Synergistic Inhibition of Human α-1,3-Fucosyltransferase V
摘要:
Human alpha-1,3-fucosyltransferase V (FucT V), which catalyzes the transfer of L-fucose moiety from guanosine diphosphate beta-L-fucose (GDP-Fuc) to an acceptor sugar To form sialyl Lewis x (sLe(x)), was shown to proceed through an ordered, sequential mechanism by product inhibition studies. The designed azatrisaccharide propyl 2-acetamido-2-deoxy-4-O-(beta-D-galactopyranosyl)-3 -O-(2-(N-(beta-L-homofuconojirimycinyl))ethyl)-alpha-D- glucopyranoside (2), prepared by covalently linking the N-group of beta-L-homofuconojirimycin (1) to the 3-OH of LacNAc through an ethylene unit, in the presence of GDP was found to be an effective inhibitor of FucT V. In the presence of 30 mu M GDP, the concentration of 2 necessary to cause 50% inhibition was reduced 77-fold to 31 mu M. Presumably, the azatrisaccharide and GDP form a complex which mimics the transition state of the enzymatic reaction. Given the low affinity of FucT V for its substrate LacNAc (K-m = 35 mM), the designed azatrisaccharide in the presence of GDP represents the most potent synergistic inhibitor complex reported so far.
598. The synthesis of long-chain aliphatic acids from acetylenic compounds. Part V. The synthesis of trans-cis-herculin
作者:R. A. Raphael、Franz Sondheimer
DOI:10.1039/jr9510002693
日期:——
MANGENEY, P.;ALEXAKIS, A.;NORMANT, J. F., TETRAHEDRON LETT., 28,(1987) N 21, 2363-2366
作者:MANGENEY, P.、ALEXAKIS, A.、NORMANT, J. F.
DOI:——
日期:——
Acetals as chiral auxillaries Part 4 (1)
作者:P. Mangeney、A. Alexakis、J.F. Normant
DOI:10.1016/s0040-4039(00)96125-2
日期:——
Alkenyl copper - BF3 reagents, associated with tributylphosphine, react stereoselectivity with chiral α,β-ethylenic acetals. A precursor of the CaliforniaRedscalepheromone has been prepared.
Synergistic Inhibition of Human α-1,3-Fucosyltransferase V
作者:Lei Qiao、Brion W. Murray、Makoto Shimazaki、Jody Schultz、Chi-Huey Wong
DOI:10.1021/ja960274f
日期:1996.1.1
Human alpha-1,3-fucosyltransferase V (FucT V), which catalyzes the transfer of L-fucose moiety from guanosine diphosphate beta-L-fucose (GDP-Fuc) to an acceptor sugar To form sialyl Lewis x (sLe(x)), was shown to proceed through an ordered, sequential mechanism by product inhibition studies. The designed azatrisaccharide propyl 2-acetamido-2-deoxy-4-O-(beta-D-galactopyranosyl)-3 -O-(2-(N-(beta-L-homofuconojirimycinyl))ethyl)-alpha-D- glucopyranoside (2), prepared by covalently linking the N-group of beta-L-homofuconojirimycin (1) to the 3-OH of LacNAc through an ethylene unit, in the presence of GDP was found to be an effective inhibitor of FucT V. In the presence of 30 mu M GDP, the concentration of 2 necessary to cause 50% inhibition was reduced 77-fold to 31 mu M. Presumably, the azatrisaccharide and GDP form a complex which mimics the transition state of the enzymatic reaction. Given the low affinity of FucT V for its substrate LacNAc (K-m = 35 mM), the designed azatrisaccharide in the presence of GDP represents the most potent synergistic inhibitor complex reported so far.