4S0T

STRUCTURE OF HUMAN PREGNANE X RECEPTOR LIGAND BINDING DOMAIN BOUND WITH ADNECTIN-1 AND COMPOUND-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.14 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Developing Adnectins That Target SRC Co-Activator Binding to PXR: A Structural Approach toward Understanding Promiscuity of PXR.

Khan, J.A.Camac, D.M.Low, S.Tebben, A.J.Wensel, D.L.Wright, M.C.Su, J.Jenny, V.Gupta, R.D.Ruzanov, M.Russo, K.A.Bell, A.An, Y.Bryson, J.W.Gao, M.Gambhire, P.Baldwin, E.T.Gardner, D.Cavallaro, C.L.Duncia, J.V.Hynes, J.

(2015) J.Mol.Biol. 427: 924-942

  • DOI: 10.1016/j.jmb.2014.12.022
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The human pregnane X receptor (PXR) is a promiscuous nuclear receptor that functions as a sensor to a wide variety of xenobiotics and regulates expression of several drug metabolizing enzymes and transporters. We have generated "Adnectins", derived f ...

    The human pregnane X receptor (PXR) is a promiscuous nuclear receptor that functions as a sensor to a wide variety of xenobiotics and regulates expression of several drug metabolizing enzymes and transporters. We have generated "Adnectins", derived from 10th fibronectin type III domain ((10)Fn3), that target the PXR ligand binding domain (LBD) interactions with the steroid receptor co-activator-1 (SRC-1) peptide, displacing SRC-1 binding. Adnectins are structurally homologous to the immunoglobulin superfamily. Three different co-crystal structures of PXR LBD with Adnectin-1 and CCR1 (CC chemokine receptor-1) antagonist Compound-1 were determined. This structural information was used to modulate PXR affinity for a related CCR1 antagonist compound that entered into clinical trials for rheumatoid arthritis. The structures of PXR with Adnectin-1 reveal specificity of Adnectin-1 in not only targeting the interface of the SRC-1 interactions but also engaging the same set of residues that are involved in binding of SRC-1 to PXR. Substituting SRC-1 with Adnectin-1 does not alter the binding conformation of Compound-1 in the ligand binding pocket. The structure also reveals the possibility of using Adnectins as crystallization chaperones to generate structures of PXR with compounds of interest.


    Organizational Affiliation

    Bristol-Myers Squibb Research and Development, PO Box 4000, Princeton, NJ 08543-4000, USA.,Adnexus, 100 Beaver Street, Waltham, MA 02453, USA.,Bristol-Myers Squibb Research and Development, PO Box 4000, Princeton, NJ 08543-4000, USA. Electronic address: javed.khan@bms.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor subfamily 1 group I member 2
A, B
315Homo sapiensMutation(s): 0 
Gene Names: NR1I2 (PXR)
Find proteins for O75469 (Homo sapiens)
Go to Gene View: NR1I2
Go to UniProtKB:  O75469
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Adnectin-1
D, E
120N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
40U
Query on 40U

Download SDF File 
Download CCD File 
A, B
N-{(2R)-1-[(4S)-4-(4-chlorophenyl)-4-hydroxy-3,3-dimethylpiperidin-1-yl]-3-methyl-1-oxobutan-2-yl}-2-cyclopropylacetamide
C23 H33 Cl N2 O3
CZEQXLMAKRKHJC-OFNKIYASSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.14 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.214 
  • Space Group: P 4
Unit Cell:
Length (Å)Angle (°)
a = 119.871α = 90.00
b = 119.871β = 90.00
c = 84.186γ = 90.00
Software Package:
Software NamePurpose
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-02-04
    Type: Initial release
  • Version 1.1: 2015-02-25
    Type: Database references
  • Version 1.2: 2017-11-29
    Type: Database references