Is predicted to encode a protein with the following domains: Guanylate kinase; Guanylate kinase/L-type calcium channel beta subunit; SH3-like domain superfamily; and P-loop containing nucleoside triphosphate hydrolase. Is an ortholog of C. elegans lin-2. In C. elegans, lin-2 is involved in several processes, including egg-laying behavior; positive regulation of vulval development; and protein localization to membrane.