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Transcript localization of four opsin genes in the three visual organs of Drosophila; RH2 is ocellus specific

Pollock, John A. and Benzer, Seymour (1988) Transcript localization of four opsin genes in the three visual organs of Drosophila; RH2 is ocellus specific. Nature, 333 (6175). pp. 779-782. ISSN 0028-0836. doi:10.1038/333779a0.

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Drosophila and other Dipteran flies have three different kinds of visual organs; in the adult a pair of compound eyes and three dorsal ocelli; and in the larva a pair of internal photoreceptor organs. They develop in distinct ways, yet have certain features in common. All three organs use retinal-derived chromophores, coupled to distinct opsins, to provide a diversity of spectral sensitivities. Four opsin genes have been identified thus far in Drosophila: Rhl, Rh2, Rh3 and Rh4. We have used in situ hybridization to study the messenger RNAs expressed by these four opsin genes in all three visual organs. Rhl, Rh3 and Rh4 are already known to be expressed in different subsets of cells in the compound eye. We found that, in contrast, opsin Rh2 is the predominant opsin expressed in the ocelli. Opsin Rhl is known to be expressed in the larval photoreceptor. We found that Rh3 and Rh4 are as well, but not Rh2. The ocellar-specific gene expression of Rh2 is of particular interest for its possible bearing on the function of the ocellus.

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Additional Information:© 1988 Nature Publishing Group. Received 17 March; accepted 25 April 1988. We thank Charles Zuker for the opsin DNAs and for results prior to publication, Drzislav Mismer, Gerald Rubin and their coworkers also for unpublished results and our colleagues for comments on the manuscript. Technical assistance was provided by Marika Anderson, Julia Chang, Eveline Eichenberger and Rosalind Young. This work was supported by an NIH postdoctoral fellowship to J.A.P., an NSF grant to S.B., and a Developmental Biology Grant from the Lucille P. Markey Charitable Trust.
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NIH Postdoctoral FellowshipUNSPECIFIED
Lucille P. Markey Charitable TrustUNSPECIFIED
Issue or Number:6175
Record Number:CaltechAUTHORS:20190228-160707568
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93369
Deposited By: George Porter
Deposited On:01 Mar 2019 16:58
Last Modified:16 Nov 2021 16:57

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