2H6U

Crystal structure of 5-hydroxyisourate hydrolase (formerly known as TRP, transthyretin related protein)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.225 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 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: https://doi.org/10.1016/j.jmb.2006.07.079
  • Primary Citation of Related Structures:  
    2H1X, 2H6U

  • 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 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.


  • 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
5-HYDROXYISOURATE HYDROLASE (FORMERLY KNOWN AS TRP, TRANSTHYRETIN RELATED PROTEIN)
A, B, C, D, E
A, B, C, D, E, F, G, H
119Danio rerioMutation(s): 2 
Gene Names: GENEID:558664
EC: 3.5.2.17
UniProt
Find proteins for Q06S87 (Danio rerio)
Explore Q06S87 
Go to UniProtKB:  Q06S87
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ06S87
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.225 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.324α = 90
b = 66.737β = 90
c = 237.393γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
CCP4data scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-10-31
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2021-10-20
    Changes: Database references
  • Version 1.4: 2023-08-30
    Changes: Data collection, Refinement description