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A carrot leucine-rich-repeat protein that inhibits ice recrystallization

Research output: Contribution to journalJournal article

Published

  • D Worrall
  • L Elias
  • D Ashford
  • M Smallwood
  • C Sidebottom
  • P Lillford
  • J Telford
  • C Holt
  • D Bowles
Journal publication date2/10/1998
JournalScience
Journal number5386
Volume282
Number of pages3
Pages115-117
Original languageEnglish

Abstract

Many organisms adapted to live at subzero temperatures express antifreeze proteins that improve their tolerance to freezing. Although structurally diverse, all antifreeze proteins interact with ice surfaces, depress the freezing temperature of aqueous solutions, and inhibit ice crystal growth. A protein purified from carrot shares these functional features with antifreeze proteins of fish. Expression of the carrot complementary DNA in tobacco resulted in the accumulation of antifreeze activity in the apoplast of plants grown at greenhouse temperatures. The sequence of carrot antifreeze protein is similar to that of polygalacturonase inhibitor proteins and contains leucine-rich repeats.