RRC ID 54430
Author Misra JR, Irvine KD.
Title Early girl is a novel component of the Fat signaling pathway.
Journal PLoS Genet
Abstract The Drosophila protocadherins Dachsous and Fat regulate growth and tissue polarity by modulating the levels, membrane localization and polarity of the atypical myosin Dachs. Localization to the apical junctional membrane is critical for Dachs function, and the adapter protein Vamana/Dlish and palmitoyl transferase Approximated are required for Dachs membrane localization. However, how Dachs levels are regulated is poorly understood. Here we identify the early girl gene as playing an essential role in Fat signaling by limiting the levels of Dachs protein. early girl mutants display overgrowth of the wings and reduced cross vein spacing, hallmark features of mutations affecting Fat signaling. Genetic experiments reveal that it functions in parallel with Fat to regulate Dachs. early girl encodes an E3 ubiquitin ligase, physically interacts with Dachs, and regulates its protein stability. Concomitant loss of early girl and approximated results in accumulation of Dachs and Vamana in cytoplasmic punctae, suggesting that it also regulates their trafficking to the apical membrane. Our findings establish a crucial role for early girl in Fat signaling, involving regulation of Dachs and Vamana, two key downstream effectors of this pathway.
Volume 15(1)
Pages e1007955
Published 2019-1-1
DOI 10.1371/journal.pgen.1007955
PMID 30699121
PMC PMC6370246
MeSH Acyltransferases / genetics* Animals Cell Adhesion Molecules / genetics* Cell Polarity / genetics Drosophila Proteins / genetics* Drosophila melanogaster / genetics Humans Membrane Proteins / genetics Mutation Myosins / genetics Protein Transport / genetics Signal Transduction Ubiquitin-Protein Ligases / genetics* Wings, Animal / growth & development
IF 5.224
Times Cited 1
Drosophila 17033R-3