caa a22 4500 465758487 CHVBK 20180323111854.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF00312619 doi (NATIONALLICENCE)springer-10.1007/BF00312619 Cyanellar Ferredoxin-NADP+-oxidoreductase of Cyanophora paradoxa is encoded by the nuclear genome and synthesized on cytoplasmatic 80S ribosomes [Elektronische Daten] [Manfred Bayer, Thomas Maier, Ulrike Gebhart, Hainfried Schenk] Summary: Cyanophora paradoxa is an important model organism for the study of the transition from endocytobiontic cyanobacteria to factual eukaryotic cell organelles. The cyanelles of these organisms possess cyanobacterial, as well as plastidic, characteristics. Although the transfer of cyanellar proteins from cytosolic into cyanellar space has been shown, the process of translocation of a known protein across the peptidoglycan layer and the envelope membranes has not been characterized. In this study we demonstrate that a specific and obligate cyanelle protein —Ferredoxin-NADP+-oxidoreductase (FNR) — is coded on the nuclear genome, synthesized on 80S ribosomes and transported from the eukaryotic cell compartment into the cyanelles of Cyanophora paradoxa, an original intracellular host-guest relation. These results indicate a gene transfer from guest to host genome and support the view that, in spite of their cyanobacterial origin, cyanelles have been evolved to cell organelles comparable to plastids. Springer-Verlag, 1990 Cyanophora paradoxa nationallicence Ferredoxin-NADP+-oxidoreductase nationallicence Protein-import nationallicence Evolution nationallicence Bayer Manfred Institut für Biologie I, Universität Tübingen, D-7400, Tübingen, Germany aut Maier Thomas Institut für Biologie I, Universität Tübingen, D-7400, Tübingen, Germany aut Gebhart Ulrike Institut für Biologie I, Universität Tübingen, D-7400, Tübingen, Germany aut Schenk Hainfried Institut für Biologie I, Universität Tübingen, D-7400, Tübingen, Germany aut Current Genetics Springer-Verlag 17/3(1990-03-01), 265-267 0172-8083 17:3<265 1990 17 294 https://doi.org/10.1007/BF00312619 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00312619 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bayer Manfred Institut für Biologie I, Universität Tübingen, D-7400, Tübingen, Germany aut NATIONALLICENCE 700 1- Maier Thomas Institut für Biologie I, Universität Tübingen, D-7400, Tübingen, Germany aut NATIONALLICENCE 700 1- Gebhart Ulrike Institut für Biologie I, Universität Tübingen, D-7400, Tübingen, Germany aut NATIONALLICENCE 700 1- Schenk Hainfried Institut für Biologie I, Universität Tübingen, D-7400, Tübingen, Germany aut NATIONALLICENCE 773 0- Current Genetics Springer-Verlag 17/3(1990-03-01), 265-267 0172-8083 17:3<265 1990 17 294 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer