Structure and application of antifreeze proteins from Antarctic bacteria

@article{Muoz2017StructureAA,
  title={Structure and application of antifreeze proteins from Antarctic bacteria},
  author={Patricio A. Mu{\~n}oz and Sebasti{\'a}n L. M{\'a}rquez and Fernando D. Gonz{\'a}lez-Nilo and Valeria M{\'a}rquez-Miranda and Jenny M. Blamey},
  journal={Microbial Cell Factories},
  year={2017},
  volume={16}
}
BackgroundAntifreeze proteins (AFPs) production is a survival strategy of psychrophiles in ice. [] Key Result Studies using cucumber and zucchini samples showed cellular protection when samples were treated with partially purified AFPs or a commercial AFP as was determined using toluidine blue O and neutral red staining. Additionally, genome analysis of these isolates revealed the presence of genes that encode for putative AFPs.
Antifreeze Proteins and Their Practical Utilization in Industry, Medicine, and Agriculture
TLDR
This review presents the potential applications and physical properties of AFPs and their capability in modifying ice growth leads to the stabilization of ice crystals within a given temperature range and the inhibition of ice recrystallization that decreases the drip loss during thawing.
Potential for resistance to freezing by non-virulent bacteria isolated from Antarctica.
TLDR
Antarctic bacterial present potential for the production of antifreeze compounds and may be considered safe in industrial processes and the characterization of the genes responsible for virulence factors should be carried out to reinforce the potential applicability of such bacteria.
Antifreeze Proteins in Other Species
TLDR
Adaptive ice-nucleating proteins (INPs) function in freeze-tolerant species to inhibit supercooling and promote freezing at a high subzero temperature where the resulting freezing is more easily controlled.
Effect of Marine-Derived Ice-Binding Proteins on the Cryopreservation of Marine Microalgae
TLDR
It is demonstrated that IBPs could improve the viability of cryopreserved microalgal cells by inhibiting ice recrystallization, which is a main cause of cell death in freezing media.
Single-step purification and characterization of antifreeze proteins from leaf and berry of a freeze-tolerant shrub seabuckthorn (Hippophae rhamnoides).
TLDR
This probably is the first report of antifreeze proteins purification from naturally growing seabuckthorn, and validation of these targets may open gates for commercial utilization of this plant growing abundantly in Himalayan regions of India, for crop improvement of freeze susceptible crops or biomedical applications like cryopreservation of tissues and cells.
Molecular insights into the ecology of a psychrotolerant Pseudomonas syringae.
TLDR
A combination of adaptations that may be peculiar to cold-tolerant P. syringae are identified, including increase of unsaturated fatty acids in the plasma-membrane; a RNA polymerase able to function at 0°C; RecBCD- and RuvAB-dependent reestablishment of replication fork; and efficiencies of degradosome machinery and RNA processing by RNaseR at low temperature.
Psychrophilic lifestyles: mechanisms of adaptation and biotechnological tools
TLDR
The current knowledge of the adaptation strategies of cold-adapted microorganisms and the biotechnological perspectives and commercial tools emerging from this knowledge are described.
Identification of Biomolecules Involved in the Adaptation to the Environment of Cold-Loving Microorganisms and Metabolic Pathways for Their Production
TLDR
This Review summarizes current knowledge on psychrophiles as sources of biomolecules and the metabolic pathways for their production and recommends new strategies and next-generation approaches to increase the chances of discovering new biomole molecules.
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TLDR
It will be of interest, therefore, to elucidate the evolutionary forces that have led to the acquisition of functional AFP activity in microbes of the Vestfold Hills lakes and to discover the role the antifreezes play in these organisms.
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Observations indicate that fungal AFPs do not form proper hexagonal ice crystals to inhibit their growth and that fungan AFPs can probably bind to surfaces of ice crystals in an irregular manner.
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Analysis of the enthalpy in each sample by differential scanning calorimetry supported the finding that AFP is a potent cryoprotectant that can reduce the freezing point of water in plant tissues.
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TLDR
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An Antarctic sea ice bacterium of the Gram-negative genus Colwellia produces an extracellular substance that changes the morphology of growing ice that is much smaller than bacterial ice-nucleating proteins and antifreeze proteins that have been previously described.
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