PDBsum entry 3hb1

Go to PDB code: 
protein ligands metals Protein-protein interface(s) links
Hydrolase PDB id
Protein chain
258 a.a. *
AF3 ×4
_MG ×4
Waters ×143
* Residue conservation analysis
PDB id:
Name: Hydrolase
Title: Crystal structure of ed-eya2 complexed with alf3
Structure: Eyes absent homolog 2 (drosophila). Chain: a, b, c, d. Fragment: eya domain. Engineered: yes
Source: Homo sapiens. Human. Organism_taxid: 9606. Expressed in: escherichia coli. Expression_system_taxid: 562
2.51Å     R-factor:   0.200     R-free:   0.240
Authors: S.K.Jung,D.G.Jeong,S.E.Ryu,S.J.Kim
Key ref: S.K.Jung et al. (2010). Crystal structure of ED-Eya2: insight into dual roles as a protein tyrosine phosphatase and a transcription factor. FASEB J, 24, 560-569. PubMed id: 19858093 DOI: 10.1096/fj.09-143891
03-May-09     Release date:   01-Dec-09    
Go to PROCHECK summary

Protein chains
O00167  (EYA2_HUMAN) -  Eyes absent homolog 2
538 a.a.
258 a.a.*
Key:    Secondary structure  CATH domain
* PDB and UniProt seqs differ at 3 residue positions (black crosses)

 Enzyme reactions 
   Enzyme class: E.C.  - Protein-tyrosine-phosphatase.
[IntEnz]   [ExPASy]   [KEGG]   [BRENDA]
      Reaction: Protein tyrosine phosphate + H2O = protein tyrosine + phosphate
Protein tyrosine phosphate
+ H(2)O
= protein tyrosine
+ phosphate
Molecule diagrams generated from .mol files obtained from the KEGG ftp site
 Gene Ontology (GO) functional annotation 
  GO annot!
  Biological process     multicellular organismal development   2 terms 
  Biochemical function     protein tyrosine phosphatase activity     1 term  


DOI no: 10.1096/fj.09-143891 FASEB J 24:560-569 (2010)
PubMed id: 19858093  
Crystal structure of ED-Eya2: insight into dual roles as a protein tyrosine phosphatase and a transcription factor.
S.K.Jung, D.G.Jeong, S.J.Chung, J.H.Kim, B.C.Park, N.K.Tonks, S.E.Ryu, S.J.Kim.
Eya proteins are transcription factors that play pivotal roles in organ formation during development by mediating interactions between Sine Oculis (SO) and Dachshund (DAC). Remarkably, the transcriptional activity of Eya proteins is regulated by a dephosphorylating activity within its Eya domain (ED). However, the molecular basis for the link between catalytic and transcriptional activities remains unclear. Here we report the first description of the crystal structure of the ED of human Eya2 (ED-Eya2), determined at 2.4-A resolution. In stark contrast to other members of the haloacid dehalogenase (HAD) family to which ED-Eya2 belongs, the helix-bundle motif (HBM) is elongated along the back of the catalytic site. This not only results in a structure that accommodates large protein substrates but also positions the catalytic and the SO-interacting sites on opposite faces, which suggests that SO binding is not directly affected by catalytic function. Based on the observation that the DAC-binding site is located between the catalytic core and SO binding sites within ED-Eya2, we propose that catalytic activity can be translated to SO binding through DAC, which acts as a transcriptional switch. We also captured at two stages of reaction cycles-acyl-phosphate intermediate and transition state of hydrolysis step, which provided a detailed view of reaction mechanism. The ED-Eya2 structure defined here serves as a model for other members of the Eya family and provides a framework for understanding the role of Eya phosphatase mutations in disease.