Roles of water molecules in bacteria and viruses

Details Roles of water molecules in bacteria and viruses Roles of water molecules in bacteria and viruses

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993oleb...23...29c&link_type=abstract

Origins of Life and Evolution of the Biosphere, Volume 23, Issue 1, pp.29-36

Computer Science

3

Scientific paper

In addition to water, microbes mainly comprise lipids, carbohydrates, proteins and nucleic acids. Their structure and function singularly and conjointly is affected by water activity. Desiccation leads to dramatic lipid phase changes whereas carbohydrates, proteins and nucleic acids initially suffer spontaneous, reversible low activation energy Maillard reactions forming products that more slowly re-arrange, cross-link etc. to give non-native states. While initial products spontaneously may reverse to native states by raising water activity, later products only do so through energy consumption and enzymatic activity eg. repair. Yet, native states of lipid membranes and associated enzymes are required to generate energy. Consequently, good reserves of high energy compounds (e.g. ATP) and of membrane stabilisers (e.g. trehalose) may be expected to enhance survival following drying and rehydration (e.g. anhydrobiotic organisms).

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