The UniProt Reference Clusters (UniRef) provide clustered sets of sequences from the UniProt Knowledgebase (including isoforms) and selected UniParc records in order to obtain complete coverage of the sequence space at several resolutions while hiding redundant sequences (but not their descriptions) from view.

Prefix
uniref
Links
Homepage
Contact
Missing Contact
Pattern for Local Unique Identifiers

Local identifiers in UniRef should match this regular expression:
^UniRef(100|90|50)_([OPQ][0-9][A-Z0-9]{3}[0-9]|[A-NR-Z][0-9]([A-Z][A-Z0-9]{2}[0-9]){1,2}|UPI[A-F0-9]{10})$

Example Local Unique Identifier
UniRef90_P00750   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from UniRef should match this regular expression:
^uniref:UniRef(100|90|50)_([OPQ][0-9][A-Z0-9]{3}[0-9]|[A-NR-Z][0-9]([A-Z][A-Z0-9]{2}[0-9]){1,2}|UPI[A-F0-9]{10})$

Example CURIE
uniref:UniRef90_P00750
Metaregistry UniRef

The metaregistry provides mappings between the Bioregistry and other registries. There are 3 mappings to external registries for this resource with 3 unique external prefixes.

Registry Name Registry Metaprefix External Prefix Curate
EDAM EDAM Ontology logo edam 2346
Identifiers.org Identifiers.org logo miriam uniref
re3data Registry of Research Data Repositories logo re3data r3d100011518
Providers

A provider turns a local unique identifiers from a resource into a URI. Many providers are also resolvable as URLs (i.e., they can be used in a web browser).

The local unique identifier UniRef90_P00750 is used to demonstrate the providers available for UniRef. A guide for curating additional providers can be found here.

Name Metaprefix URI
UniRef uniref https://www.uniprot.org/uniref/UniRef90_P00750
Bioregistry bioregistry https://bioregistry.io/uniref:UniRef90_P00750
Identifiers.org miriam https://identifiers.org/uniref:UniRef90_P00750