2FJ0

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.204 

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Ligand Structure Quality Assessment 


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
  • Primary Citation of Related Structures:  
    2FJ0

  • 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 juvenile hormone esterase (JHE), which cleaves the JH ester bond to produce methanol and JH acid ...

    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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Carboxylic ester hydrolaseA551Manduca sextaMutation(s): 0 
EC: 3.1.1
UniProt
Find proteins for Q9GPG0 (Manduca sexta)
Explore Q9GPG0 
Go to UniProtKB:  Q9GPG0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9GPG0
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TFC
Query on TFC

Download Ideal Coordinates CCD File 
B [auth A]1,1,1-TRIFLUORO-3-(OCTYLTHIO)ACETONE
C11 H19 F3 O S
WMQHRXUKAYSPPK-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
TFC BindingDB:  2FJ0 IC50: 22 (nM) from 1 assay(s)
PDBBind:  2FJ0 IC50: 22 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.204 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.82α = 90
b = 96.82β = 90
c = 165.395γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
EPMRphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

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