UniProt functional annotation for Q12051

UniProt code: Q12051.

Organism: Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast).
Taxonomy: Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes; Saccharomycetales; Saccharomycetaceae; Saccharomyces.
 
Function: Catalyzes the trans-addition of the 3 molecules of IPP onto DMAPP to form geranylgeranyl pyrophosphate. Required for the membrane attachment of YPT1 and SEC4. May be involved in vesicle trafficking and protein sorting. {ECO:0000269|PubMed:15296494, ECO:0000269|PubMed:7665600}.
 
Catalytic activity: Reaction=dimethylallyl diphosphate + isopentenyl diphosphate = (2E)- geranyl diphosphate + diphosphate; Xref=Rhea:RHEA:22408, ChEBI:CHEBI:33019, ChEBI:CHEBI:57623, ChEBI:CHEBI:58057, ChEBI:CHEBI:128769; EC=2.5.1.1;
Catalytic activity: Reaction=(2E)-geranyl diphosphate + isopentenyl diphosphate = (2E,6E)- farnesyl diphosphate + diphosphate; Xref=Rhea:RHEA:19361, ChEBI:CHEBI:33019, ChEBI:CHEBI:58057, ChEBI:CHEBI:128769, ChEBI:CHEBI:175763; EC=2.5.1.10;
Catalytic activity: Reaction=(2E,6E)-farnesyl diphosphate + isopentenyl diphosphate = (2E,6E,10E)-geranylgeranyl diphosphate + diphosphate; Xref=Rhea:RHEA:17653, ChEBI:CHEBI:33019, ChEBI:CHEBI:58756, ChEBI:CHEBI:128769, ChEBI:CHEBI:175763; EC=2.5.1.29;
Cofactor: Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000269|PubMed:17535895}; Note=Binds 2 Mg(2+) ions per subunit. {ECO:0000269|PubMed:17535895};
Biophysicochemical properties: Kinetic parameters: KM=3.2 uM for farnesyl diphosphate; KM=0.8 uM for isopentenyl diphosphate;
Pathway: Isoprenoid biosynthesis; farnesyl diphosphate biosynthesis; farnesyl diphosphate from geranyl diphosphate and isopentenyl diphosphate: step 1/1.
Pathway: Isoprenoid biosynthesis; geranyl diphosphate biosynthesis; geranyl diphosphate from dimethylallyl diphosphate and isopentenyl diphosphate: step 1/1.
Pathway: Isoprenoid biosynthesis; geranylgeranyl diphosphate biosynthesis; geranylgeranyl diphosphate from farnesyl diphosphate and isopentenyl diphosphate: step 1/1.
Subcellular location: Cytoplasm {ECO:0000250}.
Miscellaneous: Present with 2840 molecules/cell in log phase SD medium. {ECO:0000269|PubMed:14562106}.
Similarity: Belongs to the FPP/GGPP synthase family. {ECO:0000305}.

Annotations taken from UniProtKB at the EBI.