Adenylate cyclase G-alpha binding (IPR013716)

Short name: Adenylate_cyclase_G-a-bd

Overlapping homologous superfamilies


Domain relationships



Adenylate cyclase catalyses the conversion of ATP to 3',5'-cyclic AMP (cAMP) and pyrophosphate. It plays an essential role in the regulation of cellular metabolism by catalysing the synthesis of a second messenger, cAMP. G protein-mediated signalling is implicated in yeast and fungal cAMP pathways. The cAMP-PKA pathway consists of an extracellular ligand-sensitive G protein-coupled receptor, a G protein signal transmitter, and the effector adenylate cyclase. The product of adenylate cyclase, cAMP, acts as an intracellular second messenger [PMID: 16924114].

GTP-bound RAS2 is required to elicit magnesium-dependent adenylyl cyclase activity in Saccharomyces cerevisiae. In Schizosaccharomyces pombe, however, the cyclase is probably not regulated by RAS proteins, but is activated by git1.

In S. pombe, Gpa2 Galpha binds an N-terminal domain of adenylate cyclase, comprising a moderately conserved sequence, which is within a region that is poorly related to other fungal adenylate cyclases. Adenylate cyclase is directly activated by a fungal G protein, which suggests a distinct activation mechanism from that of mammals [PMID: 15831585].

This fungal domain interacts with the alpha subunit of heterotrimeric G proteins [PMID: 15831585].

GO terms

Biological Process

GO:0006171 cAMP biosynthetic process

Molecular Function

GO:0004016 adenylate cyclase activity
GO:0000287 magnesium ion binding

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.