EOG86HJRG GO:0018342 27/91 protein prenylation biological_process "The covalent attachment of a prenyl group to a protein; geranyl, farnesyl, or geranylgeranyl groups may be added." [GOC:di, ISBN:0198506732] EOG86HJRG GO:0008318 24/91 protein prenyltransferase activity molecular_function "Catalysis of the covalent addition of an isoprenoid group such as a farnesyl or geranylgeranyl group via thioether linkages to a cysteine residue in a protein." [GOC:mah] EOG86HJRG GO:0004660 3/91 protein farnesyltransferase activity molecular_function "Catalysis of the reaction: farnesyl diphosphate + protein-cysteine = S-farnesyl protein + diphosphate." [EC:2.5.1.58, PMID:8621375] EOG86HJRG GO:0004662 1/91 CAAX-protein geranylgeranyltransferase activity molecular_function "Catalysis of the reaction: geranylgeranyl diphosphate + protein-cysteine = S-geranylgeranyl-protein + diphosphate. This reaction is the formation of a thioether linkage between the C-1 atom of the geranylgeranyl group and a cysteine residue fourth from the C-terminus of the protein. The protein substrates have the C-terminal sequence CA1A2X, where the terminal residue, X, is preferably leucine and A2 should not be aromatic. Known substrates include most g-subunits of heterotrimeric G proteins and Ras-related GTPases such as members of the Ras and Rac/Rho families." [EC:2.5.1.59, PMID:8621375]