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Title: High resolution studies of the Xenopus laevis ribosomal gene promoter in vivo and in vitro
Authors: Read, C.
Larose, A.-M.
Leblanc, B.
Bannister, A.J.
Firek, S.
Smith, D.R. 
Moss, T.
Issue Date: 5-Jun-1992
Citation: Read, C.,Larose, A.-M.,Leblanc, B.,Bannister, A.J.,Firek, S.,Smith, D.R.,Moss, T. (1992-06-05). High resolution studies of the Xenopus laevis ribosomal gene promoter in vivo and in vitro. Journal of Biological Chemistry 267 (16) : 10961-10967. ScholarBank@NUS Repository.
Abstract: The first high resolution maps of the Xenopus laevis ribosomal promoter and its flanking regions (-179 to +14) have been created by assaying point mutants both in oocyte and in vitro. Within the promoter boundaries (-141(-145) to +3(+4)), domains analogous to the Core Promoter and "Upstream Control Element" (UCE) were clearly detected. The base pairs at -133, within the UCE, and -20, -10, -7, and +3, within the Core, were all shown to be especially important for promotion. Between the Core and UCE, two central promoter elements (CPEs) were also resolved. Surprisingly, these CPEs did not correspond to the highly conserved enhancer homology (∼-70 to -110), but to CCCGGCC motifs immediately flanking it. Although xUBF was shown to be a limiting component for in vitro transcription, none of the point mutations was found to affect the interaction of this factor with the promoter.
Source Title: Journal of Biological Chemistry
ISSN: 00219258
Appears in Collections:Staff Publications

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