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Expression of the receptor-linked protein tyrosine phosphatase LAR: proteolytic cleavage and shedding of the CAM-like extracellular region.

1992; Springer Nature; Volume: 11; Issue: 3 Linguagem: Inglês

10.1002/j.1460-2075.1992.tb05128.x

1460-2075

Michel Streuli, N. Krueger, P D Ariniello, M. H. Y. Tang, J M Munro, W A Blättler, David A. Adler, Christine M. Distèche, Haruo Saito,

Cell Adhesion Molecules Research

Research Article1 March 1992free access Expression of the receptor-linked protein tyrosine phosphatase LAR: proteolytic cleavage and shedding of the CAM-like extracellular region. M. Streuli M. Streuli Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author N.X. Krueger N.X. Krueger Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author P.D. Ariniello P.D. Ariniello Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author M. Tang M. Tang Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author J.M. Munro J.M. Munro Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author W.A. Blattler W.A. Blattler Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author D.A. Adler D.A. Adler Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author C.M. Disteche C.M. Disteche Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author H. Saito H. Saito Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author M. Streuli M. Streuli Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author N.X. Krueger N.X. Krueger Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author P.D. Ariniello P.D. Ariniello Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author M. Tang M. Tang Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author J.M. Munro J.M. Munro Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author W.A. Blattler W.A. Blattler Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author D.A. Adler D.A. Adler Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author C.M. Disteche C.M. Disteche Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author H. Saito H. Saito Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. Search for more papers by this author Author Information M. Streuli1, N.X. Krueger1, P.D. Ariniello1, M. Tang1, J.M. Munro1, W.A. Blattler1, D.A. Adler1, C.M. Disteche1 and H. Saito1 1Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115. The EMBO Journal (1992)11:897-907https://doi.org/10.1002/j.1460-2075.1992.tb05128.x PDFDownload PDF of article text and main figures. ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InMendeleyWechatReddit Figures & Info The human transmembrane molecule LAR is a protein tyrosine phosphatase (PTPase) with a cell adhesion molecule-like extracellular receptor region. The structure of LAR hinted at its involvement in the regulation of tyrosine phosphorylation through cell-cell or cell-matrix interactions. We show here that LAR is expressed on the cell surface as a complex of two non-covalently associated subunits derived from a proprotein. The LAR E-subunit contains the cell adhesion molecule-like receptor region, while the LAR P-subunit contains a short segment of the extracellular region, the transmembrane peptide and the cytoplasmic PTPase domains. Proprotein processing occurs intracellularly. Analysis of LAR mutants suggested that cleavage occurs in the LAR extracellular region at a paired basic amino acid site by a subtilisin-like endoprotease. A single amino acid substitution at this site blocked LAR proprotein cleavage. The LAR E-subunit is shed during cell growth, suggesting that LAR receptor shedding may be a mechanism for regulating PTPase function. The use of immunohistochemistry techniques on human tissues demonstrated the expression of LAR by various cell lineages, including epithelial cells, smooth muscle cells and cardiac myocytes. The LAR gene is mapped to chromosome 1, region p32–33, which contains candidate tumor suppressor genes. Previous ArticleNext Article Volume 11Issue 31 March 1992In this issue RelatedDetailsLoading ...