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Nitrosopumilus

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Nitrosopumilusis agenusofarchaea.The type species,Nitrosopumilus maritimus,is an extremely commonarchaeonliving in seawater. It is the first member of the Group 1aNitrososphaerota(formerly Thaumarchaeota) to be isolated in pure culture. Gene sequences suggest that the Group 1a Nitrososphaerota are ubiquitous with the oligotrophic surface ocean and can be found in most non-coastal marine waters around the planet.[1]It is one of thesmallest living organismsat 0.2 micrometers in diameter. Cells in the speciesN. maritimusare shaped like peanuts and can be found both as individuals and in loose aggregates.[2]They oxidizeammoniatonitriteand members ofN. maritimuscan oxidize ammonia at levels as low as 10 nanomolar, near the limit to sustain its life.[3]Archaea in the speciesN. maritimuslive in oxygen-depleted habitats. Oxygen needed for ammonia oxidation might be produced by novel pathway which generates oxygen and dinitrogen.[4]N. maritimusis thus among organisms which are able to produce oxygen in dark.

Nitrosopumilus
Nitrosopumilus maritimus,partially with virions of Nitrosopumilus spindle-shaped virus 1 (Thaspiviridae) attached.
Scientific classification
Domain:
Archaea
Phylum:
Nitrososphaerota
Class:
Nitrososphaeria
Order:
Nitrosopumilales
Family:
Nitrosopumilaceae
Genus:
Nitrosopumilus

Qin et al. 2017
Type species
Nitrosopumilus maritimus
Qin et al. 2017
Species
Synonyms
  • "Ca.Nitrosopumilus "Konnekeet al.2005
  • "Ca.Nitrosomarinus"Ahlgren et al. 2017

This organism was isolated from sediment in a tropical tank at theSeattle Aquariumby a group led byDavid Stahl(University of Washington).[5]

Biology

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Lipid membranes

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Populations ofN. maritimusare probably the main source ofglycerol dialkyl glycerol tetraethers(GDGTs) in the ocean, a compound which constitutes their monolayer lipidiccell membranesasintact polar lipids (IPLs)[6]together withcrenarcheol.[7]This membrane structure is thought to maximiseproton motive force.[6]The compounds found in the membrane of these organisms, such as GDGTs, IPLs, and crenarcheol, can be useful asbiomarkersfor the presence of organisms belonging to theNitrososphaerotagroup in the water column.[6]These archaea have also been found to change their membrane's composition in relation to temperature (by GDGT cyclization), growth,[8]metabolic status,[9]and, even if less dramatically, topH.[6]

Cell division

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All known Archaea usecell divisionto duplicate.EuryarchaeotaandBacteriause theFtsZmechanism incell division,whileThermoproteotadivide using the Cdv machinery. However,Nitrososphaerotasuch asN. maritimusadopts both mechanisms,FtsZand Cdv. Nevertheless, after further researches,N. maritimuswas found to use mainly Cdv proteins rather thanFtsZduringcell division.In this case, Cdv is the primary system incell divisionforN. maritimus.[10][11]Therefore, to replicate agenomeof 1.645Mb,N. maritimusspends 15 to 18 hours.[12]

Physiology

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Genome

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Ammonia-oxidizing bacteria (AOB)are known to have chemolithoautotrophic growth by using inorganic carbon,N. maritimus,an Ammonia-oxidizing archaea (AOA) use a similar process of growth. While AOB usesCalvin–Bassham–Benson cyclewith theCO2-fi xing enzyme ribulose bisphosphate carboxylase/oxygenase (RubisCO) as the key enzyme;N. maritimusseems to grow and use an alternative pathway due to the lack of genes and enzymes. Therefore, a variant of the3-hydroxypropionate/4-hydroxybutyrate is used byN. maritimusto develop autotrophically, which allows its capacity to assimilate inorganic carbon.[13]Using the3-hydroxypropionate/4-hydroxybutyrate pathway method instead of theCalvin cycle,N. maritimuscould provide a growth advantage as the process is more energy-efficient. Due to its originality,N. maritimusplays an essential role in the carbon and nitrogen cycle[14]

Ammonia oxidation

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The isolation and the sequencing ofN. maritimuss genome have allowed to extend the insight into thephysiologyof the organisms belonging to theNitrososphaerotagroup.N. maritimuswas the firstArchaeonwith anammonia oxidizing metabolismto be studied. This organism is common in the marine environment especially at the bottom of thephotic zonewhere the amount of Ammonium and Iron is enough to support its growth.[15]The physiology ofN. maritimusremains unclear under certain aspects. It conserves energy for its vital functions, from theoxidationofAmmonia(NH
3) and thereductionofOxygen(O2), with the formation ofNitrite.CO2is the carbon source. It is fixed and assimilated by the microorganism through the3-hydroxypropinate/4-hydroxybutyrate carbon cycle.[16]

N. maritimuscarries out the first step ofNitrification,by acting in a key role in theNitrogen cyclealong the water column. Since this oxidizing reaction releases just a little amount of energy, the growth of this microorganism is slow.N. maritimus’s genome includes the amoA gene, encoding for theAmmonia Monooxygenase(AMO) enzyme. This latter allows the oxidation of ammonia to hydroxylamine (NH
2OH). Instead, the genome lacks the gene encoding forHydroxylamine Oxidoreductase(HAO) responsible for oxidizing theintermediate(NH
2OH) to nitrite. The hydroxylamine is produced as ametabolite,and it is immediately consumed during the metabolic reaction. Other intermediates produced during this metabolic pathway are: the nitric oxide (NO), thenitrous oxide(N
2O), the nitoxyl (HNO). These are toxic at high concentration. The enzyme responsible for oxidizing the hydroxylamine to nitrite is not well-known yet.[17]

Two hypotheses are suggested for the metabolic pathway ofN. maritimusthat involve two types ofenzymes:the copper-based enzyme (Cu-ME) and the nitrite reductase enzyme (nirK) and its reverse:[18]

  • In the first one ammonia is oxidized through AMO forming the hydroxylamine; the latter, plus a molecule of nitric oxide, are, in turn, oxidized by a copper-based enzyme (Cu-ME) producing two molecules of nitrite. One of these is reduced to NO by the nitrite reductase (nirK) and goes back to the cu-ME enzyme. An electrons translocation occurs producing a Proton Motive Force (PMF) and allowingATP synthesis.
  • In the second one ammonia is oxidized through AMO making up the hydroxylamine and then the two enzymes, nirK and Cu-ME, oxidize the hydroxylamine to nitric oxide and this to nitrite. The proper roles and the order at which these enzymes work, have to be clarified.

TheS-layerofN. maritimusis found to form into multiple layers of channels that allowammonium(NH+
4) cations to flow through.[19]

Additionally,nitrous oxideis released by this type of metabolism. It is an importantgreenhouse gasthat likely is produced as result of abioticdenitrificationof metabolites.

Taxonomy

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The currently accepted taxonomy is based on theList of Prokaryotic names with Standing in Nomenclature(LPSN)[20]andNational Center for Biotechnology Information(NCBI)[21]

16S rRNA basedLTP_06_2022[22][23][24] 53 marker proteins basedGTDB08-RS214[25][26][27]
Nitrosopumilus

N. zosterae

"N. ureiphilus"

N. adriaticus

N. maritimus

N. piranensis

"N. cobalaminigenes"

"N. oxyclinae"

Nitrosopumilus

N. maritimusQin et al. 2017

"Ca.N. koreensis "Park et al. 2012

N. piranensisBayer et al. 2019

N. zosteraeNakagawa et al. 2021

N. adriaticusBayer et al. 2019

"N. ureiphilus"Qin et al. 2017

"Ca.N. salarius "corrig. Mosier et al. 2012

"Ca.N. catalinensis "(Ahlgren et al. 2017) Rinke et al. 2020

"Ca.N. limneticus "Klotz et al. 2022

"Ca.N. sediminis "Park et al. 2012

"N. cobalaminigenes"Qin et al. 2017

"N. oxyclinae"Qin et al. 2017

Ecology

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Habitats

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Characteristic of theNitrososphaerotaphylum,N. maritimus[28]is mainly found in oligotrophic (poor environment in nutrients) open ocean, within the Pelagic zone.[29]Initially discovered in Seattle, in an aquarium,[30]todayN. maritimuscan populate numerous environment such as the subtropical North Pacific and South Atlantic Ocean or the mesopelagic zone in the Pacific Ocean.[31]N. maritimusis an aerobic archeon able to grow even with an extremely low concentration of nutrients,[32]like in dark-deep open ocean, in whichN. maritimusas an important impact.[33]

Contributions

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Nitrification of the ocean

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Members of the speciesN. maritimuscan oxidize ammonia to form nitrite, which is the first step of thenitrogen cycle.Ammonia and nitrate are the two nutrients which form the inorganic pool of nitrogen. Populating poor environments (lacking of organic energy sources and sunlight), the oxidation of ammonia could contribute to primary productivity.[30]In fact, nitrate fuels half of the primary production of phytoplankton[34]but not only phytoplankton needs nitrate. The high ammonia's affinity allowsN. maritimusto largely compete with the other marine phototrophs and chemotrophs.[32]Regarding the ammonium turnover per unit biomass,N. maritimuswould be around 5 times higher than oligotrophic heterotrophs' turnover, and around 30 times higher than most of the oligotrophic diatoms known turnover.[32]Computing these two observations nitrification byN. maritimusplays a key role in the marine nitrogen cycle.[35]

Carbon and phosphorus implications

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Its ability to fix inorganic carbon via an alternative pathway (3-hydroxypropionate/4-hydroxybutyrate pathway)[29]allowsN. maritimusto participate efficiently in the flux of the global carbon budget.[33]Coupling with the ammonia-oxidizing pathway,N. maritimusand the other marine thaumarchaea, approximately, recycle 4.5% of the organic carbon mineralized in the oceans and transform 4.3% of detrital phosphorus into new phosphorus substances.[33]

See also

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References

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  1. ^Walker, C. B.; de la Torre, J. R.; Klotz, M. G.; Urakawa, H.; Pinel, N.; Arp, D. J.; Brochier-Armanet, C.; Chain, P. S. G.; Chan, P. P. (11 May 2010)."Nitrosopumilus maritimus genome reveals unique mechanisms for nitrification and autotrophy in globally distributed marine crenarchaea".Proceedings of the National Academy of Sciences of the United States of America.107(19): 8818–8823.Bibcode:2010PNAS..107.8818W.doi:10.1073/pnas.0913533107.ISSN1091-6490.PMC2889351.PMID20421470.
  2. ^Ko ̈nneke; Bernhard; de la Torre; Walker; Waterbury; Stahl (2005). "Isolation of an autotrophic ammonia-oxidizing marine archaeon".Nature.437(7058): 543–546.Bibcode:2005Natur.437..543K.doi:10.1038/nature03911.PMID16177789.S2CID4340386.
  3. ^http:// physorg /news173538255.htmlPlanet's nitrogen cycle overturned by 'tiny ammonia eater of the seas' Hannah Hickey 2009-09-30 originally based on a Nature publication by Willm Martens-Habbena, David Stahl
  4. ^Kraft, Beate; Jehmlich, Nico; Larsen, Morten; Bristow, Laura A.; Könneke, Martin; Thamdrup, Bo; Canfield, Donald E. (7 January 2022)."Oxygen and nitrogen production by an ammonia-oxidizing archaeon".Science.375(6576): 97–100.doi:10.1126/science.abe6733.ISSN0036-8075.
  5. ^Könneke, Martin; Bernhard, Anne E.; de la Torre, José R.; Walker, Christopher B.; Waterbury, John B.; Stahl, David A. (22 September 2005). "Isolation of an autotrophic ammonia-oxidizing marine archaeon".Nature.437(7058): 543–546.Bibcode:2005Natur.437..543K.doi:10.1038/nature03911.PMID16177789.S2CID4340386.
  6. ^abcdElling, Felix J.; Ko ̈nneke, Martin; Mußmann, Marc; Greve, Andreas; Hinrichs, Kai-Uwe (2015). "Influence of temperature, pH, and salinity on membrane lipid composition and TEX86 of marine planktonic thaumarchaeal isolates".Geochimica et Cosmochimica Acta.171:238.Bibcode:2015GeCoA.171..238E.doi:10.1016/j.gca.2015.09.004.
  7. ^Schouten, Stefan; Hopmans, Ellen C.; Baas, Marianne; Boumann, Henry; Standfest, Sonja; Ko ̈nneke, Martin; Stahl, David A.; Sinninghe Damste, Jaap S. (2008)."Intact Membrane Lipids of"CandidatusNitrosopumilus maritimus, "a Cultivated Representative of the Cosmopolitan Mesophilic Group I Crenarchaeota".Applied and Environmental Microbiology.74(8): 2433–2440.Bibcode:2008ApEnM..74.2433S.doi:10.1128/AEM.01709-07.PMC2293165.PMID18296531.S2CID25945482.
  8. ^Elling; Ko ̈nneke; Lipp; Becker; Gagen; Hinrichs (2014). "Effects of growth phase on the membrane lipid composition of the thaumarchaeon Nitrosopumilus maritimus and their implications for archaeal lipid distributions in the marine environment".Geochimica et Cosmochimica Acta.141:579.Bibcode:2014GeCoA.141..579E.doi:10.1016/j.gca.2014.07.005.
  9. ^Huguet; Urakawa; Martens-Habbena; Truxal; Stahl; Ingalls (2009). "Intact Membrane Lipids of"CandidatusNitrosopumilus maritimus, "a Cultivated Representative of the Cosmopolitan Mesophilic Group I Crenarchaeota".Organic Geochemistry.41:930–934.doi:10.1016/j.orggeochem.2010.04.012.
  10. ^Ng, Kian-Hong, Vinayaka Srinivas, Ramanujam Srinivasan, and Mohan Balasubramanian. ‘The Nitrosopumilus Maritimus CdvB, but Not FtsZ, Assembles into Polymers’. Archaea 2013 (2013): 1–10.https://doi.org/10.1155/2013/104147.
  11. ^Mosier, Annika C., Eric E. Allen, Maria Kim, Steven Ferriera, and Christopher A. Francis. ‘Genome Sequence of "Candidatus Nitrosopumilus Salaria" BD31, an Ammonia-Oxidizing Archaeon from the San Francisco Bay Estuary’. Journal of Bacteriology 194, no. 8 (15 April 2012): 2121–22.https://doi.org/10.1128/JB.00013-12.
  12. ^Pelve, Erik A., Ann-Christin Lindås, Willm Martens-Habbena, José R. de la Torre, David A. Stahl, and Rolf Bernander. ‘Cdv-Based Cell Division and Cell Cycle Organization in the ThaumarchaeonNitrosopumilus maritimus:Cdv-Based Cell Division in N. Maritimus’. Molecular Microbiology 82, no. 3 (November 2011): 555–66.https://doi.org/10.1111/j.1365-2958.2011.07834.x.
  13. ^Berg, Ivan A., Daniel Kockelkorn, Wolfgang Buckel, and Georg Fuchs. ‘A 3-Hydroxypropionate/4-Hydroxybutyrate Autotrophic Carbon Dioxide Assimilation Pathway in Archaea’. Science 318, no. 5857 (14 December 2007): 1782–86.https://doi.org/10.1126/science.1149976.
  14. ^Walker, C. B., J. R. de la Torre, M. G. Klotz, H. Urakawa, N. Pinel, D. J. Arp, C. Brochier-Armanet, et al. ‘Nitrosopumilus Maritimus Genome Reveals Unique Mechanisms for Nitrification and Autotrophy in Globally Distributed Marine Crenarchaea’. Proceedings of the National Academy of Sciences 107, no. 19 (11 May 2010): 8818–23.
  15. ^The ISME Journal (2019) 13:2295–2305 https://doi.org/10.1038/s41396-019-0434-8
  16. ^Madigan, Michael T., 1949- Brock biology of microorganisms / Michael T. Madigan... [et al.]. — Fourteenth edition. pages cm Includes index. ISBN 978-0-321-89739-8 1. Microbiology. I. Title. QR41.2.B77 2015 579–dc23
  17. ^Hydroxylamine as an intermediate in ammonia oxidation by globally abundant marine archaea Neeraja Vajralaa,1, Willm Martens-Habbenab,1, Luis A. Sayavedra-Sotoa , Andrew Schauerc , Peter J. Bottomleyd , David A. Stahlb , and Daniel J. Arpa,2 Departments of a Botany and Plant Pathology and d Microbiology, Oregon State University, Corvallis, OR 97331; and Departments of b Civil and Environmental Engineering and c Earth and Space Science, University of Washington, Seattle, WA 98195 Edited by Edward F. DeLong, Massachusetts Institute of Technology, Cambridge, MA, and approved December 7, 2012 (received for review August 17, 2012)
  18. ^Current Opinion in Chemical Biology 2019, 49:9–15 This review comes from a themed issue on Bioinorganic chemistry Edited by Kyle M Lancaster For a complete overview see the Issue and the Editorial Available online 17 September 2018 https://doi.org/10.1016/j.cbpa.2018.09.003 1367-5931/ã 2018 Elsevier Ltd. All rights reserved.
  19. ^von Kügelgen, Andriko; Cassidy, C. Keith; van Dorst, Sofie; Pagani, Lennart L.; Batters, Christopher; Ford, Zephyr; Löwe, Jan; Alva, Vikram; Stansfeld, Phillip J.; Bharat, Tanmay A. M. (6 June 2024)."Membraneless channels sieve cations in ammonia-oxidizing marine archaea".Nature.630(8015): 230–236.doi:10.1038/s41586-024-07462-5.PMC11153153.
  20. ^J.P. Euzéby; et al. (1997)."Nitrosopumilus".List of Prokaryotic names with Standing in Nomenclature(LPSN).Retrieved20 March2021.
  21. ^Sayers; et al."Nitrosopumilus".National Center for Biotechnology Information(NCBI) taxonomy database.Retrieved20 March2021.
  22. ^"The LTP".Retrieved10 May2023.
  23. ^"LTP_all tree in newick format".Retrieved10 May2023.
  24. ^"LTP_06_2022 Release Notes"(PDF).Retrieved10 May2023.
  25. ^"GTDB release 08-RS214".Genome Taxonomy Database.Retrieved10 May2023.
  26. ^"ar53_r214.sp_label".Genome Taxonomy Database.Retrieved10 May2023.
  27. ^"Taxon History".Genome Taxonomy Database.Retrieved10 May2023.
  28. ^Brochier-Armanet, Céline, Bastien Boussau, Simonetta Gribaldo, and Patrick Forterre. "Mesophilic Crenarchaeota: Proposal for a Third Archaeal Phylum, the Thaumarchaeota." Nature Reviews Microbiology 6, no. 3 (March 2008): 245–52.https://doi.org/10.1038/nrmicro1852.
  29. ^abWalker, C. B., J. R. de la Torre, M. G. Klotz, H. Urakawa, N. Pinel, D. J. Arp, C. Brochier-Armanet, et al. "Nitrosopumilus Maritimus Genome Reveals Unique Mechanisms for Nitrification and Autotrophy in Globally Distributed Marine Crenarchaea." Proceedings of the National Academy of Sciences of the United States of America 107, no. 19 (May 11, 2010): 8818–23.https://doi.org/10.1073/pnas.0913533107.
  30. ^abKönneke, Martin, Anne E. Bernhard, José R. de la Torre, Christopher B. Walker, John B. Waterbury, and David A. Stahl. "Isolation of an Autotrophic Ammonia-Oxidizing Marine Archaeon." Nature 437, no. 7058 (September 2005): 543–46.https://doi.org/10.1038/nature03911.
  31. ^Karner, Markus B., Edward F. DeLong, and David M. Karl. "Archaeal Dominance in the Mesopelagic Zone of the Pacific Ocean." Nature 409, no. 6819 (January 2001): 507–10.https://doi.org/10.1038/35054051.
  32. ^abcMartens-Habbena, Willm, Paul M. Berube, Hidetoshi Urakawa, José R. de la Torre, and David A. Stahl. "Ammonia Oxidation Kinetics Determine Niche Separation of Nitrifying Archaea and Bacteria." Nature 461, no. 7266 (October 2009): 976–79.
  33. ^abcMeador, Travis B., Niels Schoffelen, Timothy G. Ferdelman, Osmond Rebello, Alexander Khachikyan, and Martin Könneke. "Carbon Recycling Efficiency and Phosphate Turnover by Marine Nitrifying Archaea." Science Advances 6, no. 19 (May 8, 2020): eaba1799.https://doi.org/10.1126/sciadv.aba1799.
  34. ^Yool, Andrew, Adrian P. Martin, Camila Fernández, and Darren R. Clark. "The Significance of Nitrification for Oceanic New Production." Nature 447, no. 7147 (June 2007): 999–1002.https://doi.org/10.1038/nature05885.
  35. ^Wuchter, Cornelia, Ben Abbas, Marco J. L. Coolen, Lydie Herfort, Judith van Bleijswijk, Peer Timmers, Marc Strous, et al. "Archaeal Nitrification in the Ocean." Proceedings of the National Academy of Sciences of the United States of America 103, no. 33 (August 15, 2006): 12317–22.https://doi.org/10.1073/pnas.0600756103.

Further reading

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