Catalysis of the reaction: farnesyl diphosphate + protein-cysteine = S-farnesyl protein + diphosphate.
Source:EC:2.5.1.58,
PMID:8621375
Comment
The catalyzed reaction transfers a farnesyl group from farnesyl diphosphate to a target protein. There is no relationship between this activity and farnesyltransferase activity, GO:0004311, where the catalyzed reaction forms (free) geranylgeranyl diphosphate.