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