Objetivo How did microbes evolve to use O2? How did O2-dependent pathways derive from or evolve under anoxic conditions? This central evolutionary mystery remains essentially unresolved. I contend that it is possible to identify the evolutionary history of modern aerobic pathways (APs), by discovering the vestiges of ancient anaerobic pathways (AnPs) that persist in modern microbes. Aerobic nitrifiers contain aerobic metabolisms, while few clues such as chlorite dismutase enzyme in Nitrospira, NO dismutase enzyme in Methylomirabilis, and electrochemical signals from aerobic nitrifiers support the notion that remnants of AnPs remain. Hence, I postulate that in nitrifiers currently considered strict aerobes, I can identify the vestiges and integral remains of the earliest APs: I will identify the AnPs of NH4+ oxidation that are driven by intracellular O2 production and respiration mediated by EET. By applying BES and batch incubations followed by isotopic and genomic experiments will evidence and characterize the novel AnPs in nitrifiers. Single cell genomics on FAC-sorted fluorescent-tagged cells followed by molecular phylogenetic analysis will provide a major contribution to unravelling the early evolution of aerobiosis and aerobic NH4+ oxidation, which is crucial as we seek the origins of life on Earth, and other planets. PAERADOX will provide me an interdisciplinary research training in the area of microbial physiology and genomics, molecular biology and computational evolution through international mobility (Harvard, MIT and DTU). Such a training-through-research platform will enhance my career development to a large extent. My return and reintegration to DTU will provide basis to transfer my interdisciplinary combination to European scientific community. I am confident that the international network, skills and knowledge that will be constructed during PAERADOX is an excellent investment for my future and for EU’s strength in the field of microbial evolution and ecology. Ámbito científico natural sciencesbiological sciencesgeneticsnatural scienceschemical scienceselectrochemistryelectrolysisnatural sciencesphysical sciencesastronomyplanetary sciencesplanetsnatural sciencesbiological sciencesbiochemistrybiomoleculesproteinsenzymesnatural sciencesbiological sciencesmolecular biology Palabras clave Microbial physiology anaerobic metabolic pathways aerobic nitrifiers nitrification genes computational evolution molecular phylogenetics NO dismutase extracellular electron transfer Programa(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Tema(s) MSCA-IF-2017 - Individual Fellowships Convocatoria de propuestas H2020-MSCA-IF-2017 Consulte otros proyectos de esta convocatoria Régimen de financiación MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF) Coordinador DANMARKS TEKNISKE UNIVERSITET Aportación neta de la UEn € 278 227,80 Dirección ANKER ENGELUNDS VEJ 101 2800 Kongens Lyngby Dinamarca Ver en el mapa Región Danmark Hovedstaden Københavns omegn Tipo de actividad Higher or Secondary Education Establishments Enlaces Contactar con la organización Opens in new window Sitio web Opens in new window Participación en los programas de I+D de la UE Opens in new window Red de colaboración de HORIZON Opens in new window Coste total € 278 227,80 Socios (1) Ordenar alfabéticamente Ordenar por aportación neta de la UE Ampliar todo Contraer todo Socio Las organizaciones asociadas contribuyen a la aplicación de la acción, pero no firman el acuerdo de subvención. PRESIDENT AND FELLOWS OF HARVARD COLLEGE Estados Unidos Aportación neta de la UEn € 0,00 Dirección MASSACHUSETTS AVENUE 1350 02138 Cambridge Ver en el mapa Tipo de actividad Higher or Secondary Education Establishments Enlaces Contactar con la organización Opens in new window Sitio web Opens in new window Participación en los programas de I+D de la UE Opens in new window Red de colaboración de HORIZON Opens in new window Coste total € 172 130,40