Investigation of the Substrate-Binding Site of a Prostaglandin E Synthase in Bombyx mori.
Protein J
; 40(1): 63-67, 2021 02.
Article
em En
| MEDLINE
| ID: mdl-33403608
ABSTRACT
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.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Bombyx
/
Dinoprostona
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Proteínas de Insetos
/
Prostaglandina-E Sintases
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Glutationa
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article