Freezing and Melting Hysteresis Measurements in Solutions of Hyperactive Antifreeze Protein from an Antarctic Bacteria
Antifreeze proteins (AFPs) evolved in cold-adapted organisms and serve to protect them against freezing in cold conditions by arresting ice crystal growth. Recently, we have shown quantitatively that adsorption of AFPs not only prevents ice from growing but also from melting. This melting inhibition...
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ftmarshalluniv:oai:mds.marshall.edu:physics_faculty-1045 2023-05-15T13:50:10+02:00 Freezing and Melting Hysteresis Measurements in Solutions of Hyperactive Antifreeze Protein from an Antarctic Bacteria Celik, Yeliz Drori, Ran Graham, Laurie Mok, Yee-Foong Davies, Peter L. Braslavsky, Ido 2010-01-01T08:00:00Z application/pdf https://mds.marshall.edu/physics_faculty/45 https://mds.marshall.edu/cgi/viewcontent.cgi?article=1045&context=physics_faculty unknown Marshall Digital Scholar https://mds.marshall.edu/physics_faculty/45 https://mds.marshall.edu/cgi/viewcontent.cgi?article=1045&context=physics_faculty Physics Faculty Research Physical Sciences and Mathematics Physics text 2010 ftmarshalluniv 2022-07-11T18:55:20Z Antifreeze proteins (AFPs) evolved in cold-adapted organisms and serve to protect them against freezing in cold conditions by arresting ice crystal growth. Recently, we have shown quantitatively that adsorption of AFPs not only prevents ice from growing but also from melting. This melting inhibition by AFPs, which results in superheated ice (Celik et al, PNAS 2010), is not a well-known phenomenon. Here we present our recent findings in which the Ca2+-dependent hyperactive AFP from Marinomonas primoryensis (MpAFP) clearly displays this property. Additionally, we found that an ice crystal that is initially stabilized and protected by this type of AFP can be overgrown and then melted back to the original crystal. This repeatable process is likely due to melting inhibition, and supports the idea that AFPs bind irreversibly to ice surfaces. Text Antarc* Antarctic Marshall University: Marshall Digital Scholar Antarctic |
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Marshall University: Marshall Digital Scholar |
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Physical Sciences and Mathematics Physics |
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Physical Sciences and Mathematics Physics Celik, Yeliz Drori, Ran Graham, Laurie Mok, Yee-Foong Davies, Peter L. Braslavsky, Ido Freezing and Melting Hysteresis Measurements in Solutions of Hyperactive Antifreeze Protein from an Antarctic Bacteria |
topic_facet |
Physical Sciences and Mathematics Physics |
description |
Antifreeze proteins (AFPs) evolved in cold-adapted organisms and serve to protect them against freezing in cold conditions by arresting ice crystal growth. Recently, we have shown quantitatively that adsorption of AFPs not only prevents ice from growing but also from melting. This melting inhibition by AFPs, which results in superheated ice (Celik et al, PNAS 2010), is not a well-known phenomenon. Here we present our recent findings in which the Ca2+-dependent hyperactive AFP from Marinomonas primoryensis (MpAFP) clearly displays this property. Additionally, we found that an ice crystal that is initially stabilized and protected by this type of AFP can be overgrown and then melted back to the original crystal. This repeatable process is likely due to melting inhibition, and supports the idea that AFPs bind irreversibly to ice surfaces. |
format |
Text |
author |
Celik, Yeliz Drori, Ran Graham, Laurie Mok, Yee-Foong Davies, Peter L. Braslavsky, Ido |
author_facet |
Celik, Yeliz Drori, Ran Graham, Laurie Mok, Yee-Foong Davies, Peter L. Braslavsky, Ido |
author_sort |
Celik, Yeliz |
title |
Freezing and Melting Hysteresis Measurements in Solutions of Hyperactive Antifreeze Protein from an Antarctic Bacteria |
title_short |
Freezing and Melting Hysteresis Measurements in Solutions of Hyperactive Antifreeze Protein from an Antarctic Bacteria |
title_full |
Freezing and Melting Hysteresis Measurements in Solutions of Hyperactive Antifreeze Protein from an Antarctic Bacteria |
title_fullStr |
Freezing and Melting Hysteresis Measurements in Solutions of Hyperactive Antifreeze Protein from an Antarctic Bacteria |
title_full_unstemmed |
Freezing and Melting Hysteresis Measurements in Solutions of Hyperactive Antifreeze Protein from an Antarctic Bacteria |
title_sort |
freezing and melting hysteresis measurements in solutions of hyperactive antifreeze protein from an antarctic bacteria |
publisher |
Marshall Digital Scholar |
publishDate |
2010 |
url |
https://mds.marshall.edu/physics_faculty/45 https://mds.marshall.edu/cgi/viewcontent.cgi?article=1045&context=physics_faculty |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Physics Faculty Research |
op_relation |
https://mds.marshall.edu/physics_faculty/45 https://mds.marshall.edu/cgi/viewcontent.cgi?article=1045&context=physics_faculty |
_version_ |
1766253143615602688 |