NGlykane

N-glycans are a type of glycan that are covalently attached to proteins through an asparagine residue in the consensus sequence Asn-X-Ser/Thr, where X can be any amino acid except proline. This modification, known as N-glycosylation, is one of the most common post-translational modifications in eukaryotic cells. N-glycans play crucial roles in protein folding, stability, and function, as well as in cell-cell recognition and signaling processes. The biosynthesis of N-glycans begins in the endoplasmic reticulum with the formation of a precursor oligosaccharide, which is then transferred to proteins and further modified in the Golgi apparatus. These modifications can vary significantly between different organisms and cell types, resulting in a diverse array of N-glycan structures. Abnormal N-glycosylation is associated with various diseases, including congenital disorders of glycosylation and cancer, making N-glycans important biomarkers and therapeutic targets.