The nuclear basket proteins Mlp1p and Mlp2p are part of a dynamic interactome including Esc1p and the proteasome

Mario Niepel, Kelly R. Molloy, Rosemary Williams, Julia C. Farrc, Anne C. Meinema, Nicholas Vecchietti, Ileana M. Cristea, Brian T. Chait, Michael P. Rout, Caterina Strambio-De-Castillia

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

The basket of the nuclear pore complex (NPC) is generally depicted as a discrete structure of eight protein filaments that protrude into the nucleoplasm and converge in a ring distal to the NPC. We show that the yeast proteins Mlp1p and Mlp2p are necessary components of the nuclear basket and that they also embed the NPC within a dynamic protein network, whose extended interactome includes the spindle organizer, silencing factors, the proteasome, and key components of messenger ribonucleoproteins (mRNPs). Ultrastructural observations indicate that the basket reduces chromatin crowding around the central transporter of the NPC and might function as a docking site for mRNP during nuclear export. In addition, we show that the Mlps contribute to NPC positioning, nuclear stability, and nuclear envelope morphology. Our results suggest that the Mlps are multifunctional proteins linking the nuclear transport channel to multiple macromolecular complexes involved in the regulation of gene expression and chromatin maintenance.

Original languageEnglish (US)
Pages (from-to)3920-3938
Number of pages19
JournalMolecular biology of the cell
Volume24
Issue number24
DOIs
StatePublished - Dec 15 2013

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Cell Biology

Fingerprint Dive into the research topics of 'The nuclear basket proteins Mlp1p and Mlp2p are part of a dynamic interactome including Esc1p and the proteasome'. Together they form a unique fingerprint.

Cite this