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Nanomechanical Basis of Selective Gating by the Nuclear Pore Complex
Roderick Y. H. Lim, Birthe Fahrenkrog, Joachim Köser, Kyrill Schwarz-Herion, Jie Deng and Ueli Aebi
New Series, Vol. 318, No. 5850 (Oct. 26, 2007), pp. 640-643
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/20051458
Page Count: 4
You can always find the topics here!Topics: Molecules, Microinjections, Nuclear pore, Nuclear pore complex proteins, Molecular interactions, Physiological regulation, Freight transport, Cytoplasm, Biochemistry, Karyopherins
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The nuclear pore complex regulates cargo transport between the cytoplasm and the nucleus. We set out to correlate the governing biochemical interactions to the nanoscopic responses of the phenylalanineglycine (FG)--rich nucleoporin domains, which are involved in attenuating or promoting cargo translocation. We found that binding interactions with the transport receptor karyopherin-β1 caused the FG domains of the human nucleoporin Nup153 to collapse into compact molecular conformations. This effect was reversed by the action of Ran guanosine triphosphate, which returned the FG domains into a polymer brush-like, entropic barrier conformation. Similar effects were observed in Xenopus oocyte nuclei in situ. Thus, the reversible collapse of the FG domains may play an important role in regulating nucleocytoplasmic transport.
Science © 2007 American Association for the Advancement of Science