Protocol abstract
Nature Protocols 1, - 2485 - 2492 (2006)
Published online: 11 January 2007 | doi:10.1038/nprot.2006.401
Subject Categories: Chemical modification | Isolation, purification and separation | Spectroscopy and structural analysis | Synthetic chemistry
One-pot three-enzyme chemoenzymatic approach to the synthesis of sialosides containing natural and non-natural functionalities
Hai Yu1, Harshal A. Chokhawala1, Shengshu Huang1 & Xi Chen1
Abstract
Chemoenzymatic synthesis, which combines the flexibility of chemical synthesis and the high selectivity of enzymatic synthesis, is a powerful approach to obtain complex carbohydrates. It is a preferred method for synthesizing sialic acid-containing structures, including those with diverse naturally occurring and non-natural sialic acid forms, different sialyl linkages and different glycans that link to the sialic acid. Starting from N-acetylmannosamine, mannose or their chemically or enzymatically modified derivatives, sialic acid aldolase-catalyzed condensation reaction leads to the formation of sialic acids and their derivatives. These compounds are subsequently activated by a CMP-sialic acid synthetase and transferred to a wide range of suitable acceptors by a suitable sialyltransferase for the formation of sialosides containing natural and non-natural functionalities. The three-enzyme coupled synthesis of sialosides can be carried out in one pot without the isolation of intermediates. The time for synthesis is 4–18 h. Purification and characterization of the product can be completed within 2–3 d.
- Department of Chemistry, University of California-Davis, One Shields Avenue, Davis, California 95616, USA.
Correspondence to: Xi Chen1 e-mail: chen@chem.ucdavis.edu
nature-products
A-Z product listing
- 1-Propanol(Fisher)
- 95% Ethanol(Fisher)
- Acetic acid(Fisher)
- Bio-Gel P-2 gel, fine(Bio-Rad)
- Buchi rotary evaporator(Fisher)
- C25KC incubator shaker(Fisher)
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