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  4. The Chloroplast Import Receptor Toc90 Partially Restores the Accumulation of Toc159 Client Proteins in the <i>Arabidopsis thaliana ppi2</i> Mutant
 
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The Chloroplast Import Receptor Toc90 Partially Restores the Accumulation of Toc159 Client Proteins in the <i>Arabidopsis thaliana ppi2</i> Mutant

Auteur(s)
Infanger, Sibylle
Editeur(s)
Bischof, Sylvain
Hiltbrunner, Andreas
Agne, Birgit
Baginsky, Sacha
Kessler, Félix 
Institut de biologie 
In
Molecular Plant, Cell Press, 2011/4/2/252–263
Mots-clés
  • hloroplast

  • protein import

  • Toc159

  • substrate specificity...

  • proteomics

Résumé
Successful import of hundreds of nucleus-encoded proteins is essential for chloroplast biogenesis. The import of cytosolic precursor proteins relies on the Toc- (translocon at the outer chloroplast membrane) and Tic- (translocon at the inner chloroplast membrane) complexes. In <i>Arabidopsis thaliana</i>, precursor recognition is mainly mediated by outer membrane receptors belonging to two gene families: Toc34/33 and Toc159/132/120/90. The role in import and precursor selectivity of these receptors has been intensively studied, but the function of Toc90 still remains unclear. Here, we report the ability of Toc90 to support the import of Toc159 client proteins. We show that the overexpression of Toc90 partially complements the albino knockout of Toc159 and restores photoautotrophic growth. Several lines of evidence including proteome profiling demonstrate the import and accumulation of proteins essential for chloroplast biogenesis and functionality.
URI
https://libra.unine.ch/handle/123456789/5139
DOI
10.1093/mp/ssq071
Autre version
http://dx.doi.org/10.1093/mp/ssq071
Type de publication
Resource Types::text::journal::journal article
Dossier(s) à télécharger
 main article: Infanger_S.-Chloroplast_Import-20170222160947-YL.pdf (1.53 MB)
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