Association of PTEN with NHERF-1
- VernacularTitle:PTEN与NHERF-1相互作用
- Author:
Peng CHEN
;
Xiaomei YANG
;
Ying XIONG
;
Jinyu CHI
;
Song ZHANG
;
Hui YANG
;
Junqi HE
- Publication Type:Journal Article
- Keywords:
PTEN;
NHERF;
protein interaction
- From:
Basic & Clinical Medicine
2006;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To identify PDZ domain containing proteins interacting with PTEN and its characterization with NHERF-1 by proteomic analysis. Methods The interactions between PTEN and PDZ domain containing proteins were screened with PDZ protein array, and the novel one was then identified with GST pull-down and co-immunoprecipitation assay. Results Using a PDZ protein array, we proved PTEN binding with NHERF-1. The interaction of PTEN and NHERF-1 was further characterized by GST pull down assay, and we demonstrated that PTEN associated with NHERF-1 via the binding of PTEN carboxyl-terminal with the PDZ domain 1 (PDZ1) of NHERF-1. The last four amino acids (I-T-K-V) of the PTEN were the key determinants of this interaction as mutation of any of the four amino acids to alanine resulted in markedly reducing association of PTEN with NHERF-1. In addition, the full-length of PTEN robustly associated with NHERF-1 was also determined by co-immunoprecipitation experiment in cos-7 cells. Conclusion PTEN/NHERF-1 association was mediated via the binding of PTEN carboxyl-terminal]with the PDZ1 of NHERF-1, and the last four amino acids of the PTEN carboxyl-terminal were important for PTEN/NHERF-1 interaction.
