Three proteins mediate import of transit sequence-less precursors into the inner envelope of chloroplasts in Arabidopsis thaliana
Abstract
Chloroplasts contain approximately 3,000 proteins, of which most are nuclear gene products synthesized in the cytosol with NH2-terminal, cleavable extensions referred to as chloroplast transit peptides for import. Chloroplasts additionally contain a set of plastid proteins lacking cleavable transit peptides. In this article we show how transit sequence-less proteins are transported from the cytosol to the inner envelope of the chloroplast. This import pathway is comparable to the mitochondrial pathway used for the import of carrier proteins and other, hydrophobic proteins without a transit sequence into the inner mitochondrial membrane.
- Publication:
-
Proceedings of the National Academy of Science
- Pub Date:
- December 2013
- DOI:
- 10.1073/pnas.1319648110
- Bibcode:
- 2013PNAS..11019962R