The 5S rDNA family evolves through concerted and birth-and-death evolution in fish genomes: an example from freshwater stingrays.

ABSTRACT:

Background

Ribosomal 5S genes are well known for the critical role they play in ribosome folding and functionality. These genes are thought to evolve in a concerted fashion, with high rates of homogenization of gene copies. However, the majority of previous analyses regarding the evolutionary process of rDNA repeats were conducted in invertebrates and plants. Studies have also been conducted on vertebrates, but these analyses were usually restricted to the 18S, 5.8S and 28S rRNA genes. The recent identification of divergent 5S rRNA gene paralogs in the genomes of elasmobranches and teleost fishes indicate that the eukaryotic 5S rRNA gene family has a more complex genomic organization than previously thought. The availability of new sequence data from lower vertebrates such as teleo

SUBMITTER: Pinhal D 

PROVIDER: S-EPMC3123226 | biostudies-literature | 2011 May

REPOSITORIES: biostudies-literature