Fluorescent Labeling of the Nuclear Envelope by Localizing Green Fluorescent Protein on the Inner Nuclear Membrane

Area of Science:

• Cell Biology
• Molecular Biology
• Biophysics

Background:

• The nuclear envelope (NE) separates the nucleus from the cytoplasm in eukaryotic cells.
• NE breakdown and reformation are crucial events during mitosis, but mechanisms remain unclear.
• Understanding NE dynamics is vital for cell division research.

Purpose of the Study:

• To develop a method for fluorescently labeling the NE in living cells.
• To visualize and trace NE dynamics during cell division under physiological conditions.
• To investigate the distinct timing of NE and nuclear lamina reformation.

Main Methods:

• Utilized a unique biotinylation reaction from Sulfolobus tokodaii.
• Fixed green fluorescent protein with a nuclear localization signal to the inner nuclear membrane.
• Observed HeLa cells undergoing mitosis using confocal laser scanning microscopy.

Main Results:

• Successfully achieved fluorescent labeling of the NE in living cells.
• Enabled real-time tracing of NE dynamics during mitosis.
• Visually distinguished the timing differences between NE and nuclear lamina formation.

Conclusions:

• The developed method provides a powerful tool for studying NE dynamics.
• Offers new insights into the spatiotemporal regulation of nuclear envelope reformation.
• Facilitates further research into the mechanisms of cell division.