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Information on EC 2.5.1.59 - protein geranylgeranyltransferase type I

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IUBMB Comments
This enzyme, along with protein farnesyltransferase (EC 2.5.1.58) and protein geranylgeranyltransferase type II (EC 2.5.1.60), constitutes the protein prenyltransferase family of enzymes. Catalyses the formation of a thioether linkage between the C-1 atom of the geranylgeranyl group and a cysteine residue fourth from the C-terminus of the protein. These protein acceptors have the C-terminal sequence CA1A2X, where the terminal residue, X, is preferably leucine; serine, methionine, alanine or glutamine makes the protein a substrate for EC 2.5.1.58. The enzymes are relaxed in specificity for A1, but cannot act if A2 is aromatic. Known targets of this enzyme include most gamma-subunits of heterotrimeric G proteins and Ras-related GTPases such as members of the Ras and Rac/Rho families. A zinc metalloenzyme. The Zn2+ is required for peptide, but not for isoprenoid, substrate binding.
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Word Map
The expected taxonomic range for this enzyme is: Eukaryota, Bacteria
Synonyms
ggtase-i, ggtase i, ggtase, geranylgeranyltransferase i, pggt-i, cdc43, protein geranylgeranyltransferase type i, geranylgeranyltransferase type i, protein geranylgeranyltransferase, geranylgeranyltransferase-i, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
geranylgeranyl diphosphate + protein-cysteine = S-geranylgeranyl-protein + diphosphate
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