Mindbomb 1, an E3 ubiquitin ligase, forms a complex with RYK to activate Wnt/β-catenin signaling.
Mindbomb 1, an E3 ubiquitin ligase, forms a complex with RYK to activate Wnt/β-catenin signaling.
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DOI:
10.1083/jcb.201107021
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发表时间:
2011-09-05
期刊:
影响因子:
--
通讯作者:
Moon RT
中科院分区:
文献类型:
--
作者:
Berndt JD;Aoyagi A;Yang P;Anastas JN;Tang L;Moon RT
MIB1 ubiquitin ligase–mediated regulation of internalization of the Wnt receptor RYK is necessary for response to Wnt3a ligand in cell culture and C. elegans. Receptor-like tyrosine kinase (RYK) functions as a transmembrane receptor for the Wnt family of secreted protein ligands. Although RYK undergoes endocytosis in response to Wnt, the mechanisms that regulate its internalization and concomitant activation of Wnt signaling are unknown. We discovered that RYK both physically and functionally interacts with the E3 ubiquitin ligase Mindbomb 1 (MIB1). Overexpression of MIB1 promotes the ubiquitination of RYK and reduces its steady-state levels at the plasma membrane. Moreover, we show that MIB1 is sufficient to activate Wnt/β-catenin (CTNNB1) signaling and that this activity depends on endogenous RYK. Conversely, in loss-of-function studies, both RYK and MIB1 are required for Wnt-3A–mediated activation of CTNNB1. Finally, we identify the Caenorhabditis elegans orthologue of MIB1 and demonstrate a genetic interaction between ceMIB and lin-18/RYK in vulva development. These findings provide insights into the mechanisms of Wnt/RYK signaling and point to novel targets for the modulation of Wnt signaling.
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影响因子:
25
作者:
Liu, YB;Shi, J;Zou, YM
通讯作者:
Zou, YM
影响因子:
64.5
作者:
Inoue, T;Oz, HS;Sternberg, PW
通讯作者:
Sternberg, PW
DOI:
10.1083/jcb.200907116
发表时间:
2010-02-22
期刊:
The Journal of cell biology
影响因子:
--
作者:
Hamel S;Fantini J;Schweisguth F
通讯作者:
Schweisguth F
影响因子:
4.8
作者:
Jin, YJ;Blue, EK;Gallagher, PJ
通讯作者:
Gallagher, PJ
影响因子:
21.3
作者:
Angers, S;Thorpe, CJ;Moon, RT
通讯作者:
Moon, RT