5KXA

Selective Inhibition of Autotaxin is Effective in Mouse Models of Liver Fibrosis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Selective Inhibition of Autotaxin Is Efficacious in Mouse Models of Liver Fibrosis.

Bain, G.Shannon, K.E.Huang, F.Darlington, J.Goulet, L.Prodanovich, P.Ma, G.L.Santini, A.M.Stein, A.J.Lonergan, D.King, C.D.Calderon, I.Lai, A.Hutchinson, J.H.Evans, J.F.

(2017) J. Pharmacol. Exp. Ther. 360: 1-13

  • DOI: 10.1124/jpet.116.237156

  • PubMed Abstract: 
  • Autotaxin (ATX) is a secreted glycoprotein that converts lysophosphatidylcholine (LPC) to the bioactive phospholipid lysophosphatidic acid (LPA) and is the major enzyme generating circulating LPA. Inhibition of LPA signaling has profound antifibrotic ...

    Autotaxin (ATX) is a secreted glycoprotein that converts lysophosphatidylcholine (LPC) to the bioactive phospholipid lysophosphatidic acid (LPA) and is the major enzyme generating circulating LPA. Inhibition of LPA signaling has profound antifibrotic effects in multiple organ systems, including lung, kidney, skin, and peritoneum. However, other LPA-generating pathways exist, and the role of ATX in localized tissue LPA production and fibrosis remains unclear and controversial. In this study, we describe the preclinical pharmacologic, pharmacokinetic, and pharmacodynamic properties of a novel small-molecule ATX inhibitor, PAT-505 [3-((6-chloro-2-cyclopropyl-1-(1-ethyl-1H-pyrazol-4-yl)-7-fluoro-1H-indol-3-yl) thio)-2-fluorobenzoic acid sodium salt]. PAT-505 is a potent, selective, noncompetitive inhibitor that displays significant inhibition of ATX activity in plasma and liver tissue after oral administration. When dosed therapeutically in a Stelic Mouse Animal Model of nonalcoholic steatohepatitis (NASH), PAT-505 treatment resulted in a small but significant improvement in fibrosis with only minor improvements in hepatocellular ballooning and hepatic inflammation. In a choline-deficient, high-fat diet model of NASH, therapeutic treatment with PAT-505 robustly reduced liver fibrosis with no significant effect on steatosis, hepatocellular ballooning, or inflammation. These data demonstrate that inhibiting autotaxin is antifibrotic and may represent a novel therapeutic approach for the treatment of multiple fibrotic liver diseases, including NASH.


    Organizational Affiliation

    PharmAkea Inc, San Diego, California (G.B., K.E.S., F.H., J.D., L.G., P.P., G.L.M., A.M.S., D.L., C.D.K., I.C., A.L., J.H.H., J.E.F.); Cayman Chemical Company, Ann Arbor, Michigan (A.J.S.) gbain@pharmakea.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ectonucleotide pyrophosphatase/phosphodiesterase family member 2
A
863Homo sapiensMutation(s): 2 
Gene Names: ENPP2 (ATX, PDNP2)
EC: 3.1.4.39
Find proteins for Q13822 (Homo sapiens)
Go to Gene View: ENPP2
Go to UniProtKB:  Q13822
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

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Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
ZN
Query on ZN

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Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

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A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
6Y7
Query on 6Y7

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Download CCD File 
A
3-[6-chloranyl-2-cyclopropyl-1-(1-ethylpyrazol-4-yl)-7-fluoranyl-indol-3-yl]sulfanyl-2-fluoranyl-benzoic acid
C23 H18 Cl F2 N3 O2 S
BQMMCRXYIIKAOB-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.173 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 55.100α = 71.56
b = 55.506β = 79.75
c = 70.075γ = 81.09
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data scaling
PHASERphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-11-09
    Type: Initial release
  • Version 1.1: 2016-12-21
    Type: Database references