Kinetic analysis of translocation through nuclear pore complexes
AUTOR(ES)
Ribbeck, Katharina
FONTE
Oxford University Press
RESUMO
The mechanism of facilitated translocation through nuclear pore complexes (NPCs) is only poorly understood. Here, we present a kinetic analysis of the process using various model substrates. We find that the translocation capacity of NPCs is unexpectedly high, with a single NPC allowing a mass flow of nearly 100 MDa/s and rates in the order of 103 translocation events per second. Our data further indicate that high affinity interactions between the translocation substrate and NPC components are dispensable for translocation. We propose a ‘selective phase model’ that could explain how NPCs function as a permeability barrier for inert molecules and yet become selectively permeable for nuclear transport receptors and receptor–cargo complexes.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=145537Documentos Relacionados
- Imaging of single-molecule translocation through nuclear pore complexes
- Import of simian virus 40 virions through nuclear pore complexes.
- Rapid translocation of NTF2 through the nuclear pore of isolated nuclei and nuclear envelopes
- Optical recording of signal-mediated protein transport through single nuclear pore complexes
- Isolation of nuclear pore complexes in association with a lamina.