. bi o - ph ] 2 4 Ju l 2 01 4 Dynamical mechanism of antifreeze proteins to prevent ice growth
نویسندگان
چکیده
B. Kutschan, K. Morawetz, S. Thoms 1 Münster University of Applied Science, Stegerwaldstrasse 39, 48565 Steinfurt, Germany International Institute of Physics (IIP) Federal University of Rio Grande do Norte Av. Odilon Gomes de Lima 1722, 59078-400 Natal, Brazil Max-Planck-Institute for the Physics of Complex Systems, 01187 Dresden, Germany and Alfred Wegener Institut, Am Handelshafen 12, D-27570 Bremerhaven, Germany
منابع مشابه
Dynamical mechanism of antifreeze proteins to prevent ice growth.
The fascinating ability of algae, insects, and fishes to survive at temperatures below normal freezing is realized by antifreeze proteins (AFPs). These are surface-active molecules and interact with the diffusive water-ice interface thus preventing complete solidification. We propose a dynamical mechanism on how these proteins inhibit the freezing of water. We apply a Ginzburg-Landau-type appro...
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Ice-binding proteins (IBPs) assist in subzero tolerance of multiple cold-tolerant organisms: animals, plants, fungi, bacteria etc. IBPs include: (1) antifreeze proteins (AFPs) with high thermal hysteresis antifreeze activity; (2) low thermal hysteresis IBPs; and (3) ice-nucleating proteins (INPs). Several structurally different IBPs have evolved, even within related taxa. Proteins that produce ...
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Sea raven type II antifreeze protein (SRAFP) is one of three dierent ®sh antifreeze proteins isolated to date. These proteins are known to bind to the surface of ice and inhibit its growth. To solve the three-dimensional structure of SRAFP, study its ice-binding mechanism, and as a basis for engineering these molecules, an ecient system for its biosynthetic production was developed. Several d...
متن کاملMicrofluidic experiments reveal that antifreeze proteins bound to ice crystals suffice to prevent their growth.
Antifreeze proteins (AFPs) are a subset of ice-binding proteins that control ice crystal growth. They have potential for the cryopreservation of cells, tissues, and organs, as well as for production and storage of food and protection of crops from frost. However, the detailed mechanism of action of AFPs is still unclear. Specifically, there is controversy regarding reversibility of binding of A...
متن کاملSuperheating of ice crystals in antifreeze protein solutions.
It has been argued that for antifreeze proteins (AFPs) to stop ice crystal growth, they must irreversibly bind to the ice surface. Surface-adsorbed AFPs should also prevent ice from melting, but to date this has been demonstrated only in a qualitative manner. Here we present the first quantitative measurements of superheating of ice in AFP solutions. Superheated ice crystals were stable for hou...
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