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| Type |
Oral Presentation |
| Area |
Oral Presentation in Chemistry of Life |
| Room No. |
Room 203 |
| Time |
THU 10:40-: |
| Code |
BIO.O-6 |
| Subject |
Ultrastable Synthetic Host-guest interactions: a Novel Supramolecular Tool for Chemical Biology |
| Authors |
Kyeng Min Park
Center for Self-assembly and Complexity, Institute for Basic Science, Korea |
| Abstract |
The streptavidin (Sv)-biotin (BT) system with a high binding affinity (K ~ 1013 M-1) as a protein-ligand binding pair has been utilized as a powerful chemical biology tool for protein imaging, purification, and analysis. However, the Sv-BT pair has some intrinsic shortcomings; 1) interference of binding from endogenous biotins that are widespread in cells and tissues, and involved in various metabolic pathways in many species 2) false positive signals caused by endogenously biotinylated proteins 3) difficulty in chemical modification and instability of streptavidin (protein) degraded by proteases in cellular conditions. Recently, we developed a new ultrastable synthetic binding pair as “supramolecular latching system” consisting of cucurbit[7]uril (CB[7]) and ferrocenemethylamine (FcA) or adamantineamine (AdA), which has almost comparable (or even higher) binding affinity (K ~1012-15 M-1) to Sv-BT with unique features including 1) bio-orthogonality in binding which is not affected by endogenous biomolecules such as biotin, 2) a small size with stable and robust chemical structure, 3) scalability using known chemical synthetic methods and 4) convenient uses with easy-to-handle and 5) controllable binding affinity by treating strong competitors, by which the binding of the synthetic host-guest pair can be modulated on-demand as supramolecular latch “on” and “off”. Here, I will talk about our recent efforts to utilize this supramolecular latching system for visualization of spatially specific proteins in and on living organisms such as cells and Caenorhabditis elegans (C. elegans). In addition, our extended efforts to utilize it for spatiotemporal proteome mapping in living cells by combining with a promiscuous protein labeling method will be introduced. |
| E-mail |
kmpark@ibs.re.kr |
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121st General Meeting of the KCS