ellipsoidal

METPO:1000673 · CLASS · REVIEWED

A cell shape in which an organism has an oval or ellipse morphology, elongated along one axis with rounded ends, intermediate between spherical and rod-shaped.

Ellipsoidal ovococcal elongation mechanism

Evidence-backed causal sketch linking ellipsoidal morphology to ovococcal peripheral peptidoglycan insertion, septal synthesis, PBP2b, and DivIVA-regulated elongation.

Ellipsoidal ovococcal elongation mechanism Interactive directed graph showing evidence-backed causal relationships for ellipsoidal.

Edge evidence

  • PBP2b promotes peripheral peptidoglycan RO:0002213

    PBP2b promotes peripheral wall synthesis in ovococcal elongation.

    • DOI:10.1089/mdr.2014.0032 PBP2b of ovococci Supports PBP2b as part of the ovococcal elongation system.
  • DivIVA regulates septal and peripheral peptidoglycan synthesis RO:0002211

    DivIVA regulates septal cleavage and peripheral peptidoglycan synthesis during ovococcal morphogenesis.

    • DOI:10.1128/mbio.01311-24 peripheral peptidoglycan synthesis Supports DivIVA control of ovococcal wall remodeling and elongation.
  • peripheral peptidoglycan contributes to ellipsoid geometry RO:0002326

    Peripheral wall insertion contributes to elongation of the ellipsoidal cell body.

    • DOI:10.1128/mbio.01311-24 septum cleavage and peripheral peptidoglycan synthesis Supports peripheral PG as a remodeling event for ovococcal elongation.
  • septal and peripheral peptidoglycan synthesis causes ellipsoid geometry biolink:causes

    Coordinated septal and peripheral synthesis shapes the ellipsoidal cell body.

    • DOI:10.1016/j.cub.2021.04.041 dynamics of peptidoglycan assembly Supports PG assembly dynamics in ovoid bacteria.
  • ellipsoid geometry manifests as ellipsoidal METPO:2007400

    Ellipsoid cell-body geometry manifests the ellipsoidal trait.

    • DOI:10.1089/mdr.2014.0032 ovococci that are ellipsoid Supports the morphology endpoint.
  • divisome (FtsZ/PBP2x/FtsW) carries out septal peptidoglycan synthesis

    The divisome (FtsZ/bPBP2x/FtsW) carries out septal PG synthesis.

    • DOI:10.1111/mmi.14659 an inner sPG machine (bPBP2x TP with FtsW GT)
  • elongasome (PBP2b/RodA) carries out peripheral peptidoglycan synthesis

    The elongasome (bPBP2b/RodA plus Rod complex) carries out peripheral PG synthesis.

    • DOI:10.1111/mmi.14659 an outer pPG machine (bPBP2b TP with RodA GT plus Rod complex proteins)
  • PBP2b required for peripheral peptidoglycan synthesis

    PBP2b is indispensable for lateral/peripheral PG synthesis and elongasome function.

    • DOI:10.1111/mmi.13543 PBP2b is identified as indispensable for lateral PG synthesis and is a key component of the elongasome
  • spatial separation of septal and peripheral PG rings enables combined septal and peripheral PG synthesis RO:0002327

    Spatial separation of inner sPG and outer pPG rings enables concurrent septal and peripheral synthesis underlying ellipsoidal shape.

    • DOI:10.1111/mmi.14659 septal and peripheral peptidoglycan synthesis are spatially separated at midcell into two concentric structures
  • undecaprenyl phosphate (Und-P) preferentially required for septal peptidoglycan synthesis

    Septal PG synthesis is more sensitive to Und-P limitation than peripheral synthesis, so Und-P limitation favors elongation.

    • DOI:10.7554/eLife.75607 septal peptidoglycan synthesis is more sensitive to reduced Und-P levels than peripheral peptidoglycan synthesis
  • combined septal and peripheral PG synthesis results in ellipsoidal

    Ovococcal/ellipsoidal shape results from combined use of septal and peripheral PG synthesis.

    • DOI:10.1038/nrmicro3088 Ovococcal cells, with an ellipsoid shape... ovococci use both septal and peripheral peptidoglycan synthesis

Provenance

Source
METPO (2025-11-25)
Author
Luke Wang
Definition source
DOI:10.1089/mdr.2014.0032

Parent traits (1)

kg-microbe context

Matched 1 kg-microbe node via direct_metpo.

  • METPO:1000673 [-1.999, -1.383, -2.615, +0.176, …]

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. · SEEDED_FROM_METPO · seed_from_metpo

    imported from data/raw/metpo.owl (CLASS)

  2. · CURATED_WITH_LITERATURE · codex

    Added DOI-backed definition and causal graph for PBP2b, DivIVA, peripheral peptidoglycan, coordinated septal/peripheral wall synthesis, and ellipsoid geometry.

  3. · GROUND_CAUSAL_PREDICATES · claude

    Grounded 2 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (RO:0002211×1, RO:0002326×1).

  4. · GROUND_CAUSAL_PREDICATES · claude

    Grounded 1 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (METPO:2007400×1).

  5. · RENAME_PREDICATE_LABELS · claude

    Renamed 1 causal-edge predicate label(s) to align with existing groundings: shapes → causes ×1.

  6. · GROUND_CAUSAL_PREDICATES · claude

    Grounded 1 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (biolink:causes×1).

  7. · GROUND_CAUSAL_NODES · claude

    Grounded 2 causal-node grounding field(s) via mappings/node_grounding.tsv (UniProtKB:A0A892RPK7×1, UniProtKB:Q1IYG2×1).

  8. · GROUND_CAUSAL_PREDICATES · claude

    Grounded 1 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (RO:0002213×1).

  9. · REMOVE_REDUNDANT_SYNONYM · claude

    Removed 1 synonym(s) whose text duplicated the label (seeder redundancy; no information lost).

  10. · ENRICH_CAUSAL_GRAPH · claude

    Added 6 evidence-backed generic edges (7 new nodes) from the deep-research report.

  11. · GROUND_CAUSAL_PREDICATES · claude

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