By A. M. Gounot (auth.), Professor Rosa Margesin, Professor Franz Schinner (eds.)
Major components of the oceans and lands of our planet are completely, or briefly, uncovered to temperatures less than 10 C. Microorganisms, crops and animals dwelling less than those stipulations have tailored to their environments in the sort of method that metabolic methods, copy and survival ideas are optimum for his or her typical biotopes. This publication offers the latest wisdom of the ecology and the body structure of cold-adapted microorganisms, crops and animals, and explains the mechanisms of cold-adaptation at the enzymatic and molecular point, together with effects from the 1st crystal buildings of enzymes of cold-adapted organisms.
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Extra info for Cold-Adapted Organisms: Ecology, Physiology, Enzymology and Molecular Biology
The winter cover of a high-mountain lake (Estany Redo, Pyrenees). Water Resour Res 1989; 25:519-527. 7. Meguro H. Plankton ice in the Antarctic Ocean. Antarctic Rec 1962; 14:192-199. 8. Fritsen CH, Adams EE, McKay CP, Priscu Je. Permanent ice covers of the McMurdo Dry Valley Lakes, Antarctica: Liquid water content. In: Priscu Je, ed. Ecosystem Dynamics in a Polar Desert: The McMurdo Dry Valleys, Antarctica. Antarctic Res Ser, vol 72. Washington DC: Am Geophys Union, 1998:269-280. 9. Andreatta S.
58 The NAD+-specific glutamate dehydrogenase of Bacillus cereus DSM31 is cold-labile and loss of activity in the cold was found to be due to dissociation of the holoenzyme into catalytically inactive subunits, which was reversible under certain conditions. 59 The phenomenon of cold denaturation of proteins has been discussed fully by Privaloy6O and the proteins of cold-adapted bacteria must be folded in such a way as to not only retain activity at low temperatures but also to avoid denaturation.
Rather, active and diverse microbial communities develop in ice covers of distinct geographical regions of the world. The role of these communities in their respective ecosystems is still under study. In alpine lakes where the volume of the ice cover comprises a large portion of the total lake volume, the ice microbes may produce a substantial fraction of the Lake ice microbial communities in alpine and antarctic lakes 29 ecosystem's biomass during extended periods of the year. In permanently ice-covered lakes in Antarctica, the contribution of the ice communities to the overall productivity of the lake ecosystem is relatively small.