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Biomedical Engineering and Bioengineering Commons™
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Full-Text Articles in Biomedical Engineering and Bioengineering
Engineered Switch Protein Inspired By Novel Protein Affinity Transition Mode, Liang Fang
Engineered Switch Protein Inspired By Novel Protein Affinity Transition Mode, Liang Fang
Doctoral Dissertations
Many natural proteins involved in complex biological processes such as ligand binding and protein folding demonstrate multiple, allosterically-regulated conformational states, with protein activity regulated by effector molecules. The alpha L integrin and its inserted domain (I domain) is one example of such a protein. The binding of the effector molecule such as talin or filamin to the cytoplasmic domain of the integrin increases the binding affinity between I- domain and its ligand intercellular adhesion molecule-1, known as ICAM-1.There are multiple models attempting to describe the mechanism responsible for the change in binding affinity. According to research conducted by our lab, …
Studies On Protein Solubility, Ke Li
Studies On Protein Solubility, Ke Li
Doctoral Dissertations
"Solubility is a critical factor of protein-based drugs during processing and patient administration. This study focused on two aspects of solubility: one was the poly (ethylene) glycol (PEG) precipitation of monoclonal antibodies (mAbs) and another was crystallins aggregation that is associated with cataracts. Protein precipitation by PEG is a common technique for downstream processing. The effects of pH, ionic strength and the exclude volume effect on the protein precipitation by PEG were extensively studied, but the effects of glycosylation on protein precipitation by PEG has not been examined. Protein aggregation is not only a problem in downstream processing, but it …