TY - JOUR
T1 - p120 catenin recruits cadherins to γ-secretase and inhibits production of Aβ peptide
AU - Kouchi, Zen
AU - Barthet, Gael
AU - Serban, Geo
AU - Georgakopoulos, Anastasios
AU - Shioi, Junichi
AU - Robakis, Nikolaos K.
PY - 2009/1/23
Y1 - 2009/1/23
N2 - The γ-secretase complex cleaves many transmembrane proteins, including amyloid precursor protein, EphB and ErbB tyrosine kinase receptors, Notch1 receptors, and adhesion factors. Presenilin 1, the catalytic subunit of γ-secretase, associates with the cadherin/catenin cell-cell adhesion/communication system and promotes cadherin processing (Georgakopoulos, A., et al. (1999) Mol. Cell 4, 893-902; Marambaud, P., et al. (2002) EMBO J. 21, 1948-1956), but the mechanism by which γ-secretase and cadherins associate is unclear. Here we report that p120 catenin (p120ctn), a component of the cadherin-catenin complex, recruits γ-secretase to cadherins, thus stimulating their processing while inhibiting production of Aβ peptide and the amyloid precursor protein intracellular domain. This function of p120ctn depends on both p120ctn-cadherin and p120ctn-presenilin 1 binding, indicating that p120ctn is the central factor that bridges γ-secretase and cadherin-catenin complexes. Our data show that p120ctn is a unique positive regulator of the γ-secretase processing of cadherins and a negative regulator of the amyloid precursor protein processing. Furthermore, our data suggest that specific members of the γ-secretase complex may be used to recruit different substrates and that distinct PS1 sequences are required for processing of APP and cadherins.
AB - The γ-secretase complex cleaves many transmembrane proteins, including amyloid precursor protein, EphB and ErbB tyrosine kinase receptors, Notch1 receptors, and adhesion factors. Presenilin 1, the catalytic subunit of γ-secretase, associates with the cadherin/catenin cell-cell adhesion/communication system and promotes cadherin processing (Georgakopoulos, A., et al. (1999) Mol. Cell 4, 893-902; Marambaud, P., et al. (2002) EMBO J. 21, 1948-1956), but the mechanism by which γ-secretase and cadherins associate is unclear. Here we report that p120 catenin (p120ctn), a component of the cadherin-catenin complex, recruits γ-secretase to cadherins, thus stimulating their processing while inhibiting production of Aβ peptide and the amyloid precursor protein intracellular domain. This function of p120ctn depends on both p120ctn-cadherin and p120ctn-presenilin 1 binding, indicating that p120ctn is the central factor that bridges γ-secretase and cadherin-catenin complexes. Our data show that p120ctn is a unique positive regulator of the γ-secretase processing of cadherins and a negative regulator of the amyloid precursor protein processing. Furthermore, our data suggest that specific members of the γ-secretase complex may be used to recruit different substrates and that distinct PS1 sequences are required for processing of APP and cadherins.
UR - http://www.scopus.com/inward/record.url?scp=59049101595&partnerID=8YFLogxK
U2 - 10.1074/jbc.M806250200
DO - 10.1074/jbc.M806250200
M3 - Article
C2 - 19008223
AN - SCOPUS:59049101595
SN - 0021-9258
VL - 284
SP - 1954
EP - 1961
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
IS - 4
ER -