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Dessauer CW, Watts VJ, Ostrom RS, Conti M, Dove S, Seifert R. International Union of Basic and Clinical Pharmacology. CI. Structures and Small Molecule Modulators of Mammalian Adenylyl Cyclases. Pharmacol Rev 2017; 69:93-139. [PMID: 28255005 PMCID: PMC5394921 DOI: 10.1124/pr.116.013078] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Adenylyl cyclases (ACs) generate the second messenger cAMP from ATP. Mammalian cells express nine transmembrane AC (mAC) isoforms (AC1-9) and a soluble AC (sAC, also referred to as AC10). This review will largely focus on mACs. mACs are activated by the G-protein Gαs and regulated by multiple mechanisms. mACs are differentially expressed in tissues and regulate numerous and diverse cell functions. mACs localize in distinct membrane compartments and form signaling complexes. sAC is activated by bicarbonate with physiologic roles first described in testis. Crystal structures of the catalytic core of a hybrid mAC and sAC are available. These structures provide detailed insights into the catalytic mechanism and constitute the basis for the development of isoform-selective activators and inhibitors. Although potent competitive and noncompetitive mAC inhibitors are available, it is challenging to obtain compounds with high isoform selectivity due to the conservation of the catalytic core. Accordingly, caution must be exerted with the interpretation of intact-cell studies. The development of isoform-selective activators, the plant diterpene forskolin being the starting compound, has been equally challenging. There is no known endogenous ligand for the forskolin binding site. Recently, development of selective sAC inhibitors was reported. An emerging field is the association of AC gene polymorphisms with human diseases. For example, mutations in the AC5 gene (ADCY5) cause hyperkinetic extrapyramidal motor disorders. Overall, in contrast to the guanylyl cyclase field, our understanding of the (patho)physiology of AC isoforms and the development of clinically useful drugs targeting ACs is still in its infancy.
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Affiliation(s)
- Carmen W Dessauer
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Sciences Center at Houston, Houston, Texas (C.W.D.); Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana (V.J.W.); Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California (R.S.O.); Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (M.C.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (S.D.); and Institute of Pharmacology, Hannover Medical School, Hannover, Germany (R.S.)
| | - Val J Watts
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Sciences Center at Houston, Houston, Texas (C.W.D.); Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana (V.J.W.); Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California (R.S.O.); Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (M.C.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (S.D.); and Institute of Pharmacology, Hannover Medical School, Hannover, Germany (R.S.)
| | - Rennolds S Ostrom
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Sciences Center at Houston, Houston, Texas (C.W.D.); Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana (V.J.W.); Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California (R.S.O.); Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (M.C.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (S.D.); and Institute of Pharmacology, Hannover Medical School, Hannover, Germany (R.S.)
| | - Marco Conti
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Sciences Center at Houston, Houston, Texas (C.W.D.); Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana (V.J.W.); Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California (R.S.O.); Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (M.C.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (S.D.); and Institute of Pharmacology, Hannover Medical School, Hannover, Germany (R.S.)
| | - Stefan Dove
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Sciences Center at Houston, Houston, Texas (C.W.D.); Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana (V.J.W.); Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California (R.S.O.); Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (M.C.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (S.D.); and Institute of Pharmacology, Hannover Medical School, Hannover, Germany (R.S.)
| | - Roland Seifert
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Sciences Center at Houston, Houston, Texas (C.W.D.); Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana (V.J.W.); Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California (R.S.O.); Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (M.C.); Institute of Pharmacy, University of Regensburg, Regensburg, Germany (S.D.); and Institute of Pharmacology, Hannover Medical School, Hannover, Germany (R.S.)
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Insel PA, Ostrom RS. Forskolin as a tool for examining adenylyl cyclase expression, regulation, and G protein signaling. Cell Mol Neurobiol 2003; 23:305-14. [PMID: 12825829 DOI: 10.1023/a:1023684503883] [Citation(s) in RCA: 197] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
1. As initially shown by Seamon and Daly, the diterpene forskolin directly activates adenylyl cyclase (AC) and raises cyclic AMP levels in a wide variety of cell types. In this review, we discuss several aspects of forskolin action that are often unappreciated. These include the utility of labeled forskolin as a means to quantitate the number of AC molecules; results of those types of studies, coupled with efforts to increase AC expression, document that such expression stoichiometrically limits cyclic AMP formation by hormones and neurotransmitters. 2. Response to forskolin is also strongly influenced by the activation of AC by the heterotrimeric G-protein, Gs. Gs-promoted enhancement of AC activity in response to forskolin occurs not only when cells are incubated with exogenously administered agonists that activate G-protein-coupled receptors but also by agonists that can be endogenously released by cells. 3. Such agonists, which include ATP and prostaglandins, serve as autocrine/paracrine regulators of cellular levels of cyclic AMP under "basal" conditions and also in response to forskolin and to agonists that promote release of such regulators. 4. The ability of forskolin to prominently activate cyclic AMP generation has proved valuable for understanding stoichiometry of the multiple components involved in "basal" cyclic AMP formation, in enzymologic studies of AC as well as in defining responses to cyclic AMP in cells within and outside the nervous system.
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Affiliation(s)
- Paul A Insel
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, California 92093-0636, USA.
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Enomoto K, Takano M, Ariyoshi S, Asakawa T. Mechanism and properties of inhibition of purified rat brain adenylate cyclase by G protein beta gamma-subunits. JAPANESE JOURNAL OF PHARMACOLOGY 1995; 69:239-50. [PMID: 8699632 DOI: 10.1254/jjp.69.239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The mode of the inhibition of purified rat brain adenylate cyclase by the beta gamma-subunits of G protein (beta gamma) was studied. These subunits inhibited the catalytic activity of the cyclase with the maximal inhibition of 85% and the half-maximal inhibition at about 0.7 nM beta gamma. The complex of beta gamma and adenylate cyclase isolated by density gradient centrifugation contained 1.8-2.0 mol beta gamma per mol of the cyclase when beta gamma was assayed by immunoblotting and by its inhibitory activity on adenylate cyclase. However, the beta gamma concentration-inhibition curves suggest that one of the two beta gamma molecules bound may be essential for the inhibition. The role for the second beta gamma molecule is unknown. As a tentative estimate, 70% of the adenylate cyclase activity remained inhibited by beta gamma when the complex was isolated. The inhibition was not dependent on G alpha s or calmodulin. Although purified adenylate cyclase contained a protein (0.06-0.08 mol/mol of adenylate cyclase) that reacted with anti-G alpha s antibody, this protein was not liberated from the cyclase when it formed a complex with beta gamma. In addition, guanine nucleotide analogs little affected the cyclase activity or the inhibition by beta gamma. The inhibition by beta gamma was reversed by the dilution of the complex, and the following re-addition of beta gamma suppressed the enzyme activity to about 15% of the initial activity again. These findings provide strong evidence that beta gamma inhibits adenylate cyclase directly and reversibly through the formation of the complex.
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Affiliation(s)
- K Enomoto
- Department of Pharmacology, Saga Medical School, Japan
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Wallach J, Droste M, Kluxen FW, Pfeuffer T, Frank R. Molecular cloning and expression of a novel type V adenylyl cyclase from rabbit myocardium. FEBS Lett 1994; 338:257-63. [PMID: 8307190 DOI: 10.1016/0014-5793(94)80279-3] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A cDNA of a novel form of type V adenylyl cyclase has been cloned from rabbit myocardium using oligonucleotide probes derived from peptides that were produced by enzymatic cleavage of purified heart cyclase. A corresponding mRNA (6 kb) has been detected in rabbit myocardial tissue by Northern blot analysis. The cDNA encodes a protein of 1,264 amino acids exhibiting 12 putative membrane-spanning regions in its hydrophilicity profile. Sequence comparison to two other previously published type V adenylyl cyclase reveals amino-terminal domains of different length and low correlative homology, whereas the rest of the sequences is almost identical. The nonconserved amino-terminal region of the subtype consists of 214 amino acids and exceeds the length of the others by 40 and 80 residues, respectively. Its presence in membrane preparations from different tissues has been confirmed immunologically using an antibody directed against a synthetic peptide. The cloned adenylyl cyclase was functionally expressed in COS-1 cells to attain an enzymatic activity 3.5- to 14-fold above control in the presence of forskolin.
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Affiliation(s)
- J Wallach
- Zentrum für Molekulare Biologie, Heidelberg, Germany
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Sutkowski EM, Maher F, Laurenza A, Simpson IA, Seamon KB. Interaction of 7-bromoacetyl-7-desacetylforskolin, and alkylating derivative of forskolin, with bovine brain adenylyl cyclase and human erythrocyte glucose transporter. Biochemistry 1993; 32:2415-22. [PMID: 8443181 DOI: 10.1021/bi00060a037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
7-Bromoacetyl-7-desacetylforskolin (BrAcFsk), an alkylating derivative of forskolin, activated adenylyl cyclase and irreversibly blocked high affinity forskolin binding sites in human platelet membranes and rat brain membranes (Laurenza et al., 1990). Photoincorporation of an iodinated arylazido derivative of forskolin, 125I-6-AIPP-Fsk, into adenylyl cyclase in bovine brain membranes was irreversibly inhibited by BrAcFsk but not by 1,9-dideoxy-BrAcFsk, suggesting that BrAcFsk was reacting specifically with a nucleophilic group(s) at the forskolin binding site of adenylyl cyclase. Immunoblotting with antiforskolin antiserum demonstrated that partially purified bovine brain adenylyl cyclase had incorporated BrAcFsk. The interaction of BrAcFsk with the glucose transporter in human erythrocyte membranes was examined in a similar manner. Photoincorporation of 125I-7-AIPP-Fsk, an iodinated arylazido derivative of forskolin which is specific for the glucose transporter, into the glucose transporter was not irreversibly inhibited by BrAcFsk, suggesting that, in contrast to adenylyl cyclase, there is no reactive nucleophilic group at the forskolin binding site on the human erythrocyte glucose transporter. The immunoblotting procedure with antiforskolin antiserum confirmed that BrAcFsk was not covalently attached to human erythrocyte glucose transporter.
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Affiliation(s)
- E M Sutkowski
- Molecular Pharmacology Laboratory, Food and Drug Administration, Bethesda, Maryland 20892
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