A complex that contains proteins binding to the PSE and TATA sites in a human U6 small nuclear RNA promoter.
The proximal promoter of a human U6 small nuclear RNA (snRNA)-encoding gene contains two separate elements, the proximal sequence element (PSE) and the TATA box. We investigated the interaction of the PSE- and TATA-binding proteins (PBP and TBP) with normal and mutant U6 proximal promoters using an electrophoretic mobility shift assay. We detected a complex containing both PBP and TBP bound to the wild-type U6 promoter. Efficient formation of the triple complex was dependent on the presence of the PSE and the TATA box on the template DNA. Mutant U6 promoters containing an increased spacing between the PSE and TATA box of 5 or 10 bp were impaired in the ability to form a complex that includes TBP. We infer from these results that PBP and TBP interact when their binding sites are properly positioned in a U6 gene promoter.
Department of Biochemistry and Biophysics, Texas A&M University, College Station 77843-2128.
R S
RS
Goomer
O
O
Urso
G R
GR
Kunkel
D001483:Base Sequence; D017931:DNA Primers; D004268:DNA-Binding Proteins / Q000378:metabolism*; D006801:Humans; D008969:Molecular Sequence Data; D009154:Mutation; D011401:Promoter Regions, Genetic; D012342:RNA, Small Nuclear / Q000235:genetics*; D016385:TATA Box; D035181:TATA-Box Binding Protein; D014157:Transcription Factors / Q000378:metabolism*; D014158:Transcription, Genetic
D017931:DNA Primers; D004268:DNA-Binding Proteins; D012342:RNA, Small Nuclear; D035181:TATA-Box Binding Protein; D014157:Transcription Factors