Anomeric Selectivity of Trehalose Transferase with Rare <scp>l</scp>-Sugars
作者:Luuk Mestrom、Stefan R. Marsden、Hessel van der Eijk、Jesper U. Laustsen、Cy M. Jeffries、Dmitri I. Svergun、Peter-Leon Hagedoorn、Isabel Bento、Ulf Hanefeld
DOI:10.1021/acscatal.0c02117
日期:2020.8.7
glycosyltransferases catalyze the formation of glycosidic bonds between nucleotide sugar donors and carbohydrate acceptors. The anomeric selectivity of trehalose transferase from Thermoproteus uzoniensis was investigated for both d- and l-glycopyranose acceptors. The enzyme couples a wide range of carbohydrates, yielding trehalose analogues with conversion and enantioselectivity of >98%. The anomeric selectivity inverts
Colchicine Glycorandomization Influences Cytotoxicity and Mechanism of Action
作者:Aqeel Ahmed、Noël R. Peters、Megan K. Fitzgerald、James A. Watson,、F. Michael Hoffmann、Jon S. Thorson
DOI:10.1021/ja064686s
日期:2006.11.1
The reaction of 70 unprotected, diversely functionalized free reducing sugars with methoxyamine-appended colchicine led to the production of a 58-member glycorandomized library. High-throughput cytotoxicity assays revealed glycosylation to modulate specificity and potency. Library members were also identified which, unlike the parent natural product (a destabilizer), stabilized in vitro tubulin polymerization in a manner similar to taxol. This study highlights a simple extension of neoglycorandomization toward amine-bearing scaffolds and the potential benefit of glycosylating nonglycosylated natural products.
A lipase inhibitor monoterpene and monoterpene glycosides from Monarda punctata
An 80% acetone extract of Monarda punctata showed an inhibitory effect on lipase activity in isolated mouse plasma in vitro and carvacrol was obtained as the active constituent. It had an IC50 value of 4.07 mM in vitro and suppressed elevations in blood triacylglycerol levels in olive oil-loaded mice. Furthermore, from the whole plant, 22 compounds were isolated. Six monoterpene glycosides (3-8), a flavone glucuronide (9), and other known compounds were identified based on the results of spectroscopic analyses. (C) 2010 Elsevier Ltd. All rights reserved.
FIANDOR, JOSE;GARCIA-LOPEZ, MARIA TERESA;DE, LAS HERAS FEDERICO G.;MENDEZ+, NUCLEOSIDES AND NUCLEOTIDES, 8,(1989) N, C. 257-271
作者:FIANDOR, JOSE、GARCIA-LOPEZ, MARIA TERESA、DE, LAS HERAS FEDERICO G.、MENDEZ+
DOI:——
日期:——
TATSUTA, KUNIAKI;NIWATA, YOSHIHISA;UMEZAWA, KAZUO;TOSHIMA, KAZUNOBU;NAKAT+, TETRAHEDRON LETT., 31,(1990) N, C. 1171-1172