Role of Glycans on Key Cell Surface Receptors That Regulate Cell Proliferation and Cell Death

Area of Science:

• Biochemistry
• Cell Biology
• Molecular Biology

Background:

• Cell surface receptors mediate critical cellular processes like proliferation, apoptosis, migration, and differentiation.
• Most cell surface receptors are heavily glycosylated, suggesting a significant role for glycans in their function.

Purpose of the Study:

• To review the roles of receptor glycosylation in cell surface receptor function.
• To discuss the impact of N-glycans and O-glycans on diverse receptor types and cellular processes.

Main Methods:

• Literature review focusing on glycosylation of growth factor receptors (tyrosine kinase and serine/threonine kinase domains) and cell-death-inducing receptors.
• Analysis of the known functions of glycans on receptor conformation, ligand binding, oligomerization, and signaling.

Main Results:

• Glycans play diverse roles in receptor function, including structural and signaling aspects.
• N- and O-glycans influence receptor conformation, ligand binding affinity, and receptor oligomerization.
• Glycosylation is critical for the activation of downstream signaling cascades.

Conclusions:

• Understanding receptor glycosylation is key to deciphering receptor function.
• Targeting glycosylation pathways offers potential therapeutic strategies for diseases involving aberrant cell survival and death, such as cancer and immune disorders.