (slight bending) with the formation of a network of inter-monomeric polar contacts. The quantitative analysis of the observed monomer-dimer equilibrium provides insights into the kinetics and thermodynamics of the folding process of the helical transmembrane domain in the model environment that may be directly relevant to the process that occurs in biological membranes. The lipid bicelles occupied by a single ErbB4 transmembrane domain behave as a true ("ideal") solvent for the peptide, while multiply occupied bicelles are more similar to the ordered lipid microdomains of cellular membranes and appear to provide substantial entropic enhancement of the weak helix-helix interactions, which may be critical for membrane protein activity.

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Organizational Affiliation: 

Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Moscow, Russian Federation. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Receptor tyrosine-protein kinase erbB-4	A, B	44	Homo sapiens	Mutation(s): 0  Gene Names: ERBB4, HER4 EC: 2.7.10.1
Find proteins for Q15303 (Homo sapiens) Explore Q15303  Go to UniProtKB:  Q15303
NIH Common Fund Data Resources
PHAROS:  Q15303 GTEx:  ENSG00000178568

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: target function 
• OLDERADO: 2L2T Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-08-27 
• Released Date: 2011-09-14 
Deposition Author(s): Mineev, K.S., Bocharov, E.V., Goncharuk, M.V., Arseniev, A.S.

Revision History 

• Version 1.0: 2011-09-14
  Type: Initial release
  
• Version 1.1: 2017-09-06
  Changes: Database references