Barley DNA-binding methionine aminopeptidase, which changes the localization from the nucleus to the cytoplasm by low temperature, is involved in freezing tolerance

Hee Jeong Jeong, Jeong Sheop Shin, Sung Han Ok

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The polymerase chain reaction-based Mirror Orientation Selection (MOS) method was used to isolate low temperature-induced genes from cold-treated winter barley (Hordeum vulgare L. cv. Dongbori). MOS screening identified a novel methionine (Met) aminopeptidase (MAP) designated as HvMAP. The deduced HvMAP protein was determined to possess an aminopeptidase domain and a nuclear localization signal. An in vitro enzyme assay using recombinant HvMAP protein demonstrated MAP activity. The expression of this gene was induced by low temperature and abscisic acid treatment, and overexpression of this gene conferred stronger freezing tolerance to Arabidopsis transgenic plants as compared to wild-type plants. Interestingly, low temperature treatment changed the localization of HvMAP from the nucleus to the cytoplasm. These findings suggest that HvMAP is a novel MAP that functions in freezing tolerance by facilitating protein maturation.

Original languageEnglish
Pages (from-to)53-60
Number of pages8
JournalPlant Science
Volume180
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

Keywords

  • Barley
  • Freezing tolerance
  • Low-temperature
  • Methionine aminopeptidase

ASJC Scopus subject areas

  • Genetics
  • Agronomy and Crop Science
  • Plant Science

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