The dynamics of fluorescently labeled endogenous gurken mRNA in Drosophila.

Citation:

Jaramillo AM, Weil TT, Goodhouse J, Gavis ER, Schupbach T. The dynamics of fluorescently labeled endogenous gurken mRNA in Drosophila. J Cell Sci 2008;121(Pt 6):887-94.
The dynamics of fluorescently labeled endogenous gurken mRNA in Drosophila.

Date Published:

2008 Mar 15

ISSN:

0021-9533

Abstract:

During Drosophila oogenesis, the targeted localization of gurken (grk) mRNA leads to the establishment of the axis polarity of the egg. In early stages of oogenesis, grk mRNA is found at the posterior of the oocyte, whereas in the later stages grk mRNA is positioned at the dorsal anterior corner of the oocyte. In order to visualize the real-time localization and anchorage of endogenous grk mRNA in living oocytes, we have utilized the MS2-MCP system. We show that MCP-GFP-tagged endogenous grk mRNA localizes properly within wild-type oocytes and behaves aberrantly in mutant backgrounds. Fluorescence recovery after photobleaching (FRAP) experiments of localized grk mRNA in egg chambers reveal a difference in the dynamics of grk mRNA between young and older egg chambers. grk mRNA particles, as a population, are highly dynamic molecules that steadily lose their dynamic nature as oogenesis progresses. This difference in dynamics is attenuated in K10 and sqd(1) mutants such that mislocalized grk mRNA in older stages is much more dynamic compared with that in wild-type controls. By contrast, in flies with compromised dynein activity, properly localized grk mRNA is much more static. Taken together, we have observed the nature of localized grk mRNA in live oocytes and propose that its maintenance changes from a dynamic to a static process as oogenesis progresses.

DOI:

10.1242/jcs.019091

Alternate Journal:

J. Cell. Sci.
Last updated on 10/04/2017