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Anammox Planctomycetes have a peptidoglycan cell wall
Umeå University, Faculty of Medicine, Department of Molecular Biology (Faculty of Medicine). Umeå University, Faculty of Medicine, Molecular Infection Medicine Sweden (MIMS).
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2015 (English)In: Nature Communications, ISSN 2041-1723, Vol. 6, 6878Article in journal (Refereed) Published
Abstract [en]

Planctomycetes are intriguing microorganisms that apparently lack peptidoglycan, a structure that controls the shape and integrity of almost all bacterial cells. Therefore, the planctomycetal cell envelope is considered exceptional and their cell plan uniquely compartmentalized. Anaerobic ammonium-oxidizing (anammox) Planctomycetes play a key role in the global nitrogen cycle by releasing fixed nitrogen back to the atmosphere as N-2. Here using a complementary array of state-of-the-art techniques including continuous culturing, cryo-transmission electron microscopy, peptidoglycan-specific probes and muropeptide analysis, we show that the anammox bacterium Kuenenia stuttgartiensis contains peptidoglycan. On the basis of the thickness, composition and location of peptidoglycan in K. stuttgartiensis, we propose to redefine Planctomycetes as Gram-negative bacteria. Our results demonstrate that Planctomycetes are not an exception to the universal presence of peptidoglycan in bacteria.

Place, publisher, year, edition, pages
2015. Vol. 6, 6878
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URN: urn:nbn:se:umu:diva-106512DOI: 10.1038/ncomms7878ISI: 000355526200001PubMedID: 25962786OAI: diva2:841922
Available from: 2015-07-15 Created: 2015-07-14 Last updated: 2015-07-15Bibliographically approved

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Espaillat, AkbarCava, Felipe
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