ISDA

Entry Detail

PDB ID:

6XP9

Keywords:

Title:

STRUCTURE OF HUMAN PREGNANE X RECEPTOR LIGAND BINDING DOMAIN BOUND TETHERED WITH SRC co-activator peptide IN COMPLEX WITH (S,S)-1

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Escherichia coli BL21(DE3)

PDB Version:

Deposition Date:

2020-07-08

Release Date:

2020-09-23

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.27 Å

R-Value Free:

0.21

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Nuclear receptor subfamily 1 group I member 2,Nuclear receptor coactivator 1 fusion
Chain IDs:A, B
Chain Length:351
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:O75469 Pfam ID:PF00104

Ligand Molecules

GOL

QCG

Primary Citation

Structure-based amelioration of PXR transactivation in a novel series of macrocyclic allosteric inhibitors of HIV-1 integrase.

Sivaprakasam, P, Wang, Z, Meanwell, N.A, Khan, J.A, Langley, D.R, Johnson, S.R, Li, G, Pendri, A, Connolly, T.P, Gao, M, Camac, D.M, Klakouski, C, Zvyaga, T, Cianci, C, McAuliffe, B, Ding, B, Discotto, L, Krystal, M.R, Jenkins, S, Peese, K.M, Narasimhulu Naidu, B.Show

Bioorg.Med.Chem.Lett. 30 127531 127531 (2020)

PMID: 32890685 DOI: 10.1016/j.bmcl.2020.127531

Abstact

Previous studies have identified a series of imidazo[1,2-a]pyridine (IZP) derivatives as potent allosteric inhibitors of HIV-1 integrase (ALLINIs) and virus infection in cell culture. However, IZPs were also found to be relatively potent activators of the pregnane-X receptor (PXR), raising the specter of induction of CYP-mediated drug disposition pathways. In an attempt to modify PXR activity without affecting anti-HIV-1 activity, rational structure-based design and modeling approaches were used. An X-ray cocrystal structure of (S,S)-1 in the PXR ligand binding domain (LBD) allowed an examination of the potential of rational structural modifications designed to abrogate PXR. The introduction of bulky basic amines at the C-8 position provided macrocyclic IZP derivatives that displayed potent HIV-1 inhibitory activity in cell culture with no detectable PXR transactivation at the highest concentration tested.

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Primary Citation of related structures