Is predicted to encode a protein with the following domains: Kelch-type beta propeller; Galactose oxidase/kelch, beta-propeller; EGF-like domain; CUB domain; Laminin EGF domain; Kelch motif; Kelch repeat type 1; PSI domain; Spermadhesin, CUB domain superfamily; Laminin-type EGF domain; and Plexin repeat. Is an ortholog of C. elegans atrn-1.