PMID:
     12835416
Authors:
     Glockner FO, Kube M, Bauer M, Teeling H, Lombardot T, Ludwig W,
     Gade D, Beck A, Borzym K, Heitmann K, Rabus R, Schlesner H,
     Amann R, Reinhardt R.
Title:
     Complete genome sequence of the marine planctomycete Pirellula sp. strain 1.
Journal:
     Proc Natl Acad Sci U S A. 2003 Jul 8;100(14):8298-303. Epub 2003 Jun 30.
Abstract:
     Pirellula sp. strain 1 ("Rhodopirellula baltica") is a marine representative of
     the globally distributed and environmentally important bacterial order
     Planctomycetales. Here we report the complete genome sequence of a member of this
     independent phylum. With 7.145 megabases, Pirellula sp. strain 1 has the largest 
     circular bacterial genome sequenced so far. The presence of all genes required
     for heterolactic acid fermentation, key genes for the interconversion of C1
     compounds, and 110 sulfatases were unexpected for this aerobic heterotrophic
     isolate. Although Pirellula sp. strain 1 has a proteinaceous cell wall, remnants 
     of genes for peptidoglycan synthesis were found. Genes for lipid A biosynthesis
     and homologues to the flagellar L- and P-ring protein indicate a former
     Gram-negative type of cell wall. Phylogenetic analysis of all relevant markers
     clearly affiliates the Planctomycetales to the domain Bacteria as a distinct
     phylum, but a deepest branching is not supported by our analyses.

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