TraitMech

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obligately piezophilic

traitmech:000002 · CLASS · REVIEWED

A pressure growth preference in which an organism requires elevated hydrostatic pressure for growth and is unable to grow at atmospheric pressure (0.1 MPa).

Obligate piezophily: growth requires elevated hydrostatic pressure

Evidence-backed causal sketch linking obligate HHP adaptation to inability to grow at atmospheric pressure.

Obligate piezophily: growth requires elevated hydrostatic pressure Interactive directed graph showing evidence-backed causal relationships for obligately piezophilic.

Edge evidence

  • obligate high hydrostatic pressure causes obligately piezophilic biolink:causes

    HHP adaptation that no longer functions at 0.1 MPa makes high pressure obligatory for growth.

    • DOI:10.1099/ijsem.0.001671 Colwellia marinimaniae MTCD1 has a growth range of 80-140 MPa (optimum 120 MPa) and does not grow at atmospheric pressure.
  • pressure-dependent cellular machinery enables obligately piezophilic RO:0002327

    Cellular machinery requiring HHP for function realizes the obligate-piezophile phenotype.

    • DOI:10.1038/srep27289 Pyrococcus yayanosii is an obligate piezophile requiring HHP for growth.
  • obligately piezophilic has characteristic inability to grow at ambient pressure (0.1 MPa)

    The obligate-piezophile phenotype is defined by inability to grow at ambient pressure (0.1 MPa).

    • DOI:10.1038/s41396-021-00930-0 Obligate piezophiles (or hyperpiezophiles) are unable to grow at ambient pressure (0.1 MPa).
  • obligate high hydrostatic pressure increases amount of unsaturated/branched-chain membrane lipids

    Elevated hydrostatic pressure increases the requirement for and abundance of unsaturated/branched-chain membrane lipids.

    • DOI:10.3389/fmolb.2022.1058381 The abundance of specific membrane lipids, such as those containing unsaturated and branched-chain fatty acids, rises with increasing HHP across marine piezophiles.
  • unsaturated/branched-chain membrane lipids enables maintenance of membrane fluidity under HHP RO:0002327

    Unsaturated/branched-chain lipids maintain membrane fluidity under HHP (homeoviscous adaptation).

    • DOI:10.3389/fmolb.2022.1058381 Membrane lipid adaptation (unsaturated/branched fatty acids) is a homeoviscous response maintaining membrane fluidity under high hydrostatic pressure.
  • maintenance of membrane fluidity under HHP contributes to pressure-dependent cellular machinery RO:0002326

    Maintained membrane fluidity supports the pressure-dependent cellular machinery underlying obligate piezophily.

    • DOI:10.3389/fmolb.2022.1058381 Membrane fluidity maintenance via lipid adaptation underlies the pressure-adapted membrane systems of piezophiles.

Provenance

Source
METPO (2025-11-25)
Definition source
DOI:10.1038/srep27289

Parent traits (1)

Synonyms (1)

  • obligate piezophile EXACT_SYNONYM · DOI:10.1038/srep27289

kg-microbe context

Matched 1 kg-microbe node via parent_proxy.

  • METPO:1000059 [-2.682, -2.070, -3.656, -0.652, …]

512-dim DeepWalkSkipGramEnsmallen embedding from kg-microbe (2026-04-25).

Nearest neighbors in embedding space

Top-8 cosine-similar METPO traits from the 2026-04-25 deepwalk (512-D).

Curation history

  1. · PROPOSED_FROM_RESEARCH · claude

    Proposed candidate ENVIRONMENT trait (obligate high-pressure requirement) from literature research; sub-variant of piezophilic. Backed by two obligate- piezophile organism examples.

  2. · CURATED_CAUSAL_GRAPH · claude

    Added evidence-backed causal graph (obligate HHP requirement) with RO/biolink predicate groundings; promoted PROPOSED to REVIEWED.

  3. · ENRICH_CAUSAL_GRAPH · claude

    Added 4 evidence-backed generic edges (3 new nodes) from the deep-research report.

  4. · GROUND_CAUSAL_PREDICATES · claude

    Grounded 2 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (RO:0002327×1, RO:0002326×1).