ALIX binds a YPX(3)L motif of the GPCR PAR1 and mediates ubiquitin-independent ESCRT-III/MVB sorting.
ALIX binds a YPX(3)L motif of the GPCR PAR1 and mediates ubiquitin-independent ESCRT-III/MVB sorting.
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DOI:
10.1083/jcb.201110031
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发表时间:
2012-04-30
期刊:
影响因子:
--
通讯作者:
Trejo J
中科院分区:
文献类型:
--
作者:
Dores MR;Chen B;Lin H;Soh UJ;Paing MM;Montagne WA;Meerloo T;Trejo J
A novel MVB/lysosomal sorting pathway for signaling receptors bypasses the requirement for ubiquitination and ubiquitin-binding ESCRTs and may be broadly applicable to GPCRs containing YPXnL motifs. The sorting of signaling receptors to lysosomes is an essential regulatory process in mammalian cells. During degradation, receptors are modified with ubiquitin and sorted by endosomal sorting complex required for transport (ESCRT)–0, –I, –II, and –III complexes into intraluminal vesicles (ILVs) of multivesicular bodies (MVBs). However, it remains unclear whether a single universal mechanism mediates MVB sorting of all receptors. We previously showed that protease-activated receptor 1 (PAR1), a G protein–coupled receptor (GPCR) for thrombin, is internalized after activation and sorted to lysosomes independent of ubiquitination and the ubiquitin-binding ESCRT components hepatocyte growth factor–regulated tyrosine kinase substrate and Tsg101. In this paper, we report that PAR1 sorted to ILVs of MVBs through an ESCRT-III–dependent pathway independent of ubiquitination. We further demonstrate that ALIX, a charged MVB protein 4–ESCRT-III interacting protein, bound to a YPX3L motif of PAR1 via its central V domain to mediate lysosomal degradation. This study reveals a novel MVB/lysosomal sorting pathway for signaling receptors that bypasses the requirement for ubiquitination and ubiquitin-binding ESCRTs and may be applicable to a subset of GPCRs containing YPXnL motifs.
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DOI:
10.1038/nrm2937
发表时间:
2010-08
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
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影响因子:
3.3
作者:
Bishop, N;Woodmane, P
通讯作者:
Woodmane, P
影响因子:
4
作者:
Odorizzi, G;Katzmann, DJ;Emr, SD
通讯作者:
Emr, SD
影响因子:
5.3
作者:
Booden, MA;Eckert, LB;Trejo, J
通讯作者:
Trejo, J
影响因子:
4
作者:
Cabezas, A;Bache, KG;Stenmark, H
通讯作者:
Stenmark, H