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Glycine-Rich Antifreeze Proteins from Snow Fleas

2005; American Association for the Advancement of Science; Volume: 310; Issue: 5747 Linguagem: Inglês

10.1126/science.1115145

1095-9203

Laurie A. Graham, Peter L. Davies,

Insect and Pesticide Research

We purified antifreeze proteins from winter-active snow fleas, Hypogastrura harveyi . These 6.5- and 15.7-kilodalton thermolabile proteins are glycine-rich (45% of the residues), and the short isoform is composed of the tripeptide repeat Gly-X-X. This makes them very different from other antifreeze proteins, including two from insects, suggesting independent adaptation to freezing environments.