1RY8

Prostaglandin F synthase complexed with NADPH and rutin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.69 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Crystal structure of human prostaglandin F synthase (AKR1C3).

Komoto, J.Yamada, T.Watanabe, K.Takusagawa, F.

(2004) Biochemistry 43: 2188-2198

  • DOI: 10.1021/bi036046x
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Prostaglandin H(2) (PGH(2)) formed from arachidonic acid is an unstable intermediate and is efficiently converted into more stable arachidonate metabolites (PGD(2), PGE(2), and PGF(2)) by the action of three groups of enzymes. Prostaglandin F synthas ...

    Prostaglandin H(2) (PGH(2)) formed from arachidonic acid is an unstable intermediate and is efficiently converted into more stable arachidonate metabolites (PGD(2), PGE(2), and PGF(2)) by the action of three groups of enzymes. Prostaglandin F synthase (PGFS) was first purified from bovine lung and catalyzes the formation of 9 alpha,11 beta-PGF(2) from PGD(2) and PGF(2)(alpha) from PGH(2) in the presence of NADPH. Human PGFS is 3 alpha-hydroxysteroid dehydrogenase (3 alpha-HSD) type II and has PGFS activity and 3 alpha-HSD activity. Human lung PGFS has been crystallized with the cofactor NADP(+) and the substrate PGD(2), and with the cofactor NADPH and the inhibitor rutin. These complex structures have been determined at 1.69 A resolution. PGFS has an (alpha/beta)(8) barrel structure. The cofactor and substrate or inhibitor bind in a cavity at the C-terminal end of the barrel. The cofactor binds deeply in the cavity and has extensive interactions with PGFS through hydrogen bonds, whereas the substrate (PGD(2)) is located above the bound cofactor and has little interaction with PGFS. Despite being largely structurally different from PGD(2), rutin is located at the same site of PGD(2), and its catechol and rhamnose moieties are involved in hydrogen bonds with PGFS. The catalytic site of PGFS contains the conserved Y55 and H117 residues. The carbonyl O(11) of PGD(2) and the hydroxyl O(13) of rutin are involved in hydrogen bonds with Y55 and H117. The cyclopentane ring of PGD(2) and the phenyl ring of rutin face the re-side of the nicotinamide ring of the cofactor. On the basis of the catalytic geometry, a direct hydride transfer from NADPH to PGD(2) would be a reasonable catalytic mechanism. The hydride transfer is facilitated by protonation of carbonyl O(11) of PGD(2) from either H117 (at low pH) or Y55 (at high pH). Since the substrate binding cavity of PGFS is relatively large in comparison with those of AKR1C1 and AKR1C2, PGFS (AKR1C3) could catalyze the reduction and/or oxidation reactions of various compounds over a relatively wide pH range.


    Organizational Affiliation

    Department of Molecular Biosciences, University of Kansas, 1200 Sunnyside Avenue, Lawrence, Kansas 66045-7534, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aldo-keto reductase family 1 member C3
A, B
323Homo sapiensMutation(s): 0 
Gene Names: AKR1C3DDH1PGFSKIAA0119HSD17B5
EC: 1.1.1 (PDB Primary Data), 1.3.1.20 (PDB Primary Data), 1.1.1.188 (PDB Primary Data), 1 (UniProt), 1.1.1.357 (UniProt), 1.1.1.112 (UniProt), 1.1.1.239 (UniProt), 1.1.1.64 (UniProt)
Find proteins for P42330 (Homo sapiens)
Go to UniProtKB:  P42330
NIH Common Fund Data Resources
PHAROS  P42330
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NDP
Query on NDP

Download CCD File 
A, B
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
 Ligand Interaction
RUT
Query on RUT

Download CCD File 
A, B
RUTIN
C27 H30 O16
IKGXIBQEEMLURG-NVPNHPEKSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.69 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.06α = 73.9
b = 49.37β = 86.3
c = 83.59γ = 69.9
Software Package:
Software NamePurpose
APSdata collection
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-11-02
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description