Format

Send to

Choose Destination
See comment in PubMed Commons below
Nat Struct Mol Biol. 2009 Jul;16(7):782-8. doi: 10.1038/nsmb.1618. Epub 2009 Jun 7.

Three-dimensional structure and flexibility of a membrane-coating module of the nuclear pore complex.

Author information

1
Laboratory of Cell Biology, Howard Hughes Medical Institute, The Rockefeller University, New York, New York, USA.

Abstract

The nuclear pore complex mediates nucleocytoplasmic transport in all eukaryotes and is among the largest cellular assemblies of proteins, collectively known as nucleoporins. Nucleoporins are organized into distinct subcomplexes. We optimized the isolation of a putative membrane-coating subcomplex of the nuclear pore complex, the heptameric Nup84 complex, and analyzed its structure by EM. Our data confirmed the previously reported 'Y' shape. We discerned additional structural details, including specific hinge regions at which the particle shows great flexibility. We determined the three-dimensional structures of two conformers, mapped the localization of two nucleoporins within the subcomplex and docked known crystal structures into the EM maps. The free ends of the Y-shaped particle are formed by beta-propellers; the connecting segments consist of alpha-solenoids. Notably, the same organizational principle is found in the clathrin triskelion, which may share a common evolutionary origin with the heptameric complex.

PMID:
19503077
PMCID:
PMC2706296
DOI:
10.1038/nsmb.1618
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Nature Publishing Group Icon for PubMed Central
    Loading ...
    Support Center