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Structural Studies of Planctomycete Gemmata obscuriglobus Support Cell Compartmentalisation in a Bacterium
Members of phylum Planctomycetes have been proposed to possess atypical cell organisation for the Bacteria, having a structure of sectioned cells consistent with internal compartments surrounded by
Reclassification of the polyphyletic genus Prosthecomicrobium to form two novel genera, Vasilyevaea gen. nov. and Bauldia gen. nov. with four new combinations: Vasilyevaea enhydra comb. nov.,
The analyses indicate that some Prosthecomicrobium species are more closely related to non-prosthecate genera, including Devosia, Labrenzia, Blastochloris, Methylosinus, Mesorhizobium and Kaistia, than they are to other species of the genus Prosthesia.
A new microfungal isolate, Embellisia sp., associated with the Antarctic moss Bryum argenteum
A microfungal isolate of Embellisia sp2, not previously described from the Antarctic, has been identified by morphological means and internal transcribed spacer (ITS) region sequencing.
A canonical FtsZ protein in Verrucomicrobium spinosum, a member of the Bacterial phylum Verrucomicrobia that also includes tubulin-producing Prosthecobacter species
Both bacteria-like FtsZ and eukaryote-like tubulin cytoskeletal homologs occur in different species of the phylum Verrucomicrobia of domain Bacteria, a result with potential major implications for understanding evolution of tubulin-like cytoskeleton-dependent proteins and the origin of eUKaryote tubulins.
Tuwongella immobilis gen. nov., sp. nov., a novel non-motile bacterium within the phylum Planctomycetes
Based on discriminatory results from 16S rRNA gene sequence analysis, phenotypic, biochemical and chemotaxonomic analysis, MBLW1T should be considered as a new genus and species, for which the name Tuwongella immobilis gen. nov., sp.
Nuclear Pore-Like Structures in a Compartmentalized Bacterium
It is shown that pore-like structures occur in internal membranes of G.obscuriglobus and that they have elements structurally similar to eukaryote nuclear pores, including a basket, ring-spoke structure, and eight-fold rotational symmetry.
Electron tomography of the nucleoid of Gemmata obscuriglobus reveals complex liquid crystalline cholesteric structure
The nucleoid of the planctomycete Gemmata obscuriglobus is unique within the Bacteria in being both highly condensed and enclosed by a double-membrane nuclear envelope, seemingly analogous to the
Making heads or tails of the HU proteins in the planctomycete Gemmata obscuriglobus.
The genome of G. obscuriglobus is examined for the presence of proteins homologous to those that have been associated with nucleoid condensation, and two different HU homologues are found, one with an N-terminal and one with a C-Terminal extension relative to the amino acid sequence of the HU found in Escherichia coli.
Paralogization and New Protein Architectures in Planctomycetes Bacteria with Complex Cell Structures.
It is concluded that the many similarities between proteins in the Planctomycetales and the eukaryotes are due to convergent evolution and that there is no strict boundary between prokaryotes and eukARYotes with regard to features such as gene paralogy, protein length and protein domain composition patterns.
Evolutionary Remodelling of the Cell Envelope in Bacteria of the Planctomycetes Phylum.
Homologs of two highly abundant cysteine-rich cell wall proteins in T. immobilis were identified in all members of the Planctomycetales, whereas genes for peptidoglycan biosynthesis and cell elongation have been lost in many members of this bacterial group.