3-Deoxy-D-glycero-D-galacto-2-nonulosonic acid
IUPAC 名称
(4S,5R,6R,7R,8S)-4,5,6,7,8,9-hexahydroxy-2-oxononanoic acid
描述
3-Deoxy-D-glycero-D-galacto-2-nonulosonic acid (KDN) is a sialic acid (Sia) that is ubiquitously expressed in vertebrates during normal development and tumorigenesis. Its expression is thought to be regulated by multiple biosynthetic steps catalyzed by several enzymes, including CMP-Sia synthetase. (PMID 11479279) Sialic acids are frequently the terminal sugars on secreted and cell surface glycoproteins and glycolipids, and their presence can have considerable influence on the biological properties of a cell. For example, the temporal appearance and disappearance of polysialic polymers has been intimately linked with the proper development of neural tissues during embryogenesis. In pathogenic diseases, including meningitis and gastric inflammation, particular microbes recognize cell surface sialic acids when invading host cells. Sialic acid residues can also mask recognition sites such as galactose residues on glycoproteins to prevent their in vivo removal by asialoglycoprotein receptors. In certain cancers, changes in sialic acid amounts, types, and linkages have been associated with tumorogenesis and cancer metastasis. (PMID 10749855) [HMDB]
异构
OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)[C@@H](O)CC(=O)C(O)=O
InChI标识符
InChI=1S/C9H16O9/c10-2-5(13)7(15)8(16)6(14)3(11)1-4(12)9(17)18/h3,5-8,10-11,13-16H,1-2H2,(H,17,18)/t3-,5-,6+,7+,8+/m0/s1
键
FQHUAUMYHAJTDH-IMSDGWMTSA-N