Abstract:
:Endosomal trafficking of EGF receptor (EGFR) upon stimulation is a highly regulated process during receptor-mediated signaling. Recently, the sorting nexin (SNX) family has emerged as an important regulator in the membrane trafficking of EGFR. Here, we report the identification of a novel interaction between two members of the family, SNX1 and SNX5, which is mediated by the newly defined BAR domain of both SNXs. We have also shown that the PX domain of SNX5 binds specifically to PtdIns other than to PtdIns(3)P. Furthermore, the BAR domain but not the PX domain of SNX5 is sufficient for its subcellular membrane association. Functionally, overexpression of SNX5 inhibits the degradation of EGFR. This process appears to be independent of its interaction with SNX1. However, overexpression of SNX1 is able to attenuate the effect of SNX5 on EGFR degradation, suggesting the two proteins may play antagonistic roles in regulating endosomal trafficking of the receptor.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Liu H,Liu ZQ,Chen CX,Magill S,Jiang Y,Liu YJdoi
10.1016/j.bbrc.2006.01.179subject
Has Abstractpub_date
2006-04-07 00:00:00pages
537-46issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(06)00178-1journal_volume
342pub_type
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journal_title:Biochemical and biophysical research communications
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