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Function and evolutionary origin of unicellular camera-type eye structure.
PLoS One. 2015; 10(3):e0118415.Plos

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.

Authors+Show Affiliations

CIB-DDBJ, National Institute of Genetics, Mishima, Japan.CIB-DDBJ, National Institute of Genetics, Mishima, Japan.CIB-DDBJ, National Institute of Genetics, Mishima, Japan.Department of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan.Department of Cell Biology Biozentrum, University of Basel, Basel, Switzerland.Department of Cell Biology Biozentrum, University of Basel, Basel, Switzerland.CIB-DDBJ, National Institute of Genetics, Mishima, Japan.CIB-DDBJ, National Institute of Genetics, Mishima, Japan; Department of Life Sciences, National Cheng Kung University, Tainan, Taiwan; CBRC/BESE, KAUST, Thuwal, 23955-6900, Kingdom of Saudi Arabia.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

25734540

Citation

Hayakawa, Shiho, et al. "Function and Evolutionary Origin of Unicellular Camera-type Eye Structure." PloS One, vol. 10, no. 3, 2015, pp. e0118415.
Hayakawa S, Takaku Y, Hwang JS, et al. Function and evolutionary origin of unicellular camera-type eye structure. PLoS ONE. 2015;10(3):e0118415.
Hayakawa, S., Takaku, Y., Hwang, J. S., Horiguchi, T., Suga, H., Gehring, W., Ikeo, K., & Gojobori, T. (2015). Function and evolutionary origin of unicellular camera-type eye structure. PloS One, 10(3), e0118415. https://doi.org/10.1371/journal.pone.0118415
Hayakawa S, et al. Function and Evolutionary Origin of Unicellular Camera-type Eye Structure. PLoS ONE. 2015;10(3):e0118415. PubMed PMID: 25734540.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Function and evolutionary origin of unicellular camera-type eye structure. AU - Hayakawa,Shiho, AU - Takaku,Yasuharu, AU - Hwang,Jung Shan, AU - Horiguchi,Takeo, AU - Suga,Hiroshi, AU - Gehring,Walter, AU - Ikeo,Kazuho, AU - Gojobori,Takashi, Y1 - 2015/03/03/ PY - 2014/06/28/received PY - 2015/01/16/accepted PY - 2015/3/4/entrez PY - 2015/3/4/pubmed PY - 2016/1/19/medline SP - e0118415 EP - e0118415 JF - PloS one JO - PLoS ONE VL - 10 IS - 3 N2 - 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. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/25734540/Function_and_evolutionary_origin_of_unicellular_camera-type_eye_structure L2 - http://dx.plos.org/10.1371/journal.pone.0118415 DB - PRIME DP - Unbound Medicine ER -