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  • Title: Scavenger receptor cysteine-rich domains 9 and 11 of WC1 are receptors for the WC1 counter receptor.
    Author: Ahn JS, Konno A, Gebe JA, Aruffo A, Hamilton MJ, Park YH, Davis WC.
    Journal: J Leukoc Biol; 2002 Aug; 72(2):382-90. PubMed ID: 12149430.
    Abstract:
    Workshop cluster 1 (WC1) is a member of the scavenger receptor cysteine-rich (SRCR) superfamily that includes CD5, CD6, CD163, and M160. Bovine WC1 consists of 11 SRCR domains, a unique domain 1, and two homologous 5 SRCR domain cassettes, WC1 domains 2-6 and 7-11. The porcine orthologue of WC1 contains five SRCR domains with a different domain arrangement. Although the function of WC1 is unknown, WC1 is proposed to be an accessory or homing molecule. Thus, identification of cells that express the counter receptor for WC1 (WC1-CR) is critical to understanding the function of WC1. For this reason, we constructed WC1-human immunoglobulin G1 fusion proteins to identify the binding domain of WC1 and cells that express the WC1-CR. Immunohistochemical analysis revealed WC1 domains 9 and 11 bind cells with macrophage and dendritic cell morphology and cells in ellipsoids in the spleen. These results and the finding of conserved signaling motifs in the cytoplasmic tail suggest WC1 may be an accessory molecule.
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