The College of Pharmacy and Research Institute for Drug Development, Chonnam National University, Gwangju, 500-757, Korea.
Mol Cells. 2010 Mar;29(3):233-7. doi: 10.1007/s10059-010-0030-2. Epub 2010 Jan 21.
E-cadherin is a member of the cadherin family of Ca(2+)-dependent cell-cell adhesion molecules. p120-Catenin and delta-catenin are known to bind to similar juxtamembrane regions of E-cadherin, and p120-catenin is known to stabilize E-cadherin. However, the function of competition between p120-catenin and delta-catenin for E-cadherin has not been fully explained. In this report, we show that cells overexpressing delta-catenin contain less p120-catenin than control cells at the cell-cell interface and that this causes the relocalization of p120-catenin from the plasma membrane to the cytosol. We show that successful binding by either one to E-cadherin adversely affects the stability of the other.
E-钙黏蛋白是钙依赖细胞黏附分子钙黏蛋白家族的一员。已知 p120-连环蛋白和 δ-连环蛋白结合到 E-钙黏蛋白类似的质膜近侧区域,并且 p120-连环蛋白已知稳定 E-钙黏蛋白。然而,p120-连环蛋白和 δ-连环蛋白与 E-钙黏蛋白竞争的功能尚未完全解释。在本报告中,我们表明,过表达 δ-连环蛋白的细胞在细胞-细胞界面处含有比对照细胞更少的 p120-连环蛋白,这导致 p120-连环蛋白从质膜向细胞质重新定位。我们表明,两者之一与 E-钙黏蛋白的成功结合都会对另一个的稳定性产生不利影响。