Galactose-beta-1,4-xylose
IUPAC 名称
(2R,3R,4S,5R,6S)-2-(hydroxymethyl)-6-{[(3R,4R,5R,6R)-4,5,6-trihydroxyoxan-3-yl]oxy}oxane-3,4,5-triol
描述
Galactose-beta-1,4-xylose is a disaccharide and a likely degradation product from glycosaminoglycans (GAGs) such as heparin sulfate and condroitin sulfate. GAGs are a major component of proteoglycans, which typically consist of a core protein and negatively charged GAGs. Proteoglycans are widely expressed on the cell surface and in the extracellular matrix of various tissues and play important roles in the control of growth and differentiation. The biosynthesis of GAG is initiated by the formation of the linkage tetrasaccharide structure, GlcA1,3Gal1, 3Gal1,4Xyl1-O-Ser, which is common to heparin sulfate, dermatan sulfate and condroitin sulfate. In humans proteoglycan 1,4-galactosyltransferase I (Beta 1,4-galactosyltransferase 7) (B4GalTI) transfers galactose to protein-linked xylose to form galactose-beta-1,4-xylose, which is the disaccharide unit from which the last two galactosyl and glucuronosyl units of the tetrasaccharide unit are attached via transferases. [HMDB]
异构
OC[C@H]1O[C@@H](O[C@@H]2CO[C@@H](O)[C@H](O)[C@H]2O)[C@H](O)[C@@H](O)[C@H]1O
InChI标识符
InChI=1S/C11H20O10/c12-1-3-5(13)7(15)9(17)11(20-3)21-4-2-19-10(18)8(16)6(4)14/h3-18H,1-2H2/t3-,4-,5+,6+,7+,8-,9-,10-,11+/m1/s1
键
VCTBNHVCBSUQPG-YOUNRWHRSA-N