Sulfotransferase Family 1E, Member 1 (SULT1E1)

SULT1E1 contains 9 short exons separated by 8 introns in an expanse of approximately 7.7 kb. The first 2 exons, named exon 1a and exon 1b, are noncoding and correspond to the 5-prime untranslated sequences of human brain and human placental estrogen sulfotransferase cDNAs, respectively. Transfection of chloramphenicol acetyltransferase reporter gene vectors containing the 5-prime flanking sequence upstream from exon 1a and exon 1b into human adrenal adenocarcinoma cells indicated that both sequences possess promoter activity. The results were interpreted as indicating that human brain aryl sulfotransferase and placental estrogen sulfotransferase mRNA species are transcribed from a single gene by alternate exon 1a and exon 1b promoters, respectively.