identifier: traitmech:000313 label: Aristaios system definition: A phage defense system in which an organism possesses an Aristaios locus that can restrict bacteriophage infection. definition_source: DOI:10.1093/nar/gkae671 trait_category: GENOMICS term_kind: CLASS mapping_status: PROPOSED parent_traits: - traitmech:000209 synonyms: - synonym_text: Aristaios synonym_type: EXACT_SYNONYM source: DOI:10.1093/nar/gkae671 evidence: - reference: DOI:10.1093/nar/gkae671 snippet: These systems were named after cheese, cattle or fermentation related deities (Rhea, Aristaios, Kamadhenu, Fliodhais, Audmula, Rugutis and Hesat) notes: Grafakou et al. named Aristaios among seven not previously described lactococcal antiphage systems. - reference: DOI:10.1128/aem.01120-24 snippet: Recently, three plasmid-encoded lactococcal antiphage systems, named Rhea, Aristaios, and Kamadhenu, were discovered. These systems were found to confer high levels of resistance against various Skunavirus members. notes: Grafakou et al. later characterized Aristaios as one of three plasmid-encoded lactococcal antiphage systems conferring strong resistance against Skunavirus members. - reference: https://raw.githubusercontent.com/mdmparis/defense-finder-models/afb0e5a8b466be53586b13266f5d38d98c3ac268/List_system_article.md snippet: Aristaios | 10\.1093/nar/gkae671 | Discovery of antiphage systems in the lactococcal plasmidome notes: The DefenseFinder article registry maps the named Aristaios system to the Grafakou et al. lactococcal antiphage-system discovery paper. causal_graphs: - graph_id: aristaios_locus_restricts_phage title: Aristaios loci confer bacterial phage defense description: Conservative system-level sketch linking possession of an Aristaios locus to restricted bacteriophage propagation without asserting the unresolved phage trigger or molecular output. scope_status: NONMECHANISTIC scope_notes: The graph captures Aristaios as a named lactococcal anti-phage system while leaving its direct phage trigger, molecular substrate, antiviral effector output, natural locus breadth, and the absence of pinned DefenseFinder HMM or rule rows unresolved. nodes: - node_id: aristaios_locus label: Aristaios locus node_type: GENETIC_ELEMENT description: An Aristaios anti-phage defense locus described among lactococcal plasmid-encoded phage-resistance systems. - node_id: restricted_phage_propagation label: restricted phage propagation node_type: BIOLOGICAL_PROCESS description: Reduced propagation of bacteriophage in cells carrying the Aristaios system. - node_id: aristaios_system_trait label: Aristaios system node_type: TRAIT grounding: traitmech:000313 description: Possession of a genome-encoded Aristaios phage-defense system. - node_id: phage_defense_system label: phage defense system node_type: TRAIT grounding: traitmech:000209 description: Possession of one or more genome-encoded immune systems that inhibit bacteriophage infection. edges: - subject: aristaios_locus predicate: contributes to predicate_id: RO:0002326 object: restricted_phage_propagation description: The lactococcal plasmidome screen discovered Aristaios as a named antiphage system, and the DefenseFinder article registry maps the Aristaios system to that discovery paper. evidence: - reference: DOI:10.1093/nar/gkae671 snippet: These systems were named after cheese, cattle or fermentation related deities (Rhea, Aristaios, Kamadhenu, Fliodhais, Audmula, Rugutis and Hesat) notes: Grafakou et al. named Aristaios as one of the novel lactococcal antiphage systems. - reference: DOI:10.1128/aem.01120-24 snippet: Recently, three plasmid-encoded lactococcal antiphage systems, named Rhea, Aristaios, and Kamadhenu, were discovered. These systems were found to confer high levels of resistance against various Skunavirus members. notes: Grafakou et al. later characterized Aristaios as one of three plasmid-encoded lactococcal antiphage systems conferring strong resistance against Skunavirus members. - reference: https://raw.githubusercontent.com/mdmparis/defense-finder-models/afb0e5a8b466be53586b13266f5d38d98c3ac268/List_system_article.md snippet: Aristaios | 10\.1093/nar/gkae671 | Discovery of antiphage systems in the lactococcal plasmidome notes: The DefenseFinder article registry maps the named Aristaios system to the Grafakou et al. lactococcal antiphage-system discovery paper. - subject: restricted_phage_propagation predicate: confers predicate_id: METPO:2007700 object: aristaios_system_trait description: Aristaios-mediated phage restriction realizes the Aristaios system trait. evidence: - reference: DOI:10.1093/nar/gkae671 snippet: These systems were named after cheese, cattle or fermentation related deities (Rhea, Aristaios, Kamadhenu, Fliodhais, Audmula, Rugutis and Hesat) notes: Grafakou et al. named Aristaios as one of the novel lactococcal antiphage systems. - reference: DOI:10.1128/aem.01120-24 snippet: Recently, three plasmid-encoded lactococcal antiphage systems, named Rhea, Aristaios, and Kamadhenu, were discovered. These systems were found to confer high levels of resistance against various Skunavirus members. notes: Grafakou et al. later characterized Aristaios as one of three plasmid-encoded lactococcal antiphage systems conferring strong resistance against Skunavirus members. - subject: aristaios_system_trait predicate: is a predicate_id: rdfs:subClassOf object: phage_defense_system description: Aristaios system possession is a phage-defense-system trait. evidence: - reference: https://raw.githubusercontent.com/mdmparis/defense-finder-models/afb0e5a8b466be53586b13266f5d38d98c3ac268/List_system_article.md snippet: Aristaios | 10\.1093/nar/gkae671 | Discovery of antiphage systems in the lactococcal plasmidome notes: The DefenseFinder article registry maps the named Aristaios system to the Grafakou et al. lactococcal antiphage-system discovery paper. discussions: - discussion_id: aristaios-mechanism-gap prompt: Resolve Aristaios phage triggers and effector outputs before minting narrower Aristaios mechanism children. kind: KNOWLEDGE_GAP status: OPEN rationale: Grafakou et al. and DefenseFinder support Aristaios as a named anti-phage system, but the direct trigger, molecular substrate, antiviral effector output, natural locus breadth, and profile-to-component model are not resolved enough here to assert a narrower mechanistic child trait. attaches_to: - causal_graphs#aristaios_locus_restricts_phage posed_by: codex posed_date: '2026-09-20' curation_history: - timestamp: '2026-09-20T15:55:54Z' curator: codex action: MINTED_TRAITMECH_ID changes: Minted Aristaios system as a DOI-backed GENOMICS TraitRecord under phage defense system after an ignored-and-hidden duplicate review found no exact live TraitMech, METPO, history, or prior proposal record; the replacement placeholder is reserved in proposals/metpo_traitmech_v190. llm_assisted: true