| Literature DB >> 25716091 |
Linh-Phuong Nguyen1, Nicolas Galtier1, Benoit Nabholz2.
Abstract
The higher rate of non-synonymous over synonymous substitutions (dN/dS) of the X chromosome compared with autosomes is often interpreted as a consequence of X hemizygosity. However, other factors, such as gene expression, are also known to vary between X and autosomes. Analysing 4800 orthologues in six mammals, we found that gene expression levels, associated with GC content, fully account for the variation in dN/dS between X and autosomes with no detectable effect of hemizygosity. We also report an extensive variance in dN/dS and gene expression between autosomes.Keywords: X chromosome; fast-X; gene expression; hemizygosity; non-synonymous substitutions; synonymous substitutions
Mesh:
Year: 2015 PMID: 25716091 PMCID: PMC4360113 DOI: 10.1098/rsbl.2015.0010
Source DB: PubMed Journal: Biol Lett ISSN: 1744-9561 Impact factor: 3.703