Objective Tremendous progress has been made in the last decade in the genetic characterization of microorganisms, both in culture and in the environment. However, our knowledge of microbial membrane lipids, essential building blocks of the cell, has only marginally improved. This is remarkable since there exists a dichotomy in the distribution of lipids between the three Domains of Life. Diacyl glycerols based on straight-chain fatty acids are produced by bacteria and eukaryotes, whereas archaea synthesize isoprenoidal glycerol ether lipids. From a microbial evolutionary perspectives, this ‘lipid divide’ is enigmatic since it has recently become clear that eukaryotes evolved from the archaea. Preliminary results of my research group show that when novel analytical methodology is used, there is a large hidden diversity in microbial lipid composition that may resolve this fundamental question. Here I propose to systematically characterize prokaryotic intact polar lipids (IPLs) with state-of-the-art analytical techniques based on liquid chromatography and high-resolution mass spectrometry to bring our knowledge of microbial lipids to the next level. To this end, we will characterize (i) 250+ bacterial and archaeal cultures and (ii) 200+ environmental samples for IPLs by HPLC-MS, complemented by full identification of fatty acids and other lipids released after acid hydrolysis of total cells. This approach will be complemented by the characterisation of functional genes for lipid biosynthesis. This will involve both mapping of known genes, based on the analysis of published whole (meta)genome data, as well as the identification of as yet unknown genes in selected groups of prokaryotes. The results are expected to make a fundamental contribution to (i) our understanding of the evolution of biosynthesis of membrane lipids, (ii) their application as microbial markers in the environment, and (iii) in the development and application of organic proxies in earth sciences. Fields of science natural sciencesbiological sciencesmicrobiologybacteriologynatural sciencesbiological sciencesbiochemistrybiomoleculeslipidsnatural scienceschemical sciencesanalytical chemistrymass spectrometrynatural sciencesearth and related environmental sciencesnatural sciencesbiological sciencesbiochemistrybiomoleculesproteinsenzymes Programme(s) H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) Main Programme Topic(s) ERC-ADG-2015 - ERC Advanced Grant Call for proposal ERC-2015-AdG See other projects for this call Funding Scheme ERC-ADG - Advanced Grant Coordinator STICHTING NEDERLANDSE WETENSCHAPPELIJK ONDERZOEK INSTITUTEN Net EU contribution € 2 499 426,00 Address Winthontlaan 2 3526 KV Utrecht Netherlands See on map Region West-Nederland Utrecht Utrecht Activity type Research Organisations Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Other funding € 0,00 Beneficiaries (1) Sort alphabetically Sort by Net EU contribution Expand all Collapse all STICHTING NEDERLANDSE WETENSCHAPPELIJK ONDERZOEK INSTITUTEN Netherlands Net EU contribution € 2 499 426,00 Address Winthontlaan 2 3526 KV Utrecht See on map Region West-Nederland Utrecht Utrecht Activity type Research Organisations Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Other funding € 0,00
