| Literature DB >> 6550497 |
K P Dudov, K V Hadjiolova, M B Kermekchiev, B S Stanchev, A A Hadjiolov.
Abstract
The pre-rRNA and rRNA components of rat and mouse liver nucleolar RNA were analysed. It was shown that upon denaturation, part of the 32 S pre-rRNA is converted into 28 S rRNA and 12 S RNA. The 12 S RNA from mouse (Mr, 0.36 X 10(6)) is larger than the one from rat (Mr, 0.32 X 10(6). The 12 S RNA chain is intact and resists denaturation treatment. The non-covalent binding of this RNA with nucleolar 28 S rRNA is stronger than that of 5.8 S rRNA with 28 S rRNA. Hybridization with a rat internal-transcribed spacer rDNA fragment identifies 12 S RNA as corresponding to the 5'-end non-conserved segment of 32 S pre-rRNA, including 5.8 S rRNA. The significance of the formation of a 12 S precursor to 5.8 S rRNA in the biogenesis of ribosomes in mammalian cells is discussed.Entities:
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Year: 1983 PMID： 6550497 DOI： 10.1016/0167-4781(83)90047-7
Source DB: PubMed Journal: Biochim Biophys Acta ISSN： 0006-3002