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| biopax3:comment |
By analogy with adenylyl cyclases I and II, adenylyl cyclase VIII is activated by G(s) alpha:GTP by protein-protein interaction between G(s) alpha and the C2 region of adenylyl cyclase VIII, forming a complex. Adenylyl cyclase VIII is present in beta cells of rat and is activated by both G(s) alpha:GTP and calcium:calmodulin, thus integrating signals from both GLP-1 via G(s) alpha and glucose via calcium. Human beta cells contain adenylyl cyclases V and VI, which are also activated by G(s) alpha:GTP, and may contain additional adenylyl cyclases.
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