Molecular adaptation and expression evolution following duplication of genes for organellar ribosomal protein S13 in rosids.

ABSTRACT:

Background

Gene duplication has been a fundamental process in the evolution of eukaryotic genomes. After duplication one copy (or both) can undergo divergence in sequence, expression pattern, and function. Two divergent copies of the ribosomal protein S13 gene (rps13) of chloroplast origin are found in the nucleus of the rosids Arabidopsis, Gossypium, and Glycine. One encodes chloroplast-imported RPS13 (nucp rps13), while the other encodes mitochondria-imported RPS13 (numit rps13). The rps13 gene has been lost from mitochondrial DNA (mt rps13) of many rosids.

Results

We studied sequence evolution of numit rps13 in comparison with nucp rps13 in seven rosid genera. Ka/Ks analysis and likelihood ratio tests showed considerably higher Ka values and Ka/Ks ratios in numit rps13 th

SUBMITTER: Liu SL 

PROVIDER: S-EPMC2258280 | biostudies-literature | 2008 Jan

REPOSITORIES: biostudies-literature