CMP-beta-D-N-Acetylneuraminic Acid, Sodium

CMP-Neu5Ac is a modified form of N-acetylneuraminic acid (sialic acid) where it is linked to the nucleotide cytidine-5'-monophosphate (CMP). In vertebrates, it is synthesized in the nucleus through the enzymatic action of CMP-sialic acid synthetases, using CTP and Neu5Ac as precursors. Sialyltransferases are responsible for transferring Neu5Ac from CMP-sialic acid to various acceptor substrates, typically located at the terminal positions of the oligosaccharide component of glycoproteins or glycolipids. The presence of sialic acid-containing glycans on the cell surface plays a critical role in cell interactions and contributes to processes such as infection, inflammation, and cancer.