Enriching the pore: splendid complexity from humble origins

Area of Science:

• Cell Biology
• Evolutionary Biology
• Structural Biology

Background:

• The nucleus, a hallmark of eukaryotic cells, is enclosed by a nuclear envelope (NE).
• The nuclear pore complex (NPC) is essential for regulating molecular traffic between the nucleus and cytoplasm.
• Understanding NPC structure and function is key to differentiating eukaryotic and prokaryotic cell forms.

Purpose of the Study:

• To review recent advances in mapping NPC structure and function across diverse organisms.
• To reconstruct the evolutionary history of the NPC.
• To propose a model for NPC evolution.

Main Methods:

• Comparative analysis of NPC structures and functions across eukaryotes.
• Reconstruction of evolutionary events leading to modern NPC forms.
• Integration of structural and functional data to infer evolutionary constraints.

Main Results:

• Recent studies have provided detailed insights into NPC architecture and transport mechanisms.
• Common and differential NPC features have been identified across eukaryotic lineages.
• Evolutionary pathways and constraints shaping the NPC are becoming clearer.

Conclusions:

• The NPC has evolved through a series of conserved and divergent events.
• Understanding NPC evolution provides insights into fundamental eukaryotic cell biology.
• A proposed model integrates current knowledge on NPC origins and diversification.