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Super-resolution Imaging of the Bacterial Division Machinery
Published on: January 21, 2013
Super-resolution imaging in live Caulobacter crescentus cells using photoswitchable EYFP
Julie S Biteen1, Michael A Thompson, Nicole K Tselentis
1Department of Chemistry, Stanford University, 375 North-South Mall, Stanford, California 94305, USA.
Nature Methods
|September 17, 2008
Summary
Enhanced Yellow Fluorescent Protein (EYFP) allows super-resolution imaging of intracellular structures in living cells. This technique resolved the bacterial actin protein MreB superstructure at sub-40 nm resolution.
Area of Science:
- Cell Biology
- Biophysics
- Microscopy
Background:
- Optical microscopy has limitations in resolving nanoscale structures within living cells.
- Super-resolution microscopy techniques aim to overcome the diffraction limit of light.
- Enhanced Yellow Fluorescent Protein (EYFP) is a widely used fluorescent marker.
Purpose of the Study:
- To evaluate the utility of monomeric EYFP for super-resolution imaging in live cells.
- To visualize the intracellular protein structures beyond the optical resolution limit.
- To achieve high-resolution imaging of bacterial cytoskeletal components.
Main Methods:
- Utilized photoinduced activation of single EYFP fusions.
- Employed time-lapse imaging techniques.
- Applied super-resolution imaging to live Caulobacter crescentus cells.
Main Results:
- Achieved sub-40 nm resolution imaging of intracellular structures.
- Successfully visualized the filamentous superstructure of the bacterial actin protein MreB.
- Demonstrated the capability of EYFP as a suitable emitter for in vivo super-resolution.
Conclusions:
- Monomeric EYFP is effective for super-resolution imaging in live cells.
- The developed method enables visualization of bacterial cytoskeletal organization at nanoscale.
- EYFP facilitates advanced studies of protein dynamics and structures in vivo.
