AHR

This gene encodes a ligand-activated transcription factor involved in the regulation of biological responses to planar aromatic hydrocarbons. This receptor has been shown to regulate xenobiotic-metabolizing enzymes such as cytochrome P450. Its ligands included a variety of aromatic hydrocarbons. [provided by RefSeq]

aryl hydrocarbon receptor

Ligand-activated transcription factor that enables cells to adapt to changing conditions by sensing compounds from the environment, diet, microbiome and cellular metabolism, and which plays important roles in development, immunity and cancer. Upon ligand binding, translocates into the nucleus, where it heterodimerizes with ARNT and induces transcription by binding to xenobiotic response elements (XRE). Regulates a variety of biological processes, including angiogenesis, hematopoiesis, drug and lipid metabolism, cell motility and immune modulation. Xenobiotics can act as ligands: upon xenobiotic-binding, activates the expression of multiple phase I and II xenobiotic chemical metabolizing enzyme genes (such as the CYP1A1 gene). Mediates biochemical and toxic effects of halogenated aromatic hydrocarbons. Next to xenobiotics, natural ligands derived from plants, microbiota, and endogenous metabolism are potent AHR agonists. Tryptophan (Trp) derivatives constitute an important class of endogenous AHR ligands. Acts as a negative regulator of anti-tumor immunity: indoles and kynurenic acid generated by Trp catabolism act as ligand and activate AHR, thereby promoting AHR-driven cancer cell motility and suppressing adaptive immunity. Regulates the circadian clock by inhibiting the basal and circadian expression of the core circadian component PER1 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.

Apoptotic process
Blood vessel development
cAMP-mediated signaling
Cell cycle
Cellular response to 2,3,7,8-tetrachlorodibenzodioxine
Cellular response to cAMP
Cellular response to forskolin
Circadian regulation of gene expression
Negative regulation of T cell mediated immune response to tumor cell
Negative regulation of transcription, DNA-templated
Positive regulation of transcription, DNA-templated
Positive regulation of transcription by RNA polymerase II
Regulation of adaptive immune response
Regulation of B cell proliferation
Regulation of gene expression
Regulation of transcription, DNA-templated
Regulation of transcription by RNA polymerase II
Response to toxic substance
Response to xenobiotic stimulus
Xenobiotic metabolic process

Cytoplasm; Nucleus. Initially cytoplasmic; upon binding with ligand and interaction with a HSP90, it translocates to the nucleus.

Retinitis pigmentosa 85 (RP85): A form of retinitis pigmentosa, a retinal dystrophy belonging to the group of pigmentary retinopathies. Retinitis pigmentosa is characterized by retinal pigment deposits visible on fundus examination and primary loss of rod photoreceptor cells followed by secondary loss of cone photoreceptors. Patients typically have night vision blindness and loss of midperipheral visual field. As their condition progresses, they lose their far peripheral visual field and eventually central vision as well. RP85 is an autosomal recessive form manifesting as early-onset progressive difficulty to adapt in dim light and gradually decreasing visual acuity in both eyes.

Mono-ADP-ribosylated, leading to inhibit transcription activator activity of AHR.