Can Antarctic microalgae produce ice-binding proteins?
- Can Antarctic microalgae produce ice-binding proteins?
- Other Titles
- 남극 미세조류는 얼음결합 단백질을 만들어낼 수 있는가?
- Antarctic microalgae; ice-binding protein
- Issue Date
- Raymond, Kang, Sung-Ho, Kang, Jae-Shin. 2004. Can Antarctic microalgae produce ice-binding proteins?. 2004.09.09~.
- Attempts to use natural antifreeze proteins to protect cells and tissues from freezing
damage have had mixed results (1). Some success has been achieved in preventing hemolysis of red blood cells (2,3) and maintaining sperm motility (4,5). There is some evidence that the protective effect of the antifreeze proteins is due to their ability to inhibit the recrystallization of ice. Ice-binding proteins (IBPs
formerly called ice-active substances, or IASs) from an Antarctic sea ice diatom (6) and other Antarctic photosynthetic organisms (7) can inhibit the recrystallization of ice at concentrations in the microgram ml-1 range. At natural concentrations in seawater, the IBPs cause pitting and other changes in the habit of ice crystals, which are an
indication that they adsorb to the ice surface (8). Other evidence of ice binding by IBPs is their preferential incorporation in the ice phase of partially frozen solutions (9) and incorporation in ice hemispheres (6). Unlike antifreeze proteins, the IBPs do not significantly lower the freezing point. Rather their function appears to be prevention of damage in the frozen state as they have been shown to increase survival of diatoms subjected to a freeze-thaw cycle (6,10). These latter results encouraged us to evaluate the ability of an algal IBP to reduce freezing damage to
another cell type, red blood cells.
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