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Molecular and Cellular Biology, October 2001, p. 6870-6881, Vol. 21, No. 20
Laboratory of Molecular Growth Regulation,
National Institute of Child Health and Human Development, National
Institutes of Health, Bethesda, Maryland,
20892-27531 and Department of Genetics,
Stanford University School of Medicine, Stanford, California
94305-51202
Received 22 June 2001/Accepted 9 July 2001
In addition to directing transcription initiation, core promoters
integrate input from distal regulatory elements. Except for rare
exceptions, it has been generally found that eukaryotic tRNA and rRNA
genes do not contain TATA promoter elements and instead use
protein-protein interactions to bring the TATA-binding protein (TBP),
to the core promoter. Genomewide analysis revealed TATA elements in the
core promoters of tRNA and 5S rRNA (Pol III), U1 to U5 snRNA
(Pol II), and 37S rRNA (Pol I) genes in Schizosaccharomyces pombe. Using tRNA-dependent suppression and other in vivo
assays, as well as in vitro transcription, we demonstrated an
obligatory requirement for upstream TATA elements for tRNA and 5S rRNA
expression in S. pombe. The Pol III initiation factor
Brf is found in complexes with TFIIIC and Pol III in S.
pombe, while TBP is not, consistent with independent
recruitment of TBP by TATA. Template commitment assays are consistent
with this and confirm that the mechanisms of transcription complex
assembly and initiation by Pol III in S. pombe differ
substantially from those in other model organisms. The results were
extended to large-rRNA synthesis, as mutation of the TATA element in
the Pol I promoter also abolishes rRNA expression in fission yeast. A
survey of other organisms' genomes reveals that a substantial number
of eukaryotes may use widespread TATAs for transcription. These results
indicate the presence of TATA-unified transcription systems in
contemporary eukaryotes and provide insight into the residual need for
TBP by all three Pols in other eukaryotes despite a lack of TATA
elements in their promoters.
0270-7306/01/$04.00+0 DOI: 10.1128/MCB.21.20.6870-6881.2001
Widespread Use of TATA Elements in the Core
Promoters for RNA Polymerases III, II, and I in Fission Yeast

*
Corresponding author. Mailing address: 6 Center Dr.,
Rm. 416, Bethesda, MD 20892-2753. Phone: (301) 402-3567. Fax: (301)
480-6863. E-mail: maraiar{at}mail.nih.gov.
Present address: Department of Biochemistry, Saitama Medical
School, Moroyama, Iruma-gun, Saitama, 350-0495, Japan.
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