Branching order of bacterial phyla (Gupta, 2001)

From Wikipedia, the free encyclopedia
Jump to: navigation, search

There are several models of the Branching order of bacterial phyla, one of these was proposed in 2001 by Gupta based on conserved indels or protein, termed "protein signatures", an alternative approach to molecular phylogeny.[1] Some problematic exceptions and conflicts are present to these conserved indels, however, they are in agreement with several groupings of classes and phyla.[1] One feature of the cladogram obtained with this method is the clustering of cell wall morphology (with some exceptions) from monoderms to transitional diderms to traditional diderms.[2]

In the cladogram below, yellow=pseudopeptidoglycan monoderms (Gram variable), red=thick peptidoglycan monoderms (Gram positive), blue=thin peptidoglycan diderms (Gram negative), green=atypical, see note in parethesis).






 Deinococcus-Thermus group (thick pept. diderms) 

 Chloroflexi (thin pept. monoderms) 



FCB group






PVC group

 Planctomycetes (pirellusome enclosed nucleoid) 

 Verrucomicrobia (compartmentalisation) 









See also[edit]


  1. ^ a b Gupta, R. (2001). "The branching order and phylogenetic placement of species from completed bacterial genomes, based on conserved indels found in various proteins". International Microbiology. 4 (4): 187–202. PMID 12051562. doi:10.1007/s10123-001-0037-9. 
  2. ^ Gupta, R. S. (2011). "Origin of diderm (Gram-negative) bacteria: Antibiotic selection pressure rather than endosymbiosis likely led to the evolution of bacterial cells with two membranes". Antonie van Leeuwenhoek. 100 (2): 171–182. PMC 3133647Freely accessible. PMID 21717204. doi:10.1007/s10482-011-9616-8.