Recent progress in the synthesis of glycosphingolipids

Area of Science:

• Carbohydrate Chemistry
• Glycobiology
• Organic Synthesis

Background:

• Glycosphingolipids (GSLs) play crucial roles in various biological processes.
• Understanding GSL functions requires access to structurally defined compounds.
• Demand for efficient GSL synthesis methods is increasing.

Purpose of the Study:

• To review recent developments in chemical and chemoenzymatic synthesis of GSLs.
• To showcase strategies for producing structurally defined GSLs and gangliosides.
• To facilitate biological studies and applications of GSLs.

Main Methods:

• Chemical synthesis approaches including glucosyl ceramide cassette, late-stage sialylation, and diversity-oriented strategies.
• Chemoenzymatic synthesis utilizing multi-step one-pot multi-enzyme methods and enzymatic sialylation.
• Use of key substrates like water-soluble lactosyl ceramide for complex GSL synthesis.

Main Results:

• Successful synthesis of terpioside B, fluorescent sialyl lactotetraosyl ceramide, and lacto-ganglio-series GSL analogs via chemical routes.
• Efficient synthesis of ganglioside GM1 using a one-pot multi-enzyme approach.
• Total synthesis of complex ganglioside LLG-5 enabled by enzymatic sialylation of a water-soluble precursor.

Conclusions:

• Recent chemical and chemoenzymatic strategies significantly advance GSL synthesis.
• These methods provide access to diverse and complex GSL structures.
• Improved GSL production will accelerate research into their biological functions and applications.