PMID- 10574709 OWN - NLM STAT- MEDLINE DCOM- 20000424 LR - 20220409 IS - 0021-9533 (Print) IS - 0021-9533 (Linking) VI - 112 ( Pt 24) DP - 1999 Dec TI - Identification of PA2.26 antigen as a novel cell-surface mucin-type glycoprotein that induces plasma membrane extensions and increased motility in keratinocytes. PG - 4601-13 AB - PA2.26 antigen was identified as a cell-surface protein induced in epidermal carcinogenesis and skin remodeling processes. PA2.26 is expressed in carcinoma cell lines and cultured fibroblasts but absent in nontumorigenic keratinocytes. In tissues, PA2.26 is present in epithelial cells of the choroid plexus, ependyma, glomerulus and alveolus, in mesothelial cells, and in endothelia of lymphatic vessels. Biochemical characterization of PA2.26 protein and sequence analysis of the isolated cDNA demonstrate that PA2.26 antigen is a mucin-like transmembrane glycoprotein. Confocal and immunoelectron microscopy analysis in cultured cells reveal that PA2. 26 is concentrated in actin-rich microvilli and plasma membrane projections, such as filopodia, lamellipodia and ruffles, where it colocalizes with members of the ERM (ezrin, radixin, moesin) family protein. Ezrin and moesin, but not radixin, can be coimmunoprecipitated together with PA2.26 from cell lysates. Ectopic expression of PA2.26 in immortalized, nontumorigenic, keratinocytes induces an epithelial-fibroblastoid morphological conversion with increased plasma membrane extensions, concomitantly to a major reorganization of the actin cytoskeleton, redistribution of ezrin to cell-surface projections, and enhanced motility. These findings suggest an involvement of PA2.26 in cell migration. FAU - Scholl, F G AU - Scholl FG AD - Instituto de Investigaciones Biomedicas Alberto Sols CSIC-UAM, Hospital de la Princesa, Facultad de Medicina UAM, Spain. FAU - Gamallo, C AU - Gamallo C FAU - Vilaro, S AU - Vilaro S FAU - Quintanilla, M AU - Quintanilla M LA - eng SI - GENBANK/AJ250246 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Cell Sci JT - Journal of cell science JID - 0052457 RN - 0 (Actins) RN - 0 (Antigens, Surface) RN - 0 (DNA, Complementary) RN - 0 (Gp38 protein, mouse) RN - 0 (Membrane Glycoproteins) SB - IM MH - Actins/ultrastructure MH - Amino Acid Sequence MH - Animals MH - Antigens, Surface/genetics/immunology/*metabolism MH - Base Sequence MH - Cell Line MH - Cell Membrane/ultrastructure MH - Cell Movement/*immunology MH - Cloning, Molecular MH - DNA, Complementary MH - Immunohistochemistry MH - Keratinocytes/*cytology MH - Membrane Glycoproteins/genetics/immunology/*metabolism MH - Mice MH - Microscopy, Immunoelectron MH - Molecular Sequence Data MH - Reverse Transcriptase Polymerase Chain Reaction MH - Transfection EDAT- 1999/11/27 09:00 MHDA- 2000/04/29 09:00 CRDT- 1999/11/27 09:00 PHST- 1999/11/27 09:00 [pubmed] PHST- 2000/04/29 09:00 [medline] PHST- 1999/11/27 09:00 [entrez] AID - 10.1242/jcs.112.24.4601 [doi] PST - ppublish SO - J Cell Sci. 1999 Dec;112 ( Pt 24):4601-13. doi: 10.1242/jcs.112.24.4601.