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EC 2.5.1.60 Details
EC number
2.5.1.60
Accepted name
protein geranylgeranyltransferase type II
Reaction
geranylgeranyl diphosphate + protein-cysteine = S-geranylgeranyl-protein + diphosphate
Other name(s)
GGTaseII, Rab geranylgeranyltransferase, RabGGTase, geranylgeranyl-diphosphate,geranylgeranyl-diphosphate:protein-cysteine geranyltransferase
Systematic name
geranylgeranyl-diphosphate:protein-cysteine geranyltransferase
CAS registry number
135371-29-8
Comment
This enzyme, along with protein farnesyltransferase (EC 2.5.1.58) and protein geranylgeranyltransferase type I (EC 2.5.1.59), constitutes the protein prenyltransferase family of enzymes. Attaches geranylgeranyl groups to two C-terminal cysteines in Ras-related GTPases of a single family, the Rab family (Ypt/Sec4 in lower eukaryotes) that terminate in XXCC, XCXC and CCXX motifs. Reaction is entirely dependent on the Rab substrate being bound to Rab escort protein (REP). Post-translational modification with the geranylgeranyl moiety is essential for Rab GTPases to be able to control the processes of membrane docking and fusion [5].
History
created 2003
EC Tree
2.5.1.12 created 1972, deleted 1976
2.5.1.13 created 1972, deleted 1976
2.5.1.14 created 1972, deleted 1976
2.5.1.37 created 1989, deleted 2004
2.5.1.40 created 1992, deleted 1999