Abl regulates planar polarized junctional dynamics through β-catenin tyrosine phosphorylation.
Abl regulates planar polarized junctional dynamics through β-catenin tyrosine phosphorylation.
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DOI:
10.1016/j.devcel.2011.12.025
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发表时间:
2012-02-14
影响因子:
11.8
通讯作者:
Zallen, Jennifer A.
中科院分区:
文献类型:
--
作者:
Tamada, Masako;Farrell, Dene L.;Zallen, Jennifer A.
Interactions between epithelial cells are mediated by adherens junctions that are dynamically regulated during development. Here we show that the turnover of β-catenin is increased at cell interfaces that are targeted for disassembly during Drosophila axis elongation. The Abl tyrosine kinase is concentrated at specific planar junctions and is necessary for polarized β-catenin localization and dynamics. abl mutant embryos have decreased β-catenin turnover at shrinking edges, and these defects are accompanied a reduction in multicellular rosette formation and axis elongation. Abl promotes β-catenin phosphorylation on the conserved tyrosine 667 and expression of an unphosphorylatable β-catenin mutant recapitulates the defects of abl mutants. Notably, a phosphomimetic β-cateninY667E mutation is sufficient to increase β-catenin turnover and rescues axis elongation in abl deficient embryos. These results demonstrate that the asymmetrically localized Abl tyrosine kinase directs planar polarized junctional remodeling during Drosophila axis elongation through the tyrosine phosphorylation of β-catenin.
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影响因子:
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作者:
Brembeck, FH;Schwarz-Romond, T;Birchmeier, W
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作者:
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作者:
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DOI:
10.1083/jcb.200806067
发表时间:
2009-01-26
期刊:
The Journal of cell biology
影响因子:
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通讯作者:
Chapman HA