Enables Hsp90 protein binding activity; heme binding activity; and ion binding activity. Contributes to adenylate cyclase activity and cytidylate cyclase activity. Predicted to be involved in several processes, including cGMP biosynthetic process; cellular response to nitric oxide; and nitric oxide-cGMP-mediated signaling pathway. Located in presynaptic active zone. Part of guanylate cyclase complex, soluble. Is active in glutamatergic synapse and presynaptic active zone cytoplasmic component. Orthologous to human GUCY1B1 (guanylate cyclase 1 soluble subunit beta 1). [provided by Alliance of Genome Resources, Apr 2022]