Is predicted to encode a protein with the following domains: SH2 domain superfamily; SH3-like domain superfamily; Growth factor receptor-bound protein 2; SH3 domain; and SH2 domain. Is an ortholog of C. elegans sem-5. In C. elegans, sem-5 is involved in several processes, including epidermal growth factor receptor signaling pathway; male genitalia development; and regulation of vulval development.