Functional link between ribosome formation and biogenesis of iron-sulfur proteins

A Yarunin, V G Panse, E Petfalski, C Dez, D Tollervey, E C Hurt

Research output: Contribution to journalArticlepeer-review

Abstract

In genetic screens for ribosomal export mutants, we identified CFD1, NBP35 and NAR1 as factors involved in ribosome biogenesis. Notably, these components were recently reported to function in extramitochondrial iron - sulfur ( Fe - S) cluster biosynthesis. In particular, Nar1 was implicated to generate the Fe - S clusters within Rli1, a potential substrate protein of unknown function. We tested whether the Fe - S protein Rli1 functions in ribosome formation. We report that rli1 mutants are impaired in prerRNA processing and defective in the export of both ribosomal subunits. In addition, Rli1p is associated with both pre-40S particles and mature 40S subunits, and with the eIF3 translation initiation factor complex. Our data reveal an unexpected link between ribosome biogenesis and the biosynthetic pathway of cytoplasmic Fe - S proteins.

Original languageEnglish
Pages (from-to)580-588
Number of pages9
JournalEMBO Journal
Volume24
Issue number3
DOIs
Publication statusPublished - 9 Feb 2005

Keywords

  • eIF3
  • iron–sulfur cluster
  • Nar1
  • ribosome export
  • Rli1

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