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- 69Klassen, John S.
- 52Kitova, Elena N.
- 17Serpe, Michael J.
- 13Macauley, Matthew S.
- 12Liu, Lan
- 10El-Hawiet, Amr
- 20Electrospray ionization mass spectrometry
- 8Water electrolyzer
A Route to Polyprenol Pyrophosphate-Based Probes of O- Polysaccharide Biosynthesis in Klebsiella pneumoniae O2aDownload
An approach for the assembly of polyprenol pyrophosphate-based probes of O-polysaccharide biosynthesis in Klebsiella pneumoniae serotype O2a is described. This convergent route features high yielding, diastereoselective glycosylations and the late stage installation of the polyprenol...
Synthetic Polyprenol-Pyrophosphate Linked Oligosaccharides Are Efficient Substrates for Mycobacterial Galactan Biosynthetic EnzymesDownload
Mycobacteria, including the human pathogen Mycobacterium tuberculosis, produce a complex cell wall that is critical for their survival. The largest structural component of the cell wall, the mycolylarabinogalactanpeptidoglycan complex, has at its core a galactan domain composed of...
Chlorella viruses produce N-linked glycoproteins with carbohydrate moieties that differ in structure from all other N- linked glycans. In addition, unlike most viruses, these organisms do not hijack the biosynthetic machinery of the host to make glycocoproteins; instead, they produce their own...
A route for the synthesis of glycuronamides via the intermediacy of 6-S-tolyl-glycosides and uronic acid thioesters, is reported. The route, which is compatible with a variety of carbohydrate residues and protecting groups, was used to synthesize the repeating unit of the E. coli K54 capsular...
Synthesis of a homologous series of galactofuranose-containing mycobacterial arabinogalactan fragmentsDownload
Mycobacteria, including the human pathogen Mycobacterium tuberculosis the causative agent of tuberculosis, produce a complex cell wall structure made of carbohydrates and lipids. The major structural element of the mycobacterial cell wall is a glycoconjugate called the mycolic...
A Convergent Route to Enantiomers of the Bicyclic Monosaccharide Bradyrhizose Leads to Insight into the Bioactivity of an Immunologically Silent LipopolysaccharideDownload
The synthesis of bradyrhizose, the monosaccharide component of the lipopolysaccharide O-antigen of the nitrogen-fixing bacteria Bradyrhizobium sp. BTAi1 and sp. ORS278, has been achieved in 25 steps in an overall yield of 6% using myo-inositol and ethyl propiolate as the starting materials. The...
Synthesis of the Campylobacter jejuni 81-176 strain capsular polysaccharide repeating unit reveals the absolute configuration of its O-methyl phosphoramidate motifDownload
The O-methyl phosphoramidate (MeOPN) motif is a non-stoichiometric modification of capsular polysaccharides (CPS) in ~70% of all Campylobacter jejuni strains. Infections by C. jejuni lead to food-borne illnesses and the CPS they produce are key virulence factors. The MeOPN phosphorus atom in...
It has been well established that mutations in K-Ras and N-Ras proto-oncogenes can convert them into active oncogenes. Current molecular cancer research has been focused on determining the key steps by which cellular genes become oncogenes and not on the underlying and fundamental chemical damage...
Selective inhibitors of human neuraminidase 1 (NEU1)
Inhibitors of human neuraminidase enzymes (NEU) are recognized as important tools for the study of the biological functions of NEU and will be potent tools for elucidating the role of these enzymes in regulating the repertoire of cellular glycans. Here we report the discovery of selective...
Molecular dynamics simulations of viral neuraminidase inhibitors with the human neuraminidase enzymes: Insights into isoenzyme selectivity
Molecular dynamics simulations of viral neuraminidase inhibitors with the human neuraminidase enzymes: Insights into isoenzyme selectivityDownload
Inhibitors of viral neuraminidase enzymes have been previously developed as therapeutics. Humans can express multiple forms of neuraminidase enzymes (NEU1, NEU2, NEU3, NEU4) that share a similar active site and enzymatic mechanism with their viral counterparts. Using a panel of purified human...