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Cell division ring, a new cell division protein and vertical inheritance of a bacterial organelle in anammox planctomycetes
Author(s) -
Van Niftrik Laura,
Geerts Willie J. C.,
Van Donselaar Elly G.,
Humbel Bruno M.,
Webb Richard I.,
Harhangi Harry R.,
Camp Huub J. M. Op den,
Fuerst John A.,
Verkleij Arie J.,
Jetten Mike S. M.,
Strous Marc
Publication year - 2009
Publication title -
molecular microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.857
H-Index - 247
eISSN - 1365-2958
pISSN - 0950-382X
DOI - 10.1111/j.1365-2958.2009.06841.x
Subject(s) - ftsz , anammox , biology , cell division , planctomycetes , organelle , microbiology and biotechnology , cell , bacteria , genetics , proteobacteria , chemistry , 16s ribosomal rna , denitrifying bacteria , organic chemistry , nitrogen , denitrification
Summary Anammox bacteria are members of the phylum Planctomycetes that oxidize ammonium anaerobically and produce a significant part of the atmosphere's dinitrogen gas. They contain a unique bacterial organelle, the anammoxosome, which is the locus of anammox catabolism. While studying anammox cell and anammoxosome division with transmission electron microscopy including electron tomography, we observed a cell division ring in the outermost compartment of dividing anammox cells. In most Bacteria, GTP hydrolysis drives the tubulin‐analogue FtsZ to assemble into a ring‐like structure at the cell division site where it functions as a scaffold for the molecular machinery that performs cell division. However, the genome of the anammox bacterium ‘ Candidatus Kuenenia stuttgartiensis’ does not encode ftsZ . Genomic analysis of open reading frames with potential GTPase activity indicated a possible novel cell division ring gene: kustd1438, which was unrelated to ftsZ . Immunogold localization specifically localized kustd1438 to the cell division ring. Genomic analyses of other members of the phyla Planctomycetes and Chlamydiae revealed no putative functional homologues of kustd1438, suggesting that it is specific to anammox bacteria. Electron tomography also revealed that the bacterial organelle was elongated along with the rest of the cell and divided equally among daughter cells during the cell division process.