478529-35-0Relevant academic research and scientific papers
Structure of the Complex between a Heparan Sulfate Octasaccharide and Mycobacterial Heparin-Binding Hemagglutinin
Huang, Teng-Yi,Irene, Deli,Zulueta, Medel Manuel L.,Tai, Tzu-Jui,Lain, Shih-Han,Cheng, Cheng-Po,Tsai, Ping-Xi,Lin, Shu-Yi,Chen, Zhi-Geng,Ku, Chiao-Chu,Hsiao, Chwan-Deng,Chyan, Chia-Lin,Hung, Shang-Cheng
supporting information, p. 4192 - 4196 (2017/04/04)
Heparin-binding hemagglutinin (HBHA) is a 199 amino acid virulence factor at the envelope of Mycobacterium tuberculosis that contributes to latent tuberculosis. The binding of HBHA to respiratory epithelial cells, which leads to extrapulmonary dissemination of the pathogen, is mediated by cell-surface heparan sulfate (HS). We report the structural characterization of the HBHA/HS complex by NMR spectroscopy. To develop a model for the molecular recognition, the first chemically synthesized uniformly 13C- and 15N-labeled HS octasaccharide and a uniformly 13C- and 15N-labeled form of HBHA were prepared. Residues 180–195 at the C-terminal region of HBHA show large chemical shift perturbation upon association with the octasaccharide. Molecular dynamics simulations conforming to the multidimensional NMR data revealed key electrostatic and even hydrophobic interactions between the binding partners that may aid in the development of agents targeting the binding event.
Solid-phase synthesis and 1H and 13C high-resolution magic angle spinning NMR of 13C-labeled resin-bound saccharides
Loening, Nikolaus M.,Kanemitsu, Takuya,Seeberger, Peter H.,Griffin, Robert G.
, p. 453 - 458 (2007/10/03)
We show how high-resolution magic angle-spinning NMR spectroscopy can be used to characterize 13C-labeled saccharides that have been prepared using solid-phase synthesis techniques while they are still bound to a solid-support resin. With the u
C2-hydroxyglycosylation with glycal donors. Probing the mechanism of sulfonium-mediated oxygen transfer to glycal enol ethers
Honda, Eiji,Gin, David Y.
, p. 7343 - 7352 (2007/10/03)
The C2-hydroxyglycosylation reaction employing the reagent combination of a diaryl sulfoxide and triflic anhydride offers a novel method for glycal assembly whereby a hydroxyl functionality is stereoselectively installed at the C2-position of a glycal donor with concomitant glycosylation of a nucleophilic acceptor. Mechanistic investigations into this reaction revealed a novel process for sulfonium-mediated oxidation of glycal enol ethers in which the sulfoxide oxygen atom is stereoselectively transferred to the C2-position of the glycal. 18O-labeling studies revealed that the S-to-C2 oxygen-transfer process involves initial formation of a C1-O linkage followed by O-migration to C2, leading to the generation of an intermediate glycosyl 1,2-anhydropyranoside that serves as an in situ glycosylating agent. These findings are consistent with the initial formation of a C2-sulfonium-C1-oxosulfonium pyranosyl species upon activation of the glycal donor with Aryl2SO·Tf2O.
