# Protein Ontology (PR)

> PRO provides an ontological representation of protein-related entities by explicitly defining...

- Page: https://library.schematica.io/model/7c87ed94a9ab462f9809afd14f6bcad7
- Model type: Ontology
- License: CC BY 4.0
- Access type: Free
- Access method: Download
- Model size: Huge
- Formats: OBO
- Domains: Healthcare
- External link: https://bioportal.bioontology.org/ontologies/PR
- Contact: Darren Natale (dan5@georgetown.edu)
- Listed in library: 2025-06-12
- Last updated: 2025-09-10

## Description

## Ontology Info

| Field | Value |
|-------|-------|
| Acronyme | PR |
| Description | PRO provides an ontological representation of protein-related entities by explicitly defining them and showing the relationships between them. Each PRO term represents a distinct class of entities (including specific modified forms, orthologous isoforms, and protein complexes) ranging from the taxon-neutral to the taxon-specific. The ontology has a meta-structure encompassing three areas: proteins based on evolutionary relatedness (ProEvo); protein forms produced from a given gene locus (ProForm); and protein-containing complexes (ProComp). |
| Format | OBO |
| Categories | All Organisms, Protein |
| Groups | OBO Foundry |

## Metrics

| Metric | Value |
|--------|-------|
| Classes | 364,396 |
| Individuals | 0 |
| Properties | 23 |
| Max Depth | 14 |
| Max Child Count | 102,299 |
| Average Child Count | 6 |
| Classes With One Child | 22,295 |
| Classes With More Than 25 Children | 265 |
| Classes With No Definition | 3,990 |

## Projects using PR

- [Beta Cell Genomics database](https://bioportal.bioontology.org/projects/BCGD)
- [Open PHACTS](https://bioportal.bioontology.org/projects/Open_PHACTS)
- [Blood Ontology](https://bioportal.bioontology.org/projects/Blood_Ontology)
- [Drug Repositioning](https://bioportal.bioontology.org/projects/DR)
- [Neuroscience Information Framework](https://bioportal.bioontology.org/projects/NIF)
- [ChEMBL-RDF](https://bioportal.bioontology.org/projects/ChEMBL-RDF)

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Source: https://library.schematica.io/model/7c87ed94a9ab462f9809afd14f6bcad7