. "\"Catalysis of the reaction: 2 geranylgeranyl diphosphate + protein-cysteine = 2 S-geranylgeranyl-protein + 2 diphosphate. This reaction is the formation of two thioether linkages between the C-1 atom of the geranylgeranyl groups and two cysteine residues within the terminal sequence motifs XXCC, XCXC or CCXX. Known substrates include Ras-related GTPases of a single family and the Rab family.\" [EC:2.5.1.60, GOC:mah, PMID:8621375]" . . "Rab geranylgeranyltransferase activity" . "Rab-protein geranylgeranyltransferase activity" . "geranylgeranyl-diphosphate,geranylgeranyl-diphosphate:protein-cysteine geranyltransferase activity" . "GGTase-II activity" . "GGTaseII activity" . "protein geranylgeranyltransferase type II activity" . "RabGGTase activity" . "type II protein geranyl-geranyltransferase activity" . "MetaCyc:2.5.1.60-RXN" . "MetaCyc:RXN-3701" . "EC:2.5.1.60" . .