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NR1I2 / PXR

nuclear receptor subfamily 1, group I, member 2

Pregnane X receptor (PXR), a NR1 Thyroid Hormone-Like Receptor, has been shown to mediate the effects of steroid hormones, including progesterone, glucocorticoid, and pregnenolone, and effects of xenobiotics, through the cytochrome P-450 3A gene family (CYP3A). PXR protects the body from hepatotoxicity of secondary bile acids such as lithocholic acid (LCA) by inducing expression of the hydroxylating cytochrome P450 enzyme CYP3A and promoting detoxification. PXR also has been suggested to regulate drug efflux by activating expression of the MDR1 gene, control the biosynthesis and metabolism of bile acids, and influence the protection of the feto-maternal system from the toxic effects of endogenous steroids and foreign substrates. PXR binds as a heterodimer (with RXR) to the CYP3A promoter region. At least six protein isoforms, produced by alternative splicing, have been reported.

Gene Name: nuclear receptor subfamily 1, group I, member 2
Family/Subfamily: NHR , NR1 Thyroid hormone-like
Synonyms: NR1I2, BXR, Orphan nuclear receptor PXR, Orphan nuclear receptor PAR1, PARq, PRR, PXR, Pregnane X receptor, ONR1, SAR, SXR
Target Sequences: NM_003889 NP_003880.3 O75469

Publications (5)

1
Human pregnane X receptor and resistance to chemotherapy in prostate cancer. Chen Y, Tang Y, Wang MT, Zeng S, Nie D. Cancer research. 2007 67:10361-7. [PubMed:17974979]
2
The phytoestrogen coumestrol is a naturally occurring antagonist of the human pregnane X receptor. Wang H, Li H, Moore LB, Johnson MD, Maglich JM, Goodwin B, Ittoop OR, Wisely B, Creech K, Parks DJ, Collins JL, Willson TM, Kalpana GV, Venkatesh M, Xie W, Cho SY, Roboz J, Redinbo M, Moore JT, Mani S. Molecular endocrinology (Baltimore, Md.). 2008 22:838-57. [PubMed:18096694]
3
Expanding the roles for pregnane X receptor in cancer: proliferation and drug resistance in ovarian cancer. Gupta D, Venkatesh M, Wang H, Kim S, Sinz M, Goldberg GL, Whitney K, Longley C, Mani S. Clinical cancer research : an official journal of the American Association for Cancer Research. 2008 14:5332-40. [PubMed:18765524]
4
Restoring blood-brain barrier P-glycoprotein reduces brain amyloid-beta in a mouse model of Alzheimer's disease. Hartz AM, Miller DS, Bauer B. Molecular pharmacology. 2010 77:715-23. [PubMed:20101004] [PMC:PMC2872973]
5
Prenatal glucocorticoid administration enhances bilirubin metabolic capacity and increases Ugt1a and Abcc2 gene expression via glucocorticoid receptor and PXR in rat fetal liver. Tsukasa Kobayashi, Yuko Takeba, Yuki Ohta, Masanori Ootaki, Keisuke Kida, Minoru Watanabe, Taroh Iiri, Naoki Matsumoto. The journal of obstetrics and gynaecology research. 2022 July;48:1591-1606. [Full Text Article] [PubMed:35445507]
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Proteins (8)
Over-Expression Lysate (2)
Recombinant (6)
NR1I2 / PXR (8)
No (8)
10His-SUMO, N-terminus + Myc, C-terminus (1)
GST (1)
GST, N-terminus (1)
His-GST (2)
Myc-DDK (Flag) (3)
Human (5)
Mouse (1)
Rat (1)
293T Cells (1)
E. coli (3)
HEK 293 Cells (2)
Wheat Germ Extract (2)
Purified (2)
NR1I2 / PXR Protein - 12.5% SDS-PAGE of human NR1I2 stained with Coomassie Blue
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Wheat Germ Extract
GST
76.2 kDa
2 µg/$439
NR1I2 / PXR Protein - 12.5% SDS-PAGE Stained with Coomassie Blue.
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Wheat Germ Extract
GST, N-terminus
10 µg/$479; 25 µg/$670
NR1I2 / PXR Protein - Purified recombinant protein NR1I2 was analyzed by SDS-PAGE gel and Coomassie Blue Staining
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HEK 293 Cells
Myc-DDK (Flag)
49.6 kDa
20 µg/$1,107
NR1I2 / PXR Protein - (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
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E. coli
10His-SUMO, N-terminus + Myc, C-terminus
1 mg/$1,355; 100 µg/$420; 20 µg/$323
NR1I2 / PXR Protein - Western validation with an anti-DDK antibody * L: Control HEK293 lysate R: Over-expression lysate
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293T Cells
Myc-DDK (Flag)
49.6 kDa
20 µg/$150
NR1I2 / PXR Protein - Western validation with an anti-DDK antibody * L: Control HEK293 lysate R: Over-expression lysate
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HEK 293 Cells
Myc-DDK (Flag)
49.6 kDa
100 µg/$494
NR1I2 / PXR Protein - Recombinant Pregnane X Receptor By SDS-PAGE
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E. coli
His-GST
48.7 kDa
10 µg/$287; 50 µg/$482; 100 µg/$770; 200 µg/$962; 1 mg/$2,094; 500 µg/$1,623; 5 mg/$3,361; 2 mg/$2,284
NR1I2 / PXR Protein - Recombinant Pregnane X Receptor By SDS-PAGE
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E. coli
His-GST
48.7 kDa
10 µg/$294; 50 µg/$522; 100 µg/$832; 200 µg/$1,034; 1 mg/$2,192; 500 µg/$1,712; 5 mg/$3,641; 2 mg/$2,383
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The data on this page has been compiled from LifeSpan internal sources, the National Center for Biotechnology Information (NCBI), and The Universal Protein Resource (UniProt).