2CGO

FACTOR INHIBITING HIF-1 ALPHA with fumarate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural and Mechanistic Studies on the Inhibition of the Hypoxia-Inducible Transcription Factor Hydroxylases by Tricarboxylic Acid Cycle Intermediates.

Hewitson, K.Lienard, B.McDonough, M.A.Clifton, I.J.Butler, D.Soares, A.S.Oldham, N.J.McNeill, L.A.Schofield, C.J.

(2007) J.Biol.Chem. 282: 3293-3301

  • DOI: 10.1074/jbc.M608337200
  • Primary Citation of Related Structures:  2CGN

  • PubMed Abstract: 
  • In humans both the levels and activity of the alpha-subunit of the hypoxia-inducible transcription factor (HIF-alpha) are regulated by its post-translation hydroxylation as catalyzed by iron- and 2-oxoglutarate (2OG)-dependent prolyl and asparaginyl ...

    In humans both the levels and activity of the alpha-subunit of the hypoxia-inducible transcription factor (HIF-alpha) are regulated by its post-translation hydroxylation as catalyzed by iron- and 2-oxoglutarate (2OG)-dependent prolyl and asparaginyl hydroxylases (PHD1-3 and factor-inhibiting HIF (FIH), respectively). One consequence of hypoxia is the accumulation of tricarboxylic acid cycle intermediates (TCAIs). In vitro assays were used to assess non-2OG TCAIs as inhibitors of purified PHD2 and FIH. Under the assay conditions, no significant FIH inhibition was observed by the TCAIs or pyruvate, but fumarate, succinate, and isocitrate inhibited PHD2. Mass spectrometric analyses under nondenaturing conditions were used to investigate the binding of TCAIs to PHD2 and supported the solution studies. X-ray crystal structures of FIH in complex with Fe(II) and fumarate or succinate revealed similar binding modes for each in the 2OG co-substrate binding site. The in vitro results suggest that the cellular inhibition of PHD2, but probably not FIH, by fumarate and succinate may play a role in the Warburg effect providing that appropriate relative concentrations of the components are achieved under physiological conditions.


    Organizational Affiliation

    Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom. kirsty.hewitson@reox.co.uk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HYPOXIA-INDUCIBLE FACTOR 1 ALPHA INHIBITOR
A
349Homo sapiensGene Names: HIF1AN (FIH1)
EC: 1.14.11.n4, 1.14.11.30
Find proteins for Q9NWT6 (Homo sapiens)
Go to Gene View: HIF1AN
Go to UniProtKB:  Q9NWT6
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
FE
Query on FE

Download SDF File 
Download CCD File 
A
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
FUM
Query on FUM

Download SDF File 
Download CCD File 
A
FUMARIC ACID
C4 H4 O4
VZCYOOQTPOCHFL-OWOJBTEDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.187 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 86.660α = 90.00
b = 86.660β = 90.00
c = 147.349γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
CNSphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-12-13
    Type: Initial release
  • Version 1.1: 2012-07-18
    Type: Atomic model, Derived calculations, Non-polymer description, Other, Version format compliance
  • Version 1.2: 2018-02-21
    Type: Database references, Structure summary