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Category:GO:0031386 ! protein tag
name: protein tag
namespace: molecular_function
def: "A molecular function exhibited by a protein that is covalently attached (AKA tagged or conjugated) to another protein where it acts as a marker, recognized by the cellular apparatus to target the tagged protein for some cellular process such as modification, sequestration, transport or degradation." [GOC:dos, GOC:go_curators, PMID:19028679, PMID:20054389, PMID:6305978]
comment: Use this term to annotate conjugated tags, not for conjugating enzymes. At the time of writing, all known gene products with this activity are ubiquitin-like, either based on overall sequence similarity or the presence of common motifs and structures.
subset: goslim_drosophila
subset: goslim_generic
subset: goslim_pir
subset: prokaryote_subset
synonym: "covalent modifier" RELATED [GOC:vw]
synonym: "protein tagging activity" RELATED []
synonym: "ubiquitin" RELATED []
synonym: "ubiquitin-like protein modifier" EXACT []
is_a: GO:0003674 ! molecular_function
AmiGO
<GOterm>GO:0031386</GOterm>
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