Inhibitory regulation of EGF receptor degradation by sorting nexin 5

Hao Liu; Zu Qiang Liu; Carol X.Q. Chen; Stephen Magill; Yu Jiang; Yong Jian Liu

doi:10.1016/j.bbrc.2006.01.179

Inhibitory regulation of EGF receptor degradation by sorting nexin 5

Hao Liu, Zu Qiang Liu, Carol X.Q. Chen, Stephen Magill, Yu Jiang, Yong Jian Liu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

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.

Original language	English (US)
Pages (from-to)	537-546
Number of pages	10
Journal	Biochemical and Biophysical Research Communications
Volume	342
Issue number	2
DOIs	https://doi.org/10.1016/j.bbrc.2006.01.179
State	Published - Apr 7 2006
Externally published	Yes

Keywords

EGFR
Endosomal trafficking
PX domain
Phosphoinositides
Sorting nexin 1
Sorting nexin 5

ASJC Scopus subject areas

Molecular Biology
Biophysics
Biochemistry
Cell Biology

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10.1016/j.bbrc.2006.01.179

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title = "Inhibitory regulation of EGF receptor degradation by sorting nexin 5",

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.",

keywords = "EGFR, Endosomal trafficking, PX domain, Phosphoinositides, Sorting nexin 1, Sorting nexin 5",

author = "Hao Liu and Liu, {Zu Qiang} and Chen, {Carol X.Q.} and Stephen Magill and Yu Jiang and Liu, {Yong Jian}",

note = "Funding Information: We gratefully acknowledge Dr. Alan H. Wells at the University of Pittsburgh for providing NR6/EGFR cell lines. We thank Drs. Linton Traub and Sanjay Mishra for generous help in the establishment of liposomal binding assay in the laboratory. This work was supported by Grants from the National Institutes of Health (MH62092-01A1 to Y.L. and GM068832-01A2 to Y.J.), the Scaife Foundations and CMRF of the University of Pittsburgh Medical Center (to Y.L.), and American Cancer Society (RSG-03-169-TBE to Y.J.).",

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AU - Liu, Zu Qiang

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AU - Magill, Stephen

AU - Jiang, Yu

AU - Liu, Yong Jian

N1 - Funding Information: We gratefully acknowledge Dr. Alan H. Wells at the University of Pittsburgh for providing NR6/EGFR cell lines. We thank Drs. Linton Traub and Sanjay Mishra for generous help in the establishment of liposomal binding assay in the laboratory. This work was supported by Grants from the National Institutes of Health (MH62092-01A1 to Y.L. and GM068832-01A2 to Y.J.), the Scaife Foundations and CMRF of the University of Pittsburgh Medical Center (to Y.L.), and American Cancer Society (RSG-03-169-TBE to Y.J.).

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N2 - 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.

AB - 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.

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KW - Phosphoinositides

KW - Sorting nexin 1

KW - Sorting nexin 5

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Inhibitory regulation of EGF receptor degradation by sorting nexin 5

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