Aryl hydrocarbon receptor - P35869 (AHR_HUMAN)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

Ligand-activated transcriptional activator. Binds to the XRE promoter region of genes it activates (PubMed:10395741, PubMed:28602820, PubMed:7961644, PubMed:23275542, PubMed:30373764). Activates the expression of multiple phase I and II xenobiotic chemical metabolizing enzyme genes (such as the CYP1A1 gene) (PubMed:7961644). Mediates biochemical and toxic effects of halogenated aromatic hydrocarbons (PubMed:7961644). Involved in cell-cycle regulation (PubMed:12213388). Likely to play an important role in the development and maturation of many tissues (PubMed:12213388). Regulates the circadian clock by inhibiting the basal and circadian expression of the core circadian component PER1 (PubMed:28602820). Inhibits PER1 by repressing the CLOCK-ARNTL/BMAL1 heterodimer mediated transcriptional activation of PER1. The heterodimer ARNT:AHR binds to core DNA sequence 5'-TGCGTG-3' within the dioxin response element (DRE) of target gene promoters and activates their transcription (PubMed:28602820). UniProt
Pathway Maps
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Subunit Structure
Homodimer (By similarity). Binds MYBBP1A (By similarity). Efficient DNA binding requires dimerization with another bHLH protein. Interacts with coactivators including SRC-1, RIP140 and NOCA7, and with the corepressor SMRT. Interacts with NEDD8 and IVNS1ABP. Interacts with ARNTL/BMAL1. Interacts with HSP90AB1 (By similarity). Interacts with ARNT; the heterodimer ARNT:AHR binds to core DNA sequence 5'-TGCGTG-3' within the dioxin response element (DRE) of target gene promoters and activates their transcription (PubMed:28602820). Interacts with TIPARP; leading to mono-ADP-ribosylation of AHR and subsequent inhibition of AHR (PubMed:23275542, PubMed:30373764). UniProt
The PAS 1 domain is essential for dimerization and also required for AHR:ARNT heterodimerization. UniProt
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