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JBC, Vol. 250, Issue 22, 8591-8597, Nov, 1975

Structural analyses of mammalian ribosomal ribonucleic acid and its precursors. Nucleotide sequence of ribosomal 5.8 S ribonucleic acid

R. N. Nazar, T. O. Sitz and H. Busch

The nucleotide sequence of ribosomal 5.8 S RNA (also known as 7 S or 5.5 S rRNA) from Novikoff hepatoma ascites cells has been determined to be (see article). Estimations of the secondary structure based upon maximized base pairing and the fragments of partial ribonuclease digestion indicate that there may be five base-paired regions in the molecule, three forming a folding of the termini and two forming secondary hairpin loops. The sequence of Novikoff hepatoma 5.8 S rRNA is about 75% homologous with that of yeast 5.8 S rRNA (Rubin, G.M. (1973) J. Biol. Chem. 248, 3860-3875) and similar models for secondary structure are proposed. Both models contain a very stable G-C rich hairpin loop (residues 116 to 138), a less stable A-U-rich hairpin loop (residues 64 to 91) and two symmetrical bulges (residues 15 to 25 and 40 to 44).
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