Function and Evolutionary Origin of Unicellular Camera-Type Eye Structure

Handle URI:
http://hdl.handle.net/10754/346677
Title:
Function and Evolutionary Origin of Unicellular Camera-Type Eye Structure
Authors:
Hayakawa, Shiho; Takaku, Yasuharu; Hwang, Jung Shan; Horiguchi, Takeo; Suga, Hiroshi; Gehring, Walter; Ikeo, Kazuho; Gojobori, Takashi ( 0000-0001-7850-1743 )
Abstract:
The ocelloid is an extraordinary eyespot organelle found only in the dinoflagellate family Warnowiaceae. It contains retina- and lens-like structures called the retinal body and the hyalosome. The ocelloid has been an evolutionary enigma because of its remarkable resemblance to the multicellular camera-type eye. To determine if the ocelloid is functionally photoreceptive, we investigated the warnowiid dinoflagellate Erythropsidinium. Here, we show that the morphology of the retinal body changed depending on different illumination conditions and the hyalosome manifests the refractile nature. Identifying a rhodopsin gene fragment in Erythropsidinium ESTs that is expressed in the retinal body by in situ hybridization, we also show that ocelloids are actually light sensitive photoreceptors. The rhodopsin gene identified is most closely related to bacterial rhodopsins. Taken together, we suggest that the ocelloid is an intracellular camera-type eye, which might be originated from endosymbiotic origin. © 2015 Hayakawa et al.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Function and Evolutionary Origin of Unicellular Camera-Type Eye Structure 2015, 10 (3):e0118415 PLOS ONE
Publisher:
Public Library of Science (PLoS)
Journal:
PLoS ONE
Issue Date:
3-Mar-2015
DOI:
10.1371/journal.pone.0118415
PubMed ID:
25734540
PubMed Central ID:
PMC4348419
Type:
Article
ISSN:
1932-6203
Additional Links:
http://dx.plos.org/10.1371/journal.pone.0118415
Appears in Collections:
Articles; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorHayakawa, Shihoen
dc.contributor.authorTakaku, Yasuharuen
dc.contributor.authorHwang, Jung Shanen
dc.contributor.authorHoriguchi, Takeoen
dc.contributor.authorSuga, Hiroshien
dc.contributor.authorGehring, Walteren
dc.contributor.authorIkeo, Kazuhoen
dc.contributor.authorGojobori, Takashien
dc.date.accessioned2015-03-15T14:12:14Zen
dc.date.available2015-03-15T14:12:14Zen
dc.date.issued2015-03-03en
dc.identifier.citationFunction and Evolutionary Origin of Unicellular Camera-Type Eye Structure 2015, 10 (3):e0118415 PLOS ONEen
dc.identifier.issn1932-6203en
dc.identifier.pmid25734540en
dc.identifier.doi10.1371/journal.pone.0118415en
dc.identifier.urihttp://hdl.handle.net/10754/346677en
dc.description.abstractThe ocelloid is an extraordinary eyespot organelle found only in the dinoflagellate family Warnowiaceae. It contains retina- and lens-like structures called the retinal body and the hyalosome. The ocelloid has been an evolutionary enigma because of its remarkable resemblance to the multicellular camera-type eye. To determine if the ocelloid is functionally photoreceptive, we investigated the warnowiid dinoflagellate Erythropsidinium. Here, we show that the morphology of the retinal body changed depending on different illumination conditions and the hyalosome manifests the refractile nature. Identifying a rhodopsin gene fragment in Erythropsidinium ESTs that is expressed in the retinal body by in situ hybridization, we also show that ocelloids are actually light sensitive photoreceptors. The rhodopsin gene identified is most closely related to bacterial rhodopsins. Taken together, we suggest that the ocelloid is an intracellular camera-type eye, which might be originated from endosymbiotic origin. © 2015 Hayakawa et al.en
dc.publisherPublic Library of Science (PLoS)en
dc.relation.urlhttp://dx.plos.org/10.1371/journal.pone.0118415en
dc.rightsThis is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en
dc.titleFunction and Evolutionary Origin of Unicellular Camera-Type Eye Structureen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalPLoS ONEen
dc.identifier.pmcidPMC4348419en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionCIB-DDBJ, National Institute of Genetics, Mishima, Japanen
dc.contributor.institutionDepartment of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo, Japanen
dc.contributor.institutionDepartment of Cell Biology Biozentrum, University of Basel, Basel, Switzerlanden
dc.contributor.institutionDepartment of Life Sciences, National Cheng Kung University, Tainan, Taiwanen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorGojobori, Takashien

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