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Bead Aggregation Assays for the Characterization of Putative Cell Adhesion Molecules

Bead Aggregation Assays for the Characterization of Putative Cell Adhesion Molecules

Published on: October 17, 2014

Specific N-glycans regulate an extracellular adhesion complex during somatosensory dendrite patterning.

Maisha Rahman^1,2, Nelson J Ramirez-Suarez¹, Carlos A Diaz-Balzac¹

¹Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA.

|May 19, 2022

Summary

Specific N-glycans regulate neuronal development by controlling an extracellular protein complex. This study reveals how distinct N-glycans on the DMA-1 receptor fine-tune dendrite patterning in C. elegans.

Keywords:

N-glycans adhesion alpha mannosidase II dendrite glycosylations

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Last Updated: Sep 22, 2025

Bead Aggregation Assays for the Characterization of Putative Cell Adhesion Molecules

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Published on: October 17, 2014

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

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Dendrimer-based Uneven Nanopatterns to Locally Control Surface Adhesiveness: A Method to Direct Chondrogenic Differentiation

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Published on: January 20, 2018

Area of Science:

Neuroscience
Glycobiology
Developmental Biology

Background:

N-glycans, diverse sugars on proteins, are crucial for protein function and implicated in developmental disorders.
Congenital disorders of glycosylation (CDGs) linked to N-glycosylation gene mutations often cause intellectual disability.

Purpose of the Study:

To investigate how distinct N-glycans regulate extracellular protein complexes involved in neuronal development.
To elucidate the role of Golgi alpha-mannosidase II (GMAN2) in N-glycan biosynthesis and its impact on somatosensory dendrite patterning.

Main Methods:

Utilized Caenorhabditis elegans as a model organism.
Investigated the function of GMAN2 (aman-2 gene) in N-glycan modification of the DMA-1 receptor.
Analyzed the Menorin adhesion complex formation and DMA-1 receptor activity.

Main Results:

Structurally distinct N-glycans, not protein stability or localization, regulate the Menorin adhesion complex activity.
AMAN-2 acts cell-autonomously to ensure proper N-glycan decoration (high-mannose/hybrid/paucimannose) on the DMA-1 receptor.
Specific N-glycans on particular sites of DMA-1 modulate its function within the Menorin complex.

Conclusions:

Specific N-glycan structures are critical regulators of dendrite patterning by coordinating extracellular adhesion complex activity.
The molecular diversity of N-glycans contributes to developmental specificity in the nervous system.