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5a86

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Structure of pregnane X receptor in complex with a Sphingosine 1- Phosphate Receptor 1 Antagonist

Structural highlights

5a86 is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.25Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

NR1I2_HUMAN Nuclear receptor that binds and is activated by variety of endogenous and xenobiotic compounds. Transcription factor that activates the transcription of multiple genes involved in the metabolism and secretion of potentially harmful xenobiotics, drugs and endogenous compounds. Activated by the antibiotic rifampicin and various plant metabolites, such as hyperforin, guggulipid, colupulone, and isoflavones. Response to specific ligands is species-specific. Activated by naturally occurring steroids, such as pregnenolone and progesterone. Binds to a response element in the promoters of the CYP3A4 and ABCB1/MDR1 genes.^[1] ^[2] ^[3] ^[4] ^[5] ^[6]

Publication Abstract from PubMed

We report here a novel series of benzimidazole sulfonamides that act as antagonists of the S1P1 receptor, identified by exploiting an understanding of the pharmacophore of a high throughput screening (HTS)-derived series of compounds described previously. Lead compound 2 potently inhibits S1P-induced receptor internalization in a cell-based assay (EC50 = 0.05 muM), but has poor physical properties and metabolic stability. Evolution of this compound through structure-activity relationship development and property optimization led to in vivo probes such as 4. However, this compound was unexpectedly found to be a potent CYP3A inducer in human hepatocytes, and thus further chemistry efforts were directed at addressing this liability. By employing a pregnane X receptor (PXR) reporter gene assay to prioritize compounds for further testing in human hepatocytes, we identified lipophilicity as a key molecular property influencing the likelihood of P450 induction. Ultimately, we have identified compounds such as 46 and 47, which demonstrate the desired S1P1 antagonist activity while having greatly reduced risk of CYP3A induction in humans. These compounds have excellent oral bioavailability in preclinical species and exhibit pharmacodynamic effects of S1P1 antagonism in several in vivo models following oral dosing. Relatively modest antitumor activity was observed in multiple xenograft models, however, suggesting that selective S1P1 antagonists would have limited utility as anticancer therapeutics as single agents.

Identification and Optimization of Benzimidazole Sulfonamides as Orally Bioavailable Sphingosine 1-Phosphate Receptor 1 Antagonists with in Vivo Activity.,Hennessy EJ, Oza V, Adam A, Byth K, Castriotta L, Grewal G, Hamilton GA, Kamhi VM, Lewis P, Li D, Lyne P, Oster L, Rooney MT, Saeh JC, Sha L, Su Q, Wen S, Xue Y, Yang B J Med Chem. 2015 Sep 10;58(17):7057-75. doi: 10.1021/acs.jmedchem.5b01078. Epub, 2015 Aug 26. PMID:26291341^[7]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Lehmann JM, McKee DD, Watson MA, Willson TM, Moore JT, Kliewer SA. The human orphan nuclear receptor PXR is activated by compounds that regulate CYP3A4 gene expression and cause drug interactions. J Clin Invest. 1998 Sep 1;102(5):1016-23. PMID:9727070 doi:10.1172/JCI3703
↑ Zhang J, Kuehl P, Green ED, Touchman JW, Watkins PB, Daly A, Hall SD, Maurel P, Relling M, Brimer C, Yasuda K, Wrighton SA, Hancock M, Kim RB, Strom S, Thummel K, Russell CG, Hudson JR Jr, Schuetz EG, Boguski MS. The human pregnane X receptor: genomic structure and identification and functional characterization of natural allelic variants. Pharmacogenetics. 2001 Oct;11(7):555-72. PMID:11668216
↑ Geick A, Eichelbaum M, Burk O. Nuclear receptor response elements mediate induction of intestinal MDR1 by rifampin. J Biol Chem. 2001 May 4;276(18):14581-7. Epub 2001 Jan 31. PMID:11297522 doi:10.1074/jbc.M010173200
↑ Li Y, Ross-Viola JS, Shay NF, Moore DD, Ricketts ML. Human CYP3A4 and murine Cyp3A11 are regulated by equol and genistein via the pregnane X receptor in a species-specific manner. J Nutr. 2009 May;139(5):898-904. doi: 10.3945/jn.108.103572. Epub 2009 Mar 18. PMID:19297428 doi:10.3945/jn.108.103572
↑ Watkins RE, Maglich JM, Moore LB, Wisely GB, Noble SM, Davis-Searles PR, Lambert MH, Kliewer SA, Redinbo MR. 2.1 A crystal structure of human PXR in complex with the St. John's wort compound hyperforin. Biochemistry. 2003 Feb 18;42(6):1430-8. PMID:12578355 doi:10.1021/bi0268753
↑ Teotico DG, Bischof JJ, Peng L, Kliewer SA, Redinbo MR. Structural basis of human pregnane X receptor activation by the hops constituent colupulone. Mol Pharmacol. 2008 Dec;74(6):1512-20. doi: 10.1124/mol.108.050732. Epub 2008 Sep, 2. PMID:18768384 doi:10.1124/mol.108.050732
↑ Hennessy EJ, Oza V, Adam A, Byth K, Castriotta L, Grewal G, Hamilton GA, Kamhi VM, Lewis P, Li D, Lyne P, Oster L, Rooney MT, Saeh JC, Sha L, Su Q, Wen S, Xue Y, Yang B. Identification and Optimization of Benzimidazole Sulfonamides as Orally Bioavailable Sphingosine 1-Phosphate Receptor 1 Antagonists with in Vivo Activity. J Med Chem. 2015 Sep 10;58(17):7057-75. doi: 10.1021/acs.jmedchem.5b01078. Epub, 2015 Aug 26. PMID:26291341 doi:http://dx.doi.org/10.1021/acs.jmedchem.5b01078

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5a86"

Categories: Homo sapiens | Large Structures | Oster L | Xue Y

@@ Line 4: / Line 4: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[5a86]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5A86 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5A86 FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=D7E:4-CHLORO-N-[(1R)-1-[1-ETHYL-6-(TRIFLUOROMETHYL)BENZIMIDAZOL-2-YL]ETHYL]BENZENESULFONAMIDE'>D7E</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.25&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=D7E:4-CHLORO-N-[(1R)-1-[1-ETHYL-6-(TRIFLUOROMETHYL)BENZIMIDAZOL-2-YL]ETHYL]BENZENESULFONAMIDE'>D7E</scene></td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5a86 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5a86 OCA], [https://pdbe.org/5a86 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5a86 RCSB], [https://www.ebi.ac.uk/pdbsum/5a86 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5a86 ProSAT]</span></td></tr>
 </table>
@@ Line 20: / Line 21: @@
 ==See Also==
-*[[Pregnane X receptor|Pregnane X receptor]]
+*[[Pregnane X receptor 3D structures|Pregnane X receptor 3D structures]]
 == References ==
 <references/>

5a86

From Proteopedia

Current revision

Structure of pregnane X receptor in complex with a Sphingosine 1- Phosphate Receptor 1 Antagonist

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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