The Crystal Structure of a Hyper-thermophilic Carboxylesterase from the Archaeon Archaeoglobus fulgidus

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.203 

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The crystal structure of a hyper-thermophilic carboxylesterase from the archaeon Archaeoglobus fulgidus.

De Simone, G.Menchise, V.Manco, G.Mandrich, L.Sorrentino, N.Lang, D.Rossi, M.Pedone, C.

(2001) J Mol Biol 314: 507-518

  • DOI: https://doi.org/10.1006/jmbi.2001.5152
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The crystal structure of AFEST, a novel hyper-thermophilic carboxylesterase from the archaeon Archaeoglobus fulgidus, complexed with a sulphonyl derivative, has been determined and refined to 2.2 A resolution. This enzyme, which has recently been classified as a member of the hormone- sensitive-lipase (H) group of the esterase/lipase superfamily, presents a canonical alpha/beta hydrolase core, shielded on the C-terminal side by a cap region composed of five alpha-helices. It contains the catalytic triad Ser160, His285 and Asp255, whereby the nucleophile is covalently modified and the oxyanion hole formed by Gly88, Gly89 and Ala161. A structural comparison of AFEST with its mesophilic and thermophilic homologues, Brefeldin A esterase from Bacillus subtilis (BFAE) and EST2 from Alicyclobacillus acidocaldarius, reveals an increase in the number of intramolecular ion pairs and secondary structure content, as well as a significant reduction in loop extensions and ratio of hydrophobic to charged surface area. The variety of structural differences suggests possible strategies for thermostabilization of lipases and esterases with potential industrial applications.

  • Organizational Affiliation

    Centro di Studio di Biocristallografia- CNR, University of Naples "Federico II", via Mezzocannone 6/8, Naples, 80134, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
311Archaeoglobus fulgidusMutation(s): 0 
Find proteins for O28558 (Archaeoglobus fulgidus (strain ATCC 49558 / DSM 4304 / JCM 9628 / NBRC 100126 / VC-16))
Explore O28558 
Go to UniProtKB:  O28558
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO28558
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.203 
  • Space Group: P 62
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 169.05α = 90
b = 169.05β = 90
c = 104.544γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-12-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description