protein methyltransferase activity lysine N-methyltransferase activity protein-lysine N-methyltransferase activity https://github.com/geneontology/go-ontology/issues/29483 Catalysis of the transfer of a methyl group from S-adenosyl-L-methionine to the epsilon-amino group of a lysine residue in a protein substrate. molecular_function RHEA:54192 Reactome:R-HSA-9844111 Reactome:R-HSA-8932221 Reactome:R-HSA-8932243 RHEA:55544 RHEA:51000 GO:0016279 Reactome:R-HSA-212263 protein lysine methylase activity Reactome:R-HSA-8931974 protein (lysine) methyltransferase activity Reactome:R-HSA-9854315 Reactome:R-HSA-8931858 RHEA:67108 Reactome:R-HSA-8932275 Reactome:R-HSA-8932276 Reactome:R-HSA-8865237 Reactome:R-HSA-8932413 RHEA:51736