2FJ0

Crystal Structure of Juvenile Hormone Esterase from Manduca sexta, with OTFP covalently attached


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural studies of a potent insect maturation inhibitor bound to the juvenile hormone esterase of Manduca sexta.

Wogulis, M.Wheelock, C.E.Kamita, S.G.Hinton, A.C.Whetstone, P.A.Hammock, B.D.Wilson, D.K.

(2006) Biochemistry 45: 4045-4057

  • DOI: 10.1021/bi0521644

  • PubMed Abstract: 
  • Juvenile hormone (JH) is an insect hormone containing an alpha,beta-unsaturated ester consisting of a small alcohol and long, hydrophobic acid. JH degradation is required for proper insect development. One pathway of this degradation is through juven ...

    Juvenile hormone (JH) is an insect hormone containing an alpha,beta-unsaturated ester consisting of a small alcohol and long, hydrophobic acid. JH degradation is required for proper insect development. One pathway of this degradation is through juvenile hormone esterase (JHE), which cleaves the JH ester bond to produce methanol and JH acid. JHE is a member of the functionally divergent alpha/beta-hydrolase family of enzymes and is a highly efficient enzyme that cleaves JH at very low in vivo concentrations. We present here a 2.7 A crystal structure of JHE from the tobacco hornworm Manduca sexta (MsJHE) in complex with the transition state analogue inhibitor 3-octylthio-1,1,1-trifluoropropan-2-one (OTFP) covalently bound to the active site. This crystal structure, the first JHE structure reported, contains a long, hydrophobic binding pocket with the solvent-inaccessible catalytic triad located at the end. The structure explains many of the interactions observed between JHE and its substrates and inhibitors, such as the preference for small alcohol groups and long hydrophobic backbones. The most potent JHE inhibitors identified to date contain a trifluoromethyl ketone (TFK) moiety and have a sulfur atom beta to the ketone. In this study, sulfur-aromatic interactions were observed between the sulfur atom of OTFP and a conserved aromatic residue in the crystal structure. Mutational analysis supported the hypothesis that these interactions contribute to the potency of sulfur-containing TFK inhibitors. Together, these results clarify the binding mechanism of JHE inhibitors and provide useful observations for the development of additional enzyme inhibitors for a variety of enzymes.


    Organizational Affiliation

    Department of Molecular and Cellular Biology, University of California, Davis, California 95616, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carboxylic ester hydrolase
A
551Manduca sextaMutation(s): 0 
EC: 3.1.1.-
Find proteins for Q9GPG0 (Manduca sexta)
Go to UniProtKB:  Q9GPG0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TFC
Query on TFC

Download SDF File 
Download CCD File 
A
1,1,1-TRIFLUORO-3-(OCTYLTHIO)ACETONE
C11 H19 F3 O S
WMQHRXUKAYSPPK-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TFCIC50: 22 nM (100) BINDINGDB
TFCIC50: 22 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.204 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 96.820α = 90.00
b = 96.820β = 90.00
c = 165.395γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
EPMRphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-05-23
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2015-06-10
    Type: Database references, Source and taxonomy