title: Genome-wide identification and evolutionary analysis of Arabidopsis sm genes family.
abstract: Sm proteins are members of a family of small proteins that are widespread in biosphere and found associated with RNA metabolism. To date, to our knowledge, only Arabidopsis SAD1 gene has been studied functionally in plant. In this study, 42 Sm genes are identified through comprehensive analysis in Arabidopsis. And a complete overview of this gene family is presented, including the gene structures, phylogeny, chromosome locations, selection pressure and expression. The results reveal that gene duplication contributes to the expansion of the Sm gene family in Arabidopsis genome, diverse expression patterns suggest their functional differentiation and divergence analysis indicates purifying selection as a key role in evolution. Our comparative genomics analysis of Sm genes will provide the first step towards the future experimental research on determining the functions of these genes.
authors.affiliation: Institute of Life Science, Jiangsu University, Xuefu Road 301, Zhenjiang 212013, Jiangsu, PR China. cjinfor@163.com
authors.forename: Jun
authors.initials: J
authors.lastname: Cao
authors.forename: Feng
authors.initials: F
authors.lastname: Shi
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Liu
authors.forename: Jinli
authors.initials: J
authors.lastname: Jia
authors.forename: Jun
authors.initials: J
authors.lastname: Zeng
authors.forename: Guang
authors.initials: G
authors.lastname: Huang
mesh_terms: D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000235:genetics*; D029681:Arabidopsis Proteins / Q000145:classification / Q000235:genetics* / Q000378:metabolism; D002874:Chromosome Mapping; D019143:Evolution, Molecular; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D018745:Genome, Plant; D008969:Molecular Sequence Data; D005810:Multigene Family; D010802:Phylogeny; D016415:Sequence Alignment
chemical_list: D029681:Arabidopsis Proteins