Has a large extracellular domain which may be involved in the recognition of an extracellular signal present during germination, leading to activation or inhibition of cAMP synthesis by the cytoplasmic domain. ATP = 3',5'-cyclic AMP + diphosphate Insensitive to guanine nucleotides. After fruiting bodies have been formed and during germination. Belongs to the adenylyl cyclase class-4/guanylyl cyclase family.