From The Origin of Species to the origin of bacterial flagella

@article{Pallen2006FromTO,
  title={From The Origin of Species to the origin of bacterial flagella},
  author={M. Pallen and N. Matzke},
  journal={Nature Reviews Microbiology},
  year={2006},
  volume={4},
  pages={784-790}
}
In the recent Dover trial, and elsewhere, the 'Intelligent Design' movement has championed the bacterial flagellum as an irreducibly complex system that, it is claimed, could not have evolved through natural selection. Here we explore the arguments in favour of viewing bacterial flagella as evolved, rather than designed, entities. We dismiss the need for any great conceptual leaps in creating a model of flagellar evolution and speculate as to how an experimental programme focused on this topic… Expand

Tables and Topics from this paper

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Proponents of the intelligent design (ID) explanation for how organisms developed claim that the bacterial flagellum (BF) is irreducibly complex. They argue that this structure is so complicated thatExpand
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Structural differences in the bacterial flagellar motor among bacterial species
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References

SHOWING 1-10 OF 87 REFERENCES
Variation in bacterial flagellins: from sequence to structure.
TLDR
The sequences that mediate filament assembly show remarkable conservation, which indicates that all bacterial flagellins are likely to pack into filaments in a similar manner. Expand
Bacterial flagellar diversity in the post-genomic era.
TLDR
Homology searches were used to determine how far the E. coli/S. Expand
Prokaryotic motility structures.
TLDR
Research on the bacterial flagellum has greatly aided the authors' understanding of not only motility but also protein secretion and genetic regulation systems, and continued study and understanding of all prokaryotic motility structures will provide a wealth of knowledge that is sure to extend beyond the bounds of proKaryotic movement. Expand
Spirochete periplasmic flagella and motility.
TLDR
To better understand spirochete motility on a more molecular level, the proteins and genes involved in motility are being analyzed and unique aspects have already become evident. Expand
Bioinformatics, genomics and evolution of non-flagellar type-III secretion systems: a Darwinian perspective.
We review the biology of non-flagellar type-III secretion systems from a Darwinian perspective, highlighting the themes of evolution, conservation, variation and decay. The presence of these systemsExpand
Flagellar filaments of the deep-sea bacteria Idiomarina loihiensis belong to a family different from those of Salmonella typhimurium.
TLDR
Analysis of the polymorphic forms under different pH conditions showed that the Curly-like filaments in the marine bacteria Idiomarina loihiensis are actually Normal filaments having a smaller pitch and diameter than those of Salmonella typhimurium. Expand
Flagellar glycosylation - a new component of the motility repertoire?
  • S. Logan
  • Biology, Medicine
  • Microbiology
  • 2006
TLDR
This review focuses on the structural diversity in flagellar glycosylation systems and demonstrates that as a consequence of the unique assembly processes, the type of glycosidic linkage found on archaeal and bacterialflagellins is distinctive. Expand
Characterization of the fliL gene in the flagellar regulon of Escherichia coli and Salmonella typhimurium
TLDR
FliL does not appear to have a major role in flagellar structure or function and is therefore unlikely to be a component of the motor or switch; the effect on motility caused by truncation of the gene is probably an indirect one. Expand
Type III flagellar protein export and flagellar assembly
Bacterial flagella, unlike eukaryotic flagella, are largely external to the cell and therefore many of their subunits have to be exported. Export is ATP-driven. In Salmonella, the bacterium on whichExpand
Diversity in Chemotaxis Mechanisms among the Bacteria and Archaea
TLDR
The Bacillus subtilis chemotaxis system is considerably more complex and appears to be similar to the one that existed when the bacteria and archaea separated during evolution, so that understanding this mechanism should provide insight into the variety of mechanisms used today by the broad sweep of chemotactic bacteria and Archaea. Expand
...
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