High-affinity Dkk1 receptor Kremen1 is internalized by clathrin-mediated endocytosis.
High-affinity Dkk1 receptor Kremen1 is internalized by clathrin-mediated endocytosis.
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DOI:
10.1371/journal.pone.0052190
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Burns RC
中科院分区:
文献类型:
--
作者:
Mishra SK;Funair L;Cressley A;Gittes GK;Burns RC
Kremens are high-affinity receptors for Dickkopf 1 (Dkk1) and regulate the Wnt/β-catenin signaling pathway by down-regulating the low-density lipoprotein receptor-related protein 6 (LRP6). Dkk1 competes with Wnt for binding to LRP6; binding of Dkk1 inhibits canonical signaling through formation of a ternary complex with Kremen. The majority of down-regulated clathrin-mediated endocytic receptors contain short conserved regions that recognize tyrosine or dileucine sorting motifs. In this study, we found that Kremen1 is internalized from the cell surface in a clathrin-dependent manner. Kremen1 contains an atypical dileucine motif with the sequence DXXXLV. Mutation of LV to AA in this motif blocked Kremen1 internalization; as reported previously for other proteins, the aspartic acid residue in Kremen1 is not critical. Inhibition of expression of the adaptor protein 2 (AP-2) or inhibition of clathrin by pitstop 2 also blocked Kremen1 internalization. The novel amino acid sequence identified in Kremen1 is similar to the motif previously identified in hydra, yeast, and other organisms known to signal from the trans-Golgi network to the endosomal compartment.
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影响因子:
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作者:
Damke, H;Baba, T;Warnock, D E;Schmid, S L
通讯作者:
Schmid, S L
DOI:
10.1083/jcb.131.1.69
发表时间:
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期刊:
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影响因子:
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DOI:
10.1083/jcb.201103167
发表时间:
2011-05-02
期刊:
The Journal of cell biology
影响因子:
--
作者:
Kestler HA;Kühl M
通讯作者:
Kühl M