J. Biol. Chem., Vol. 261, Issue 15, 6647-6650, May, 1986
Control of gene expression by 2,3,7,8-tetrachlorodibenzo-p-dioxin. Multiple dioxin-responsive domains 5'-ward of the cytochrome P1-450 gene
PB Jones, LK Durrin, JM Fisher and JP Whitlock Jr
In mouse hepatoma cells, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)
stimulates cytochrome P1-450 gene transcription via the formation of
TCDD-receptor complexes and the accumulation of the complexes in the
nucleus. Here, we show that the DNA that flanks the 5'-end of the
cytochrome P1-450 gene contains at least two discrete TCDD-responsive
domains. Each domain has properties analogous to those of transcriptional
enhancers. Each domain requires TCDD-receptor complexes for its function.
There is no significant nucleotide sequence homology between the two
TCDD-responsive domains.