Methyl4,7,8,9-tetra-O-acetyl-2-thio-N-acetyl-a-D-neuraminic acidmethylester (CAS 116450-06-7)

Methyl 4,7,8,9-tetra-O-acetyl-2-thio-N-acetyl-α-D-neuraminic acid methyl ester is a chemically modified sialic acid derivative, which is extensively used in the field of glycobiology for studying the biological roles and chemical properties of sialic acids. This compound features a sulfur atom replacing an oxygen atom in the glycerol side chain of the sialic acid, a modification that significantly alters its chemical behavior and biological interactions. This modification is particularly important for probing the specificity and mechanism of sialidases (neuraminidases), enzymes that cleave sialic acids from glycoproteins and glycolipids. The thio-modification imparts a unique resistance to enzymatic cleavage, making it an excellent tool for studying enzyme inhibition and the structural requirements for substrate recognition by sialidases. Furthermore, the acetyl groups protect the molecule from nonspecific interactions and increase its lipophilicity, enhancing its suitability for studies involving membrane-associated proteins. Research involving this compound helps deepen our understanding of sialic acid metabolism, its role in cellular communication, and pathogen interaction. These studies contribute to foundational knowledge in microbial pathogenesis, cellular biology, and the development of diagnostic tools, highlighting the significance of this chemical in advancing scientific inquiry into complex biological systems.