Expansion and diversification of the SET domain gene family following whole-genome duplications in Populus trichocarpa.

ABSTRACT:

Background

Histone lysine methylation modifies chromatin structure and regulates eukaryotic gene transcription and a variety of developmental and physiological processes. SET domain proteins are lysine methyltransferases containing the evolutionarily-conserved SET domain, which is known to be the catalytic domain.

Results

We identified 59 SET genes in the Populus genome. Phylogenetic analyses of 106 SET genes from Populus and Arabidopsis supported the clustering of SET genes into six distinct subfamilies and identified 19 duplicated gene pairs in Populus. The chromosome locations of these gene pairs and the distribution of synonymous substitution rates showed that the expansion of the SET gene family might be caused by large-scale duplications in Populus. Comparison of gene

SUBMITTER: Lei L 

PROVIDER: S-EPMC3402991 | biostudies-literature | 2012 Apr

REPOSITORIES: biostudies-literature