Reference: Granneman S and Baserga SJ (2005) Crosstalk in gene expression: coupling and co-regulation of rDNA transcription, pre-ribosome assembly and pre-rRNA processing. Curr Opin Cell Biol 17(3):281-6

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Abstract


Ribosomes, the large RNPs that translate mRNA into protein in the cytoplasm of eukaryotic cells, are synthesized in a subcompartment of the nucleus, the nucleolus. There, transcription by Pol I yields a pre-rRNA which is modified, cleaved and assembled with ribosomal proteins to make functional ribosomes. Previously, rRNA transcription and pre-rRNA cleavage in eukaryotes were considered to be separable steps in gene expression. However, recent findings suggest that these two steps in gene expression can be concurrent and are co-regulated. Unexpectedly, optimal rDNA transcription requires the presence of a defined subset of components of the pre-rRNA processing machinery.

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Journal Article | Research Support, N.I.H., Extramural | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, Non-P.H.S. | Research Support, U.S. Gov't, P.H.S. | Review
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Granneman S, Baserga SJ
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