A hyperactive, Ca2+-dependent antifreeze protein in an Antarctic bacterium
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 unchara...
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fthighwire:oai:open-archive.highwire.org:femsle:245/1/67 2023-05-15T13:48:39+02:00 A hyperactive, Ca2+-dependent antifreeze protein in an Antarctic bacterium Gilbert, Jack A. Davies, Peter L. Laybourn-Parry, Johanna 2005-04-01 00:00:00.0 text/html http://femsle.oxfordjournals.org/cgi/content/short/245/1/67 https://doi.org/10.1016/j.femsle.2005.02.022 en eng Oxford University Press http://femsle.oxfordjournals.org/cgi/content/short/245/1/67 http://dx.doi.org/10.1016/j.femsle.2005.02.022 Copyright (C) 2005, Oxford University Press Articles TEXT 2005 fthighwire https://doi.org/10.1016/j.femsle.2005.02.022 2016-11-16T17:51:30Z 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 °C 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. Text Antarc* Antarctic HighWire Press (Stanford University) Antarctic FEMS Microbiology Letters 245 1 67 72 |
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HighWire Press (Stanford University) |
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English |
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Articles |
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Articles Gilbert, Jack A. Davies, Peter L. Laybourn-Parry, Johanna A hyperactive, Ca2+-dependent antifreeze protein in an Antarctic bacterium |
topic_facet |
Articles |
description |
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 °C 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. |
format |
Text |
author |
Gilbert, Jack A. Davies, Peter L. Laybourn-Parry, Johanna |
author_facet |
Gilbert, Jack A. Davies, Peter L. Laybourn-Parry, Johanna |
author_sort |
Gilbert, Jack A. |
title |
A hyperactive, Ca2+-dependent antifreeze protein in an Antarctic bacterium |
title_short |
A hyperactive, Ca2+-dependent antifreeze protein in an Antarctic bacterium |
title_full |
A hyperactive, Ca2+-dependent antifreeze protein in an Antarctic bacterium |
title_fullStr |
A hyperactive, Ca2+-dependent antifreeze protein in an Antarctic bacterium |
title_full_unstemmed |
A hyperactive, Ca2+-dependent antifreeze protein in an Antarctic bacterium |
title_sort |
hyperactive, ca2+-dependent antifreeze protein in an antarctic bacterium |
publisher |
Oxford University Press |
publishDate |
2005 |
url |
http://femsle.oxfordjournals.org/cgi/content/short/245/1/67 https://doi.org/10.1016/j.femsle.2005.02.022 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://femsle.oxfordjournals.org/cgi/content/short/245/1/67 http://dx.doi.org/10.1016/j.femsle.2005.02.022 |
op_rights |
Copyright (C) 2005, Oxford University Press |
op_doi |
https://doi.org/10.1016/j.femsle.2005.02.022 |
container_title |
FEMS Microbiology Letters |
container_volume |
245 |
container_issue |
1 |
container_start_page |
67 |
op_container_end_page |
72 |
_version_ |
1766249551040086016 |