Discovery and characterization of thermophilic limonene-1,2-epoxide hydrolases from hot spring metagenomic libraries. Tomsk-sample- Valpromide complex

Experimental Data Snapshot

  • Resolution: 1.16 Å
  • R-Value Free: 0.133 
  • R-Value Work: 0.108 
  • R-Value Observed: 0.109 

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Discovery and Characterization of Thermophilic Limonene-1,2-Epoxide Hydrolases from Hot Spring Metagenomic Libraries

Ferrandi, E.E.Sayer, C.Isupov, M.N.Annovazzi, C.Marchesi, C.Iacobone, G.Peng, X.Bonch-Osmolovskaya, E.Wohlgemuth, R.Littlechild, J.A.Montia, D.

(2015) FEBS J 282: 2879

  • DOI: https://doi.org/10.1111/febs.13328
  • Primary Citation of Related Structures:  
    5AIF, 5AIG, 5AIH, 5AII

  • PubMed Abstract: 

    The epoxide hydrolases (EHs) represent an attractive option for the synthesis of chiral epoxides and 1,2-diols which are valuable building blocks for the synthesis of several pharmaceutical compounds. A metagenomic approach has been used to identify two new members of the atypical EH limonene-1,2-epoxide hydrolase (LEH) family of enzymes. These two LEHs (Tomsk-LEH and CH55-LEH) show EH activities towards different epoxide substrates, differing in most cases from those previously identified for Rhodococcus erythropolis (Re-LEH) in terms of stereoselectivity. Tomsk-LEH and CH55-LEH, both from thermophilic sources, have higher optimal temperatures and apparent melting temperatures than Re-LEH. The new LEH enzymes have been crystallized and their structures solved to high resolution in the native form and in complex with the inhibitor valpromide for Tomsk-LEH and poly(ethylene glycol) for CH55-LEH. The structural analysis has provided insights into the LEH mechanism, substrate specificity and stereoselectivity of these new LEH enzymes, which has been supported by mutagenesis studies.

  • Organizational Affiliation

    Istituto di Chimica del Riconoscimento Molecolare, C.N.R., Milano, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
125unidentifiedMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.16 Å
  • R-Value Free: 0.133 
  • R-Value Work: 0.108 
  • R-Value Observed: 0.109 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.46α = 90
b = 96.46β = 90
c = 56.94γ = 120
Software Package:
Software NamePurpose

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2015-06-17
    Type: Initial release
  • Version 1.1: 2015-07-22
    Changes: Database references
  • Version 1.2: 2015-08-12
    Changes: Database references
  • Version 1.3: 2017-09-13
    Changes: Data collection
  • Version 1.4: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description