Heat-stable antifreeze protein from grass

We have discovered an antifreeze protein in an overwintering perennial ryegrass, Lolium perenne. The protein is stable at 100 degree C and although it is a less effective antifreeze than proteins found in antarctic fish and insects, it is better at preventing ice recrystallization. This property ena...

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Veröffentlicht in:	Nature (London) 2000-07, Vol.406 (6793), p.256-256
Hauptverfasser:	SIDEBOTTOM, C, BUCKLEY, S, LILLFORD, P, PUDNEY, P, TWIGG, S, JARMAN, C, HOLT, C, TELFORD, J, MCARTHUR, A, WORRALL, D, HUBBARD, R
Format:	Artikel
Sprache:	eng
Schlagworte:	Antifreeze Proteins Biological and medical sciences Freezing Fundamental and applied biological sciences. Psychology Glycoproteins - isolation & purification Glycoproteins - physiology Hot Temperature Ice Lolium perenne Molecular Sequence Data Physical agents Plant physiology and development Plant Proteins - isolation & purification Plant Proteins - physiology Poaceae - chemistry Poaceae - physiology Vegetative apparatus, growth and morphogenesis. Senescence
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Beschreibung
Zusammenfassung:	We have discovered an antifreeze protein in an overwintering perennial ryegrass, Lolium perenne. The protein is stable at 100 degree C and although it is a less effective antifreeze than proteins found in antarctic fish and insects, it is better at preventing ice recrystallization. This property enables grasses to tolerate ice formation in their tissues without being damaged, suggesting that the control of ice-crystal growth rather than the prevention of freezing may have evolved to be the critical factor in their survival at very low temperatures.
ISSN:	0028-0836 1476-4687
DOI:	10.1038/35018639