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TACK Superphylum and Lokiarchaeota Evolution: Dissecting the Ecology and Evolution of Archaea to Elucidate the Prokaryote to Eukaryote Transition

Total Cost €


EC-Contrib. €






 TACKLE project word cloud

Explore the words cloud of the TACKLE project. It provides you a very rough idea of what is the project "TACKLE" about.

instrumental    prokaryotic    investigation    structural    thermophilic    local    harbor    reconstructing    ancestor    situ    arose    cutting    traits    cells    lokiarchaeota    mark    eukaryotes    molecular    largely    phylogenomic    archaea    direct    complexity    array    stable    thaumarchaeota    tackl    metagenomics    metabolic    unprecedented    obviously    ancestral    uncharacterized    biology    beside    gene    cultivation    environments    earth    lineage    accessible    emergence    questions    descent    radiated    sediments    found    forms    ancestry    biological    resolve    line    ecological    relatives    repertoire    indicated    systematic    lineages    biochemical    habitat    group    isotope    transitions    fundamental    closest    cultivate    groups    marine    commonplace    life    sole    evolution    archaeal    edge    least    exhibits    genomic    newly    virtually    discovered    sister    techniques    insights    metatranscriptomic    deep    genes    imaging    eukaryotic    give    moderate    reconstruct    living    cellular    successfully    evolutionary    enigma    context    superphylum   

Project "TACKLE" data sheet

The following table provides information about the project.


Organization address
city: WIEN
postcode: 1010

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Austria [AT]
 Project website
 Total cost 2˙500˙000 €
 EC max contribution 2˙500˙000 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2015-AdG
 Funding Scheme ERC-ADG
 Starting year 2016
 Duration (year-month-day) from 2016-08-01   to  2021-07-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITAT WIEN AT (WIEN) coordinator 2˙500˙000.00


 Project objective

The emergence of complex eukaryotic life forms on Earth from prokaryotic cells is one of the most fundamental questions in biology and also one of the least understood transitions in evolution. Phylogenomic studies recently indicated that the eukaryotic line of descent arose from within the TACKL superphylum of Archaea. This proposal addresses the systematic analysis of two newly discovered, but largely uncharacterized lineages of Archaea from this superphylum that mark crucial evolutionary transitions. Thaumarchaeota harbor unique ‘eukaryotic’ features and represent the sole group of Archaea that has successfully radiated into virtually any moderate habitat on Earth. The Lokiarchaeota lineage found recently in deep marine sediments forms a direct sister group of Eukaryotes and exhibits an unprecedented array of genes that might have been instrumental for the ancestor of eukaryotes to develop its cellular and genomic complexity. Obviously, the molecular and biochemical investigation of both groups is timely and important, yet, it requires easy access and cultivation. We have now discovered Lokiarchaeota in local, accessible environments and were able to successfully cultivate thermophilic Thaumarchaeota. In this proposal, we will characterize the metabolic and structural traits of these two archaeal lineages and reconstruct their evolutionary ancestry in the context of the TACKL superphylum. Beside the use of cutting edge techniques for cultivation, metagenomics and stable-isotope-based imaging, a novel method will be developed for in situ metatranscriptomic analyses of archaea. This project will give fundamental insights into the ecological success of Archaea in commonplace environments and into the biology of the closest living prokaryotic relatives of Eukaryotes. Reconstructing the ancestral gene repertoire and biological features of lineages of the TACKL superphylum will help resolve the enigma of the emergence of eukaryotes.


year authors and title journal last update
List of publications.
2018 Ricardo J. Eloy Alves, Bui Quang Minh, Tim Urich, Arndt von Haeseler, Christa Schleper
Unifying the global phylogeny and environmental distribution of ammonia-oxidising archaea based on amoA genes
published pages: , ISSN: 2041-1723, DOI: 10.1038/s41467-018-03861-1
Nature Communications 9/1 2019-10-09
2018 Jessica A Kozlowski
Microbial diversity of a closed salt lagoon in the Puertecitos area, Upper Gulf of California
published pages: 71-90, ISSN: 0185-3880, DOI: 10.7773/cm.v44i2.2825
Ciencias Marinas 44/2 2019-10-09
2018 Sophie S. Abby, Michael Melcher, Melina Kerou, Mart Krupovic, Michaela Stieglmeier, Claudia Rossel, Kevin Pfeifer, Christa Schleper
Candidatus Nitrosocaldus cavascurensis, an Ammonia Oxidizing, Extremely Thermophilic Archaeon with a Highly Mobile Genome
published pages: , ISSN: 1664-302X, DOI: 10.3389/fmicb.2018.00028
Frontiers in Microbiology 9 2019-10-09
2019 Ricardo J. Eloy Alves, Melina Kerou, Anna Zappe, Romana Bittner, Sophie S. Abby, Heiko A. Schmidt, Kevin Pfeifer, Christa Schleper
Ammonia Oxidation by the Arctic Terrestrial Thaumarchaeote Candidatus Nitrosocosmicus arcticus Is Stimulated by Increasing Temperatures
published pages: , ISSN: 1664-302X, DOI: 10.3389/fmicb.2019.01571
Frontiers in Microbiology 10 2019-10-03
2017 Felix J. Elling, Martin Könneke, Graeme W. Nicol, Michaela Stieglmeier, Barbara Bayer, Eva Spieck, José R. de la Torre, Kevin W. Becker, Michael Thomm, James I. Prosser, Gerhard J. Herndl, Christa Schleper, Kai-Uwe Hinrichs
Chemotaxonomic characterisation of the thaumarchaeal lipidome
published pages: 2681-2700, ISSN: 1462-2912, DOI: 10.1111/1462-2920.13759
Environmental Microbiology 19/7 2019-06-13

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