Abnormal protein N-linked glycosylation

What it means

An anomaly of protein N-linked glycosylation, i.e., an abnormality of the protein glycosylation process in which a carbohydrate or carbohydrate derivative unit is added to a protein via a nitrogen atom in an amino acid residue in a protein.

Essentially, all proteins (except albumin) that travel through the ER-Golgi network undergo N-linked glycosylation. Glycans promote protein folding, stability, trafficking, localisation, and oligomerisation. They play vital parts in cell-cell interactions and intracellular signaling.

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category