2-O-Methyl-β-D-N-acetylneuraminic Acid (CAS 23755-35-3)

2-O-Methyl-β-D-N-acetylneuraminic Acid (2-O-Me Neu5Ac) is a modified sialic acid derivative that plays a crucial role in various biological processes, particularly in cellular recognition and signaling. Sialic acids are terminal sugars found on glycoproteins and glycolipids, serving as important determinants of cell-cell interactions, immune responses, and pathogen recognition. 2-O-Me Neu5Ac is synthesized enzymatically by sialic acid O-acetyltransferase (SAT), which transfers an acetyl group to the C-9 hydroxyl group of N-acetylneuraminic acid (Neu5Ac), resulting in the formation of 2-O-Me Neu5Ac. This modification alters the structure and charge distribution of sialic acids, influencing their binding properties and recognition by sialic acid-binding proteins, such as lectins and viral hemagglutinins. In research, 2-O-Me Neu5Ac is utilized as a molecular probe to investigate sialic acid-dependent processes, including viral infections, immune modulation, and cancer metastasis. By studying the effects of 2-O-Me Neu5Ac on cell surface glycosylation patterns and interactions with sialic acid-binding proteins, scientists gain insights into the molecular mechanisms underlying various physiological and pathological conditions. Additionally, 2-O-Me Neu5Ac derivatives are employed as substrates for sialyltransferases and sialidases, enzymes involved in sialic acid biosynthesis and turnover, facilitating the study of glycan biosynthetic pathways and the development of novel glycoengineering strategies for various applications.