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Reading and Writing the Human Glycocode.

Noortje de Haan1,2, Mathias I Nielsen3, Hans H Wandall2

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Summary

Understanding human glycosylation requires studying the context of glycans, the carbohydrate structures on proteins and lipids. This review explores glycosyltransferases and glycan-binding proteins to decode glycan functions in health and disease.

Keywords:
genetic glycan engineeringglycan analysisglycan binding proteinsglycomicsglycoproteinsglycosyltransferases

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Area of Science:

  • Biochemistry
  • Glycobiology
  • Human Physiology

Background:

  • Complex carbohydrates, or glycans, decorate human proteins and lipids, playing vital roles in cell recognition, immune responses, and signaling.
  • The structural and functional characterization of the human glycome is crucial for basic research and developing new therapies and biotechnologies.

Purpose of the Study:

  • To review glycosyltransferases (glycan writers) and glycan-binding proteins (glycan readers) involved in human glycome function.
  • To emphasize the importance of context, including carrier proteins, cell types, and subcellular locations, in understanding specific glycosylation functions.
  • To promote a systematic approach for identifying the roles of glycosylation in human physiology.

Main Methods:

  • Review of scientific literature on glycosyltransferases and glycan-binding proteins.
  • Analysis of the contextual factors influencing glycan function.
  • Synthesis of current knowledge on the human glycome.

Main Results:

  • Glycosyltransferases build the glycome, while glycan-binding proteins interpret glycan functions.
  • Glycan function is highly context-dependent, varying with carrier proteins, cell types, and subcellular locations.
  • A contextual understanding is essential for unlocking the full potential of glycomics.

Conclusions:

  • Studying the glycome within specific biological contexts is critical for a deeper understanding of human physiology.
  • This approach will facilitate the systematic identification of glycosylation roles.
  • Enhanced understanding of the glycome supports advancements in diagnostics, therapeutics, and biotechnology.