Prokaryotic Symbionts of Amoebae and Flagellates

Jeon, Kwang W.

doi:10.1007/0-387-30747-8_52

Cited by 2 publications

(2 citation statements)

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“…Bacteria that are able to enter amoeba cells (via phagocytosis or other entry mechanisms) but avoid subsequent digestion gain access to an attractive intracellular niche. A diverse collection of intracellular bacterial symbionts of amoebae has been found, some of which appear pathogenic, neutral, or beneficial for their amoeba host (DiSalvo et al ., 2015; Jeon, 1992; König et al ., 2019; Maita et al ., 2018; Shu et al ., 2018; Taylor et al ., 2012). Some of these symbionts belong to the same bacterial genera as important human pathogens such as Mycobacteria , Legionella , and Chlamydia (Drancourt, 2014; Tosetti et al ., 2014; Paquet and Charette, 2016; Boamah et al ., 2017; Cardenal‐Muñoz et al ., 2018; Gomez‐Valero and Buchrieser, 2019).…”

Section: Introductionmentioning

confidence: 99%

Novel Chlamydiae and Amoebophilus endosymbionts are prevalent in wild isolates of the model social amoeba Dictyostelium discoideum

Haselkorn

Jimenez

Bashir

et al. 2021

Environ Microbiol Rep

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Amoebae interact with bacteria in multifaceted ways. Amoeba predation can serve as a selective pressure for the development of bacterial virulence traits. Bacteria may also adapt to life inside amoebae, resulting in symbiotic relationships. Indeed, particular lineages of obligate bacterial endosymbionts have been found in different amoebae. Here, we screened an extensive collection of Dictyostelium discoideum wild isolates for the presence of these bacterial symbionts using endosymbiont specific PCR primers. We find that these symbionts are surprisingly common, identified in 42% of screened isolates (N = 730). Members of the Chlamydiae phylum are particularly prevalent, occurring in 27% of the amoeba isolated. They are novel and phylogenetically distinct from other Chlamydiae. We also found Amoebophilus symbionts in 8% of screened isolates (N = 730). Antibiotic-cured amoebae behave similarly to their Chlamydiae or Amoebophilus-infected counterparts, suggesting that these endosymbionts do not significantly impact host fitness, at least in the laboratory. We found several natural isolates were co-infected with multiple endosymbionts, with no obvious fitness effect of coinfection under laboratory conditions. The high prevalence and novelty of amoeba endosymbiont clades in the model organism D. discoideum opens the door to future research on the significance and mechanisms of amoeba-symbiont interactions.

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Section: Introductionmentioning

confidence: 99%

Novel Chlamydiae and Amoebophilus endosymbionts are prevalent in wild isolates of the model social amoeba Dictyostelium discoideum

Haselkorn

Jimenez

Bashir

et al. 2021

Environ Microbiol Rep

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“…They can compose their information with the information of other molecular structures. The symbiosis is a complex concept and it may involve situations where mutual benefits are not clear [17] [21]. The endosymbiosis is directed to the symbiont absorption on the long run.…”

Section: Introductionmentioning

confidence: 99%

Transgenetic algorithm

Goldbarg

Bagi

2007

Proceedings of the 9th Annual Conference Companion on Genetic and Evolutionary Computation

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Transgenetic algorithms are evolutionary computing techniques based on living processes where cooperation is the main evolutionary strategy. Those processes contain the movement of genetic material between living beings and endosymbiotic interactions. With the objective of having a better approximation between the proposed metaphor and the reality the algorithm also considers intracellular mechanisms of genetic information transposition and the quorum sensing, that is, the bacteria's ability for communicating and coordinating actions. To illustrate the application of a transgenetic algorithm to a difficult combinatorial optimization problem, an example is provided for the Traveling Purchaser Problem. The introduced approach is compared with two recent heuristics proposed for the same problem. The results of a computational experiment are reported and 9 new best solutions for benchmark instances are presented.

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Prokaryotic Symbionts of Amoebae and Flagellates

Cited by 2 publications

References 63 publications

Novel Chlamydiae and Amoebophilus endosymbionts are prevalent in wild isolates of the model social amoeba Dictyostelium discoideum

Novel Chlamydiae and Amoebophilus endosymbionts are prevalent in wild isolates of the model social amoeba Dictyostelium discoideum

Transgenetic algorithm

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