LRP-2 likely acts downstream of EGL-20/Wnt
- Creators
- Minor, Paul J.
-
Sternberg, Paul W.
Abstract
The C. elegans vulva is formed from divisions of three vulval precursor cells (VPCs) – P5.p, P6.p, and P7.p – arranged along the anteroposterior axis in the ventral epithelium (Sulston and Horvitz, 1977). Previous analyses show the orientation of P5.p and P7.p descendants is determined by the interaction of multiple Wnt signals. egl-20/Wnt is expressed in the tail (Whangbo and Kenyon, 2000) and forms a posterior-to-anterior concentration gradient (Coudreuse et al., 2006). It has previously been shown that EGL-20 acts instructively during vulva development by imparting directional information, as opposed to being permissive, where it would only be required for polarization (Green et al., 2008; Minor et al., 2013). By moving the source of egl-20 expression from the posterior of the worm to the anchor cell, the axis of symmetry of the developing vulva, we can reorient the daughter cells of P5.p and P7.p toward the center in a wild-type configuration. Expression of egl-20 from the center of the axis of symmetry partially suppresses the lin-17(n671) phenotype (Green et al., 2008; Table 1). To test whether LRP-2 acts downstream of EGL-20, we ectopically expressed egl-20 from the anchor cell in a lin-17(n671); lrp-2(gk272) double mutant background and compared it to a lin-17(n671); lrp-2(+) strain. If LRP-2 acts downstream of EGL-20, then anteriorly-expressed EGL-20 will not be able to suppress the lin-17 phenotype, with is the result observed (Table 1). Thus, like CAM-1 and VANG-1, LRP-2 likely acts downstream of EGL-20.
Additional Information
© 2019 by the authors. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Received: July 29, 2019; Accepted: August 26, 2019; Published: August 27, 2019. Funding: Howard Hughes Medical Institute, with whom PWS was an Investigator. The National Institute of Neurological Disorders and Stroke of the National Institutes of Health under award number 1F32NS098658-01A1 awarded to PJM. Reviewed By: David Eisenmann.Attached Files
Published - 10.17912micropub.biology.000153.pdf
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Additional details
- PMCID
- PMC7252290
- Eprint ID
- 104060
- Resolver ID
- CaltechAUTHORS:20200625-124034164
- Howard Hughes Medical Institute (HHMI)
- NIH Postdoctoral Fellowship
- 1F32NS098658-01A1
- Created
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2020-06-25Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field