# Protein Modification Ontology (PSIMOD)

> PSI-MOD is an ontology consisting of terms that describe protein chemical modifications,...

- Page: https://library.schematica.io/model/66809ecec8e7498cb894ef360989b378
- Model type: Ontology
- License: CC BY 4.0
- Access type: Free
- Access method: Download
- Model size: Mid
- Formats: OBO
- Domains: Healthcare
- External link: https://bioportal.bioontology.org/ontologies/PSIMOD
- Contact: Sylvie Ricard-Blum (sylvie.ricard-blum@univ-lyon1.fr)
- Listed in library: 2025-06-12
- Last updated: 2025-09-10

## Description

## Ontology Info

| Field | Value |
|-------|-------|
| Acronyme | PSIMOD |
| Description | PSI-MOD is an ontology consisting of terms that describe protein chemical modifications, logically linked by an is_a relationship in such a way as to form a direct acyclic graph (DAG). The PSI-MOD ontology has more than 45 top-level nodes, and provides alternative hierarchical paths for classifying protein modifications either by the molecular structure of the modification, or by the amino acid residue that is modified. |
| Format | OBO |
| Categories |  |
| Groups | OBO Foundry, Proteomics Standards Initiative |

## Metrics

| Metric | Value |
|--------|-------|
| Classes | 2,098 |
| Individuals | 0 |
| Properties | 4 |
| Max Depth | 9 |
| Max Child Count | 118 |
| Average Child Count | 6 |
| Classes With One Child | 105 |
| Classes With More Than 25 Children | 29 |
| Classes With No Definition | 0 |

## Projects using PSIMOD

No projects using PSIMOD

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Source: https://library.schematica.io/model/66809ecec8e7498cb894ef360989b378