オオノ　ヒデキ   大野　秀樹    所属   医学部 医学科（附属足立医療センター）    職種   講師
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Localization of p0071-interacting proteins, plakophilin-related armadillo-repeat protein-interacting protein (PAPIN) and ERBIN, in epithelial cells
掲載誌名	正式名：Oncogene
掲載区分	国外
巻・号・頁	21,pp.7042-7049
著者・共著者	Ohno, H Hirabayashi, S Iizuka, T Ohnishi, H Fujita, T Hata, Y
担当区分	筆頭著者
発行年月	2002
概要	PAPIN has six PDZ domains and interacts with p0071, a catenin-related protein. Recent studies have revealed that catenins determine the subcellular localization of some PDZ proteins. We have examined whether the localization of PAPIN is determined by p0071 in epithelial cells. PAPIN was localized not only on the lateral membrane but also on the apical membrane, where p0071 was absent. The targeting to both membranes was mediated by the middle region of PAPIN and did not require the p0071-interacting PDZ domain. In cells that came into contact, PAPIN was diffusely distributed on the plasma membrane, while p0071 was concentrated at immature cell-cell contacts. When epithelial cells were exposed to the low concentration of calcium, p0071 was internalized, whereas PAPIN remained on the plasma membrane. We also confirmed that the interaction with p0071 was not essential for the membrane targeting of ERBIN, a recently identified p0071- and ErbB2-binding protein. PAPIN, p0071, and ERBIN formed a complex in 293T cells. Furthermore, ERBIN and ErbB2 were colocalized with PAPIN on the lateral membrane. These findings suggest that PAPIN, p0071, and ERBIN come to the cell-cell contacts independently and interact with each other on the lateral membrane.
DOI	10.1038/sj.onc.1205852