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2014 ; 4
(ä): 31
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Enzymatic synthesis of epothilone A glycosides
#MMPMID24949266
Parajuli P
; Pandey RP
; Koirala N
; Yoon YJ
; Kim BG
; Sohng JK
AMB Express
2014[]; 4
(ä): 31
PMID24949266
show ga
Epothilones are extremely cytotoxic chemotherapeutic agents with epoxide,
thiazole, and ketone groups that share equipotent kinetic similarity with taxol.
The in vitro glycosylation catalyzed by uridine diphosphate glucosyltransferase
(YjiC) from Bacillus licheniformis generated six novel epothilone A glycoside
analouges including epothilone A 7-O-?-D-glucoside, epothilone A
7-O-?-D-galactoside, epothilone A 3,7-O-?-D-digalactoside, epothilone A
7-O-?-D-2-deoxyglucoside, epothilone A 7-O-?-L-rhamnoside, and epothilone A
7-O-?-L-fucoside. Epothilone A 7-O-?-D-glucoside was structurally elucidated by
ultra-high performance liquid chromatography-photo diode array (UPLC-PDA)
conjugated with high resolution quantitative time-of-flight-electrospray
ionization mass spectroscopy (HR-QTOF ESI-MS/MS) supported by one-and
two-dimensional nuclear magnetic resonance studies whereas other epothilone A
glycosides were characterized by UPLC-PDA and HR-QTOF ESI-MS/MS analyses. The
time dependent conversion study of epothilone A to epothilone A 7-O-?-D-glucoside
found to be maximum (~26%) between 3 h to 5 h incubation.