Investigation of the Substrate‐Binding Site of a Prostaglandin E Synthase in Bombyx mori

Kohji Yamamoto, Aiko Hirowatari

Research output: Contribution to journalArticlepeer-review


Prostaglandin E synthase (PGES) catalyzes the conversion of prostaglandin H2 to prostaglandin E2 in the presence of glutathione (GSH) in mammals. Amid the limited knowledge on prostaglandin and its related enzymes in insects, we recently identified PGES from the silkworm Bombyx mori (bmPGES) and determined its crystal structure complexed with GSH. In the current study, we investigated the substrate-binding site of bmPGES by site-directed mutagenesis and X-ray crystallography. We found that the residues Tyr107, Val155, Met159, and Glu203 are located in the catalytic pockets of bmPGES, and mutagenesis of each residue reduced the bmPGES activity. Our results suggest that these four residues contribute to the catalytic activity of bmPGES. Overall, this structure-function study holds implications in controlling pests by designing rational and efficient pesticides.

Original languageEnglish
Pages (from-to)63-67
Number of pages5
JournalProtein Journal
Issue number1
Publication statusPublished - Feb 2021

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Bioengineering
  • Biochemistry
  • Organic Chemistry


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