Structure–Activity Relationship of Fluorinated Sialic Acid Inhibitors for Bacterial Sialylation
作者:Sam J. Moons、Emiel Rossing、Jurriaan J. A. Heming、Mathilde A. C. H. Janssen、Monique van Scherpenzeel、Dirk J. Lefeber、Marien I. de Jonge、Jeroen D. Langereis、Thomas J. Boltje
DOI:10.1021/acs.bioconjchem.1c00194
日期:2021.6.16
presenting host-derived sialicacids. Herein, we report a detailed structure–activity relationship of sialic acid-based inhibitors that prevent the transfer of host sialicacids to NTHi. We report the synthesis and biological evaluation of C-5, C-8, and C-9 derivatives of the parent compound 3-fluorosialic acid (SiaNFAc). Small modifications are tolerated at the C-5 and C-9 positions, while the C-8
para-Nitrophenol-tagged sialyl galactosides containing sialic acid derivatives in which the C5 hydroxyl group of sialic acids was systematically substituted with a hydrogen, a fluorine, a methoxyl or an azido group were successfully synthesized using an efficient chemoenzymatic approach. These compounds were used as valuable probes in high-throughput screening assays to study the importance of the C5 hydroxyl group of sialic acid in the recognition and the cleavage of sialoside substrates by bacterial sialidases.
diverse GM3 gangliosides containing various sialic acid forms and different fatty acyl chains in low cost, an improved process was developed to chemically synthesize lactosyl sphingosine from an inexpensive l-serine derivative. It was then used to obtain GM3 sphingosines from diverse modified sialic acid precursors by an efficient one-pot multienzyme sialylation system containing Pasteurella multocida
An N-terminal and C-terminal truncated recombinant α2–6-sialyltransferase cloned from Photobacterium sp. JH-ISH-224, Psp2,6ST(15–501)-His6, was shown to be an efficient catalyst for one-pot three-enzyme synthesis of sialyl Tn (STn) antigens and derivatives containing natural and non-natural sialic acid forms.
从发光杆菌属克隆的 N 端和 C 端截短的重组 α2-6-唾液酸转移酶。 JH-ISH-224, Psp2,6ST(15–501)-His6,被证明是一锅三酶合成唾液酸 Tn (STn) 抗原和含有天然和非天然唾液酸形式的衍生物的有效催化剂。
Chemoenzymatic Total Synthesis of <i>Haemophilus ducreyi</i> Lipooligosaccharide Core Octasaccharides Containing Natural and Unnatural Sialic Acids
the challenging α-(1 → 5)-linked Hep–Kdo glycosidic bond by gold-catalyzed glycosylation with a glycosyl ortho-alkynylbenzoate donor. Furthermore, the sequential enzyme-catalyzed regio- and stereoselective introduction of a galactose residue using β-1,4-galactosyltransferase and different sialic acids using a one-pot multienzyme sialylation system was efficiently accomplished to provide the target octasaccharides