- document
-
Gambelli, Lavinia (author), Mesman, Rob (author), Versantvoort, Wouter (author), Diebolder, Christoph A. (author), Engel, A.H. (author), Evers, W.H. (author), Jetten, Mike S.M. (author), Pabst, Martin (author), Daum, Bertram (author)Methylomirabilis bacteria perform anaerobic methane oxidation coupled to nitrite reduction via an intra-aerobic pathway, producing carbon dioxide and dinitrogen gas. These diderm bacteria possess an unusual polygonal cell shape with sharp ridges that run along the cell body. Previously, a putative surface protein layer (S-layer) was observed...journal article 2021
- document
-
Lawson, Christopher E. (author), Mundinger, Aniela B. (author), Koch, Hanna (author), Jacobson, Tyler B. (author), Weathersby, Coty A. (author), Jetten, Mike S.M. (author), Pabst, Martin (author), Amador-Noguez, Daniel (author), Noguera, Daniel R. (author)Nitrite-oxidizing bacteria belonging to the genus Nitrospira mediate a key step in nitrification and play important roles in the biogeochemical nitrogen cycle and wastewater treatment. While these organisms have recently been shown to exhibit metabolic flexibility beyond their chemolithoautotrophic lifestyle, including the use of simple...journal article 2021
- document
-
Lawson, Christopher E. (author), Nuijten, Guylaine H.L. (author), de Graaf, Rob M. (author), Jacobson, Tyler B. (author), Pabst, Martin (author), Stevenson, David M. (author), Jetten, Mike S.M. (author), Noguera, Daniel R. (author), McMahon, Katherine D. (author)Anaerobic ammonium-oxidizing (anammox) bacteria mediate a key step in the biogeochemical nitrogen cycle and have been applied worldwide for the energy-efficient removal of nitrogen from wastewater. However, outside their core energy metabolism, little is known about the metabolic networks driving anammox bacterial anabolism and use of...journal article 2020
- document
-
Ghashghavi, Mohammad (author), Belova, Svetlana E. (author), Bodelier, Paul L.E. (author), Dedysh, Svetlana N. (author), Kox, Martine A.R. (author), Speth, Daan R. (author), Frenzel, Peter (author), Jetten, M.S.M. (author), Lücker, Sebastian (author), Lüke, Claudia (author)Methane-oxidizing microorganisms perform an important role in reducing emissions of the greenhouse gas methane to the atmosphere. To date, known bacterial methanotrophs belong to the Proteobacteria, Verrucomicrobia, and NC10 phyla. Within the Proteobacteria phylum, they can be divided into type Ia, type Ib, and type II methanotrophs. Type Ia...journal article 2019
- document
-
Versantvoort, Wouter (author), Guerrero-Cruz, Simon (author), Speth, Daan R. (author), Frank, J. (author), Gambelli, Lavinia (author), Cremers, Geert (author), van Alen, Theo (author), Jetten, M.S.M. (author), Kartal, Boran (author), Op den Camp, Huub J.M. (author), Reimann, Joachim (author)Methane is a potent greenhouse gas, which can be converted by microorganism at the expense of oxygen, nitrate, nitrite, metal-oxides or sulfate. The bacterium 'Candidatus Methylomirabilis oxyfera,' a member of the NC10 phylum, is capable of nitrite-dependent anaerobic methane oxidation. Prolonged enrichment of 'Ca. M. oxyfera' with cerium...journal article 2018
- document
-
Jetten, L. (author), van Iersel, L.J.J. (author)Rooted phylogenetic networks are used to describe evolutionary histories that contain non-treelike evolutionary events such as hybridization and horizontal gene transfer. In some cases, such histories can be described by a phylogenetic base-tree with additional linking arcs, which can for example represent gene transfer events. Such phylogenetic...journal article 2018
- document
-
Ferousi, Christina (author), Lindhoud, S. (author), Baymann, Frauke (author), Kartal, Boran (author), Jetten, M.S.M. (author), Reimann, Joachim (author)The most abundant transition metal in biological systems is iron. It is incorporated into protein cofactors and serves either catalytic, redox or regulatory purposes. Anaerobic ammonium oxidizing (anammox) bacteria rely heavily on iron-containing proteins – especially cytochromes – for their energy conservation, which occurs within a unique...review 2017
- document
-
Vaksmaa, Annika (author), Jetten, M.S.M. (author), Ettwig, Katharina F. (author), Lüke, Claudia (author)The nitrogen and methane cycles are important biogeochemical processes. Recently, ‘Candidatus Methanoperedens nitroreducens,’ archaea that catalyze nitrate-dependent anaerobic oxidation of methane (AOM), were enriched, and their genomes were analyzed. Diagnostic molecular tools for the sensitive detection of ‘Candidatus M. nitroreducens’ are...journal article 2017
- document
-
Vaksmaa, Annika (author), Guerrero-Cruz, Simon (author), van Alen, Theo A. (author), Cremers, Geert (author), Ettwig, Katharina F. (author), Lüke, Claudia (author), Jetten, M.S.M. (author)Paddy fields are a significant source of methane and contribute up to 20% of total methane emissions from wetland ecosystems. These inundated, anoxic soils featuring abundant nitrogen compounds and methane are an ideal niche for nitrate-dependent anaerobic methanotrophs. After 2 years of enrichment with a continuous supply of methane and...journal article 2017
- document
-
Speth, Daan R. (author), Lagkouvardos, Ilias (author), Wang, Yong (author), Qian, Pei Yuan (author), Dutilh, Bas E. (author), Jetten, M.S.M. (author)Several recent studies have indicated that members of the phylum Planctomycetes are abundantly present at the brine-seawater interface (BSI) above multiple brine pools in the Red Sea. Planctomycetes include bacteria capable of anaerobic ammonium oxidation (anammox). Here, we investigated the possibility of anammox at BSI sites using...journal article 2017
- document
-
Rasigraf, Olivia (author), Schmitt, Julia (author), Jetten, M.S.M. (author), Lüke, Claudia (author)The biological nitrogen cycle is driven by a plethora of reactions transforming nitrogen compounds between various redox states. Here, we investigated the metagenomic potential for nitrogen cycle of the in situ microbial community in an oligotrophic, brackish environment of the Bothnian Sea sediment. Total DNA from three sediment depths was...journal article 2017
- document
-
Timmers, Peer H.A. (author), Welte, Cornelia U. (author), Koehorst, Jasper J. (author), Plugge, Caroline M. (author), Jetten, M.S.M. (author), Stams, Alfons J M (author)Anaerobic oxidation of methane (AOM) is catalyzed by anaerobic methane-oxidizing archaea (ANME) via a reverse and modified methanogenesis pathway. Methanogens can also reverse the methanogenesis pathway to oxidize methane, but only during net methane production (i.e., "trace methane oxidation"). In turn, ANME can produce methane, but only...review 2017
- document
-
Lüke, Claudia (author), Speth, Daan R. (author), Kox, Martine A R (author), Villanueva, Laura (author), Jetten, M.S.M. (author)Oxygen minimum zones (OMZ) are areas in the global ocean where oxygen concentrations drop to below one percent. Low oxygen concentrations allow alternative respiration with nitrate and nitrite as electron acceptor to become prevalent in these areas, making them main contributors to oceanic nitrogen loss. The contribution of anammox and...journal article 2016
- document
-
Speth, Daan R. (author), In'T Zandt, Michiel H. (author), Guerrero-Cruz, Simon (author), Dutilh, Bas E. (author), Jetten, M.S.M. (author)Partial-nitritation anammox (PNA) is a novel wastewater treatment procedure for energy-efficient ammonium removal. Here we use genome-resolved metagenomics to build a genome-based ecological model of the microbial community in a full-scale PNA reactor. Sludge from the bioreactor examined here is used to seed reactors in wastewater treatment...journal article 2016
- document
-
De Almeida, N.M. (author), Neumann, S. (author), Mesman, R.J. (author), Ferousi, C. (author), Keltjens, J.T. (author), Jetten, M.S.M. (author), Kartal, B. (author), Van Niftrik, L. (author)Anaerobic ammonium-oxidizing (anammox) bacteria oxidize ammonium with nitrite as the terminal electron acceptor to form dinitrogen gas in the absence of oxygen. Anammox bacteria have a compartmentalized cell plan with a central membrane-bound “prokaryotic organelle” called the anammoxosome. The anammoxosome occupies most of the cell volume, has...journal article 2015
- document
-
Speth, D.R. (author), Russ, L. (author), Kartal, B. (author), Op den Camp, H.J.M. (author), Dutilh, B.E. (author), Jetten, M.S.M. (author)We present the draft genome of anammox bacterium “Candidatus Scalindua brodae,” which at 282 contigs is a major improvement over the highly fragmented genome assembly of related species “Ca. Scalindua profunda” (1,580 contigs) which was previously published.journal article 2015
- document
-
Villanueva, L. (author), Speth, D.R. (author), Van Alen, T. (author), Hoischen, A. (author), Jetten, M.S. (author)Anaerobic ammonium oxidizing (anammox) bacteria are responsible for a significant portion of the loss of fixed nitrogen from the oceans, making them important players in the global nitrogen cycle. To date, marine anammox bacteria found in both water columns and sediments worldwide belong almost exclusively to "Candidatus Scalindua" species....journal article 2014
- document
-
Hu, Z. (author), Van Alen, T. (author), Jetten, M.S.M. (author), Kartal, B. (author)Anaerobic ammonium-oxidizing (anammox) planctomycetes oxidize ammonium in the absence of molecular oxygen with nitrite as the electron acceptor. Although planctomycetes are generally assumed to lack peptidoglycan in their cell walls, recent genome data imply that the anammox bacteria have the genes necessary to synthesize peptidoglycan-like cell...journal article 2013
- document
-
Hu, Z. (author), Lotti, T. (author), De Kreuk, B.M. (author), Kleerebezem, R. (author), Van Loosdrecht, M. (author), Kruit, J. (author), Jetten, M.S.M. (author), Kartala, B. (author)Currently, nitritation-anammox (anaerobic ammonium oxidation) bioreactors are designed to treat wastewaters with high ammonium concentrations at mesophilic temperatures (25 to 40°C). The implementation of this technology at ambient temperatures for nitrogen removal from municipal wastewater following carbon removal may lead to more-sustainable...journal article 2013
- document
-
Kartal, B. (author), De Almeida, N.M. (author), Maalcke, W.J. (author), Op den Camp, H.J.M. (author), Jetten, M.S.M. (author), Keltjens, J.T. (author)Anaerobic ammonium-oxidizing (anammox) bacteria primarily grow by the oxidation of ammonium coupled to nitrite reduction, using CO2 as the sole carbon source. Although they were neglected for a long time, anammox bacteria are encountered in an enormous species (micro)diversity in virtually any anoxic environment that contains fixed nitrogen. It...journal article 2013