The UniProt Knowledgebase (UniProtKB) is a comprehensive resource for protein sequence and functional information with extensive cross-references to more than 120 external databases. Besides amino acid sequence and a description, it also provides taxonomic data and citation information.

Prefix
uniprot
Alternative Prefixes
SwissProt uniprot/swiss-prot UniProt Uniprot ID UP UniProtKB
Links
Homepage
Contact
Missing Contact
Pattern for Local Unique Identifiers

Local identifiers in UniProt Protein should match this regular expression:
^([A-N,R-Z][0-9]([A-Z][A-Z, 0-9][A-Z, 0-9][0-9]){1,2})|([O,P,Q][0-9][A-Z, 0-9][A-Z, 0-9][A-Z, 0-9][0-9])(\.\d+)?$

Example Local Unique Identifier
P0DP23   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from UniProt Protein should match this regular expression:
^uniprot:([A-N,R-Z][0-9]([A-Z][A-Z, 0-9][A-Z, 0-9][0-9]){1,2})|([O,P,Q][0-9][A-Z, 0-9][A-Z, 0-9][A-Z, 0-9][0-9])(\.\d+)?$

Example CURIE
uniprot:P0DP23
Publications
2006 The Universal Protein Resource (UniProt): an expanding universe of protein information.
Metaregistry UniProt Protein

The metaregistry provides mappings between the Bioregistry and other registries. There are 12 mappings to external registries for uniprot with 7 unique external prefixes.

Registry Name Metaprefix External Prefix
AberOWL aberowl UP
BioContext biocontext UniProtKB
Cellosaurus Registry cellosaurus UniProtKB
EDAM Ontology edam 3021
FAIRSharing FAIRSharing logo fairsharing FAIRsharing.wf28wm
Gene Ontology Registry go UniProtKB
Identifiers.org Identifiers.org logo miriam uniprot
Name-to-Thing Name-to-Thing logo n2t uniprot
National Center for Biotechnology Information Registry ncbi UniProt
Prefix Commons prefixcommons uniprot
Registry of Research Data Repositories re3data r3d100011521
Wikidata Property Wikidata Property logo wikidata P352