Characterization of the human secretory component gene promoter.
Secretory Component (SC) is a receptor molecule implicated in the transepithelial transport of polymeric immunoglobulins. We have cloned and characterized the first exon, part of the first intron and 3500 bp of the upstream region of the gene and determined the transcription initiation region. A GC rich region immediately upstream of the transcription start region is interrupted by a potential TATA-box (TTTAA) at position -28. Promoter activity was demonstrated in transient transfection experiments in HepG2 and HeLa cells. The smallest fragment still showing transcriptional activity contains 48 bp of SC promoter. A number of putative recognition sites for transcription factors possibly involved in the regulation of SC transcription by steroids, peptide hormones and cytokines were found in the upstream region.
Verrijdt
G
G
Division of Biochemistry, University of Leuven, Belgium.
Swinnen
J
J
Peeters
B
B
Verhoeven
G
G
Rombauts
W
W
Claessens
F
F
D001483:Base Sequence; D002460:Cell Line; D003001:Cloning, Molecular; D016384:Consensus Sequence; D018899:CpG Islands; D004247:DNA / Q000235:genetics; D017931:DNA Primers / Q000235:genetics; D005091:Exons; D006367:HeLa Cells; D006801:Humans; D007438:Introns; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic; D015183:Restriction Mapping; D012635:Secretory Component / Q000235:genetics*; D016385:TATA Box; D014158:Transcription, Genetic
D017931:DNA Primers; D012635:Secretory Component; D004247:DNA