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CD155
CD155 (cluster of differentiation 155) also known as the poliovirus receptor is a protein that in humans is encoded by the ''PVR'' gene.〔(【引用サイトリンク】 url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=5817 )〕
== Function ==
CD155 is a Type I transmembrane glycoprotein in the immunoglobulin superfamily. Commonly known as ''Poliovirus Receptor'' (PVR) due to its involvement in the cellular poliovirus infection in primates, CD155's normal cellular function is in the establishment of intercellular adherens junctions between epithelial cells. The role of CD155 in the immune system is unclear, though it may be involved in intestinal humoral immune responses.〔 Subsequent data has also suggested that CD155 may also be used to positively select MHC-independent T cells in the thymus.
The external domain mediates cell attachment to the extracellular matrix molecule vitronectin, while its intracellular domain interacts with the dynein light chain Tctex-1/DYNLT1. The gene is specific to the primate lineage, and serves as a cellular receptor for poliovirus in the first step of poliovirus replication.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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