The PVC superphylum: exceptions to the bacterial definition?

Fuerst, John A. (2013) The PVC superphylum: exceptions to the bacterial definition?. Antonie van Leeuwenhoek, 104 4: 451-466. doi:10.1007/s10482-013-9986-1

Author Fuerst, John A.
Title The PVC superphylum: exceptions to the bacterial definition?
Journal name Antonie van Leeuwenhoek   Check publisher's open access policy
ISSN 0003-6072
Publication date 2013-10
Year available 2013
Sub-type Article (original research)
DOI 10.1007/s10482-013-9986-1
Volume 104
Issue 4
Start page 451
End page 466
Total pages 16
Place of publication Dordrecht, Netherlands
Publisher Springer
Collection year 2014
Language eng
Formatted abstract
The PVC superphylum is a grouping of distinct phyla of the domain bacteria proposed initially on the basis of 16S rRNA gene sequence analysis. It consists of a core of phyla Planctomycetes, Verrucomicrobia and Chlamydiae, but several other phyla have been considered to be members, including phylum Lentisphaerae and several other phyla consisting only of yet-to-be cultured members. The genomics-based links between Planctomycetes, Verrucomicrobia and Chlamydiae have been recently strengthened, but there appear to be other features which may confirm the relationship at least of Planctomycetes, Verrucomicrobia and Lentisphaerae. Remarkably these include the unique planctomycetal compartmentalized cell plan differing from the cell organization typical for bacteria. Such a shared cell plan suggests that the common ancestor of the PVC superphylum members may also have been compartmentalized, suggesting this is an evolutionarily homologous feature at least within the superphylum. Both the PVC endomembranes and the eukaryote-homologous membrane-coating MC proteins linked to endocytosis ability in Gemmata obscuriglobus and shared by PVC members suggest such homology may extend beyond the bacteria to the Eukarya. If so, either our definition of bacteria may have to change or PVC members admitted to be exceptions. The cases for and against considering the PVC superphylum members as exceptions to the bacteria are discussed, and arguments for them as exceptions presented. Recent critical analysis has favoured convergence and analogy for explaining eukaryote-like features in planctomycetes and other PVC organisms. The case is made for constructing hypotheses leaving the possibility of homology and evolutionary links to eukaryote features open. As the case of discovery of endocytosis-like protein uptake in planctomycetes has suggested, this may prove a strong basis for the immediate future of experimental research programs in the PVC scientific community.
Keyword PVC superphylum
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Chemistry and Molecular Biosciences
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Citation counts: TR Web of Science Citation Count  Cited 15 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 16 times in Scopus Article | Citations
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Created: Fri, 09 Aug 2013, 11:31:05 EST by Mrs Louise Nimwegen on behalf of School of Chemistry & Molecular Biosciences