2H1X

Crystal structure of 5-hydroxyisourate Hydrolase (formerly known as TRP, Transthyretin Related Protein)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of Zebra fish HIUase: Insights into Evolution of an Enzyme to a Hormone Transporter.

Zanotti, G.Cendron, L.Ramazzina, I.Folli, C.Percudani, R.Berni, R.

(2006) J Mol Biol 363: 1-9

  • DOI: 10.1016/j.jmb.2006.07.079
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • During early vertebrate evolution, a duplication event in the gene encoding 5-hydroxyisourate hydrolase (HIUase), a widely distributed enzyme of purine metabolism, gave rise to transthyretin (TTR), a thyroid hormone transporter. We report here on the ...

    During early vertebrate evolution, a duplication event in the gene encoding 5-hydroxyisourate hydrolase (HIUase), a widely distributed enzyme of purine metabolism, gave rise to transthyretin (TTR), a thyroid hormone transporter. We report here on the crystal structure of zebra fish HIUase in two different crystal forms. Despite the phylogenetic distance, this structure compares well with those of newly characterized bacterial HIUases, especially with regard to catalytic regions, which are highly preserved. Comparison with TTR structure reveals a highly conserved scaffold, harbouring distinct functional sites located in the same regions of the two vertebrate proteins. Residues that are differentially conserved in HIUases compared to TTR map in putative catalytic regions occupying significant portions of the two halves of a central channel that transverses the whole TTR protein. The evolution of TTR has been accompanied by remarkable changes of the HIUase active sites that gave rise to a channel open at both ends, thus allowing free access to hormone molecules.


    Related Citations: 
    • Completing the uric acid degradation pathway through phylogenetic comparison of whole genomes
      Ramazzina, I., Folli, C., Secchi, A., Berni, R., Percudani, R.
      (2006) Nat Chem Biol 2: 144

    Organizational Affiliation

    Department of Chemistry, University of Padua, and ICTB, Section of Padua, Via Marzolo 1 35131 Padova, Italy. giuseppe.zanotti@unipd.it



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
5-hydroxyisourate Hydrolase (formerly known as TRP, Transthyretin Related Protein)A, B, C, D119Danio rerioMutation(s): 2 
Gene Names: GeneID:558664urah
EC: 3.5.2.17
Find proteins for Q06S87 (Danio rerio)
Explore Q06S87 
Go to UniProtKB:  Q06S87
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.078α = 90
b = 64.135β = 94
c = 58.937γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
MOSFLMdata reduction
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-10-31
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance