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2011
Dingle, Tanis C., Szpacenko, Adam, Ng, Kenneth K.S., Kitov, Pavel, Klassen, John S., El-Hawiet, Amr, Kitova,Elena N., Mulvey, George L., Eugenio, Luiz, Armstrong, Glen D.
The binding of recombinant fragments of the C-terminal cell-binding domains of the two large exotoxins, toxin A (TcdA) and toxin B (TcdB), expressed by Clostridium difficile and a library consisting of the most abundant neutral and acidic human milk oligosaccharides (HMOs) was examined...
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2011
El-Hawiet, Amr, Klassen, John S., Armstrong, Glen D., Dingle, Tanis C., Eugenio, Luiz, Mulvey, George L., Szpacenko, Adam, Ng, Kenneth K.S., Kitova,Elena N., Kitov, Pavel
The binding of recombinant fragments of the C-terminal cell-binding domains of the two large exotoxins, toxin A (TcdA) and toxin B (TcdB), expressed by Clostridium difficile and a library consisting of the most abundant neutral and acidic human milk oligosaccharides (HMOs) was examined...
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Construction of multivalent homo- and hetero-functional ABO blood group glycoconjugates using a trifunctional linker strategy
Download2017-12-12
Daskhan, Gour, Tran, Hanh-Thuc, Meloncelli, Peter J, Lowary, Todd L, West, Lori J, Cairo, Christopher W.
The design and synthesis of multivalent ligands displaying complex oligosaccharides is necessary for the development of therapeutics, diagnostics, and research tools. Here, we report an efficient conjugation strategy to prepare complex glycoconjugates with four copies of one or two separate...
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Human neuraminidase isoenzymes show variable activities for 9-O-acetyl-sialoside substrates
Download2018-01-16
Hunter, Carmanah D, Khanna, Neha, Richards, Michele R, Darestani, Reza Rezaei, Zou, Chunxia, Klassen, John S, Cairo, Christopher W.
Recognition of terminal sialic acids is central to many cellular processes, and structural modification of sialic acid can disrupt these interactions. A prominent, naturally occuring, modification of sialic acid is 9-O-acetylation (9-O-Ac). Study of this modification through generation and...
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2016-06-22
Jia, Feng, Howlader, Md. Amran, Cairo, Christopher W.
Integrins are critical receptors in cell migration and adhesion. A number of mechanisms are known to regulate the function of integrins, including phosphorylation, conformational change, and cytoskeletal anchoring. We investigated whether native neuraminidase (Neu, or sialidase) enzymes which...
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Localizing carbohydrate binding sites in proteins using hydrogen/deuterium exchange mass spectrometry
Download2016
Kitova, Elena N., Klassen, John S., Eugenio, Luiz, Li, Jun, Ng, Kenneth, Zhang, Jingjing
The application of hydrogen/deuterium exchange mass spectrometry (HDX-MS) to localize ligand binding sites in carbohydrate-binding proteins is described. Proteins from three bacterial toxins, the B subunit homopentamers of Cholera toxin and Shiga toxin type 1 and a fragment of Clostridium...
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Localizing carbohydrate binding sites in proteins using hydrogen/deuterium exchange mass spectrometry
Download2016
Klassen, John S., Kitova, Elena N., Li, Jun, Zhang, Jingjing, Ng, Kenneth, Eugenio, Luiz
The application of hydrogen/deuterium exchange mass spectrometry (HDX-MS) to localize ligand binding sites in carbohydrate-binding proteins is described. Proteins from three bacterial toxins, the B subunit homopentamers of Cholera toxin and Shiga toxin type 1 and a fragment of Clostridium...
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Molecular dynamics simulations of viral neuraminidase inhibitors with the human neuraminidase enzymes: Insights into isoenzyme selectivity
Download2018-05-16
Richards, Michele R, Guo, Tianlin, Hunter, Carmanah D, Cairo, Christopher W.
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...
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Protecting group-free immobilization of glycans for affinity chromatography using glycosylsulfonohydrazide donors
Download2015-09-16
Heranadez Armada, Daniel, Santos, Jobette T., Richards, Michele R., Cairo, Christopher W.
A variety of applications in glycobiology exploit affinity chromatography through the immobilization of glycans to a solid support. Although several strategies are known, they may provide certain advantages or disadvantages in how the sugar is attached to the affinity matrix. Additionally, the...
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Screening oligosaccharide libraries against lectins using the proxy protein electrospray ionization mass spectrometry assay
Download2016
Kitova, Elena N., Klassen, John S., Fan, Xuxin, Privé, Gilbert G., Cairo, Christopher W., Xiong, Zi Jian, Ng, Kenneth K. S., Zou, Chunxia, Eugenio, Luiz, Li, Jun
An electrospray ionization mass spectrometry (ESI-MS) assay for screening carbohydrate libraries against lectins is described. The assay is based on the proxy protein ESI-MS method, which combines direct ESI-MS protein–ligand binding measurements and competitive protein binding, to simultaneously...