1EVQ

THE CRYSTAL STRUCTURE OF THE THERMOPHILIC CARBOXYLESTERASE EST2 FROM ALICYCLOBACILLUS ACIDOCALDARIUS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

A snapshot of a transition state analogue of a novel thermophilic esterase belonging to the subfamily of mammalian hormone-sensitive lipase.

De Simone, G.Galdiero, S.Manco, G.Lang, D.Rossi, M.Pedone, C.

(2000) J.Mol.Biol. 303: 761-771

  • DOI: 10.1006/jmbi.2000.4195
  • Also Cited By: 1U4N

  • PubMed Abstract: 
  • EST2 is a novel thermophilic carboxylesterase, isolated and cloned from Alicyclobacillus (formerly Bacillus) acidocaldarius, which optimally hydrolyses esters with acyl chain lengths of six to eight carbon atoms at 70 degrees C. On the basis of the a ...

    EST2 is a novel thermophilic carboxylesterase, isolated and cloned from Alicyclobacillus (formerly Bacillus) acidocaldarius, which optimally hydrolyses esters with acyl chain lengths of six to eight carbon atoms at 70 degrees C. On the basis of the amino acid sequence homology, it has been classified as a member of the mammalian hormone-sensitive lipase (HSL) subfamily. The crystal structure of EST2, complexed with a sulphonyl derivative, has been determined at 2.6 A resolution by a multiple wavelength anomalous diffraction experiment on a seleno-methionine derivative. EST2 presents a canonical alpha/beta hydrolase core, shielded at the C-terminal side by a cap region built up of five helices. It contains the lipase-like catalytic triad, Ser155, His282 and Asp252, whereby the nucleophile is covalently modified. This allows an unambiguous view of the putative active site of EST2, detecting the oxyanion hole, in whose formation the amino acid sequence motif His81-Gly82-Gly83-Gly84 is involved, and the hydrophobic binding pocket for the acyl chain. The structural model here reported provides the first example of a transition state analogue of an esterase/lipase belonging to the HSL group, thus affording useful information for the design of medical inhibitors. Moreover, as the first X-ray structure of a thermophilic carboxylesterase, the comparison with its mesophilic homologue, the Brefeldin A esterase (BFAE) from Bacillus subtilis, allows the identification of putative determinants of thermal stability.


    Related Citations: 
    • Crystallization and Preliminary X-ray Diffraction Studies of the Carboxylesterase EST2 from Alicyclobacillus acidocaldarius
      De Simone, G.,Manco, G.,Galdiero, S.,Lombardi, A.,Rossi, M.,Pavone, V.
      (1999) Acta Crystallogr.,Sect.D 55: 1348
    • Crystal Structure of Brefeldin A Esterase, a Bacterial Homolog of the Mammalian Hormone-sensitive Lipase
      Wei, Y.,Contreras, J.A.,Sheffield, P.,Osterlund, T.,Derewenda, U.,Kneusel, R.E.,Matern, U.,Holm, C.,Derewenda, Z.S.
      (1999) Nat.Struct.Mol.Biol. 6: 340


    Organizational Affiliation

    Dipartimento di Chimica and Centro di Studio di Biocristallografia- CNR, University of Naples "Federico II", via Mezzocannone 8, Naples, 80134, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SERINE HYDROLASE
A
310Alicyclobacillus acidocaldariusN/A
Find proteins for Q7SIG1 (Alicyclobacillus acidocaldarius)
Go to UniProtKB:  Q7SIG1
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

Download SDF File 
Download CCD File 
A
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
HEPES
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
TRS
Query on TRS

Download SDF File 
Download CCD File 
A
2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
TRIS BUFFER
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.216 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 79.105α = 90.00
b = 79.105β = 90.00
c = 107.290γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
CNSrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-11-22
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-01-31
    Type: Advisory, Experimental preparation