Production and purification of protein nanocages displaying binding domains
Protein nanocages are naturally assembled structures composed of protein subunits which can be individually modified to give a multifunctional nanoplatform. Ferritin and E2 core domain are two examples of protein nanocages that can be engineered at the inner surface, external surface and interface b...
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sg-ntu-dr.10356-723632023-03-03T16:07:30Z Production and purification of protein nanocages displaying binding domains Lam, Ngo Cheung Lim Sierin School of Chemical and Biomedical Engineering DRNTU::Engineering::Bioengineering Protein nanocages are naturally assembled structures composed of protein subunits which can be individually modified to give a multifunctional nanoplatform. Ferritin and E2 core domain are two examples of protein nanocages that can be engineered at the inner surface, external surface and interface between subunits for enhanced functionality. Here, we are interested in displaying two types of binding domains on a mutated form of Archaeoglobus fulgidus ferritin (AfFtn-AA) and Geobacillus stearothemophilus E2: cellulose-binding domain (CBD) and lipid-binding domain (LBD). A CBD from the cellulosome complex of Clostridium thermocellum and three LBDs from mammalian proteins Epsin 1, Endophilin A1 and MARCKS were identified. Seven gene fusions were designed and constructed, of which four were expressed in E. coli as soluble recombinant proteins. Purification using heat treatment, hydrophobic interaction chromatography and ion exchange chromatography were attempted. MARCKS/AfFtnAA, when tagged with six histidine residues, was the only protein found to be significantly purified using affinity chromatography and a final polishing step of size exclusion chromatography. Master of Science (Biomedical Engineering) 2017-06-16T03:17:58Z 2017-06-16T03:17:58Z 2017 Thesis http://hdl.handle.net/10356/72363 en 71 p. application/pdf |
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DRNTU::Engineering::Bioengineering Lam, Ngo Cheung Production and purification of protein nanocages displaying binding domains |
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Protein nanocages are naturally assembled structures composed of protein subunits which can be individually modified to give a multifunctional nanoplatform. Ferritin and E2 core domain are two examples of protein nanocages that can be engineered at the inner surface, external surface and interface between subunits for enhanced functionality. Here, we are interested in displaying two types of binding domains on a mutated form of Archaeoglobus fulgidus ferritin (AfFtn-AA) and Geobacillus stearothemophilus E2: cellulose-binding domain (CBD) and lipid-binding domain (LBD). A CBD from the cellulosome complex of Clostridium thermocellum and three LBDs from mammalian proteins Epsin 1, Endophilin A1 and MARCKS were identified. Seven gene fusions were designed and constructed, of which four were expressed in E. coli as soluble recombinant proteins. Purification using heat treatment, hydrophobic interaction chromatography and ion exchange chromatography were attempted. MARCKS/AfFtnAA, when tagged with six histidine residues, was the only protein found to be significantly purified using affinity chromatography and a final polishing step of size exclusion chromatography. |
author2 |
Lim Sierin |
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Lim Sierin Lam, Ngo Cheung |
format |
Theses and Dissertations |
author |
Lam, Ngo Cheung |
author_sort |
Lam, Ngo Cheung |
title |
Production and purification of protein nanocages displaying binding domains |
title_short |
Production and purification of protein nanocages displaying binding domains |
title_full |
Production and purification of protein nanocages displaying binding domains |
title_fullStr |
Production and purification of protein nanocages displaying binding domains |
title_full_unstemmed |
Production and purification of protein nanocages displaying binding domains |
title_sort |
production and purification of protein nanocages displaying binding domains |
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2017 |
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http://hdl.handle.net/10356/72363 |
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1759857868491718656 |