A protein modification process in which a polypeptide is added to a nascent polypeptide cotranslationally by trans-translation.
Comment:
Note that this term is not a child of 'co-translational protein modification process ; GO:0043686' because co-translational protein modification implies modification of a previously incorporated amino acid in a nascent chain, rather than addition of new sequence to the C-terminus.
Synonyms:
exact_synonym:
co-translational protein tagging; cotranslational protein tagging; protein modification by trans-translation