The Connecdenn DENN domain: a GEF for Rab35 mediating cargo-specific exit from early endosomes.
The Connecdenn DENN domain: a GEF for Rab35 mediating cargo-specific exit from early endosomes.
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DOI:
10.1016/j.molcel.2009.12.037
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发表时间:
2010-02-12
期刊:
影响因子:
16
通讯作者:
Ritter B
中科院分区:
文献类型:
--
作者:
Allaire PD;Marat AL;Dall'Armi C;Di Paolo G;McPherson PS;Ritter B
The DENN domain is an evolutionarily ancient protein module. Mutations in the DENN domain cause developmental defects in plants and human diseases, yet the function of this common module is unknown. We now demonstrate that the connecdenn DENN domain functions as a guanine nucleotide exchange factor for Rab35 to regulate endosomal trafficking. Loss of Rab35 activity causes an enlargement of early endosomes, inhibits MHCI recycling, and prevents the early endosomal recruitment of EHD1, a common component recycling tubules on endosomes. Our data are the first to reveal an enzymatic activity for a DENN domain and demonstrate that distinct Rab GTPases can recruit a common protein machinery to various sites within the endosomal network to establish cargo-selective recycling pathways.
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