2MQ1

Phosphotyrosine binding domain


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 20 
  • Selection Criteria: all calculated structures submitted 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Dimeric switch of Hakai-truncated monomers during substrate recognition: insights from solution studies and NMR structure.

Mukherjee, M.Jing-Song, F.Ramachandran, S.Guy, G.R.Sivaraman, J.

(2014) J.Biol.Chem. 289: 25611-25623

  • DOI: 10.1074/jbc.M114.592840

  • PubMed Abstract: 
  • Hakai, an E3 ubiquitin ligase, disrupts cell-cell contacts in epithelial cells and is up-regulated in human colon and gastric adenocarcinomas. Hakai acts through its phosphotyrosine-binding (HYB) domain, which bears a dimeric fold that recognizes the ...

    Hakai, an E3 ubiquitin ligase, disrupts cell-cell contacts in epithelial cells and is up-regulated in human colon and gastric adenocarcinomas. Hakai acts through its phosphotyrosine-binding (HYB) domain, which bears a dimeric fold that recognizes the phosphotyrosine motifs of E-cadherin, cortactin, DOK1, and other Src substrates. Unlike the monomeric nature of the SH2 and phosphotyrosine-binding domains, the architecture of the HYB domain consists of an atypical, zinc-coordinated tight homodimer. Here, we report a C-terminal truncation mutant of the HYB domain (HYB(ΔC)), comprising amino acids 106-194, which exists as a monomer in solution. The NMR structure revealed that this deletion mutant undergoes a dramatic structural change caused by a rearrangement of the atypical zinc-coordinated unit in the C terminus of the HYB domain to a C2H2-like zinc finger in HYB(ΔC). Moreover, using isothermal titration calorimetry, we show that dimerization of HYB(ΔC) can be induced using a phosphotyrosine substrate peptide. This ligand-induced dimerization of HYB(ΔC) is further validated using analytical ultracentrifugation, size-exclusion chromatography, NMR relaxation studies, dynamic light scattering, and circular dichroism experiments. Overall, these observations suggest that the dimeric architecture of the HYB domain is essential for the phosphotyrosine-binding property of Hakai.


    Organizational Affiliation

    From the Department of Biological Sciences, 14 Science Drive 4, National University of Singapore, Singapore 117543 and.,the Institute of Molecular and Cell Biology, 61 Biopolis Drive, Proteos, Singapore 138673.,From the Department of Biological Sciences, 14 Science Drive 4, National University of Singapore, Singapore 117543 and dbsjayar@nus.edu.sg.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
E3 ubiquitin-protein ligase Hakai
A
89Mus musculusMutation(s): 0 
Gene Names: Cbll1 (Hakai)
EC: 2.3.2.27
Find proteins for Q9JIY2 (Mus musculus)
Go to UniProtKB:  Q9JIY2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 20 
  • Selection Criteria: all calculated structures submitted 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-08-06
    Type: Initial release
  • Version 1.1: 2019-12-18
    Type: Data collection, Database references