2WJ2

3D-crystal structure of humanized-rat fatty acid amide hydrolase (FAAH) conjugated with 7-phenyl-1-(5-(pyridin-2-yl)oxazol-2-yl)heptan- 1-one, an alpha-ketooxazole


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Binding and Inactivation Mechanism of a Humanized Fatty Acid Amide Hydrolase by Alpha-Ketoheterocycle Inhibitors Revealed from Cocrystal Structures.

Mileni, M.Garfunkle, J.Demartino, J.K.Cravatt, B.F.Boger, D.L.Stevens, R.C.

(2009) J.Am.Chem.Soc. 131: 10497

  • DOI: 10.1021/ja902694n
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The cocrystal X-ray structures of two isomeric alpha-ketooxazole inhibitors (1 (OL-135) and 2) bound to fatty acid amide hydrolase (FAAH), a key enzymatic regulator of endocannabinoid signaling, are disclosed. The active site catalytic Ser241 is cova ...

    The cocrystal X-ray structures of two isomeric alpha-ketooxazole inhibitors (1 (OL-135) and 2) bound to fatty acid amide hydrolase (FAAH), a key enzymatic regulator of endocannabinoid signaling, are disclosed. The active site catalytic Ser241 is covalently bound to the inhibitors' electrophilic carbonyl groups, providing the first structures of FAAH bound to an inhibitor as a deprotonated hemiketal mimicking the enzymatic tetrahedral intermediate. The work also offers a detailed view of the oxyanion hole and an exceptional "in-action" depiction of the unusual Ser-Ser-Lys catalytic triad. These structures capture the first picture of inhibitors that span the active site into the cytosolic port providing new insights that help to explain FAAH's interaction with substrate leaving groups and their role in modulating inhibitor potency and selectivity. The role for the activating central heterocycle is clearly defined and distinguished from that observed in prior applications with serine proteases, reconciling the large electronic effect of attached substituents found unique to this class of inhibitors with FAAH. Additional striking active site flexibility is seen upon binding of the inhibitors, providing insights into the existence of a now well-defined membrane access channel with the disappearance of a spatially independent portion of the acyl chain-binding pocket. Finally, comparison of the structures of OL-135 (1) and its isomer 2 indicates that they bind identically to FAAH, albeit with reversed orientations of the central activating heterocycle, revealing that the terminal 2-pyridyl substituent and the acyl chain phenyl group provide key anchoring interactions and confirming the distinguishing role of the activating oxazole.


    Organizational Affiliation

    Departments of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FATTY ACID AMIDE HYDROLASE 1
A, B
573Rattus norvegicusMutation(s): 6 
Gene Names: Faah (Faah1)
EC: 3.5.1.99
Find proteins for P97612 (Rattus norvegicus)
Go to UniProtKB:  P97612
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
OL1
Query on OL1

Download SDF File 
Download CCD File 
A, B
7-phenyl-1-(5-pyridin-2-yl-1,3-oxazol-2-yl)heptane-1,1-diol
C21 H24 N2 O3
PUCSKUWLMPSADN-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
OL1Ki: 4.7 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.184 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 103.440α = 90.00
b = 103.440β = 90.00
c = 254.130γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
PHENIXrefinement
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-09-15
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance