AHR Monoclonal Antibody (RPT9), Invitrogen™

Description

• MA1-513 detects the aryl hydrocarbon receptor (AhR) from human, mouse, and rat cells
• MA1-513 has been successfully used in immunoprecipitation, chromatin immunoprecipitation, immunocytochemistry, immunohistochemistry, immunofluorescence, and gel shift procedures
• This antibody specifically immunoprecipitates a single ∽95 kDa protein representing AhR from Hepa 1 cytosol
• Although MA1-513 can be used in Western blotting procedures, MA1-514 (clone RPT1) is recommended for this procedure
• The MA1-513 immunogen is a synthetic peptide corresponding to residues R(12) K R R K P(17) V(22) K P I P A E G I K(31) of mouse AhR
• AHR (Ah Receptor) belongs to a family of proteins comprised of its dimerization partner ARNT (HIF-1 Beta) and the Drosophila proteins PER and SIM
• AHR contains an N-terminal sequence of approximately 200 amino acids termed the PAS domain
• AHR, found in a variety of tissues, binds to a specific DNA enhancer sequence and initiates transcription of the mRNA for the cytochrome P-450 (CYPIA1) gene
• The gene for AHR encodes a ligand-activated transcription factor involved in the regulation of biological responses to planar aromatic hydrocarbons
• AHR has been shown to regulate xenobiotic-metabolizing enzymes such as cytochrome P450, and its ligands included a variety of aromatic hydrocarbons
• AHR is a ligand-activated helix/loop/helix transcription factor found in a variety of vertebrate species
• The known ligands for AHR are foreign planar aromatic compounds, such as polycyclic aromatic compounds and halogenated aromatic compounds such as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)
• Unlike the steroid/thyroid hormone receptors, there is no known physiological ligand for AHR
• Studies indicate that in non-ligand activated cells, AHR is found complexed with HSP90 predominantly in the cytoplasm
• Upon binding to an agonist, the ligand-activated AhR is believed to transform to a nuclear, DNA binding form, and this transformation process appears to involve dissociation of HSP90 from AhR followed by formation of a heterodimer with AhR nuclear translocator protein (Arnt)
• Diseases associated with AHR include eosinophilic fasciitis and seborrheic dermatitis.