Author:
Varriale Annalisa,Torelli Giuseppe,Bernardi Giorgio
Abstract
In order to investigate the influence of temperature on the GC level of the paired sequences of ribosomal 18S RNAs in vertebrates, we have studied their base composition in cold- and warm-blooded vertebrates using a stem-by-stem comparison. We observed that a number of stems of 18S ribosomal RNAs (rRNAs) are variable among species and that the majority of such stems are GC richer in warm-blooded than in cold-blooded vertebrates. We also constructed the secondary structures of the 18S rRNAs of a polar fish, a marsupial, and a monotreme to compare them with those of temperate/tropical fishes and of eutherians, respectively. In these cases, differences similar to those already mentioned were found. We conclude that there is a correlation between stem stability and body temperature even within the relatively limited temperature range of vertebrates.
Publisher
Cold Spring Harbor Laboratory
Reference34 articles.
1. Limitations of Metazoan 18S rRNA Sequence Data: Implications for Reconstructing a Phylogeny of the Animal Kingdom and Inferring the Reality of the Cambrian Explosion
2. Temperature-based variation of rRNA secondary structure models: a case study in the insect Drosophila simulans, the land snail Isabellaria adriani, and the crustacean Daphnia pulex
3. Benzecri, J.P. (1973) L'analyse des données, L'Analyse des Correspondances, 2 (Dunod, Paris, France).
4. The vertebrate genome: Isochores and evolution;Bernardi,;Mol. Biol. Evol.,1993
5. Bernardi, G. (2005) Structural and evolutionary genomics. Natural selection in genome evolution (Elsevier, Amsterdam, The Netherlands).
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