pfam01239: PPTA (this model, PSSM-Id:279565 is obsolete and has been replaced by 460128)
Protein prenyltransferase alpha subunit repeat
Both farnesyltransferase (FT) and geranylgeranyltransferase 1 (GGT1) recognize a CaaX motif on their substrates where 'a' stands for preferably aliphatic residues, whereas GGT2 recognizes a completely different motif. Important substrates for FT include, amongst others, many members of the Ras superfamily. GGT1 substrates include some of the other small GTPases and GGT2 substrates include the Rab family.