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Cited by 417

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A Novel Cytoplasmic Protein That Interacts with the Ah Receptor, Contains Tetratricopeptide Repeat Motifs, and Augments the Transcriptional Response to 2,3,7,8-Tetrachlorodibenzo-p-dioxin

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Ma, Qiang, Whitlock, James P.·1997·Journal of Biological Chemistry

Abstract

To identify new proteins involved in dioxin-dependent signal transduction and transcriptional regulation, we used a yeast two-hybrid system to identify proteins that interact with the Ah receptor (AhR). We cloned a mouse cDNA, which encodes a novel approximately 37-kDa protein that binds to AhR; we have designated the protein as Ah receptor-interacting protein (AIP). The amino acid sequence of mouse AIP exhibits homology with members of the FK506-binding protein family. AIP also contains three tetratricopeptide repeat (TPR) motifs; the TPR sequence is present in proteins required for cell cycle control and RNA synthesis and in steroid receptor-binding immunophilins. Coimmunoprecipitation experiments in mouse hepatoma cells reveal that AIP is cytoplasmic and associates with unliganded Ah receptor and with hsp90; 2,3,7,8-tetrachlorodibenzo-p-dioxin treatment disrupts the AhR-AIP-hsp90 interaction. Overexpression of AIP augments the response of the CYP1A1 gene to 2,3,7,8-tetrachlorodibenzo-p-dioxin. Our data suggest that AIP influences ligand receptivity and/or nuclear targeting of AhR.

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Metadata

Authors
Ma, Q., & Whitlock, J. P.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1997-04
Volume
272
Issue
14
Pages
8878-8884
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2062818823
Cited by
417
References
44
FWCI
27.62
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: A Novel Cytoplasmic Protein That Interacts with the Ah Receptor, Contains Tetratricopeptide Repeat Motifs, and Augments the Transcriptional Response to 2,3,7,8-Tetrachlorodibenzo-p-dioxin. https://app.cochat.ai/papers/10.1074/jbc.272.14.8878
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Ma, Q., & Whitlock, J. P. (1997). A Novel Cytoplasmic Protein That Interacts with the Ah Receptor, Contains Tetratricopeptide Repeat Motifs, and Augments the Transcriptional Response to 2,3,7,8-Tetrachlorodibenzo-p-dioxin. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.272.14.8878

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