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Information on EC 2.5.1.42 - geranylgeranylglycerol-phosphate geranylgeranyltransferase

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IUBMB Comments
This enzyme is an integral-membrane protein that carries out the second prenyltransfer reaction involved in the formation of polar membrane lipids in Archaea. Requires a divalent metal cation, such as Mg2+ or Mn2+, for activity . 4-Hydroxybenzoate, 1,4-dihydroxy 2-naphthoate, homogentisate and alpha-glycerophosphate cannot act as prenyl-acceptor substrates . The other enzymes involved in the biosynthesis of polar lipids in Archaea are EC 1.1.1.261 (sn-glycerol-1-phosphate dehydrogenase), EC 2.5.1.41 (phosphoglycerol geranylgeranyltransferase), which, together with this enzyme, alkylates the hydroxy groups of glycerol 1-phosphate to yield unsaturated archaetidic acid, which is acted upon by EC 2.7.7.67 [CDP-2,3-bis-(O-geranylgeranyl)-sn-glycerol synthase] to form CDP-unsaturated archaeol. The final step in the pathway involves the addition of L-serine, with concomitant removal of CMP, leading to the production of unsaturated archaetidylserine . Belongs in the UbiA prenyltransferase family .
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Word Map
The enzyme appears in viruses and cellular organisms
Synonyms
(s)-2,3-di-o-geranylgeranylglyceryl phosphate synthase, dgggps, dgggp synthase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
geranylgeranyl diphosphate + 3-(O-geranylgeranyl)-sn-glycerol 1-phosphate = diphosphate + 2,3-bis-(O-geranylgeranyl)-sn-glycerol 1-phosphate
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