1EBV

OVINE PGHS-1 COMPLEXED WITH SALICYL HYDROXAMIC ACID


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.225 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

O-acetylsalicylhydroxamic acid, a novel acetylating inhibitor of prostaglandin H2 synthase: structural and functional characterization of enzyme-inhibitor interactions.

Loll, P.J.Sharkey, C.T.O'Connor, S.J.Dooley, C.M.O'Brien, E.Devocelle, M.Nolan, K.B.Selinsky, B.S.Fitzgerald, D.J.

(2001) Mol Pharmacol 60: 1407-1413

  • DOI: 10.1124/mol.60.6.1407
  • Primary Citation of Related Structures:  
    1EBV

  • PubMed Abstract: 
  • Aspirin is unique among clinically used nonsteroidal antiinflammatory drugs in that it irreversibly inactivates prostaglandin (PG) H2 synthase (PGHS) via acetylation of an active-site serine residue. We report the synthesis and characterization of a novel acetylating agent, O-acetylsalicylhydroxamic acid (AcSHA), which inhibits PGE2 synthesis in vivo and blocks the cyclooxygenase activity of PGHS in vitro ...

    Aspirin is unique among clinically used nonsteroidal antiinflammatory drugs in that it irreversibly inactivates prostaglandin (PG) H2 synthase (PGHS) via acetylation of an active-site serine residue. We report the synthesis and characterization of a novel acetylating agent, O-acetylsalicylhydroxamic acid (AcSHA), which inhibits PGE2 synthesis in vivo and blocks the cyclooxygenase activity of PGHS in vitro. AcSHA requires the presence of the active-site residue Ser-529 to be active against human PGHS-1; the S529A mutant is resistant to inactivation by the inhibitor. Analysis of PGHS inactivation by AcSHA, coupled with the X-ray crystal structure of the complex of ovine PGHS-1 with AcSHA, confirms that the inhibitor elicits its effects via acetylation of Ser-529 in the cyclooxygenase active site. The crystal structure reveals an intact inhibitor molecule bound in the enzyme's cyclooxygenase active-site channel, hydrogen bonding with Arg-119 of the enzyme. The structure-activity profile of AcSHA can be rationalized in terms of the crystal structure of the enzyme-ligand complex. AcSHA may prove useful as a lead compound to facilitate the development of new acetylating inhibitors.


    Organizational Affiliation

    Department of Pharmacology, University of Pennsylvania School of Medicine, Philadelphia, PA, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROSTAGLANDIN H2 SYNTHASEA551Ovis ariesMutation(s): 1 
Gene Names: PTGS1COX1
EC: 1.14.99.1
UniProt
Find proteins for P05979 (Ovis aries)
Explore P05979 
Go to UniProtKB:  P05979
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseB2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
F [auth A]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
NAG
Query on NAG

Download Ideal Coordinates CCD File 
C [auth A], D [auth A]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
SCL
Query on SCL

Download Ideal Coordinates CCD File 
E [auth A]ACETIC ACID SALICYLOYL-AMINO-ESTER
C9 H9 N O4
PCFWLDHLJWUGSU-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
OAS
Query on OAS
AL-PEPTIDE LINKINGC5 H9 N O4SER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.225 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.87α = 90
b = 207.46β = 90
c = 221.98γ = 90
Software Package:
Software NamePurpose
MAR345data collection
SCALEPACKdata scaling
X-PLORmodel building
CNSrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-02-24
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary