Heterotetramer of two alpha and two beta subunits. Paraxonemal body. And paraxonemal bodies (PABs). The 1224-5/1F strain is deficient in phototaxis. It is not known if this is due to defective adenylate cyclase activity or defective BLUF domains in this protein. Belongs to the adenylyl cyclase class-4/guanylyl cyclase family.