1QZ3

CRYSTAL STRUCTURE OF MUTANT M211S/R215L OF CARBOXYLESTERASE EST2 COMPLEXED WITH HEXADECANESULFONATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

A substrate-induced switch in the reaction mechanism of a thermophilic esterase: kinetic evidences and structural basis.

De Simone, G.Mandrich, L.Menchise, V.Giordano, V.Febbraio, F.Rossi, M.Pedone, C.Manco, G.

(2004) J.Biol.Chem. 279: 6815-6823

  • DOI: 10.1074/jbc.M307738200
  • Also Cited By: 1U4N

  • PubMed Abstract: 
  • The reaction mechanism of the esterase 2 (EST2) from Alicyclobacillus acidocaldarius was studied at the kinetic and structural level to shed light on the mechanism of activity and substrate specificity increase previously observed in its double mutan ...

    The reaction mechanism of the esterase 2 (EST2) from Alicyclobacillus acidocaldarius was studied at the kinetic and structural level to shed light on the mechanism of activity and substrate specificity increase previously observed in its double mutant M211S/R215L. In particular, the values of kinetic constants (k1, k(-1), k2, and k3) along with activation energies (E1, E(-1), E2, and E3) were measured for wild type and mutant enzyme. The previously suggested substrate-induced switch in the reaction mechanism from kcat=k3 with a short acyl chain substrate (p-nitrophenyl hexanoate) to kcat=k2 with a long acyl chain substrate (p-nitrophenyl dodecanoate) was validated. The inhibition afforded by an irreversible inhibitor (1-hexadecanesulfonyl chloride), structurally related to p-nitrophenyl dodecanoate, was studied by kinetic analysis. Moreover the three-dimensional structure of the double mutant bound to this inhibitor was determined, providing essential information on the enzyme mechanism. In fact, structural analysis explained the observed substrate-induced switch because of an inversion in the binding mode of the long acyl chain derivatives with respect to the acyl- and alcohol-binding sites.


    Related Citations: 
    • A SNAPSHOT OF THE 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


    Organizational Affiliation

    Istituto di Biostrutture e Bioimmagini-Consiglio Nazionale delle Ricerche, via Mezzocannone 6, 80134 Naples, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CARBOXYLESTERASE EST2
A
310Alicyclobacillus acidocaldariusMutation(s): 2 
Find proteins for Q7SIG1 (Alicyclobacillus acidocaldarius)
Go to UniProtKB:  Q7SIG1
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HDS
Query on HDS

Download SDF File 
Download CCD File 
A
1-HEXADECANOSULFONIC ACID
C16 H34 O3 S
SSILHZFTFWOUJR-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.174 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 85.193α = 90.00
b = 85.193β = 90.00
c = 103.585γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
MAR345data collection
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-03-23
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Advisory, Refinement description
  • Version 1.4: 2019-02-06
    Type: Advisory, Data collection, Database references, Source and taxonomy, Structure summary