scholarly journals Novel prosthecate bacteria from the candidate phylum Acetothermia

2018 ◽  
Vol 12 (9) ◽  
pp. 2225-2237 ◽  
Author(s):  
Liping Hao ◽  
Simon Jon McIlroy ◽  
Rasmus Hansen Kirkegaard ◽  
Søren Michael Karst ◽  
Warnakulasuriya Eustace Yrosh Fernando ◽  
...  
Keyword(s):  
Prosthecate Bacteria

Prosthecate Bacteria

1971 ◽  
Vol 25 (1) ◽  
pp. 93-110 ◽  
Author(s):  
J M Schmidt
Keyword(s):  
Prosthecate Bacteria

scholarly journals Comparative Genomic Evidence for a Close Relationship between the Dimorphic Prosthecate Bacteria Hyphomonas neptunium and Caulobacter crescentus

2006 ◽  
Vol 188 (19) ◽  
pp. 6841-6850 ◽  
Author(s):  
Jonathan H. Badger ◽  
Timothy R. Hoover ◽  
Yves V. Brun ◽  
Ronald M. Weiner ◽  
Michael T. Laub ◽  
...  
Keyword(s):  
Genome Sequence ◽  
Caulobacter Crescentus ◽  
Cell Aging ◽  
Comparative Genomic ◽  
Random Dispersal ◽  
Dispersal Mechanism ◽  
Wide Range ◽  
Close Relationship ◽  
Rrna Phylogeny ◽  
Prosthecate Bacteria

ABSTRACT The dimorphic prosthecate bacteria (DPB) are α-proteobacteria that reproduce in an asymmetric manner rather than by binary fission and are of interest as simple models of development. Prior to this work, the only member of this group for which genome sequence was available was the model freshwater organism Caulobacter crescentus. Here we describe the genome sequence of Hyphomonas neptunium, a marine member of the DPB that differs from C. crescentus in that H. neptunium uses its stalk as a reproductive structure. Genome analysis indicates that this organism shares more genes with C. crescentus than it does with Silicibacter pomeroyi (a closer relative according to 16S rRNA phylogeny), that it relies upon a heterotrophic strategy utilizing a wide range of substrates, that its cell cycle is likely to be regulated in a similar manner to that of C. crescentus, and that the outer membrane complements of H. neptunium and C. crescentus are remarkably similar. H. neptunium swarmer cells are highly motile via a single polar flagellum. With the exception of cheY and cheR, genes required for chemotaxis were absent in the H. neptunium genome. Consistent with this observation, H. neptunium swarmer cells did not respond to any chemotactic stimuli that were tested, which suggests that H. neptunium motility is a random dispersal mechanism for swarmer cells rather than a stimulus-controlled navigation system for locating specific environments. In addition to providing insights into bacterial development, the H. neptunium genome will provide an important resource for the study of other interesting biological processes including chromosome segregation, polar growth, and cell aging.

Speculations on the growth strategy of prosthecate bacteria

1988 ◽  
Vol 34 (4) ◽  
pp. 390-394 ◽  
Author(s):  
Arthur L. Koch
Keyword(s):  
Cell Wall ◽  
Basal Body ◽  
Growth Strategy ◽  
Experimental Proof ◽  
Daughter Cells ◽  
Constant Diameter ◽  
Prosthecate Bacteria

Appendaged bacteria with stalks that are extensions of the cell wall have had to solve the problems of growing the stalk as a tube of constant diameter and of partitioning their chromosomes into the asymmetric daughter cells. Although no experimental proof is given, it is suggested that both processes depend on the attachment of the chromosome origin and terminus to the wall at special terminal sites that contain the basal body (motor assembly) for flagellar motion.

scholarly journals Brevundimonas halotolerans sp. nov., Brevundimonas poindexterae sp. nov. and Brevundimonas staleyi sp. nov., prosthecate bacteria from aquatic habitats

2010 ◽  
Vol 60 (8) ◽  
pp. 1837-1843 ◽  
Author(s):  
Wolf-Rainer Abraham ◽  
Andréia B. Estrela ◽  
Dennis I. Nikitin ◽  
John Smit ◽  
Marc Vancanneyt
Keyword(s):  
Type Strain ◽  
Novel Species ◽  
Rrna Gene ◽  
Aquatic Habitats ◽  
16S Rrna Gene Sequences ◽  
Biochemical Tests ◽  
Phenotypic Differentiation ◽  
Gram Negative ◽  
Prosthecate Bacteria ◽  
Physiological And Biochemical

Eight strains of Gram-negative, bacteroid-shaped, prosthecate bacteria, isolated from brackish water (MCS24T, MCS17 and MCS35), the marine environment (CM260, CM272 and CM282) and activated sludge (FWC40T and FWC43T), were characterized using a polyphasic approach. Analysis of 16S rRNA gene sequences determined that all strains were affiliated to the alphaproteobacterial genus Brevundimonas, forming three distinct phyletic lineages within the genus. The strains grew best with 5–30 g NaCl l−1 at 20–30 °C. DNA G+C contents for strains MCS24T, FWC40T and FWC43T were between 65 and 67 mol%, in accordance with values reported previously for other species of the genus. Moreover, chemotaxonomic data and physiological and biochemical tests allowed the phenotypic differentiation of three novel species within the genus Brevundimonas, for which the names Brevundimonas halotolerans sp. nov. (type strain MCS24T =LMG 25346T =CCUG 58273T), Brevundimonas poindexterae sp. nov. (type strain FWC40T =LMG 25261T =CCUG 57883T) and Brevundimonas staleyi sp. nov. (type strain FWC43T =LMG 25262T =CCUG 57884T) are proposed.

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