Cloning of a factor required for activity of the Ah (dioxin) receptor
Journal Article
·
· Science (Washington, D.C.); (United States)
- Univ. of California, Los Angeles (United States)
The aryl hydrocarbon (Ah) receptor binds various environmental pollutants, such as polycyclic aromatic hydrocarbons, heterocyclic amines, and polychlorinated aromatic compounds (dioxins, dibenzofurans, and biphenyls), and mediates the carcinogenic effects of these agents. The complementary DNA and part of the gene for an 87-kilodalton human protein that is necessary for Ah receptor function have been cloned. The protein is not the ligand-binding subunit of the receptor but is a factor that is required for the ligand-binding subunit to translocate from the cytosol to the nucleus after binding ligand. The requirement for this factor distinguishes the Ah receptor from the glucocorticoid receptor, to which the Ah receptor has been presumed to be similar. Two portions of the 87-kilodalton protein share sequence similarities with two Drosophila proteins, Per and Sim. Another segment of the protein shows conformity to the consensus sequence for the basic helix-loop-helix motif found in proteins that bind DNA as homodimers or heterodimers.
- DOE Contract Number:
- FC03-87ER60615
- OSTI ID:
- 5696742
- Journal Information:
- Science (Washington, D.C.); (United States), Journal Name: Science (Washington, D.C.); (United States) Vol. 252:5008; ISSN SCIEA; ISSN 0036-8075
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AMINES
AROMATICS
BIOCHEMICAL REACTION KINETICS
CHLORINATED AROMATIC HYDROCARBONS
CLONING
DNA HYBRIDIZATION
DNA-CLONING
GENES
HALOGENATED AROMATIC HYDROCARBONS
HETEROCYCLIC COMPOUNDS
HYBRIDIZATION
HYDROCARBONS
KINETICS
MEMBRANE PROTEINS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLYCYCLIC AROMATIC HYDROCARBONS
PROTEINS
REACTION KINETICS
RECEPTORS
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AMINES
AROMATICS
BIOCHEMICAL REACTION KINETICS
CHLORINATED AROMATIC HYDROCARBONS
CLONING
DNA HYBRIDIZATION
DNA-CLONING
GENES
HALOGENATED AROMATIC HYDROCARBONS
HETEROCYCLIC COMPOUNDS
HYBRIDIZATION
HYDROCARBONS
KINETICS
MEMBRANE PROTEINS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLYCYCLIC AROMATIC HYDROCARBONS
PROTEINS
REACTION KINETICS
RECEPTORS