ISDA

Deposition Date 2016-08-24

Release Date 2017-03-01

Last Version Date 2024-03-06

Entry Detail

PDB ID:

5T36

Keywords:

MEMBRANE PROTEIN

Title:

Crystal structure of mPGES-1 bound to inhibitor

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Spodoptera frugiperda

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.40 Å

R-Value Free:

0.19

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

H 3

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Prostaglandin E synthase
Gene (Uniprot):PTGES
Chain IDs:A
Chain Length:154
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:O14684 Pfam ID:PF01124 EC:5.3.99.3

Ligand Molecules

755

BOG

GSH

PG4

Primary Citation

Discovery and characterization of [(cyclopentyl)ethyl]benzoic acid inhibitors of microsomal prostaglandin E synthase-1.

Partridge, K.M, Antonysamy, S, Bhattachar, S.N, Chandrasekhar, S, Fisher, M.J, Fretland, A, Gooding, K, Harvey, A, Hughes, N.E, Kuklish, S.L, Luz, J.G, Manninen, P.R, McGee, J.E, Mudra, D.R, Navarro, A, Norman, B.H, Quimby, S.J, Schiffler, M.A, Sloan, A.V, Warshawsky, A.M, Weller, J.M, York, J.S, Yu, X.P.Show

Bioorg. Med. Chem. Lett. 27 1478 1483 (2017)

PMID: 28190634 DOI: 10.1016/j.bmcl.2016.11.011

Abstact

We describe a novel class of acidic mPGES-1 inhibitors with nanomolar enzymatic and human whole blood (HWB) potency. Rational design in conjunction with structure-based design led initially to the identification of anthranilic acid 5, an mPGES-1 inhibitor with micromolar HWB potency. Structural modifications of 5 improved HWB potency by over 1000×, reduced CYP2C9 single point inhibition, and improved rat clearance, which led to the selection of [(cyclopentyl)ethyl]benzoic acid compound 16 for clinical studies. Compound 16 showed an IC80 of 24nM for inhibition of PGE2 formation in vitro in LPS-stimulated HWB. A single oral dose resulted in plasma concentrations of 16 that exceeded its HWB IC80 in both rat (5mg/kg) and dog (3mg/kg) for over twelve hours.

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Primary Citation of related structures