Imaging ER-to-Golgi transport: towards a systems view

Area of Science:

• Cell Biology
• Molecular Biology
• Biophysics

Background:

• Proteins synthesized in the endoplasmic reticulum (ER) undergo essential transport to the Golgi complex.
• The early secretory pathway is intricately linked with cellular processes like signal transduction.
• A systems-level quantitative understanding is crucial for deciphering these connections.

Purpose of the Study:

• To outline examples of dynamic ER-to-Golgi transport in living cells.
• To discuss advanced imaging methods for studying ER-to-Golgi transport.
• To delineate efforts in understanding ER-to-Golgi transport at the systems level.

Main Methods:

• In vivo observations using light microscopy of fluorescent proteins.
• Combining light microscopy with electron microscopy or super-resolution techniques.
• High-throughput microscopy in fixed and living cells with gene expression perturbations (e.g., RNA interference).

Main Results:

• Light microscopy enables in vivo observation of protein dynamics and interactions.
• Advanced imaging techniques allow near-ultrastructural resolution of protein and organelle dynamics.
• Systems-level approaches, including high-throughput microscopy, offer new avenues for understanding the early secretory pathway.

Conclusions:

• Dynamic organization of ER-to-Golgi transport is revealed through live-cell imaging.
• Advanced imaging methods are critical for studying ER-to-Golgi dynamics.
• Systems-level analysis is essential for a comprehensive molecular understanding of the early secretory pathway.