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A hyperactive calcium dependent antifreeze protein in an Antarctic bacterium
Citation
Gilbert, J and Davies, P and Laybourn-Parry, J, A hyperactive calcium dependent antifreeze protein in an Antarctic bacterium, FEMS Microbiology Letters, 245, (1) pp. 67-72. ISSN 0378-1097 (2005) [Refereed Article]
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DOI: doi:10.1016/j.femsle.2005.02.022
Abstract
In cold climates, some plants and bacteria that cannot avoid freezing use antifreeze proteins (AFPs) to lessen the destructive
effects of ice recrystallization. These AFPs have weak freezing point depression activity, perhaps to avoid sudden, uncontrolled
growth of ice. Here, we report on an uncharacteristically powerful bacterial AFP found in an Antarctic strain of the bacterium,
Marinomonas primoryensis. It is Ca2+-dependent, shows evidence of cooperativity, and can produce over 2 rC of freezing point
depression. Unlike most AFPs, it does not produce obvious crystal faceting during thermal hysteresis. This AFP might be capable
of imparting freezing avoidance to M. primoryensis in ice-covered Antarctic lakes. A hyperactive bacterial AFP has not previously
been reported.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Biological Sciences |
| Research Group: | Microbiology |
| Research Field: | Microbial ecology |
| Objective Division: | Environmental Management |
| Objective Group: | Management of Antarctic and Southern Ocean environments |
| Objective Field: | Biodiversity in Antarctic and Southern Ocean environments |
| UTAS Author: | Laybourn-Parry, J (Professor Johanna Laybourn-Parry) |
| ID Code: | 49098 |
| Year Published: | 2005 |
| Web of Science® Times Cited: | 118 |
| Deposited By: | Research Division |
| Deposited On: | 2007-11-13 |
| Last Modified: | 2022-07-06 |
| Downloads: | 0 |
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