Integrative structure and functional anatomy of a nuclear pore complex.

Area of Science:

• Molecular Biology
• Cell Biology
• Structural Biology

Background:

• Nuclear pore complexes (NPCs) are crucial for nucleocytoplasmic transport.
• The large size and dynamic nature of NPCs hinder detailed structural and functional studies.

Purpose of the Study:

• To determine the complete structure of the Saccharomyces cerevisiae nuclear pore complex.
• To achieve sub-nanometer precision in structural elucidation.

Main Methods:

• Integrative structural biology approach.
• Reconciliation of diverse data on molecular arrangement.

Main Results:

• The 552-protein NPC structure was resolved at sub-nanometer precision.
• Identified sturdy diagonal columns and connector cables providing strength and flexibility.
• Revealed inwardly directed anchors organizing transport factor-docking sites in the central channel.

Conclusions:

• The determined NPC structure rationalizes its architecture and transport mechanisms.
• Provides insights into the evolutionary origins of the nuclear pore complex.
• Enables a deeper understanding of RNA and protein transport regulation.