Is predicted to encode a protein with the following domains: SPRY domain; B30.2/SPRY domain superfamily; Concanavalin A-like lectin/glucanase domain superfamily; and Immunoglobulin-like fold. Is an ortholog of C. elegans madd-2. In C. elegans, madd-2 is involved in cell projection organization; protein ubiquitination; and regulation of protein localization.