NaCl range mid2

Edge evidence

• robust osmoadaptive tolerance produces NaCl range mid2 METPO:2000202

  Robust osmoadaptive tolerance yields a 3–8% NaCl growth range.

  • DOI:10.1093/femsre/fuy009 moderate halophile Supports the 3–8% range as the moderate-halophile outcome.
• NaCl range mid2 is a NaCl range rdfs:subClassOf

  NaCl range mid2 is a quantitative bin of the NaCl-range phenotype.

  • DOI:10.1093/femsre/fuy009 salinity range Supports the 3–8% range as a value within the NaCl-range distribution.
• ectABC operon enables biosynthesis of ectoine

  The ectABC operon encodes the conserved ectoine biosynthesis pathway.

  • DOI:10.3389/fmicb.2023.1192059 ectoine biosynthesis relies on ectABC; repeatedly supported across taxa.
• ectoine positively contributes to NaCl range mid2

  Ectoine accumulation supports sustained growth/tolerance at 6-8% NaCl.

  • DOI:10.1186/s12934-024-02358-5 Within tolerable range (1-8% NaCl shock) ectoine rapidly becomes the dominant osmoprotectant.
• Na+ and K+ ion uptake rapidly balances osmotic pressure balance

  Uptake of Na+ and K+ ions rapidly balances osmotic pressure after NaCl upshift.

  • DOI:10.1186/s12934-024-02358-5 Cells urgently balanced surging osmotic pressure by uptaking sodium and potassium ions.
• osmotic pressure balance contributes to robust osmoadaptive tolerance RO:0002326

  Balancing osmotic pressure underpins robust osmoadaptive tolerance.

  • DOI:10.1186/s12934-024-02358-5 Rapid ion-flux osmotic balancing is part of the osmoadaptive response sustaining growth.
• intracellular glutamate/glutamine pools provides early osmotic buffering for robust osmoadaptive tolerance

  Increased glutamate/glutamine pools provide early osmotic buffering during NaCl shock.

  • DOI:10.1186/s12934-024-02358-5 Augmenting intracellular amino acid pools, particularly glutamate and glutamine, buffers early osmotic stress.
• BetA/BetB pathway enables biosynthesis of glycine betaine

  BetA and BetB convert choline to glycine betaine, a compatible solute.

  • DOI:10.3389/fmicb.2023.1192059 Choline to glycine betaine via BetA and BetB; conserved across moderate halophiles.
• glycine betaine positively contributes to robust osmoadaptive tolerance

  Glycine betaine acts as a compatible solute supporting osmoadaptive tolerance.

  • DOI:10.3389/fmicb.2023.1192059 Glycine betaine biosynthesis/uptake supports compatible-solute-based osmoadaptation.