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Université de Neuchâtel

The novel chloroplast outer membrane kinase KOC1 is a required component of the plastid protein import machinery

Zufferey-Arias, Mónica Alexandra ; Kessler, Felix (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

The chloroplast constitutes the site of photosynthesis and is an essential organelle in plant cells. An endosymbiotic event was at the origin of the chloroplast, an ancestral eukaryotic cell engulfing a photosynthetic cyanobacterium. During evolution, the majority of ancestral chloroplast genes were lost or transferred to the nucleus. The protein products of the successfully transferred genes are...

Université de Neuchâtel

The Novel Chloroplast Outer Membrane Kinase KOC1 Is a Required Component of the Plastid Protein Import Machinery

Zufferey, Mónica ; Montandon, Cyrille ; Douet, Véronique ; Demarsy, Emilie ; Agne, Birgit ; Baginsky, Sacha ; Kessler, Felix

In: Journal of biological chemistry, 2017, vol. 292, no. 17, p. 6952-6964

The biogenesis and maintenance of cell organelles such as mitochondria and chloroplasts require the import of many proteins from the cytosol, a process that is controlled by phosphorylation. In the case of chloroplasts, the import of hundreds of different proteins depends on translocons at the outer and inner chloroplast membrane (TOC and TIC, respectively) complexes. The essential protein TOC159...

Université de Neuchâtel

Study of moss vacuoles and functional characterization of the putative vacuolar receptors : the RMR proteins

Ayachi, Sanaa ; Neuhaus, Jean-Marc (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2012.

The vacuolar system of plants is a key element of plant growth and development, it fulfils many other functions. Plant cell can have more than two different vacuolar sorting systems: the lytic and the (seed) protein storage or vegetative storage vacuoles. Soluble vacuolar proteins are sorted through the secretory pathway to these vacuoles by three different routes, depending on different types of...

Université de Neuchâtel

Sorting of proteins to vacuoles in plant cells

Neuhaus, Jean-Marc ; Rogers, John C.

In: Plant Molecular Biology, 1998, vol. 38, p. 127-144

An individual plant cell may contain at least two functionally and structurally distinct types of vacuoles: protein storage vacuoles and lytic vacuoles. Presumably a cell that stores proteins in vacuoles must maintain these separate compartments to prevent exposure of the storage proteins to an acidified environment with active hydrolytic enzymes where they would be degraded. Thus, the...