Single-chain antibody-fragment M6P-1 possesses a mannose 6-phosphate monosaccharide-specific binding pocket that distinguishesN-glycan phosphorylation in a branch-specific manner
An expedient synthesis of benzyl 2,3,4-tri-O-benzyl-β-d-glucopyranoside and benzyl 2,3,4-tri-O-benzyl-β-d-mannopyranoside
摘要:
An efficient three-step synthesis of benzyl 2,3,4-tri-O-benzyl-beta-D-glucopyranoside, a widely used building block in carbohydrate chemistry, is described. The key step is the selective debenzylation-acetylation of perbenzylated beta-glucose using ZnCl2-Ac2O-HOAc. This approach was also used to affect an efficient three-step synthesis of benzyl 2,3,4-tri-O-benzyl-beta-D-mannopyranoside. (c) 2005 Elsevier Ltd. All rights reserved.
An approach to the synthesis of α-l-fucopyranosyl phosphoric mono- and diesters via phosphite intermediates
作者:P. Westerduin、G.H. Veeneman、J.E. Marugg、G.A. van der Marel、J.H. van Boom
DOI:10.1016/s0040-4039(00)84219-7
日期:1986.1
The reagent chloro-β-cyanoethyl-N,N-diisopropylamino-phosphoramidite reacts smoothly with the anomeric hydroxyl group of a properly protected (benzyl) α-L-fucopyranose to afford a relatively stable phosphite intermediate in high yield. The latter can easily be converted into valuable α-L-fucopyranosyl phosphoric mono- and diesters.
Sweet Battle of the Epimers─Continued Exploration of Monosaccharide-Derived Delivery Agents for Boron Neutron Capture Therapy
作者:Jelena Matović、Katayun Bahrami、Philipp Stockmann、Iris K. Sokka、You Cheng Khng、Mirkka Sarparanta、Evamarie Hey-Hawkins、Jarkko Rautio、Filip S. Ekholm
DOI:10.1021/acs.molpharmaceut.3c00119
日期:2023.6.5
Boron neutron capture therapy (BNCT) is a cancer therapy in which boron deliveryagents play a crucial role. In theory, deliveryagents with high tumor targeting capabilities can lead to selective eradication of tumor cells without causing harmful side effects. We have been working on a GLUT1-targeting strategy to BNCT for a number of years and found multiple promising hit compounds which outperform
An expedient synthesis of benzyl 2,3,4-tri-O-benzyl-β-d-glucopyranoside and benzyl 2,3,4-tri-O-benzyl-β-d-mannopyranoside
作者:Wallach Lu、Latifeh Navidpour、Scott D. Taylor
DOI:10.1016/j.carres.2005.02.013
日期:2005.5
An efficient three-step synthesis of benzyl 2,3,4-tri-O-benzyl-beta-D-glucopyranoside, a widely used building block in carbohydrate chemistry, is described. The key step is the selective debenzylation-acetylation of perbenzylated beta-glucose using ZnCl2-Ac2O-HOAc. This approach was also used to affect an efficient three-step synthesis of benzyl 2,3,4-tri-O-benzyl-beta-D-mannopyranoside. (c) 2005 Elsevier Ltd. All rights reserved.
Single-chain antibody-fragment M6P-1 possesses a mannose 6-phosphate monosaccharide-specific binding pocket that distinguishes<i>N</i>-glycan phosphorylation in a branch-specific manner
作者:Ryan J Blackler、Dylan W Evans、David F Smith、Richard D Cummings、Cory L Brooks、Thomas Braulke、Xinyu Liu、Stephen V Evans、Sven Müller-Loennies
DOI:10.1093/glycob/cwv093
日期:2016.2
The acquisition of mannose 6-phosphate (Man6P) on N-linked glycans of lysosomal enzymes is a structural requirement for their transport from the Golgi apparatus to lysosomes mediated by the mannose 6-phosphate receptors, 300 kDa cation-independent mannose 6-phosphate receptor (MPR300) and 46 kDa cation-dependent mannose 6-phosphate receptor (MPR46). Here we report that the single-chain variable domain (scFv) M6P-1 is a unique antibody fragment with specificity for Man6P monosaccharide that, through an array-screening approach against a number of phosphorylated N-glycans, is shown to bind mono- and diphosphorylated Man6 and Man7 glycans that contain terminal αMan6P(1 → 2)αMan(1 → 3)αMan. In contrast to MPR300, scFv M6P-1 does not bind phosphodiesters, monophosphorylated Man8 or mono- or diphosphorylated Man9 structures. Single crystal X-ray diffraction analysis to 2.7 Å resolution of Fv M6P-1 in complex with Man6P reveals that specificity and affinity is achieved via multiple hydrogen bonds to the mannose ring and two salt bridges to the phosphate moiety. In common with both MPRs, loss of binding was observed for scFv M6P-1 at pH values below the second pKa of Man6P (pKa = 6.1). The structures of Fv M6P-1 and the MPRs suggest that the change of the ionization state of Man6P is the main driving force for the loss of binding at acidic lysosomal pH (e.g. lysosome pH ∼ 4.6), which provides justification for the evolution of a lysosomal enzyme transport pathway based on Man6P recognition.