Macorano and Nowack provide an overview of Paulinella chromatophora, a filose amoeba that harbors an organelle called a chromatophore and only the second known case of a eukaryote forming a primary endosymbiosis with a photosynthetic bacterium. Studying this relatively young relationship offers the chance to study the early stages of endosymbiosis.
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Tracking N-terminal protein processing from the Golgi to the chromatophore of a rhizarian amoeba.
Plant Physiol
June 2022
Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France.
Mass spectrometry analysis of protein processing in a photosynthetic rhizarian amoeba, , suggests a major trafficking route from the cytosol to the chromatophore via the Golgi.
View Article and Find Full Text PDFA bipartite chromatophore transit peptide and N-terminal protein processing in the Paulinella chromatophore.
Plant Physiol
May 2022
Department of Biology, Institute of Microbial Cell Biology, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany.
The amoeba Paulinella chromatophora contains photosynthetic organelles, termed chromatophores, which evolved independently from plastids in plants and algae. At least one-third of the chromatophore proteome consists of nucleus-encoded (NE) proteins that are imported across the chromatophore double envelope membranes. Chromatophore-targeted proteins exceeding 250 amino acids (aa) carry a conserved N-terminal extension presumably involved in protein targeting, termed the chromatophore transit peptide (crTP).
View Article and Find Full Text PDFPaulinella chromatophora.
Curr Biol
September 2021
Institute for Microbial Cell Biology, Biology Department, Heinrich Heine University Düsseldorf, Düsseldorf, Germany. Electronic address:
Macorano and Nowack provide an overview of Paulinella chromatophora, a filose amoeba that harbors an organelle called a chromatophore and only the second known case of a eukaryote forming a primary endosymbiosis with a photosynthetic bacterium. Studying this relatively young relationship offers the chance to study the early stages of endosymbiosis.
View Article and Find Full Text PDFThe Puzzle of Metabolite Exchange and Identification of Putative Octotrico Peptide Repeat Expression Regulators in the Nascent Photosynthetic Organelles of .
Front Microbiol
November 2020
Department of Biology, Institute of Microbial Cell Biology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.
The endosymbiotic acquisition of mitochondria and plastids more than one billion years ago was central for the evolution of eukaryotic life. However, owing to their ancient origin, these organelles provide only limited insights into the initial stages of organellogenesis. The cercozoan amoeba contains photosynthetic organelles-termed chromatophores-that evolved from a cyanobacterium ∼100 million years ago, independently from plastids in plants and algae.
View Article and Find Full Text PDFKaistia algarum sp. nov., isolated from a freshwater green alga Paulinella chromatophora.
Int J Syst Evol Microbiol
September 2018
Department of Life Science, Chung-Ang University, Seoul 06974, Republic of Korea.
A Gram-negative, strictly aerobic, non-motile and short rod- or coccus-shaped bacterium, designated strain LYH11, was isolated from a freshwater green alga Paulinella chromatophora. The strain grew at 5-37 °C (optimum, 30 °C) and pH 6-9 (pH 7) and in the presence of 0-1 % (w/v) NaCl (optimum, 0 %). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain LYH11 clearly belonged to the genus Kaistia of the family Rhizobiaceae.
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