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- 12Affinity
- 11Complexes
- 10Carbohydrates
- 7Affinities
- 6Binding
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Screening carbohydrate libraries for protein interactions using the direct ESI-MS assay: Applications to libraries of unknown concentration
Download2014
El-Hawiet, Amr, Klassen, John S., Kitova, Elena N.
A semiquantitative electrospray ionization mass spectrometry (ESI-MS) binding assay suitable for analyzing mixtures of oligosaccharides, at unknown concentrations, for interactions with target proteins is described. The assay relies on the differences in the ratio of the relative abundances of...
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Quantifying protein-fatty acid interactions using electrospray ionization mass spectrometry
Download2011
Klassen, John S., Kitova, Elena N., Liu, Lan
The application of the direct electrospray ionization mass spectrometry (ESI-MS) assay to quantify interactions between bovine β-lactoglobulin (Lg) and a series of fatty acids (FA), CH3(CH2)xCOOH, where x = 6 (caprylic acid, CpA), 8 (capric acid, CA), 10 (lauric acid, LA), 12 (myristic acid, MA),...
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2016
Klassen, John S., Campuzano, Iain D. G., Bagal, Dhanashri, Privé, Gilbert G., Kitova, Elena N., Xiong, Zi Jian, Richards, Michele R., Li, Jun
Saposin A (SapA) lipoprotein discs, also known as picodiscs (PDs), represent an attractive method to solubilize glycolipids for protein interaction studies in aqueous solution. Recent electrospray ionization mass spectrometry (ESI-MS) data suggest that the size and composition of...
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P. aeruginosa SGNH hydrolase-like proteins AlgJ and AlgX have similar topology but separate and distinct roles in alginate acetylation
Download2014
Howell, P. Lynne, Klassen, John S., Robinson, Howard, Kitova, Elena N., Dawson, Karen, Clarke, Anthony J., Little, Dustin J., Walvoort, Marthe T., Weadge, Joel T., Codee, Jeroen D. C., Baker, Perrin, Whitney, John C., Ohman, Dennis E., Ricer, Tyler, Moynihan, Patrick J.
The O-acetylation of polysaccharides is a common modification used by pathogenic organisms to protect against external forces. Pseudomonas aeruginosa secretes the anionic, O-acetylated exopolysaccharide alginate during chronic infection in the lungs of cystic fibrosis patients to form the major...
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2016
Klassen, John S., Yao, Yuyu, Kitova, Elena N., Richards, Michele R.
The results of an investigation into the influence of sulfolane, a commonly used supercharging agent, on electrospray ionization mass spectrometry (ESI-MS) measurements of protein–ligand affinities are described. Binding measurements carried out on four protein–carbohydrate complexes, lysozyme...
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2014
Klassen, John S., Ng, Simon, Liu, Lan, Bailey, Justin, Derda, Ratmir, Baergen, Alyson, Jalili, Nobar
This paper reports on the first experimental study of the energies of noncovalent fluorine bonding in a protein-ligand complex in the absence of solvent. Arrhenius parameters were measured for the dissociation of gaseous deprotonated ions of complexes of bovine β-lactoglobulin (Lg), a model...
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Screening oligosaccharide libraries against lectins using the proxy protein electrospray ionization mass spectrometry assay
Download2016
Privé, Gilbert G., Ng, Kenneth K. S., Xiong, Zi Jian, Klassen, John S., Kitova, Elena N., Fan, Xuxin, Li, Jun, Zou, Chunxia, Eugenio, Luiz, Cairo, Christopher W.
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...
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Screening carbohydrate libraries for protein interactions using the direct ESI-MS assay: Applications to libraries of unknown concentration
Download2014
El-Hawiet, Amr, Klassen, John S., Kitova, Elena N.
A semiquantitative electrospray ionization mass spectrometry (ESI-MS) binding assay suitable for analyzing mixtures of oligosaccharides, at unknown concentrations, for interactions with target proteins is described. The assay relies on the differences in the ratio of the relative abundances of...
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Quantifying labile protein-ligand interactions using electrospray ionization mass spectrometry
Download2010
El-Hawiet, Amr, Liu, Lan, Klassen, John S., Kitova, Elena N.
A new electrospray ionization mass spectrometry (ES-MS) approach for quantifying protein—ligand complexes that are prone to in-source (gas-phase) dissociation is described. The method, referred to here as the reference ligand ES-MS method, is based on the direct ES-MS assay and competitive ligand...
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2015
El-Hawiet, Amr, Klassen, John S., N. Kitova, Elena N.
The affinities of the most abundant oligosaccharides found in human milk for four bacterial exotoxins (from Vibrio cholerae and pathogenic Escherichia coli) were quantified for the first time. Association constants (Ka) for a library of 20 human milk oligosaccharides (HMOs) binding to Shiga toxin...