Trans-pentaprenyltranstransferase

Thus, the two substrates of this enzyme are all-trans-pentaprenyl diphosphate and isopentenyl diphosphate, whereas its two products are diphosphate and all-trans-hexaprenyl diphosphate.

This enzyme belongs to the family of transferases, specifically those transferring aryl or alkyl groups other than methyl groups. The systematic name of this enzyme class is all-trans-pentaprenyl-diphosphate:isopentenyl-diphosphate pentaprenyltranstransferase. Other names in common use include all-trans-hexaprenyl-diphosphate synthase, hexaprenyl diphosphate synthase, and hexaprenyl pyrophosphate synthetase. This enzyme participates in biosynthesis of steroids.

References

Fujii H, Koyama T, Ogura K (1982). "Hexaprenyl pyrophosphate synthetase from Micrococcus luteus B-P 26 Separation of two essential components". J. Biol. Chem. 257 (24): 14610–2. PMID 7174655.

Transferases: alkyl and aryl (EC 2.5)

2.5.1	Dimethylallyltranstransferase Thiaminase I Methionine adenosyltransferase Riboflavin synthase Dihydropteroate synthase Spermidine synthase Glutathione S-transferase Farnesyl-diphosphate farnesyltransferase Spermine synthase Alkylglycerone phosphate synthase Farnesyltransferase Geranylgeranyltransferase type 1 Porphobilinogen deaminase

Enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list)

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