Search
Skip to Search Results- 20Electrospray ionization mass spectrometry
- 12Affinity
- 11Complexes
- 10Carbohydrates
- 7Affinities
- 6Binding
-
2015
Boraston, Alisdair, B., Kitova, Elena N., Klassen, John S., Tan, Ming, Pluvinage, Benjamin, Han, Ling, Jiang, Xi
The binding profiles of many human noroviruses (huNoVs) for human histo-blood group antigens have been characterized. However, quantitative-binding data for these important virus–host interactions are lacking. Here, we report on the intrinsic (per binding site) affinities of HBGA oligosaccharides...
-
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...
-
2014
Kitova, Elena N., Klassen, John S., Michelsen, Klaus, Liu, Lan, Schnier, Paul D., Baergen, Alyson
This work explores the energetics of intermolecular H-bonds inside a hydrophobic protein cavity. Kinetic measurements were performed on the gaseous deprotonated ions (at the −7 charge state) of complexes of bovine β-lactoglobulin (Lg) and three monohydroxylated analogs of palmitic acid (PA):...
-
Mapping protein-ligand interactions in the gas phase using a functional group replacement strategy: Comparison of CID and BIRD activation methods
Download2013
Klassen, John S., Kitova, Elena N., Deng, Lu
Intermolecular interactions in the gaseous ions of two protein–ligand complexes, a single chain antibody (scFv) and its trisaccharide ligand (α-D-Galp-(1→2)-[α-D-Abep-(1→3)]-α-Manp-OCH3, L1) and streptavidin homotetramer (S4) and biotin (B), were investigated using a collision-induced...
-
2012
Klassen, John S., Lin, Hong, Kitova, Elena N., Ng, Kenneth K., Johnson, M. A., Eugenio, Luiz
Electrospray ionization mass spectrometry (ESI-MS) measurements were performed under a variety of solution conditions on a highly acidic sub-fragment (B3C) of the C-terminal carbohydrate-binding repeat region of Clostridium difficile toxin B, and two mutants (B4A and B4B) containing fewer acidic...
-
Nonspecific interactions between proteins and charged biomolecules in electrospray ionization mass spectrometry
Download2010
Kitova, Elena N., Sun, Nian, Klassen, John S., Soya, Naoto
An investigation of the nonspecific association of small charged biomolecules and proteins in electrospray ionization mass spectrometry (ES-MS) is described. Aqueous solutions containing pairs of proteins and a small acidic or basic biomolecule that does not interact specifically with either of...
-
Quantifying labile protein-ligand interactions using electrospray ionization mass spectrometry
Download2010
El-Hawiet, Amr, Klassen, John S., Kitova, Elena N., Liu, Lan
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...
-
Quantifying protein-fatty acid interactions using electrospray ionization mass spectrometry
Download2011
Liu, Lan, Kitova, Elena N., Klassen, John S.
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),...
-
Thermal dissociation of streptavidin homotetramer in the gas phase: Subunit loss versus backbone fragmentation
Download2013
Deng, Lu, Klassen, John S., Kitova, Elena N., Sinelnikov, Igor
The results of time-resolved blackbody infrared radiative dissociation experiments performed on gaseous protonated ions, at charge states +15, +16 and +17, of the homotetramer streptavidin (S4) are reported. Evidence is found for three dissociation pathways involving (i) the loss of a single...
-
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...