ISG15 transferase activity
Catalysis of the transfer of ISG15 from one protein to another via the reaction X-ISG15 + Y = Y-ISG15 + X, where both X-ISG15 and Y-ISG15 are covalent linkages.
GO:0019787
ubiquitin-like protein transferase activity
is_a
ISG15 conjugating enzyme activity
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