The PRotein Ontology (PRO) has been designed to describe the relationships of proteins and protein evolutionary classes, to delineate the multiple protein forms of a gene locus (ontology for protein forms), and to interconnect existing ontologies.

Prefix
pr
Preferred Prefix
PR
Alternative Prefixes
PRO PR
Version
65.0
Links
Homepage Repository OBO OWL
Contact
Darren Natale   0000-0001-5809-9523   nataled
Pattern for Local Unique Identifiers

Local identifiers in Protein Ontology should match this regular expression:
^\d+$

Example Local Unique Identifier
000000024   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from Protein Ontology should match this regular expression:
^PR:\d+$

Example CURIE
PR:000000024
MIRIAM Namespace Embedded in LUI
The legacy MIRIAM standard for generating CURIEs with this resource includes the namespaceEmbeddedInLUI as true. The actual part that gets prefixed before the local unique identifier regex, otherwise known as the banana, is PR:. Therefore, you might see local unique identifiers written out as CURIEs.
References
Ontology
Metaregistry Protein Ontology

The metaregistry provides mappings between the Bioregistry and other registries. There are 14 mappings to external registries for pr with 4 unique external prefixes.

Registry Name Metaprefix External Prefix
AberOWL aberowl PR
AgroPortal agroportal PR
BioContext biocontext PR
BioPortal Prefixes bioportal PR
FAIRSharing FAIRSharing logo fairsharing FAIRsharing.4ndncv
Gene Ontology Registry go PR
Identifiers.org Identifiers.org logo miriam pr
Name-to-Thing Name-to-Thing logo n2t pr
OBO Foundry OBO Foundry logo obofoundry PR
Ontology Lookup Service Ontology Lookup Service logo ols pr
OntoBee ontobee PR
Prefix Commons prefixcommons pr
UniProt Cross-ref database uniprot PRO
Wikidata Property Wikidata Property logo wikidata P4926