Evolution of non-specific lipid transfer protein (nsLTP) genes in the Poaceae family

Their duplication and diversity

Cheol Seong Jang, Won Cheol Yim, Jun Cheol Moon, Je Hyeong Jung, Tong Geon Lee, Sung Don Lim, Seon Hae Cho, Kwang Kook Lee, Wook Kim, Yong Weon Seo, Byung Moo Lee

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Previously, the genes encoding non-specific lipid transfer proteins (nsLTPs) of the Poaceae family appear to evidence different genomic distribution and somewhat different shares of EST clones, which is suggestive of independent duplication(s) followed by functional diversity. To further evaluate the evolutionary fate of the Poaceae nsLTP genes, we have identified Ka/Ks values, conserved, mutated or lost cis-regulatory elements, responses to several elicitors, genome-wide expression profiles, and nsLTP gene-coexpression networks of both (or either) wheat and rice. The Ka/Ks values within each group and between groups appeared to be similar, but not identical, in both species. The conserved cis-regulatory elements, e.g. the RY repeat (CATGCA) element related to ABA regulation in group A, might be reflected in some degree of long-term conservation in transcriptional regulation postdating speciation. In group A, wheat nsLTP genes, with the exception of TaLTP4, evidenced responses similar to those of plant elicitors; however, the rice nsLTP genes evidenced differences in expression profiles, even though the genes of both species have undergone purifying selection, thereby suggesting their independent functional diversity. The expression profiles of rice nsLTP genes with a microarray dataset of 155 gene expression omnibus sample (GSM) plates suggest that subfunctionalization is not the sole mechanism inherent to the evolutionary history of nsLTP genes but may, rather, function in concert with other mechanism(s). As inferred by the nsLTP gene-coexpression networks, the functional diversity of nsLTP genes appears not to be randomized, but rather to be specialized in the direction of specific biological processes over evolutionary time.

Original languageEnglish
Pages (from-to)481-497
Number of pages17
JournalMolecular Genetics and Genomics
Volume279
Issue number5
DOIs
Publication statusPublished - 2008 May 1

Fingerprint

Poaceae
Genes
Gene Regulatory Networks
Triticum
Biological Phenomena
sterol carrier proteins
Expressed Sequence Tags
Gene encoding
Response Elements
Transcriptome
Global system for mobile communications
Microarrays
Gene expression
Clone Cells
Conservation
History
Genome
Gene Expression

Keywords

  • Duplication
  • Evolutionary fate
  • Functional diversity
  • Gene family
  • nsLTP
  • Poaceae

ASJC Scopus subject areas

  • Genetics

Cite this

Evolution of non-specific lipid transfer protein (nsLTP) genes in the Poaceae family : Their duplication and diversity. / Jang, Cheol Seong; Yim, Won Cheol; Moon, Jun Cheol; Jung, Je Hyeong; Lee, Tong Geon; Lim, Sung Don; Cho, Seon Hae; Lee, Kwang Kook; Kim, Wook; Seo, Yong Weon; Lee, Byung Moo.

In: Molecular Genetics and Genomics, Vol. 279, No. 5, 01.05.2008, p. 481-497.

Research output: Contribution to journalArticle

Jang, Cheol Seong ; Yim, Won Cheol ; Moon, Jun Cheol ; Jung, Je Hyeong ; Lee, Tong Geon ; Lim, Sung Don ; Cho, Seon Hae ; Lee, Kwang Kook ; Kim, Wook ; Seo, Yong Weon ; Lee, Byung Moo. / Evolution of non-specific lipid transfer protein (nsLTP) genes in the Poaceae family : Their duplication and diversity. In: Molecular Genetics and Genomics. 2008 ; Vol. 279, No. 5. pp. 481-497.
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