Nucleic Acids Research, Vol 25, Issue 8 1591-1596, Copyright © 1997 by Oxford University Press
N Selvamurugan, OH Joost, ES Haas, JW Brown, NJ Galvin and GL Eliceiri
Three human small nucleolar RNAs (snoRNAs), E1, E2 and E3, were reported
earlier that have unique sequences, interact directly with unique segments
of pre-rRNA in vivo and are encoded in introns of protein genes. In the
present report, human and frog E1, E2 and E3 RNAs injected into the
cytoplasm of frog oocytes migrated to the nucleus and specifically to the
nucleolus. This indicates that the nucleolar and nuclear localization
signals of these snoRNAs reside within their evolutionarily conserved
segments. Homologs of these snoRNAs from several vertebrates were sequenced
and this information was used to develop RNA secondary structure models.
These snoRNAs have unique phylogenetically conserved sequences.
ARTICLES
Intracellular localization and unique conserved sequences of three small nucleolar RNAs
Department of Pathology, St Louis University School of Medicine, St Louis, MO 63104-1028, USA.
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