facultative psychrophilic

Edge evidence

• low temperature is tolerated by facultative psychrophilic

  Facultative psychrophiles can grow at low temperature.

  • DOI:10.1111/j.1574-6941.2009.00727.x capable of growth around 0 °C Review introduction supports low-temperature growth capacity.
• moderate temperature supports optimum of facultative psychrophilic

  Facultative psychrophiles retain optimal growth at moderate temperatures.

  • DOI:10.1111/j.1574-6941.2009.00727.x optimum temperatures >20 °C Supports distinction from obligate psychrophiles.
• low temperature decreases membrane fluidity RO:0002212

  Cold temperature decreases membrane fluidity.

  • DOI:10.1038/sj.embor.7400662 decreased membrane fluidity Supports membrane rigidification as a cold challenge.
• unsaturated and branched-chain fatty acids regulates membrane fluidity RO:0002211

  Lipid remodeling maintains membrane function during cold growth.

  • DOI:10.1146/annurev-micro-091313-103612 incorporation of proportionally more unsaturated fatty acids Supports homoviscous adaptation during lower-temperature growth.
• cold-shock proteins contributes to facultative psychrophilic RO:0002326

  Cold-shock proteins contribute to growth after temperature downshift.

  • DOI:10.1038/sj.embor.7400662 Cold-shock proteins have also been described Supports cold-shock proteins as cold-acclimation components.
• low temperature induces two-component signaling system

  Cold sensing via membrane physical-state change activates a two-component system.

  • DOI:10.1007/s42770-023-01057-4 sensing the cold... leading to the activation of a two-component system that transduce the signal
• fatty acid desaturase increases unsaturated and branched-chain fatty acids RO:0002213

  Desaturase acting on membrane acyl chains rapidly increases unsaturated lipids (homeoviscous response).

  • DOI:10.1016/B978-0-12-809633-8.02282-2 the desaturase acting on the acyl chains of the membrane lipids comes into play, thereby increasing the amount of unsaturated lipid
• extracellular polymeric substances (EPS) protects against freeze-thaw cycles

  EPS surrounding cells acts as cryoprotectant against freeze-thaw damage.

  • DOI:10.37256/amtt.5220244537 exopolysaccharides (EPS) surrounding bacterial cells... providing protection against freeze-thaw cycles and acting as cryoprotectants
• trehalose contributes to facultative psychrophilic RO:0002326

  Trehalose protects bacteria against abiotic stress including low temperature.

  • DOI:10.1038/s41598-023-41323-x Trehalose... plays an important role in protecting bacteria against a range of stresses
• cold-shock proteins destabilizes RNA secondary structure

  CSPs act as chaperones destabilizing RNA secondary structures to maintain transcription/translation in cold.

  • DOI:10.1007/s42770-023-01057-4 CSPs function as chaperones that destabilize those secondary structures and maintain a single-stranded molecule
• compatible osmolytes contributes to facultative psychrophilic RO:0002326

  Accumulation of compatible osmolytes prevents cell shrinkage and water loss at sub-zero temperatures.

  • DOI:10.3389/fmicb.2023.1197797 Accumulation of compatible osmolytes (glycine betaine, trehalose, glycerol, sucrose, mannitol etc.)... to prevent cell shrinkage and water loss during sub-zero temperature