cAMP is a signaling molecule important for a variety of cellular functions. cAMP exerts its effects by activating the cAMP-dependent protein kinase A (PKA), which transduces the signal through phosphorylation of different target proteins. The inactive holoenzyme of PKA is a tetramer composed of two regulatory and two catalytic subunits. cAMP causes the dissociation of the inactive holoenzyme into a dimer of regulatory subunits bound to four cAMP and two free monomeric catalytic subunits. Four different regulatory subunits and three catalytic subunits of PKA have been identified in humans. The protein encoded by this gene is one of the regulatory subunits. This protein was found to be a tissue-specific extinguisher that down-regulates the expression of seven liver genes in hepatoma x fibroblast hybrids Three alternatively spliced transcript variants encoding the same protein have been observed.[2]
Clinical significance
Functional null mutations in this gene cause Carney complex (CNC), an autosomal dominant multiple neoplasia syndrome. This gene can fuse to the RET protooncogene by gene rearrangement and form the thyroid tumor-specific chimeric oncogene known as PTC2.[2]
Mutation of PRKAR1A leads to the Carney complex, associating multiple endocrine tumors.[citation needed]
↑Rual JF, Venkatesan K, Hao T, Hirozane-Kishikawa T, Dricot A, Li N, Berriz GF, Gibbons FD, Dreze M, Ayivi-Guedehoussou N, Klitgord N, Simon C, Boxem M, Milstein S, Rosenberg J, Goldberg DS, Zhang LV, Wong SL, Franklin G, Li S, Albala JS, Lim J, Fraughton C, Llamosas E, Cevik S, Bex C, Lamesch P, Sikorski RS, Vandenhaute J, Zoghbi HY, Smolyar A, Bosak S, Sequerra R, Doucette-Stamm L, Cusick ME, Hill DE, Roth FP, Vidal M (October 2005). "Towards a proteome-scale map of the human protein-protein interaction network". Nature. 437 (7062): 1173–8. doi:10.1038/nature04209. PMID16189514.
↑ 5.05.1Carlson CR, Ruppelt A, Taskén K (March 2003). "A kinase anchoring protein (AKAP) interaction and dimerization of the RIalpha and RIbeta regulatory subunits of protein kinase a in vivo by the yeast two hybrid system". J. Mol. Biol. 327 (3): 609–18. doi:10.1016/s0022-2836(03)00093-7. PMID12634056.
↑Herberg FW, Maleszka A, Eide T, Vossebein L, Tasken K (April 2000). "Analysis of A-kinase anchoring protein (AKAP) interaction with protein kinase A (PKA) regulatory subunits: PKA isoform specificity in AKAP binding". J. Mol. Biol. 298 (2): 329–39. doi:10.1006/jmbi.2000.3662. PMID10764601.
↑Brown PR, Miki K, Harper DB, Eddy EM (June 2003). "A-kinase anchoring protein 4 binding proteins in the fibrous sheath of the sperm flagellum". Biol. Reprod. 68 (6): 2241–8. doi:10.1095/biolreprod.102.013466. PMID12606363.
↑Miki K, Eddy EM (December 1998). "Identification of tethering domains for protein kinase A type Ialpha regulatory subunits on sperm fibrous sheath protein FSC1". J. Biol. Chem. 273 (51): 34384–90. doi:10.1074/jbc.273.51.34384. PMID9852104.
↑Tortora G, Damiano V, Bianco C, Baldassarre G, Bianco AR, Lanfrancone L, Pelicci PG, Ciardiello F (February 1997). "The RIalpha subunit of protein kinase A (PKA) binds to Grb2 and allows PKA interaction with the activated EGF-receptor". Oncogene. 14 (8): 923–8. doi:10.1038/sj.onc.1200906. PMID9050991.
↑Küssel-Andermann P, El-Amraoui A, Safieddine S, Hardelin JP, Nouaille S, Camonis J, Petit C (September 2000). "Unconventional myosin VIIA is a novel A-kinase-anchoring protein". J. Biol. Chem. 275 (38): 29654–9. doi:10.1074/jbc.M004393200. PMID10889203.
↑Taskén K, Skålhegg BS, Solberg R, Andersson KB, Taylor SS, Lea T, Blomhoff HK, Jahnsen T, Hansson V (October 1993). "Novel isozymes of cAMP-dependent protein kinase exist in human cells due to formation of RI alpha-RI beta heterodimeric complexes". J. Biol. Chem. 268 (28): 21276–83. PMID8407966.
↑Ewing RM, Chu P, Elisma F, Li H, Taylor P, Climie S, McBroom-Cerajewski L, Robinson MD, O'Connor L, Li M, Taylor R, Dharsee M, Ho Y, Heilbut A, Moore L, Zhang S, Ornatsky O, Bukhman YV, Ethier M, Sheng Y, Vasilescu J, Abu-Farha M, Lambert JP, Duewel HS, Stewart II, Kuehl B, Hogue K, Colwill K, Gladwish K, Muskat B, Kinach R, Adams SL, Moran MF, Morin GB, Topaloglou T, Figeys D. "Large-scale mapping of human protein-protein interactions by mass spectrometry". Mol. Syst. Biol. 3: 89. doi:10.1038/msb4100134. PMC1847948. PMID17353931.
Further reading
Stratakis CA (2002). "Mutations of the gene encoding the protein kinase A type I-alpha regulatory subunit (PRKAR1A) in patients with the "complex of spotty skin pigmentation, myxomas, endocrine overactivity, and schwannomas" (Carney complex)". Ann. N. Y. Acad. Sci. 968: 3–21. doi:10.1111/j.1749-6632.2002.tb04323.x. PMID12119264.
Bourdeau I, Stratakis CA (2002). "Cyclic AMP-dependent signaling aberrations in macronodular adrenal disease". Ann. N. Y. Acad. Sci. 968: 240–55. doi:10.1111/j.1749-6632.2002.tb04339.x. PMID12119280.
Alto N, Carlisle Michel JJ, Dodge KL, Langeberg LK, Scott JD (2003). "Intracellular targeting of protein kinases and phosphatases". Diabetes. 51 Suppl 3: S385–8. doi:10.2337/diabetes.51.2007.s385. PMID12475780.
Stergiopoulos SG, Stratakis CA (2003). "Human tumors associated with Carney complex and germline PRKAR1A mutations: a protein kinase A disease!". FEBS Lett. 546 (1): 59–64. doi:10.1016/S0014-5793(03)00452-6. PMID12829237.
Bossis I, Stratakis CA (2004). "Minireview: PRKAR1A: normal and abnormal functions". Endocrinology. 145 (12): 5452–8. doi:10.1210/en.2004-0900. PMID15331577.
Cho-Chung YS, Nesterova MV (2006). "Tumor reversion: protein kinase A isozyme switching". Ann. N. Y. Acad. Sci. 1058: 76–86. doi:10.1196/annals.1359.014. PMID16394127.
Lytras A, Tolis G (2006). "Growth hormone-secreting tumors: genetic aspects and data from animal models". Neuroendocrinology. 83 (3–4): 166–78. doi:10.1159/000095525. PMID17047380.
Harrich D, McMillan N, Munoz L, Apolloni A, Meredith L (2007). "Will diverse Tat interactions lead to novel antiretroviral drug targets?". Current drug targets. 7 (12): 1595–606. doi:10.2174/138945006779025338. PMID17168834.
Boshart M, Weih F, Nichols M, Schütz G (1991). "The tissue-specific extinguisher locus TSE1 encodes a regulatory subunit of cAMP-dependent protein kinase". Cell. 66 (5): 849–59. doi:10.1016/0092-8674(91)90432-X. PMID1832337.
Jones KW, Shapero MH, Chevrette M, Fournier RE (1991). "Subtractive hybridization cloning of a tissue-specific extinguisher: TSE1 encodes a regulatory subunit of protein kinase A". Cell. 66 (5): 861–72. doi:10.1016/0092-8674(91)90433-Y. PMID1889088.
Hofmann B, Nishanian P, Baldwin RL, Insixiengmay P, Nel A, Fahey JL (1991). "HIV inhibits the early steps of lymphocyte activation, including initiation of inositol phospholipid metabolism". J. Immunol. 145 (11): 3699–705. PMID1978848.
Sandberg M, Skålhegg B, Jahnsen T (1990). "The two mRNA forms for the type I alpha regulatory subunit of cAMP-dependent protein kinase from human testis are due to the use of different polyadenylation site signals". Biochem. Biophys. Res. Commun. 167 (1): 323–30. doi:10.1016/0006-291X(90)91768-N. PMID2310396.
Sandberg M, Taskén K, Oyen O, Hansson V, Jahnsen T (1988). "Molecular cloning, cDNA structure and deduced amino acid sequence for a type I regulatory subunit of cAMP-dependent protein kinase from human testis". Biochem. Biophys. Res. Commun. 149 (3): 939–45. doi:10.1016/0006-291X(87)90499-2. PMID3426618.
Geahlen RL, Carmichael DF, Hashimoto E, Krebs EG (1982). "Phosphorylation of cAMP-dependent protein kinase subunits". Adv. Enzyme Regul. 20: 195–209. doi:10.1016/0065-2571(82)90016-4. PMID6287816.
Guild BC, Strominger JL (1984). "HLA-A2 antigen phosphorylation in vitro by cyclic AMP-dependent protein kinase. Sites of phosphorylation and segmentation in class i major histocompatibility complex gene structure". J. Biol. Chem. 259 (21): 13504–10. PMID6333425.
