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

Fatty Acid Phytyl Ester Synthesis in Chloroplasts of Arabidopsis

Lippold, Felix ; vom Dorp, Katharina ; Abraham, Marion ; Hölzl, Georg ; Wewer, Vera ; Yilmaz, Jenny Lindberg ; Lager, Ida ; Montandon, Cyrille ; Besagni, Céline ; Kessler, Felix ; Stymne, Sten ; Dörmann, Peter

In: The Plant Cell, 2012, vol. 24, no. 5, p. 2001-2014

During stress or senescence, thylakoid membranes in chloroplasts are disintegrated, and chlorophyll and galactolipid are broken down, resulting in the accumulation of toxic intermediates, i.e., tetrapyrroles, free phytol, and free fatty acids. Chlorophyll degradation has been studied in detail, but the catabolic pathways for phytol and fatty acids remain unclear. A large proportion of phytol...

Université de Neuchâtel

Identification and characterization of putative Toc159 interacting partners

Montandon, Cyrille ; Kessler, Felix (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2015.

The chloroplast is the distinctive organelle of land plants and other photosynthetic eukaryotes. It carries out a variety of metabolic process, but photosynthesis is its main task and this is reflected in its structures and protein composition. Chloroplasts evolved from an endosymbiosis between a photosynthetic cyanobacterium and an ancestral eukaryote. Reminiscent of this autonomous origin, the...