Crossref journal-article
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (341)
Abstract

By using titin as a model system, we have demonstrated that fluorescence quenching can be used to study protein folding at the single molecule level. The unfolded titin molecules with multiple dye molecules attached are able to fold to the native state. In the native folded state, the fluorescence from dye molecules is quenched due to the close proximity between the dye molecules. Unfolding of the titin leads to a dramatic increase in the fluorescence intensity. Such a change makes the folded and unfolded states of a single titin molecule clearly distinguishable and allows us to measure the folding dynamics of individual titin molecules in real time. We have also shown that fluorescence quenching can signal folding and unfolding of a small protein with only one immunoglobulin domain.

Bibliography

Zhuang, X., Ha, T., Kim, H. D., Centner, T., Labeit, S., & Chu, S. (2000). Fluorescence quenching: A tool for single-molecule protein-folding study. Proceedings of the National Academy of Sciences, 97(26), 14241–14244.

Authors 6
  1. Xiaowei Zhuang (first)
  2. Taekjip Ha (additional)
  3. Harold D. Kim (additional)
  4. Thomas Centner (additional)
  5. Siegfried Labeit (additional)
  6. Steven Chu (additional)
Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 10:36 a.m.)
Deposited 1 year, 7 months ago (Jan. 3, 2024, 11:54 p.m.)
Indexed 8 hours, 20 minutes ago (Aug. 27, 2025, 12:12 p.m.)
Issued 24 years, 8 months ago (Dec. 19, 2000)
Published 24 years, 8 months ago (Dec. 19, 2000)
Published Online 24 years, 8 months ago (Dec. 19, 2000)
Published Print 24 years, 8 months ago (Dec. 19, 2000)
Funders 0

None

@article{Zhuang_2000, title={Fluorescence quenching: A tool for single-molecule protein-folding study}, volume={97}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.97.26.14241}, DOI={10.1073/pnas.97.26.14241}, number={26}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Zhuang, Xiaowei and Ha, Taekjip and Kim, Harold D. and Centner, Thomas and Labeit, Siegfried and Chu, Steven}, year={2000}, month=dec, pages={14241–14244} }