129185-20-2Relevant academic research and scientific papers
Hydrolytic activity of α-galactosidases against deoxy derivatives of p- nitrophenyl α-D-galactopyranoside
Hakamata, Wataru,Nishio, Toshiyuki,Oku, Tadatake
, p. 107 - 115 (2007/10/03)
The four possible monodeoxy derivatives of p-nitrophenyl (PNP) α-D- galactopyranoside were synthesized, and hydrolytic activities of the α- galactosidase of green coffee bean, Mortierella vinacea and Aspergillus niger against them were elucidated. The 2- and 6-deoxy substrates were hydrolyzed by the enzymes from green coffee bean and M. vinacea, while they scarcely acted on the 3- and 4-deoxy compounds. On the other hand, A. niger α- galactosidase hydrolyzed only the 2-deoxy compound in these deoxy substrates, and the activity was very high. These results indicate that the presence of two hydroxyl groups (OH-3 and -4) is essential for the compounds to act as substrates for the enzymes of green coffee bean and M. vinacea, while the three hydroxyl groups (OH-3, -4, and -6) are necessary for the activity of the A. niger enzyme. The kinetic parameters (K(m) and V(max)) of the enzymes for the hydrolysis of PNP α-D-galactopyranoside and its deoxy derivatives were obtained from kinetic studies. (C) 2000 Elsevier Science Ltd.
Synthesis of methyl O-α-L-rhamnopyranosyl-(12)-α-D-galactopyranosides specifically deoxygenated at position 3, 4, or 6 of the galactose residue
Mulard, Laurence A.,Kovac, Pavol,Glaudemans, Cornelis P. J.
, p. 213 - 232 (2007/10/02)
The title disaccharides were synthesized by condensation of 2,3,4-tri-O-benzoyl-α-L-rhamnopyranosyl bromide with suitably protected, deoxygenated derivatives of methyl α-D-galactopyranoside.Deoxygenation was achieved via activation of a protected methyl α
Building Units of Oligosaccharides, CIII. - Synthesis of Modified Derivatives of the Disaccharide β-D-Gal-(1->3)-α-D-GalNAc for the Examination of Substrate Specifities of Core 2-β6-GlcNAc-Transferase and α-3-Sialyltransferase Involved in the Biosynthesis
Paulsen, Hans,Rutz, Volker,Brockhausen, Inka
, p. 747 - 758 (2007/10/02)
Derivatives of benzyl β-D-galactopyranosyl-(1->3)-2-acetamido-2-deoxy-α-D-galactopyranoside have been synthesized.The 6'-, 4'- and 3'-OH group of the galactose moiety as well as the 6- and 4-OH and the 2-acetamido group of the 2-acetamido-2-deoxy-D-galact
Synthesis of a series of methyl beta-glycosides of (1----6)-beta-D-galacto-oligosaccharides having one residue deoxygenated at position 3.
Kovac,Edgar
, p. 79 - 93 (2007/10/02)
Methyl beta-glycosides of beta-(1----6)-linked D-galactobioses (13 and 16) and -galactotrioses (21, 24, and 26) containing a 3-deoxy-beta-D-xylo-hexopyranosyl moiety either as one of the end units or the internal unit have been synthesized. The extension
