Substrate specificities of E- and Z-farnesyl diphosphate synthases with substrate analogs

Masahiko Nagaki, Takumi Ichijo, Rikiya Kobashi, Yusuke Yagihashi, Tohru Musashi, Jun Kawakami, Norimasa Ohya, Takeshi Gotoh, Hiroshi Sagami

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3 Citations (Scopus)

Abstract

Prenyltransferases catalyzes the basic isoprenoid chain elongation to produce prenyl diphosphates, which led to upward of 30,000 diverse isoprenoids as steroids, carotenoids, natural rubbers, and prenyl proteins. Here, we determined the reactivities of E- and Z-farnesyl diphosphate synthases (E- and Z-FPP synthases) isolated from Bacillus stearothermophilus and Thermobifida fusca, respectively. For this purpose we use the synthetic substrate analogs, 8-tetrahydropyran-2-yloxy-, 8-hydroxy- and 8-acetoxygeranyl diphosphates. Z-FPP synthase catalyzed the reaction between 8-hydroxygeranyl diphosphate (HOGPP) and isopentenyl diphosphate (IPP), which produced (2Z)-12-hydroxyfarnesyl diphosphate (yield: 16.7%) and (2Z, 6Z)-16-hydroxygeranylgeranyl diphosphate (yield: 6.6%). Neither E- nor Z-farnesyl diphosphate synthases detectably catalyzed reactions between 8-tetrahydropyran-2-yloxygeranyl diphosphate (8-THPOGPP) and IPP. However, a mutated E-FPP synthase (Y81S), did catalyze this reaction, producing 12-tetrahydropyran-2-yloxyfarnesyl diphosphate (12-THPOFPP) with a yield of 12.3%. Wild-type E-FPP synthase catalyzed the reaction of 8-acetoxygeranyl diphosphate (8-AcOGPP) with IPP, which produced 12-acetoxyfarnesyl diphosphate (12-AcOFPP) (yield, 21.8%). Mutant E-FPP synthase catalyzed the reaction between 8-AcOGPP with IPP, producing 12-AcOFPP and 16-acetoxygeranylgeranyl diphosphate (16-AcOGGPP) with respective yields of 55.3% and 1.7%. We believe our results contribute to a better understanding of the catalytic properties of these key enzymes and illustrate their use in the stereo-specific syntheses of compounds that may have significant biotechnological and medical applications.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalJournal of Molecular Catalysis B: Enzymatic
Volume80
DOIs
Publication statusPublished - 2012 Aug 1

Keywords

  • Acetoxygeranyl diphosphate
  • E-farnesyl diphosphate synthase
  • Hydroxygeranyl diphosphate
  • Substrate specificity
  • Tetrahydropyran-2-yloxygeranyl diphosphate
  • Z-farnesyl diphosphate synthase

ASJC Scopus subject areas

  • Catalysis
  • Bioengineering
  • Biochemistry
  • Process Chemistry and Technology

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    Nagaki, M., Ichijo, T., Kobashi, R., Yagihashi, Y., Musashi, T., Kawakami, J., Ohya, N., Gotoh, T., & Sagami, H. (2012). Substrate specificities of E- and Z-farnesyl diphosphate synthases with substrate analogs. Journal of Molecular Catalysis B: Enzymatic, 80, 1-6. https://doi.org/10.1016/j.molcatb.2012.04.006