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2016

Richards, Michele R., Campuzano, Iain D. G., Kitova, Elena N., Klassen, John S., Li, Jun, Privé, Gilbert G., Xiong, Zi Jian, Bagal, Dhanashri

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...

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...

2018-01-16

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...

2015

Klassen, John S., Cairo, Christopher W.Xiong, Zi Jian, Li, Jun, Privé, Gilbert G., Leney, Aneika C., Kitova, Elena N., Darestani, Reza Rezaei, Zou, Chunxia, Nikjah, Sanaz

Protein interactions with glycolipids are implicated in diverse cellular processes. However, the study of protein–glycolipid complexes remains a significant experimental challenge. Here, we describe a powerful new assay that combines electrospray ionization mass spectrometry (ESI-MS) and...

2015

Klassen, John S., Darestani, Reza Rezaei, Kitova, Elena N., Zou, Chunxia, Li, Jun, Leney, Aneika C., Cairo, Christopher W.Xiong, Zi Jian, Privé, Gilbert G., Nikjah, Sanaz

Protein interactions with glycolipids are implicated in diverse cellular processes. However, the study of protein–glycolipid complexes remains a significant experimental challenge. Here, we describe a powerful new assay that combines electrospray ionization mass spectrometry (ESI-MS) and...

2016

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...

2016

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...

2018-11-16

Guo, Tianlin, Heon-Roberts, Rachel, Zou, Chunxia, Zheng, Ruixiang, Pshezhetsky, Alexey V, Cairo, Christopher W.

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...

2018-01-05

Guo, Tianlin, Datwyler, Philipp, Demina, Ekaterina, Richards, Michele R, Ge, Peng, Zou, Chunxia, Zheng, Ruixiang Blake, Fougerat, Anne, Pshezhetsky, Alexey V, Ernst, Beat, Cairo, Christopher W.

Human neuraminidases (NEU) are associated with human diseases including cancer, atherosclerosis, and diabetes. To obtain small molecule inhibitors as research tools for the study of their biological functions, we designed a library of 2-deoxy-2,3-didehydro-N-acetylneuraminic acid (DANA) analogues...

2014

Ng, Kenneth K. S., Tanha, Jamshid, Kitova, Elena N., Eugenio, Luiz, Murase, Tomohiko, Klassen, John S., Hussack, Greg, Schorr, Melissa

Clostridium difficile infection is a serious and highly prevalent nosocomial disease in which the two large, Rho-glucosylating toxins TcdA and TcdB are the main virulence factors. We report for the first time crystal structures revealing how neutralizing and non-neutralizing single-domain...