GO:0097039

A protein ubiquitination process in which a linear polymer of ubiquitin, formed by the amino-terminal methionine (M1) of one ubiquitin molecule and by the carboxy-terminal glycine (G76) of the next, is added to a protein. [GOC:jsg, GOC:sp, PMID:21455173, PMID:21455180, PMID:21455181]