Planctomycetes do possess a peptidoglycan cell wall

Olga Jeske, Margarete Schüler, Peter Schumann, Alexander Schneider, Christian Boedeker, Mareike Jogler, Daniel Bollschweiler, Manfred Rohde, Christoph Mayer, Harald Engelhardt, Stefan Spring and Christian Jogler ()
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Olga Jeske: Independent Junior Research Group Microbial Cell Biology and Genetics, Leibniz Institute-DSMZ
Margarete Schüler: Max-Planck-Institute for Biochemistry
Peter Schumann: Leibniz Institute-DSMZ
Alexander Schneider: University of Tübingen
Christian Boedeker: Independent Junior Research Group Microbial Cell Biology and Genetics, Leibniz Institute-DSMZ
Mareike Jogler: Independent Junior Research Group Microbial Cell Biology and Genetics, Leibniz Institute-DSMZ
Daniel Bollschweiler: Max-Planck-Institute for Biochemistry
Manfred Rohde: Research Group Molecular Mechanisms of Streptococci, Helmholtz Center for Infection Research GmbH
Christoph Mayer: University of Tübingen
Harald Engelhardt: Max-Planck-Institute for Biochemistry
Stefan Spring: Leibniz Institute-DSMZ
Christian Jogler: Independent Junior Research Group Microbial Cell Biology and Genetics, Leibniz Institute-DSMZ

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract Most bacteria contain a peptidoglycan (PG) cell wall, which is critical for maintenance of shape and important for cell division. In contrast, Planctomycetes have been proposed to produce a proteinaceous cell wall devoid of PG. The apparent absence of PG has been used as an argument for the putative planctomycetal ancestry of all bacterial lineages. Here we show, employing multiple bioinformatic methods, that planctomycetal genomes encode proteins required for PG synthesis. Furthermore, we biochemically demonstrate the presence of the sugar and the peptide components of PG in Planctomycetes. In addition, light and electron microscopic experiments reveal planctomycetal PG sacculi that are susceptible to lysozyme treatment. Finally, cryo-electron tomography demonstrates that Planctomycetes possess a typical PG cell wall and that their cellular architecture is thus more similar to that of other Gram-negative bacteria. Our findings shed new light on the cellular architecture and cell division of the maverick Planctomycetes.

Date: 2015
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DOI: 10.1038/ncomms8116

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