LRP4 serves as a coreceptor of agrin.
LRP4 serves as a coreceptor of agrin.
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DOI:
10.1016/j.neuron.2008.10.006
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发表时间:
2008-10-23
期刊:
影响因子:
16.2
通讯作者:
Mei L
中科院分区:
文献类型:
--
作者:
Zhang B;Luo S;Wang Q;Suzuki T;Xiong WC;Mei L
Formation of the neuromuscular junction (NMJ) requires agrin, a factor released from motoneurons, and MuSK, a transmembrane tyrosine kinase that is activated by agrin. However, how signal is transduced from agrin to MuSK remains unclear. Here we report that low-density lipoprotein receptor (LDLR)-related protein (LRP) 4 (LRP4) functions as a co-receptor of agrin. LRP4 is specifically expressed in myotubes and is concentrated at the NMJ. The extracellular domain of LRP4 interacts with neuronal, but not muscle, agrin. Expression of LRP4 enables agrin binding activity and MuSK signaling in cells that otherwise does not respond to agrin. Suppression of LRP4 expression attenuates agrin binding activity, agrin-induced MuSK tyrosine phosphorylation and AChR clustering in muscle cells. LRP4 also interacts with MuSK in a manner that is stimulated by agrin. Finally, we showed that LRP4 becomes tyrosine-phosphorylated in agrin-stimulated muscle cells. These observations identify LRP4 as a functional co-receptor of agrin that is necessary for agrin-induced MuSK signaling and AChR clustering.
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影响因子:
7.8
作者:
Ferns, M;Deiner, M;Hall, Z
通讯作者:
Hall, Z
影响因子:
25
作者:
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作者:
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DOI:
10.1083/jcb.128.4.625
发表时间:
1995-02
期刊:
The Journal of cell biology
影响因子:
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作者:
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通讯作者:
Ruegg MA
影响因子:
64.5
作者:
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通讯作者:
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