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Nucleic Acids Research, Vol 26, Issue 14 3319-3322, Copyright © 1998 by Oxford University Press

ARTICLES

Cytoplasmic ribosomal protein genes of the fission yeast Schizosaccharomyces pombe display a unique promoter type: a suggestion for nomenclature of cytoplasmic ribosomal proteins in databases

T Gross and NF Kaufer
Institut fur Genetik-Biozentrum, Technical University of Braunschweig, Spielmannstrasse 7, 38106 Braunschweig, Germany.

We identified 34 new ribosomal protein genes in the Schizosaccharomyces pombe database at the Sanger Centre coding for 30 different ribosomal proteins. All contain the Homol D-box in their promoter. We have shown that Homol D is, in this promoter type, the TATA-analogue. Many promoters contain the Homol E-box, which serves as a proximal activation sequence. Furthermore, comparative sequence analysis revealed a ribosomal protein gene encoding a protein which is the equivalent of the mammalian ribosomal protein L28. The budding yeast Saccharomyces cerevisiae has no L28 equivalent. Over the past 10 years we have isolated and characterized nine ribosomal protein (rp) genes from the fission yeast S.pombe . This endeavor yielded promoters which we have used to investigate the regulation of rp genes. Since eukaryotic ribosomal proteins are remarkably conserved and several rp genes of the budding yeast S.cerevisiae were sequenced in 1985, we probed DNA fragments encoding S.cerevisiae ribosomal proteins with genomic libraries of S.pombe . The deduced amino acid sequence of the different isolated rp genes of fission yeast share between 65 and 85% identical amino acids with their counterparts of budding yeast.
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