Substrate
Conformation Correlates with the Outcome
of Hyoscyamine 6β-Hydroxylase Catalyzed Oxidation Reactions
Richiro Ushimaru
Mark W. Ruszczycky
Wei-chen Chang
Feng Yan
Yung-nan Liu
Hung-wen Liu
10.1021/jacs.8b03729.s001
https://acs.figshare.com/articles/journal_contribution/Substrate_Conformation_Correlates_with_the_Outcome_of_Hyoscyamine_6_-Hydroxylase_Catalyzed_Oxidation_Reactions/6480557
Hyoscyamine 6β-hydroxylase
(H6H) is an α-ketoglutarate
dependent mononuclear nonheme iron enzyme that catalyzes C6-hydroxylation
of hyoscyamine and oxidative cyclization of the resulting product
to give the oxirane natural product scopolamine. Herein, the chemistry
of H6H is investigated using hyoscyamine derivatives with modifications
at the C6 or C7 position as well as substrate analogues possessing
a 9-azabicyclo[3.3.1]nonane core. Results indicate that hydroxyl rebound
is unlikely to take place during the cyclization reaction and that
the hydroxylase versus oxidative cyclase activity of H6H is correlated
with the presence of an <i>exo</i>-hydroxy group having <i>syn</i>-periplanar geometry with respect to the adjacent H atom
to be abstracted.
2018-06-05 00:00:00
oxidative cyclase activity
cyclization
Substrate Conformation Correlates
catalyzes C 6-hydroxylation
H 6H
C 7 position
nonheme iron enzyme
Hyoscyamine 6β- Hydroxylase Catalyzed Oxidation Reactions Hyoscyamine 6β- hydroxylase
hyoscyamine