Characterization of DNA methyltransferase genes in Brassica rapa

Ryo Fujimoto, Taku Sasaki, Takeshi Nishio

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

DNA methylation is essential for normal development and plays important roles in regulating gene expression in plants. Analysis of the key enzymes catalyzing DNA methylation is important to understand epigenetic phenomena. In this study, three putative methyltransferase genes, BrMET1a, BrMET1b, and BrCMT, were isolated from a genome library of Brassica rapa. Structural conservation of the amino acid sequence between BrMET1a/BrMET1b and AtMET1 and that between BrCMT and AtCMT3 suggests that they may function as DNA methyltransferase. BrMET1a was expressed in vegetative and reproductive organs, while BrMET1b was expressed only in pistils, indicating that these two genes have different functions. BrCMT was expressed especially in stamens at the stage of 2-4 days before anthesis. We isolated three DNA methyltransferase genes in Brassica rapa and indicated differences of expression patterns of these DNA methyltransferase genes and expression levels in different tissues and developmental stages, suggesting that these genes might play important roles in epigenetic gene regulation in B. rapa.

Original languageEnglish
Pages (from-to)235-242
Number of pages8
JournalGenes and Genetic Systems
Volume81
Issue number4
DOIs
Publication statusPublished - 2006

Keywords

  • CMT
  • Cytosine methylation
  • Epigenetics
  • Gene expression
  • MET1

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics

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