Long Unfolded Linkers Facilitate Membrane Protein Import Through the Nuclear Pore Complex

Anne C. Meinema, Justyna K. Laba, Rizqiya A. Hapsari, Renee Otten, Frans A. A. Mulder, Annemarie Kralt, Geert van den Bogaart, C. Patrick Lusk, Bert Poolman, Liesbeth M. Veenhoff*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

76 Citations (Scopus)

Abstract

Active nuclear import of soluble cargo involves transport factors that shuttle cargo through the nuclear pore complex (NPC) by binding to phenylalanine-glycine (FG) domains. How nuclear membrane proteins cross through the NPC to reach the inner membrane is presently unclear. We found that at least a 120-residue-long intrinsically disordered linker was required for the import of membrane proteins carrying a nuclear localization signal for the transport factor karyopherin-a. We propose an import mechanism for membrane proteins in which an unfolded linker slices through the NPC scaffold to enable binding between the transport factor and the FG domains in the center of the NPC.

Original languageEnglish
Pages (from-to)90-93
Number of pages4
JournalScience
Volume333
Issue number6038
DOIs
Publication statusPublished - 1-Jul-2011

Keywords

  • INTRACELLULAR TRAFFICKING
  • ARCHITECTURE
  • TRANSPORT
  • DOMAIN

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