Blue-light-receptive cryptochrome is expressed in a sponge eye lacking neurons and opsin

Rivera, Ajna S., Ozturk, Nuri, Fahey, Bryony, Plachetzki, David C., Degnan, Bernard M., Sancar, Aziz and Oakley, Todd H. (2012) Blue-light-receptive cryptochrome is expressed in a sponge eye lacking neurons and opsin. Journal of Experimental Biology, 215 8: 1278-1286. doi:10.1242/jeb.067140

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Author Rivera, Ajna S.
Ozturk, Nuri
Fahey, Bryony
Plachetzki, David C.
Degnan, Bernard M.
Sancar, Aziz
Oakley, Todd H.
Title Blue-light-receptive cryptochrome is expressed in a sponge eye lacking neurons and opsin
Journal name Journal of Experimental Biology   Check publisher's open access policy
ISSN 0022-0949
Publication date 2012-04
Sub-type Article (original research)
DOI 10.1242/jeb.067140
Open Access Status File (Publisher version)
Volume 215
Issue 8
Start page 1278
End page 1286
Total pages 9
Place of publication Cambridge, United Kingdom
Publisher The Company of Biologists
Collection year 2013
Language eng
Formatted abstract
Many larval sponges possess pigment ring eyes that apparently mediate phototactic swimming. Yet sponges are not known to possess nervous systems or opsin genes, so the unknown molecular components of sponge phototaxis must differ fundamentally from those in other animals, inspiring questions about how this sensory system functions. Here we present molecular and biochemical data on cryptochrome, a candidate gene for functional involvement in sponge pigment ring eyes. We report that Amphimedon queenslandica, a demosponge, possesses two cryptochrome/photolyase genes, Aq-Cry1 and Aq-Cry2. The mRNA of one gene (Aq-Cry2) is expressed in situ at the pigment ring eye. Additionally, we report that Aq-Cry2 lacks photolyase activity and contains a flavin-based co-factor that is responsive to wavelengths of light that also mediate larval photic behavior. These results suggest that Aq-Cry2 may act in the aneural, opsin-less phototaxic behavior of a sponge.
Keyword Porifera
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Biological Sciences Publications
Centre for Marine Studies Publications
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Citation counts: TR Web of Science Citation Count  Cited 28 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 30 times in Scopus Article | Citations
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