NDLI: Trichocyst Ribbons of a Cryptomonads Are Constituted of Homologs of R-Body Proteins Produced by the Intracellular Parasitic Bacterium of Paramecium

Content Provider	Springer Nature Link
Author	Yamagishi, Takahiro Kai, Atsushi Kawai, Hiroshi
Copyright Year	2012
Abstract	Trichocysts are ejectile organelles found in cryptomonads, dinoflagellates, and peniculine ciliates. The fine structure of trichocysts differs considerably among lineages, and their evolutionary relationships are unclear. The biochemical makeup of the trichocyst constituents has been studied in the ciliate Paramecium, but there have been no investigations of cryptomonads and dinoflagellates. Furthermore, morphological similarity between the contents of cryptomonad trichocysts and the R-bodies of the endosymbiotic bacteria of Paramecium has been reported. In this study, we identified the proteins of the trichocyst constituents in a red cryptomonad, Pyrenomonas helgolandii, and found their closest relationships to be with rebB that comprises the R-bodies of Caedibacter taeniospiralis (gammaproteobacteria), which is an endosymbiont of Paramecium. In addition, the biochemical makeups of the trichocysts are entirely different between cryptomonads and peniculine ciliates, and therefore, cryptomonad trichocysts have an evolutionary origin independent from the peniculine ciliate trichocysts.
Starting Page	147
Ending Page	157
Page Count	11
File Format	PDF
ISSN	00222844
Journal	Journal of Molecular Evolution
Volume Number	74
Issue Number	3-4
e-ISSN	14321432
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-03-25
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Caedibacter taeniospiralis Cryptomonads Paramecium R-body rebB Trichocyst Animal Genetics and Genomics Cell Biology Microbiology Plant Sciences Plant Genetics & Genomics Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Genetics Molecular Biology Ecology, Evolution, Behavior and Systematics

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