Enables farnesyltranstransferase activity. Acts upstream of or within negative regulation of cell population proliferation; positive regulation of fibroblast proliferation; and wound healing. Predicted to be part of microtubule associated complex and protein farnesyltransferase complex. Orthologous to several human genes including CHURC1-FNTB (CHURC1-FNTB readthrough). [provided by Alliance of Genome Resources, Apr 2022]