{"gene":"PRKAR1A","run_date":"2026-06-10T06:43:35","timeline":{"discoveries":[{"year":1990,"finding":"TSE1/PRKAR1A-mediated transcriptional extinction operates through repression of basal PKA activity, reduced phosphorylation of CREB at Ser-133, and a corresponding reduction of in vivo protein binding at the cAMP response element (CRE) of the tyrosine aminotransferase hepatocyte-specific enhancer.","method":"Somatic cell hybrid genetics, in vivo footprinting, cAMP signaling assays","journal":"Cell","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — two independent Cell papers (1990 and 1991) using complementary genetic, biochemical, and in vivo footprinting approaches converging on the same mechanism","pmids":["1971524","1832337"],"is_preprint":false},{"year":1991,"finding":"The TSE1 locus on human chromosome 17 encodes the regulatory subunit RIα of cAMP-dependent protein kinase A (PKA); transfection of wild-type or cAMP-binding mutant RIα cDNA into hepatoma cells reproduces TSE1-mediated extinction of liver-specific genes, demonstrating that RIα is the TSE1 product.","method":"Subtractive cDNA hybridization cloning, high-resolution chromosomal mapping, stable transfection with wild-type and cAMP-binding mutant RIα constructs, mRNA correlation analysis","journal":"Cell","confidence":"High","confidence_rationale":"Tier 1 / Strong — two independent Cell papers (PMID 1832337 and 1889088) using cloning, mapping, and transfection with mutagenesis to identify and confirm the TSE1 product","pmids":["1832337","1889088"],"is_preprint":false},{"year":2000,"finding":"PRKAR1A mutations causing Carney complex are all functionally null; mutant mRNAs containing premature stop codons are eliminated by nonsense-mediated mRNA decay, and the predicted truncated PRKAR1A protein products are absent in patient cells, establishing PRKAR1A haploinsufficiency as the molecular mechanism.","method":"Genomic sequencing of 54 CNC kindreds, Northern blot/RT-PCR for NMD, immunoblot for protein absence, linkage analysis","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — large multi-family cohort, multiple orthogonal molecular methods (sequencing, NMD assay, protein blot), replicated in subsequent studies","pmids":["11115848"],"is_preprint":false},{"year":2002,"finding":"An expressed splice-site PRKAR1A mutation (IVS6+1G→T) causes exon 6 skipping, producing a shorter RIα protein that activates PKA signaling at the nuclear level; this demonstrates that altered (not absent) RIα function is sufficient to augment PKA activity and cause tumorigenesis without complete allelic loss.","method":"RT-PCR characterization of mutant mRNA, immunoblot detection of mutant protein in leukocytes and tumors, in vitro PKA signaling assays at nuclear level, LOH analysis","journal":"American journal of human genetics","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — mutant protein characterization combined with functional PKA assays and LOH analysis in a single rigorous study","pmids":["12424709"],"is_preprint":false},{"year":2003,"finding":"PRKAR1A-inactivating mutations in CNC/PPNAD cells lead to increased baseline and cAMP-stimulated PKA activity, decreased RIα protein, and loss of the normal PKA-mediated inhibition of the ERK1/2 (MAPK) pathway; in mutant cells, cAMP stimulation with forskolin or isoproterenol paradoxically increases LPA-induced ERK1/2 phosphorylation and cell proliferation instead of inhibiting them.","method":"PKA enzymatic activity assays, quantitative mRNA analysis, immunoblot of ERK1/2 phosphorylation, cell proliferation and metabolic assays, PKA inhibitor experiments in patient-derived lymphocytes and pituitary tumor cell line","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal assays (PKA activity, phospho-ERK blot, proliferation) in patient-derived cells and cell lines with PKA inhibitor validation","pmids":["12812976"],"is_preprint":false},{"year":2003,"finding":"Human PAP7 (PBR- and PKA-associated protein 7) physically interacts with PRKAR1A (RIα) and is co-expressed in steroidogenic tissues; PAP7 levels are decreased in CNC/PPNAD nodules in parallel with PRKAR1A, suggesting it participates in PRKAR1A-mediated steroidogenesis regulation.","method":"Molecular cloning, expression pattern analysis by IHC, Western blot in PPNAD and CNC lymphoblasts","journal":"FASEB journal","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — co-expression and co-decrease demonstrated by IHC and blot, but direct binding was established in prior mouse study cited; single lab, no reciprocal IP shown in this paper","pmids":["12692076"],"is_preprint":false},{"year":2003,"finding":"Somatic inactivating PRKAR1A mutations in sporadic adrenocortical tumors are associated with RIα down-regulation and higher PKA activity by enzymatic assay, establishing PKA dysregulation as a mechanism in sporadic adrenal tumorigenesis.","method":"PRKAR1A sequencing, FISH-based LOH analysis, quantitative mRNA and protein studies, PKA enzymatic activity assay","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — three somatic mutations identified with corroborating PKA activity measurements; single study, limited sample size","pmids":["14500362"],"is_preprint":false},{"year":2004,"finding":"Loss of Prkar1a function (via antisense transgene) in mice leads to increased total type II PKA activity and higher RIIβ protein levels, recapitulating the biochemical changes observed in Carney complex tumors with PRKAR1A-inactivating mutations.","method":"Transgenic mouse model (antisense Prkar1a exon 2), PKA activity assays, Western blot for PKA subunits, LOH analysis of mouse chromosome 11","journal":"Journal of medical genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo mouse model with biochemical validation confirmed by parallel data from human CNC tumors","pmids":["15591278"],"is_preprint":false},{"year":2006,"finding":"In PRKAR1A-mutant adrenocortical tissue, increased cAMP-stimulated PKA activity is accompanied by a 2.4-fold decrease in RIα mRNA, increased other PKA subunits, decreased baseline ERK1/2 with increased phospho-ERK1/2, and elevated B-Raf, phospho-MEK1/2, and phospho-c-Myc, but not phospho-Akt, indicating specific activation of the MAPK pathway without PI3K/Akt involvement.","method":"Quantitative RT-PCR, immunoblot of PKA subunits and MAPK components, PKA activity assays, immunohistochemistry on adrenocortical samples","journal":"The Journal of clinical endocrinology and metabolism","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods in human tissue; single lab, pathway specificity inferred from comparison with controls","pmids":["16569736"],"is_preprint":false},{"year":2006,"finding":"PRKAR1A inactivation in human B lymphocytes leads to increased ERK1/2 and B-Raf phosphorylation, MEK1/2 and c-Myc activation, inhibition of c-Raf-1, increased cell cycle rates, and decreased apoptosis, resulting in net proliferative gain; this occurs even with partial (heterozygous) RIα loss without loss of the second allele.","method":"Immunoblot of MAPK pathway components, cell cycle analysis, apoptosis assays in patient-derived lymphocytes with PRKAR1A-inactivating mutations","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple pathway and phenotypic readouts in patient-derived cells; single lab","pmids":["17079485"],"is_preprint":false},{"year":2007,"finding":"RIα localizes to Rab7-positive late endosomes and LC3-positive autophagosomal membranes; RIα physically interacts with mTOR kinase and affects its phosphorylation and activity, and mTOR co-localizes with RIα-, Rab7-, and LC3-positive membranes, placing the RIα–mTOR complex at autophagosome maturation.","method":"Confocal microscopy (GFP-tagged RIα), co-immunoprecipitation/physical interaction studies, phosphorylation assays of mTOR, subcellular fractionation","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2–3 / Moderate — live imaging localization with co-IP and phosphorylation assay; single lab, single study","pmids":["17204847"],"is_preprint":false},{"year":2007,"finding":"Complete pituitary-specific knockout of Prkar1a in the Pit1 lineage is sufficient to cause GH-secreting pituitary tumors and markedly elevated serum GH in mice, demonstrating that total Prkar1a loss in pituitary cells drives pituitary tumorigenesis.","method":"Tissue-specific Cre-lox knockout (GHRH receptor promoter-Cre × Prkar1a conditional null), serum GH measurements, tumor characterization by IHC","journal":"Molecular endocrinology","confidence":"High","confidence_rationale":"Tier 2 / Moderate — clean tissue-specific KO with defined tumor phenotype and biochemical validation; single lab but rigorous KO model","pmids":["17975024"],"is_preprint":false},{"year":2007,"finding":"Prkar1a null primary mouse embryonic fibroblasts with constitutive PKA signaling undergo mesenchymal-to-epithelial transition (MET), with loss of vimentin (occurring at the posttranslational level, rescued by proteasomal inhibition) and up-regulation of E-cadherin; this MET was confirmed in neural crest-specific Prkar1a KO schwannomas and in adrenal nodules of CNC patients.","method":"Neural crest-specific Prkar1a KO mice, primary MEF cultures, vimentin/E-cadherin immunoblot, proteasome inhibitor rescue experiments, IHC of CNC patient adrenal nodules","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 2 / Strong — posttranslational mechanism defined by proteasomal inhibitor rescue, validated in both mouse model and human tissue","pmids":["18413734"],"is_preprint":false},{"year":2007,"finding":"Tissue-specific ablation of Prkar1a in neural crest precursor cells causes schwannomas featuring near-complete loss of both NF1 and NF2 (Merlin) proteins despite increased transcript levels, indicating posttranscriptional regulation; Rac1 is activated in these tumors whereas ERK and Akt signaling are not.","method":"Neural crest-specific Prkar1a KO (TEC3KO), immunoblot for NF1/NF2 proteins and transcripts, small GTPase activation assays, histopathology","journal":"Neoplasia","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo KO model with molecular pathway analysis; single lab","pmids":["18953430"],"is_preprint":false},{"year":2007,"finding":"Prkar1a (+/-) mouse bone tumor cells show decreased Prkar1a protein and increased PKA activity; Wnt signaling pathway members are up-regulated and markers of bone differentiation are down-regulated, and tumor cells exhibit enhanced growth in response to PKA-stimulating agents.","method":"Prkar1a(+/-) mouse model, primary bone tumor cell cultures, IHC, PKA activity assays, gene expression analysis, xenograft in immunocompromised mice","journal":"Molecular endocrinology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo and in vitro correlation with biochemical validation; single lab","pmids":["17932105"],"is_preprint":false},{"year":2008,"finding":"An expressed PRKAR1A mutation (IVS6+1G>T, producing RIαΔ6 lacking exon 6 sequences) leads to diffuse cytoplasmic RIα without discrete aggregates, absence of binding to the PKA catalytic subunit (Cα) at baseline and after cAMP stimulation, decreased nuclear Cα, and increased PKA activity without an increase in type II PKA subunits.","method":"Confocal microscopy with GFP-tagged RIα and Cerulean-tagged Cα, PKA activity assays, immunoblot of PKA subunits, transfection of mutant vs. wild-type constructs in cells","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — live-cell imaging, direct binding assay, PKA activity measurement, and morphological readout combined in one study","pmids":["18451138"],"is_preprint":false},{"year":2008,"finding":"Seven expressed PRKAR1A mutations not subject to NMD (p.Ser9Asn, p.Glu60_Lys116del, p.Arg74Cys, p.Arg146Ser, p.Asp183Tyr, p.Ala213Asp, p.Gly289Trp), spread across all functional RIα domains, all exhibit increased PKA activity attributable to decreased binding to cAMP and/or the catalytic subunit.","method":"In vitro functional assays of PKA activity, cAMP binding assays, mutagenesis with domain mapping, transfection studies","journal":"Human mutation","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro reconstitution with multiple mutations across domains and direct cAMP/catalytic-subunit binding measurements","pmids":["18241045"],"is_preprint":false},{"year":2008,"finding":"A large PRKAR1A deletion removing exon 3 produces an expressed shorter protein lacking the primary site for interaction with the PKA catalytic subunit; in vitro transfection studies showed impaired cAMP binding and activation of PKA, and this mutation was associated with a more severe CNC phenotype than haploinsufficiency mutations.","method":"Southern hybridization for large deletion detection, in vitro transfection of mutant PRKAR1A, PKA activity and cAMP binding assays","journal":"Clinical cancer research","confidence":"Medium","confidence_rationale":"Tier 1–2 / Moderate — in vitro functional assay with domain characterization; single lab","pmids":["18223213"],"is_preprint":false},{"year":2008,"finding":"Cardiac-specific knockout of Prkar1a causes embryonic death at E11.5–12.5 with thin-walled dilated hearts, elevated PKA activity, decreased cardiomyocyte proliferation, down-regulation of cardiac transcription factors (SRF, Gata4, Nkx2-5), and myxomatous degeneration in specific areas of the heart wall.","method":"Cre-lox cardiac-specific KO, PKA activity assays, IHC for transcription factors, histopathology for myxomatous changes","journal":"Circulation","confidence":"High","confidence_rationale":"Tier 2 / Moderate — clean tissue-specific KO with mechanistic biochemical and transcription factor pathway analysis; single lab but rigorous model","pmids":["18316483"],"is_preprint":false},{"year":2009,"finding":"PRKAR1A-RARα fusion protein in APL transforms bone marrow progenitor/stem cells; it binds retinoic acid response elements as a homodimer and as a heterodimer with RXRα; the RIIa domain mediates homodimerization and interaction with wild-type RIα but is not required for transformation; leukemic transformation critically depends on RXRα interaction.","method":"Murine bone marrow retroviral transduction/transformation assay, gel-shift assays, point mutations in RARα portion, RXRα shRNA knockdown, RXRα agonist treatment","journal":"Blood","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — transformation assay combined with DNA-binding, domain mutagenesis, and RXRα depletion experiments in one rigorous study","pmids":["19965660"],"is_preprint":false},{"year":2010,"finding":"Adrenal cortex-specific Prkar1a knockout mice develop Cushing's syndrome with increased PKA activity, autonomous steroidogenic gene expression, increased proliferation, resistance to apoptosis, and improper maintenance of fetal adrenocortical cells with centrifugal expansion, demonstrating that RIα loss alone is sufficient to initiate PPNAD.","method":"Adrenal cortex-specific Cre-lox Prkar1a KO, PKA activity assays, steroidogenic gene expression profiling, histopathology, cell proliferation and apoptosis assays","journal":"PLoS genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — tissue-specific KO with multiple orthogonal mechanistic readouts; published in high-impact journal with comprehensive phenotyping","pmids":["20548949"],"is_preprint":false},{"year":2010,"finding":"Prkar1a haploinsufficiency activates the Wnt signaling pathway and causes cell cycle dysregulation (via CCND1, E2F1, CDK4); siRNA knockdown of Ctnnb1, E2f1, or Cdk4 inhibits proliferation of PRKAR1A-mutant human adrenal cells and arrests them at G0/G1, placing Wnt/cell cycle activation downstream of PRKAR1A loss.","method":"Whole-genome transcriptome profiling, qRT-PCR array, IHC, siRNA epistasis experiments with G0/G1 cell cycle arrest readout in human adrenal cells and Prkar1a(+/-) MEFs","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Moderate — epistasis via siRNA with cell cycle readout, validated by transcriptomics and IHC across multiple mouse tumor models","pmids":["20080939"],"is_preprint":false},{"year":2010,"finding":"Prkar1a is a bone tumor suppressor gene; its deletions in mouse OSA define a molecularly distinct subclass featuring RANKL overexpression, and mouse genetics established that Prkar1a loss is sufficient to direct this subclass and drive RANKL overexpression during OSA tumorigenesis.","method":"Mouse OSA model with integrative oncogenomics (SNP array CGH), mouse genetic epistasis, gene expression analysis for RANKL","journal":"The Journal of clinical investigation","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — mouse genetic model with integrative genomics; RANKL mechanism inferred from expression rather than direct mechanistic assay","pmids":["20697156"],"is_preprint":false},{"year":2010,"finding":"Simultaneous siRNA inactivation of both PRKAR1A and PDE11A leads to an increase in cAMP-regulatory element-mediated transcriptional activity under basal conditions and after forskolin stimulation, establishing functional interaction between these two cAMP pathway regulators.","method":"siRNA dual knockdown of PRKAR1A and PDE11A, CRE-luciferase reporter assay","journal":"The Journal of clinical endocrinology and metabolism","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — reporter assay with dual knockdown, single lab and single method","pmids":["21047926"],"is_preprint":false},{"year":2011,"finding":"PRKAR1A mutations that cause frameshift in the last coding exon (predicted to escape NMD) produce elongated proteins that are absent in patient cells due to proteasomal degradation; proteasome inhibitors rescue detection of the aberrant proteins in transfected cells, adding protein surveillance to NMD as a cellular mechanism ensuring RIα haploinsufficiency.","method":"Site-directed mutagenesis, in vitro transcription/translation, transfection in adrenal/testicular/embryonic cells, Western blot with and without proteasome inhibitors, patient cell analysis","journal":"The Journal of clinical endocrinology and metabolism","confidence":"High","confidence_rationale":"Tier 1 / Moderate — mutagenesis combined with cell-free translation, transfection system, and proteasome inhibitor rescue in multiple cell types","pmids":["22205709"],"is_preprint":false},{"year":2011,"finding":"Genetic reduction of the PKA catalytic subunit Prkaca (Cα) rescues the embryonic lethality of cardiac Prkar1a KO and suppresses schwannoma formation in neural crest Prkar1a KO mice; reduction of Prkacb has minimal cardiac rescue and only ~80% schwannoma suppression, demonstrating that developmental and tumor phenotypes caused by Prkar1a mutation are primarily driven by excess PKA-Cα activity.","method":"Genetic epistasis using double KO of Prkar1a with Prkaca or Prkacb null alleles, PKA activity biochemical assays, tumor incidence analysis","journal":"Molecular endocrinology","confidence":"High","confidence_rationale":"Tier 2 / Moderate — clean genetic epistasis in two independent tissue-specific KO contexts with biochemical validation; single lab","pmids":["21852354"],"is_preprint":false},{"year":2011,"finding":"The S147G PRKAR1A missense mutation leads to decreased cAMP binding and decreased catalytic subunit binding by RIα, resulting in increased PKA activity in vitro, without loss of heterozygosity in the associated adrenocortical cancer.","method":"In vitro PKA activity assays, cAMP binding assays, catalytic subunit binding assays, LOH analysis in tumor tissue","journal":"The Journal of clinical endocrinology and metabolism","confidence":"Medium","confidence_rationale":"Tier 1 / Weak — direct binding and activity assays; single family, small sample","pmids":["22112814"],"is_preprint":false},{"year":2012,"finding":"Activated Rac1 downstream of PKA (activated by Prkar1a loss) suppresses NF2/Merlin protein production in Schwann cells through a Pak-dependent mechanism; genetic double KO of Prkar1a and Rac1 reduces tumor formation with re-expression of Nf2, and activated Rac1 can downregulate Nf2 in vitro, revealing bidirectional NF2–Rac1 signaling modulated by PKA.","method":"Double KO mouse genetics (Prkar1a × Rac1 in Schwann cells), tumor incidence analysis, proliferation/apoptosis assays, in vitro Rac1 activation of Nf2 downregulation, Pak inhibitor experiments","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 / Moderate — in vivo genetic epistasis combined with in vitro mechanistic validation of Pak-dependent Nf2 suppression; single lab","pmids":["23045281"],"is_preprint":false},{"year":2012,"finding":"PRKAR1A inactivation leads to compartment-specific alterations in cAMP/PKA signaling: RIα knockdown increases PKA activity in the cytoplasm and at the outer mitochondrial membrane, but decreases PKA response and increases basal PKA activity at the plasma membrane; cAMP is increased in all compartments tested.","method":"FRET-based cAMP and PKA activity reporters (AKAR3 and Epac1-camps) targeted to cytoplasm, outer mitochondrial membrane, and plasma membrane; Western blot of phospho-VASP; siRNA knockdown; human adrenal cells with RIα mutation","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 1 / Moderate — genetically encoded FRET sensors with subcellular targeting, validated by orthogonal western blot in both engineered cells and patient-derived human adrenal cells","pmids":["24122441"],"is_preprint":false},{"year":2012,"finding":"A novel PRKAR1A mutation p.T239A at cAMP-binding domain A causes acrodysostosis with hormone resistance by impairing the protein kinase A response to cAMP; CRE-binding protein phosphorylation is markedly reduced in patient lymphoblastoid cells stimulated with forskolin, and CRE-luciferase reporter assays demonstrate significantly impaired PKA response to cAMP from the mutant protein.","method":"Western blot of phospho-CREB in patient lymphoblastoid cells, CRE-luciferase reporter assay in HEK293 cells transfected with mutant p.T239A protein","journal":"The Journal of clinical endocrinology and metabolism","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — functional assays in patient cells and transfection system; single lab, single mutation","pmids":["22723333"],"is_preprint":false},{"year":2013,"finding":"Prkar1a knockdown in mouse and human osteoblastic cells suppresses osteogenic differentiation, bone nodule formation, and expression of osteocalcin/osteopontin; mechanistically, Prkar1a ablation represses DNA binding and transcriptional activity of Runx2 by reducing levels of cooperating transcription factors FOXO1 and ATF4.","method":"Stable Prkar1a knockdown, osteogenic differentiation assays, chromatin immunoprecipitation (ChIP), luciferase reporter assays, qRT-PCR of osteoblast markers","journal":"Molecular endocrinology","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — ChIP and luciferase assays defining the Runx2 mechanism, validated in both mouse and human cells","pmids":["24506536"],"is_preprint":false},{"year":2013,"finding":"Prkar1a loss in Schwann cells causes a persistent axonal sorting defect, decreased Schwann cell proliferation in vivo (cell-autonomous, recapitulated in vitro), premature myelination with increased Oct-6 and myelin basic protein, revealing essential roles of PKA (elevated by Prkar1a KO) in axon sorting and SC proliferation control.","method":"Schwann cell-specific Prkar1a conditional KO, in vivo nerve histology, in vitro SC cultures with PKA activity measurement, IHC for Oct-6 and MBP","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Moderate — tissue-specific KO with cell-autonomous in vitro validation and biochemical PKA activity measurement; single lab","pmids":["24227708"],"is_preprint":false},{"year":2014,"finding":"Prkar1a loss in mouse thyrocytes causes PKA and mTOR dual activation; combined thyroid-specific Prkar1a and Pten double KO develops follicular thyroid cancer recapitulating human FTC with strong activation of both PKA (pCREB) and mTOR pathways, confirmed in human FTC samples.","method":"Tissue-specific double KO (Prkar1a × Pten in thyroid), IHC for pCREB, pAKT, pERK, pmTOR in mouse and human FTC, gene expression profiling","journal":"The Journal of clinical endocrinology and metabolism","confidence":"High","confidence_rationale":"Tier 2 / Moderate — double KO mouse model with pathway validation in human tumors; single lab but orthogonal mouse/human comparison","pmids":["24512487"],"is_preprint":false},{"year":2014,"finding":"Loss of Prkar1a transcriptionally activates several pro-apoptotic Bcl-2 family members causing cell death; combined loss of Bim and Prkar1a increases colony formation and tumor growth in immunodeficient mice, establishing that Prkar1a-mediated apoptosis through Bim must be overcome for tumorigenesis.","method":"Genetically modified mice with Prkar1a loss, Prkar1a × Bim double KO, colony formation assay, xenograft in immunodeficient mice, gene expression analysis of Bcl-2 family","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 2 / Moderate — genetic epistasis with in vivo tumorigenesis assay and expression profiling; single lab","pmids":["25012505"],"is_preprint":false},{"year":2014,"finding":"PRKAR1A depletion in adrenocortical H295R cells leads to accumulation of cyclin D1 and p27kip (distinct from PRKAR2B depletion which accumulates cyclins A, B, cdk1, cdc2, and p21Cip); both depletions activate PKA and MEK/ERK pathways, impair IκB leading to NF-κB activation, and promote Bcl-xL expression and apoptosis resistance, but with different cyclin profiles.","method":"siRNA knockdown of PRKAR1A vs. PRKAR2B, cell cycle analysis, apoptosis assays, Western blot of cyclins/CDKs and signaling molecules","journal":"Hormone and metabolic research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — comparative siRNA knockdown with multiple pathway readouts; single lab, single cell line","pmids":["25268545"],"is_preprint":false},{"year":2015,"finding":"All acrodysostosis-causing PRKAR1A mutations impair cAMP binding to the domain containing the mutation (verified by domain-specific cAMP analogs and BRET dissociation assay), constituting a single shared molecular mechanism; Carney complex mutations at homologous positions share cAMP resistance but additionally cause accelerated PRKAR1A protein degradation, explaining their distinct and more severe phenotype.","method":"CRE-luciferase reporter assay (forskolin-induced PKA activation), BRET assay (cAMP-induced PRKAR1A–catalytic subunit dissociation), domain-specific cAMP analogs (domain A: 8-piperidino-cAMP; domain B: 8-AHA-cAMP), protein stability/degradation assays, molecular modeling","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — multiple orthogonal in vitro assays (reporter, BRET, analog specificity, degradation) rigorously dissecting two distinct molecular mechanisms in one study","pmids":["26405036"],"is_preprint":false},{"year":2016,"finding":"Pancreas-specific Prkar1a knockout (pdx1-Cre) leads to endocrine or mixed endocrine/acinar cell carcinomas with 100% penetrance by 4–5 months, with high PKA activity, supporting Prkar1a as a tumor suppressor gene in the pancreas acting through the PKA pathway.","method":"Pdx1-Cre-driven Prkar1a KO, PKA activity assays, histopathology, electron microscopy, IHC for neuroendocrine markers","journal":"Endocrine-related cancer","confidence":"High","confidence_rationale":"Tier 2 / Moderate — tissue-specific KO with biochemical PKA validation and comprehensive tumor characterization; single lab","pmids":["27803029"],"is_preprint":false},{"year":2016,"finding":"PRKAR1A knockdown in lung adenocarcinoma A549 cells activates ERK/Snail signaling, which inhibits E-cadherin expression; re-expression of PRKAR1A suppresses cell proliferation and migration; elevated E-cadherin rescues the proliferation and migration phenotype induced by PRKAR1A knockdown, placing PRKAR1A upstream of an ERK–Snail–E-cadherin axis.","method":"Stable shRNA knockdown and re-expression of PRKAR1A in lung adenocarcinoma cells, proliferation and migration assays in vitro and in vivo (xenograft, circulating tumor cell colonization), E-cadherin overexpression rescue experiment, Western blot of ERK/Snail/E-cadherin","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — KD with re-expression rescue and epistasis via E-cadherin overexpression; single lab, epithelial cancer context","pmids":["27995993"],"is_preprint":false},{"year":2007,"finding":"In a cell line bearing an inactivating PRKAR1A mutation (IVS2+1 G→A), introduction of PKA subunits alters cell cycle: wild-type PRKAR1A transfection decreases aneuploidy and G2/M; PRKAR2B, mutant RIαP, or catalytic subunit transfection increases S phase and aneuploidy. E2F1 was identified as a mediator of PKA effects on cell cycle by siRNA epistasis.","method":"Stable transfection of PKA subunits into PRKAR1A-mutant immortalized cell line, cell cycle analysis, siRNA knockdown of E2F1, cyclin/E2F expression analysis, cAMP level measurement","journal":"The Journal of clinical endocrinology and metabolism","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — transfection combined with siRNA epistasis in patient-derived cell line; single lab","pmids":["18056771"],"is_preprint":false},{"year":2010,"finding":"Neural crest-specific Prkar1a inactivation causes perinatal lethality from dysmorphic craniofacial development with anomalous intramembranous ossification; genetic reduction of PKA catalytic subunit Cα rescues the phenotype whereas Cβ reduction has no effect, demonstrating that excess Cα-mediated PKA activity is responsible for craniofacial bone defects.","method":"Neural crest-specific Prkar1a Cre-lox KO, genetic epistasis with Prkaca and Prkacb null alleles, histopathology of craniofacial bones","journal":"Molecular endocrinology","confidence":"High","confidence_rationale":"Tier 2 / Moderate — genetic epistasis distinguishing Cα vs. Cβ roles in a tissue-specific KO context; single lab","pmids":["20534695"],"is_preprint":false}],"current_model":"PRKAR1A encodes the type 1α regulatory subunit (RIα) of cAMP-dependent protein kinase A (PKA); it acts as a tumor suppressor by sequestering and inhibiting the PKA catalytic subunit (primarily Cα), thereby restraining PKA activity in a compartment-specific manner; inactivating mutations (haploinsufficiency via NMD, proteasomal degradation of elongated mutants, or expressed dominant-negative proteins with impaired cAMP/catalytic-subunit binding) cause constitutive PKA activation that drives tumorigenesis in multiple tissues by reversing ERK1/2 inhibition, activating Wnt/β-catenin and NF-κB signaling, dysregulating cyclin/CDK-mediated cell cycle entry through E2F1, suppressing NF2/Merlin via Rac1–Pak signaling, promoting mesenchymal-to-epithelial transition through proteasomal vimentin degradation, and impairing terminal differentiation programs; the same constitutive PKA activity mediates transcriptional repression of liver-specific genes (TSE1 function) through reduced CREB phosphorylation at the CRE."},"narrative":{"mechanistic_narrative":"PRKAR1A encodes RIα, the type Iα regulatory subunit of cAMP-dependent protein kinase A (PKA), which restrains PKA activity by sequestering and inhibiting the catalytic subunit and is released upon cAMP binding [PMID:18241045, PMID:24122441]. It was first identified as the TSE1 gene product mediating tissue-specific transcriptional extinction of liver genes through suppression of basal PKA, reduced CREB Ser-133 phosphorylation, and lost occupancy at the CRE [PMID:1971524, PMID:1832337, PMID:1889088]. PRKAR1A functions as a tumor suppressor: germline inactivating mutations cause Carney complex, operating predominantly through haploinsufficiency enforced by nonsense-mediated decay of premature-stop transcripts and proteasomal degradation of elongated escapee proteins, while expressed missense and splice mutations act by impairing cAMP and/or catalytic-subunit binding to raise PKA activity [PMID:11115848, PMID:18241045, PMID:22205709]. Constitutive PKA activation downstream of RIα loss is driven primarily by excess catalytic subunit Cα, since genetic reduction of Cα rescues both developmental lethality and tumorigenesis [PMID:21852354, PMID:20534695]. The resulting unrestrained PKA signaling reverses normal PKA-mediated inhibition of the ERK1/2/MAPK cascade, activates Wnt/β-catenin and NF-κB signaling, and dysregulates cell-cycle entry via cyclin D1, E2F1, and CDK4 [PMID:12812976, PMID:20080939, PMID:25268545]. In specific lineages it suppresses NF2/Merlin through Rac1–Pak signaling [PMID:23045281], drives proteasome-dependent vimentin loss producing mesenchymal-to-epithelial transition [PMID:18413734, PMID:27995993], impairs Runx2-dependent osteogenic differentiation [PMID:24506536], and must overcome Bim-mediated apoptosis to permit transformation [PMID:25012505]. Tissue-specific knockouts establish RIα loss as sufficient to initiate tumors of the adrenal cortex, pituitary, pancreas, thyroid, bone, and peripheral nerve and to cause embryonic cardiac failure [PMID:17975024, PMID:18316483, PMID:20548949, PMID:27803029]. Distinct PRKAR1A mutations that impair cAMP binding without accelerated degradation instead cause acrodysostosis with hormone resistance [PMID:22723333, PMID:26405036].","teleology":[{"year":1991,"claim":"Established the molecular identity of the tissue-specific extinguisher TSE1 as the PKA regulatory subunit RIα and showed it represses liver-specific transcription by lowering basal PKA activity and CREB phosphorylation at the CRE.","evidence":"Somatic cell hybrid genetics, subtractive cDNA cloning, in vivo footprinting, and transfection of wild-type/cAMP-binding mutant RIα in hepatoma cells","pmids":["1971524","1832337","1889088"],"confidence":"High","gaps":["Did not address the gene's role in disease or tumorigenesis","Mechanism beyond CREB/CRE not explored"]},{"year":2000,"claim":"Defined the disease mechanism of Carney complex as PRKAR1A haploinsufficiency, showing premature-stop transcripts are eliminated by NMD and truncated proteins are absent in patient cells.","evidence":"Genomic sequencing of 54 CNC kindreds with NMD assays, immunoblot for protein absence, and linkage analysis","pmids":["11115848"],"confidence":"High","gaps":["Did not establish downstream PKA-driven oncogenic pathways","Did not address mutations that escape NMD"]},{"year":2002,"claim":"Demonstrated that altered (not absent) RIα can augment nuclear PKA activity, showing dominant mechanisms beyond simple haploinsufficiency.","evidence":"RT-PCR and immunoblot of an exon-6-skipping splice mutant plus in vitro PKA assays and LOH analysis in patient tumors","pmids":["12424709"],"confidence":"High","gaps":["Did not resolve catalytic-subunit binding behavior of the mutant","Single mutation context"]},{"year":2003,"claim":"Linked PRKAR1A inactivation to paradoxical activation of the ERK1/2 MAPK pathway, identifying the first oncogenic signaling consequence of elevated PKA, and extended PKA dysregulation to sporadic adrenal tumors.","evidence":"PKA enzymatic assays, phospho-ERK immunoblots, proliferation assays with PKA inhibitor validation in patient-derived cells; sequencing and FISH in sporadic adrenocortical tumors","pmids":["12812976","14500362"],"confidence":"High","gaps":["Mechanism converting cAMP/PKA signal into ERK activation not defined","Tissue specificity of the paradoxical ERK response unclear"]},{"year":2003,"claim":"Identified PAP7 as an RIα-interacting partner co-regulated in steroidogenic tissue, and placed RIα/mTOR complexes at autophagosomal membranes, expanding RIα interactions beyond canonical PKA.","evidence":"Cloning, IHC, and immunoblot in PPNAD/CNC tissue (PAP7); confocal imaging, co-IP, and mTOR phosphorylation assays on Rab7/LC3 membranes","pmids":["12692076","17204847"],"confidence":"Medium","gaps":["PAP7 interaction lacked reciprocal IP in this work","RIα–mTOR functional consequence for autophagy not established","Single-lab observations"]},{"year":2008,"claim":"Catalogued the in vitro functional defects of expressed PRKAR1A mutations, showing they raise PKA activity by impairing cAMP and/or catalytic-subunit binding across all RIα domains, and demonstrated loss of Cα binding with reduced nuclear Cα for the exon-6-deleted mutant.","evidence":"In vitro PKA activity, cAMP-binding and catalytic-subunit binding assays with domain-mapping mutagenesis; live-cell imaging of GFP-RIα/Cerulean-Cα","pmids":["18241045","18451138","18223213"],"confidence":"High","gaps":["Did not link each mutation to specific tissue phenotypes","Structural basis of binding loss inferred from modeling"]},{"year":2008,"claim":"Established RIα loss as sufficient to drive lineage-specific phenotypes in vivo — pituitary GH tumors, embryonic cardiac failure with loss of cardiac transcription factors, and mesenchymal-to-epithelial transition via proteasomal vimentin degradation.","evidence":"Tissue-specific Cre-lox Prkar1a knockouts (Pit1 lineage, cardiac, neural crest) with PKA assays, IHC, and proteasome-inhibitor rescue in primary MEFs","pmids":["17975024","18316483","18413734"],"confidence":"High","gaps":["E3 ligase mediating vimentin degradation not identified","Why phenotypes differ by tissue not mechanistically resolved"]},{"year":2009,"claim":"Showed that a PRKAR1A-RARα fusion transforms hematopoietic progenitors in APL, with leukemic transformation depending critically on RXRα interaction rather than the RIα dimerization domain.","evidence":"Murine bone marrow retroviral transformation assay, gel-shift DNA binding, domain mutagenesis, and RXRα shRNA knockdown","pmids":["19965660"],"confidence":"High","gaps":["Relationship of fusion oncogenesis to native RIα tumor-suppressor function unclear","Downstream transcriptional targets not mapped"]},{"year":2010,"claim":"Defined oncogenic effector pathways downstream of PKA activation — Wnt/β-catenin and CCND1/E2F1/CDK4-driven cell-cycle entry, RANKL overexpression in bone, and craniofacial ossification defects rescued specifically by Cα reduction.","evidence":"Transcriptome profiling with siRNA epistasis and G0/G1 arrest readouts; mouse OSA oncogenomics; adrenal-specific KO with steroidogenic profiling; neural crest KO with Prkaca/Prkacb genetic epistasis","pmids":["20080939","20697156","20548949","20534695"],"confidence":"High","gaps":["How PKA selectively engages Wnt versus other effectors per tissue unresolved","RANKL regulation inferred from expression not direct mechanism"]},{"year":2011,"claim":"Demonstrated that proteasomal degradation of NMD-escaping elongated mutant proteins acts as a second surveillance layer enforcing haploinsufficiency, and that excess Cα (not Cβ) is the primary driver of Prkar1a-loss phenotypes.","evidence":"Mutagenesis with cell-free translation and proteasome-inhibitor rescue; genetic epistasis of Prkar1a with Prkaca/Prkacb null alleles in cardiac and schwannoma KO models","pmids":["22205709","21852354"],"confidence":"High","gaps":["Identity of the degradation machinery for elongated RIα not specified","Residual Cβ contribution to schwannoma not fully eliminated"]},{"year":2012,"claim":"Resolved how RIα loss reshapes spatial cAMP/PKA signaling and identified Rac1–Pak-mediated NF2/Merlin suppression as the schwannoma effector pathway.","evidence":"Compartment-targeted FRET cAMP/PKA reporters with phospho-VASP validation in patient adrenal cells; Prkar1a×Rac1 double-KO genetics with Pak inhibitor experiments","pmids":["24122441","23045281"],"confidence":"High","gaps":["Mechanism creating opposing plasma-membrane vs cytoplasmic PKA responses unclear","Posttranscriptional route from Rac1 to Merlin loss incompletely defined"]},{"year":2013,"claim":"Connected RIα loss to impaired terminal differentiation, showing PKA activation represses Runx2 transcriptional activity by reducing FOXO1 and ATF4, and disrupts Schwann cell axon sorting and proliferation control.","evidence":"Prkar1a knockdown osteoblast differentiation assays with ChIP and luciferase reporters; Schwann cell-specific KO with in vivo nerve histology and PKA assays","pmids":["24506536","24227708"],"confidence":"High","gaps":["How PKA reduces FOXO1/ATF4 levels not defined","Link between differentiation block and tumorigenesis not directly tested"]},{"year":2014,"claim":"Integrated PKA with mTOR and NF-κB/apoptotic control: Prkar1a loss co-activates PKA and mTOR to drive thyroid cancer, dysregulates cyclin/NF-κB/Bcl-xL programs, and induces Bim-dependent apoptosis that must be overcome for transformation.","evidence":"Prkar1a×Pten thyroid double KO with pathway IHC in mouse/human FTC; comparative PRKAR1A vs PRKAR2B siRNA with cyclin/NF-κB readouts; Prkar1a×Bim double KO with xenografts","pmids":["24512487","25268545","25012505"],"confidence":"High","gaps":["Direct PKA substrates linking to mTOR not identified","Mechanism of pro-apoptotic Bcl-2 family transcriptional activation unclear"]},{"year":2015,"claim":"Distinguished the molecular basis of two PRKAR1A diseases: acrodysostosis mutations impair domain-specific cAMP binding alone, while Carney complex mutations at homologous positions add accelerated protein degradation, explaining their more severe phenotype.","evidence":"CRE-luciferase and BRET dissociation assays with domain-specific cAMP analogs, protein-stability assays, and molecular modeling; phospho-CREB and reporter assays for the p.T239A acrodysostosis mutant","pmids":["26405036","22723333"],"confidence":"High","gaps":["Why differential degradation occurs for homologous positions not explained","Tissue determinants of acrodysostosis vs CNC phenotype unresolved"]},{"year":2016,"claim":"Extended the tumor-suppressor role to additional epithelial tissues, demonstrating pancreatic carcinoma with full penetrance after RIα loss and an ERK–Snail–E-cadherin axis controlling proliferation and migration in lung adenocarcinoma.","evidence":"Pdx1-Cre Prkar1a KO with PKA assays and tumor characterization; shRNA knockdown/re-expression with E-cadherin rescue and xenograft assays in A549 cells","pmids":["27803029","27995993"],"confidence":"High","gaps":["Whether sporadic human pancreatic/lung tumors carry PRKAR1A defects not established here","Direct PKA targets in the Snail axis not identified"]},{"year":null,"claim":"How a single regulatory subunit loss produces such divergent tissue-specific effectors (Wnt, Rac1–Merlin, Runx2, mTOR, Bim) remains unresolved, as does the spatial logic that channels excess Cα activity to distinct compartments and substrates.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unifying model linking compartmentalized PKA activity to tissue-specific effector selection","Direct PKA substrates for most downstream pathways unmapped","E3 ligases mediating vimentin and mutant-RIα degradation unidentified"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[16,28,15]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[16,25,4]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,1,30]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[28,15]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[28]},{"term_id":"GO:0005768","term_label":"endosome","supporting_discovery_ids":[10]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[3,15]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[4,28,21]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[2,11,20]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[21,34,38]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[33,34]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0,1,30]}],"complexes":["PKA holoenzyme"],"partners":["PRKACA","PRKACB","MTOR","RXRA"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P10644","full_name":"cAMP-dependent protein kinase type I-alpha regulatory subunit","aliases":["Tissue-specific extinguisher 1","TSE1"],"length_aa":381,"mass_kda":43.0,"function":"Regulatory subunit of the cAMP-dependent protein kinases involved in cAMP signaling in cells","subcellular_location":"Cell membrane","url":"https://www.uniprot.org/uniprotkb/P10644/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/PRKAR1A","classification":"Not Classified","n_dependent_lines":206,"n_total_lines":1208,"dependency_fraction":0.17052980132450332},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"PRKACA","stoichiometry":10.0},{"gene":"GSK3A","stoichiometry":4.0},{"gene":"VAPA","stoichiometry":0.2},{"gene":"VAPB","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/PRKAR1A","total_profiled":1310},"omim":[{"mim_id":"616427","title":"A-KINASE ANCHOR INHIBITOR 1; AKAIN1","url":"https://www.omim.org/entry/616427"},{"mim_id":"615810","title":"BETA-KETO-L-GULONATE DECARBOXYLASE; BKGD","url":"https://www.omim.org/entry/615810"},{"mim_id":"615117","title":"A-KINASE ANCHOR PROTEIN 19; AKAP19","url":"https://www.omim.org/entry/615117"},{"mim_id":"614613","title":"ACRODYSOSTOSIS 2 WITH OR WITHOUT HORMONE RESISTANCE; ACRDYS2","url":"https://www.omim.org/entry/614613"},{"mim_id":"613514","title":"ZONA PELLUCIDA GLYCOPROTEIN 4; ZP4","url":"https://www.omim.org/entry/613514"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Cytosol","reliability":"Approved"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/PRKAR1A"},"hgnc":{"alias_symbol":["CNC1"],"prev_symbol":["PRKAR1","TSE1","PKR1","Prkar1alpha"]},"alphafold":{"accession":"P10644","domains":[{"cath_id":"2.60.120.10","chopping":"110-233","consensus_level":"high","plddt":94.0867,"start":110,"end":233},{"cath_id":"2.60.120.10","chopping":"252-377","consensus_level":"high","plddt":86.7412,"start":252,"end":377}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P10644","model_url":"https://alphafold.ebi.ac.uk/files/AF-P10644-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P10644-F1-predicted_aligned_error_v6.png","plddt_mean":87.75},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=PRKAR1A","jax_strain_url":"https://www.jax.org/strain/search?query=PRKAR1A"},"sequence":{"accession":"P10644","fasta_url":"https://rest.uniprot.org/uniprotkb/P10644.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P10644/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P10644"}},"corpus_meta":[{"pmid":"11115848","id":"PMC_11115848","title":"Genetic 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transfection of wild-type or cAMP-binding mutant RIα cDNA into hepatoma cells reproduces TSE1-mediated extinction of liver-specific genes, demonstrating that RIα is the TSE1 product.\",\n      \"method\": \"Subtractive cDNA hybridization cloning, high-resolution chromosomal mapping, stable transfection with wild-type and cAMP-binding mutant RIα constructs, mRNA correlation analysis\",\n      \"journal\": \"Cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — two independent Cell papers (PMID 1832337 and 1889088) using cloning, mapping, and transfection with mutagenesis to identify and confirm the TSE1 product\",\n      \"pmids\": [\"1832337\", \"1889088\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"PRKAR1A mutations causing Carney complex are all functionally null; mutant mRNAs containing premature stop codons are eliminated by nonsense-mediated mRNA decay, and the predicted truncated PRKAR1A protein products are absent in patient cells, establishing PRKAR1A haploinsufficiency as the molecular mechanism.\",\n      \"method\": \"Genomic sequencing of 54 CNC kindreds, Northern blot/RT-PCR for NMD, immunoblot for protein absence, linkage analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — large multi-family cohort, multiple orthogonal molecular methods (sequencing, NMD assay, protein blot), replicated in subsequent studies\",\n      \"pmids\": [\"11115848\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"An expressed splice-site PRKAR1A mutation (IVS6+1G→T) causes exon 6 skipping, producing a shorter RIα protein that activates PKA signaling at the nuclear level; this demonstrates that altered (not absent) RIα function is sufficient to augment PKA activity and cause tumorigenesis without complete allelic loss.\",\n      \"method\": \"RT-PCR characterization of mutant mRNA, immunoblot detection of mutant protein in leukocytes and tumors, in vitro PKA signaling assays at nuclear level, LOH analysis\",\n      \"journal\": \"American journal of human genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — mutant protein characterization combined with functional PKA assays and LOH analysis in a single rigorous study\",\n      \"pmids\": [\"12424709\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"PRKAR1A-inactivating mutations in CNC/PPNAD cells lead to increased baseline and cAMP-stimulated PKA activity, decreased RIα protein, and loss of the normal PKA-mediated inhibition of the ERK1/2 (MAPK) pathway; in mutant cells, cAMP stimulation with forskolin or isoproterenol paradoxically increases LPA-induced ERK1/2 phosphorylation and cell proliferation instead of inhibiting them.\",\n      \"method\": \"PKA enzymatic activity assays, quantitative mRNA analysis, immunoblot of ERK1/2 phosphorylation, cell proliferation and metabolic assays, PKA inhibitor experiments in patient-derived lymphocytes and pituitary tumor cell line\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal assays (PKA activity, phospho-ERK blot, proliferation) in patient-derived cells and cell lines with PKA inhibitor validation\",\n      \"pmids\": [\"12812976\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Human PAP7 (PBR- and PKA-associated protein 7) physically interacts with PRKAR1A (RIα) and is co-expressed in steroidogenic tissues; PAP7 levels are decreased in CNC/PPNAD nodules in parallel with PRKAR1A, suggesting it participates in PRKAR1A-mediated steroidogenesis regulation.\",\n      \"method\": \"Molecular cloning, expression pattern analysis by IHC, Western blot in PPNAD and CNC lymphoblasts\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — co-expression and co-decrease demonstrated by IHC and blot, but direct binding was established in prior mouse study cited; single lab, no reciprocal IP shown in this paper\",\n      \"pmids\": [\"12692076\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Somatic inactivating PRKAR1A mutations in sporadic adrenocortical tumors are associated with RIα down-regulation and higher PKA activity by enzymatic assay, establishing PKA dysregulation as a mechanism in sporadic adrenal tumorigenesis.\",\n      \"method\": \"PRKAR1A sequencing, FISH-based LOH analysis, quantitative mRNA and protein studies, PKA enzymatic activity assay\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — three somatic mutations identified with corroborating PKA activity measurements; single study, limited sample size\",\n      \"pmids\": [\"14500362\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Loss of Prkar1a function (via antisense transgene) in mice leads to increased total type II PKA activity and higher RIIβ protein levels, recapitulating the biochemical changes observed in Carney complex tumors with PRKAR1A-inactivating mutations.\",\n      \"method\": \"Transgenic mouse model (antisense Prkar1a exon 2), PKA activity assays, Western blot for PKA subunits, LOH analysis of mouse chromosome 11\",\n      \"journal\": \"Journal of medical genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo mouse model with biochemical validation confirmed by parallel data from human CNC tumors\",\n      \"pmids\": [\"15591278\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"In PRKAR1A-mutant adrenocortical tissue, increased cAMP-stimulated PKA activity is accompanied by a 2.4-fold decrease in RIα mRNA, increased other PKA subunits, decreased baseline ERK1/2 with increased phospho-ERK1/2, and elevated B-Raf, phospho-MEK1/2, and phospho-c-Myc, but not phospho-Akt, indicating specific activation of the MAPK pathway without PI3K/Akt involvement.\",\n      \"method\": \"Quantitative RT-PCR, immunoblot of PKA subunits and MAPK components, PKA activity assays, immunohistochemistry on adrenocortical samples\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods in human tissue; single lab, pathway specificity inferred from comparison with controls\",\n      \"pmids\": [\"16569736\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"PRKAR1A inactivation in human B lymphocytes leads to increased ERK1/2 and B-Raf phosphorylation, MEK1/2 and c-Myc activation, inhibition of c-Raf-1, increased cell cycle rates, and decreased apoptosis, resulting in net proliferative gain; this occurs even with partial (heterozygous) RIα loss without loss of the second allele.\",\n      \"method\": \"Immunoblot of MAPK pathway components, cell cycle analysis, apoptosis assays in patient-derived lymphocytes with PRKAR1A-inactivating mutations\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple pathway and phenotypic readouts in patient-derived cells; single lab\",\n      \"pmids\": [\"17079485\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"RIα localizes to Rab7-positive late endosomes and LC3-positive autophagosomal membranes; RIα physically interacts with mTOR kinase and affects its phosphorylation and activity, and mTOR co-localizes with RIα-, Rab7-, and LC3-positive membranes, placing the RIα–mTOR complex at autophagosome maturation.\",\n      \"method\": \"Confocal microscopy (GFP-tagged RIα), co-immunoprecipitation/physical interaction studies, phosphorylation assays of mTOR, subcellular fractionation\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2–3 / Moderate — live imaging localization with co-IP and phosphorylation assay; single lab, single study\",\n      \"pmids\": [\"17204847\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Complete pituitary-specific knockout of Prkar1a in the Pit1 lineage is sufficient to cause GH-secreting pituitary tumors and markedly elevated serum GH in mice, demonstrating that total Prkar1a loss in pituitary cells drives pituitary tumorigenesis.\",\n      \"method\": \"Tissue-specific Cre-lox knockout (GHRH receptor promoter-Cre × Prkar1a conditional null), serum GH measurements, tumor characterization by IHC\",\n      \"journal\": \"Molecular endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean tissue-specific KO with defined tumor phenotype and biochemical validation; single lab but rigorous KO model\",\n      \"pmids\": [\"17975024\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Prkar1a null primary mouse embryonic fibroblasts with constitutive PKA signaling undergo mesenchymal-to-epithelial transition (MET), with loss of vimentin (occurring at the posttranslational level, rescued by proteasomal inhibition) and up-regulation of E-cadherin; this MET was confirmed in neural crest-specific Prkar1a KO schwannomas and in adrenal nodules of CNC patients.\",\n      \"method\": \"Neural crest-specific Prkar1a KO mice, primary MEF cultures, vimentin/E-cadherin immunoblot, proteasome inhibitor rescue experiments, IHC of CNC patient adrenal nodules\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — posttranslational mechanism defined by proteasomal inhibitor rescue, validated in both mouse model and human tissue\",\n      \"pmids\": [\"18413734\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Tissue-specific ablation of Prkar1a in neural crest precursor cells causes schwannomas featuring near-complete loss of both NF1 and NF2 (Merlin) proteins despite increased transcript levels, indicating posttranscriptional regulation; Rac1 is activated in these tumors whereas ERK and Akt signaling are not.\",\n      \"method\": \"Neural crest-specific Prkar1a KO (TEC3KO), immunoblot for NF1/NF2 proteins and transcripts, small GTPase activation assays, histopathology\",\n      \"journal\": \"Neoplasia\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo KO model with molecular pathway analysis; single lab\",\n      \"pmids\": [\"18953430\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Prkar1a (+/-) mouse bone tumor cells show decreased Prkar1a protein and increased PKA activity; Wnt signaling pathway members are up-regulated and markers of bone differentiation are down-regulated, and tumor cells exhibit enhanced growth in response to PKA-stimulating agents.\",\n      \"method\": \"Prkar1a(+/-) mouse model, primary bone tumor cell cultures, IHC, PKA activity assays, gene expression analysis, xenograft in immunocompromised mice\",\n      \"journal\": \"Molecular endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo and in vitro correlation with biochemical validation; single lab\",\n      \"pmids\": [\"17932105\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"An expressed PRKAR1A mutation (IVS6+1G>T, producing RIαΔ6 lacking exon 6 sequences) leads to diffuse cytoplasmic RIα without discrete aggregates, absence of binding to the PKA catalytic subunit (Cα) at baseline and after cAMP stimulation, decreased nuclear Cα, and increased PKA activity without an increase in type II PKA subunits.\",\n      \"method\": \"Confocal microscopy with GFP-tagged RIα and Cerulean-tagged Cα, PKA activity assays, immunoblot of PKA subunits, transfection of mutant vs. wild-type constructs in cells\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — live-cell imaging, direct binding assay, PKA activity measurement, and morphological readout combined in one study\",\n      \"pmids\": [\"18451138\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Seven expressed PRKAR1A mutations not subject to NMD (p.Ser9Asn, p.Glu60_Lys116del, p.Arg74Cys, p.Arg146Ser, p.Asp183Tyr, p.Ala213Asp, p.Gly289Trp), spread across all functional RIα domains, all exhibit increased PKA activity attributable to decreased binding to cAMP and/or the catalytic subunit.\",\n      \"method\": \"In vitro functional assays of PKA activity, cAMP binding assays, mutagenesis with domain mapping, transfection studies\",\n      \"journal\": \"Human mutation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro reconstitution with multiple mutations across domains and direct cAMP/catalytic-subunit binding measurements\",\n      \"pmids\": [\"18241045\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"A large PRKAR1A deletion removing exon 3 produces an expressed shorter protein lacking the primary site for interaction with the PKA catalytic subunit; in vitro transfection studies showed impaired cAMP binding and activation of PKA, and this mutation was associated with a more severe CNC phenotype than haploinsufficiency mutations.\",\n      \"method\": \"Southern hybridization for large deletion detection, in vitro transfection of mutant PRKAR1A, PKA activity and cAMP binding assays\",\n      \"journal\": \"Clinical cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — in vitro functional assay with domain characterization; single lab\",\n      \"pmids\": [\"18223213\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Cardiac-specific knockout of Prkar1a causes embryonic death at E11.5–12.5 with thin-walled dilated hearts, elevated PKA activity, decreased cardiomyocyte proliferation, down-regulation of cardiac transcription factors (SRF, Gata4, Nkx2-5), and myxomatous degeneration in specific areas of the heart wall.\",\n      \"method\": \"Cre-lox cardiac-specific KO, PKA activity assays, IHC for transcription factors, histopathology for myxomatous changes\",\n      \"journal\": \"Circulation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean tissue-specific KO with mechanistic biochemical and transcription factor pathway analysis; single lab but rigorous model\",\n      \"pmids\": [\"18316483\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"PRKAR1A-RARα fusion protein in APL transforms bone marrow progenitor/stem cells; it binds retinoic acid response elements as a homodimer and as a heterodimer with RXRα; the RIIa domain mediates homodimerization and interaction with wild-type RIα but is not required for transformation; leukemic transformation critically depends on RXRα interaction.\",\n      \"method\": \"Murine bone marrow retroviral transduction/transformation assay, gel-shift assays, point mutations in RARα portion, RXRα shRNA knockdown, RXRα agonist treatment\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — transformation assay combined with DNA-binding, domain mutagenesis, and RXRα depletion experiments in one rigorous study\",\n      \"pmids\": [\"19965660\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Adrenal cortex-specific Prkar1a knockout mice develop Cushing's syndrome with increased PKA activity, autonomous steroidogenic gene expression, increased proliferation, resistance to apoptosis, and improper maintenance of fetal adrenocortical cells with centrifugal expansion, demonstrating that RIα loss alone is sufficient to initiate PPNAD.\",\n      \"method\": \"Adrenal cortex-specific Cre-lox Prkar1a KO, PKA activity assays, steroidogenic gene expression profiling, histopathology, cell proliferation and apoptosis assays\",\n      \"journal\": \"PLoS genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — tissue-specific KO with multiple orthogonal mechanistic readouts; published in high-impact journal with comprehensive phenotyping\",\n      \"pmids\": [\"20548949\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Prkar1a haploinsufficiency activates the Wnt signaling pathway and causes cell cycle dysregulation (via CCND1, E2F1, CDK4); siRNA knockdown of Ctnnb1, E2f1, or Cdk4 inhibits proliferation of PRKAR1A-mutant human adrenal cells and arrests them at G0/G1, placing Wnt/cell cycle activation downstream of PRKAR1A loss.\",\n      \"method\": \"Whole-genome transcriptome profiling, qRT-PCR array, IHC, siRNA epistasis experiments with G0/G1 cell cycle arrest readout in human adrenal cells and Prkar1a(+/-) MEFs\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — epistasis via siRNA with cell cycle readout, validated by transcriptomics and IHC across multiple mouse tumor models\",\n      \"pmids\": [\"20080939\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Prkar1a is a bone tumor suppressor gene; its deletions in mouse OSA define a molecularly distinct subclass featuring RANKL overexpression, and mouse genetics established that Prkar1a loss is sufficient to direct this subclass and drive RANKL overexpression during OSA tumorigenesis.\",\n      \"method\": \"Mouse OSA model with integrative oncogenomics (SNP array CGH), mouse genetic epistasis, gene expression analysis for RANKL\",\n      \"journal\": \"The Journal of clinical investigation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — mouse genetic model with integrative genomics; RANKL mechanism inferred from expression rather than direct mechanistic assay\",\n      \"pmids\": [\"20697156\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Simultaneous siRNA inactivation of both PRKAR1A and PDE11A leads to an increase in cAMP-regulatory element-mediated transcriptional activity under basal conditions and after forskolin stimulation, establishing functional interaction between these two cAMP pathway regulators.\",\n      \"method\": \"siRNA dual knockdown of PRKAR1A and PDE11A, CRE-luciferase reporter assay\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — reporter assay with dual knockdown, single lab and single method\",\n      \"pmids\": [\"21047926\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"PRKAR1A mutations that cause frameshift in the last coding exon (predicted to escape NMD) produce elongated proteins that are absent in patient cells due to proteasomal degradation; proteasome inhibitors rescue detection of the aberrant proteins in transfected cells, adding protein surveillance to NMD as a cellular mechanism ensuring RIα haploinsufficiency.\",\n      \"method\": \"Site-directed mutagenesis, in vitro transcription/translation, transfection in adrenal/testicular/embryonic cells, Western blot with and without proteasome inhibitors, patient cell analysis\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — mutagenesis combined with cell-free translation, transfection system, and proteasome inhibitor rescue in multiple cell types\",\n      \"pmids\": [\"22205709\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Genetic reduction of the PKA catalytic subunit Prkaca (Cα) rescues the embryonic lethality of cardiac Prkar1a KO and suppresses schwannoma formation in neural crest Prkar1a KO mice; reduction of Prkacb has minimal cardiac rescue and only ~80% schwannoma suppression, demonstrating that developmental and tumor phenotypes caused by Prkar1a mutation are primarily driven by excess PKA-Cα activity.\",\n      \"method\": \"Genetic epistasis using double KO of Prkar1a with Prkaca or Prkacb null alleles, PKA activity biochemical assays, tumor incidence analysis\",\n      \"journal\": \"Molecular endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean genetic epistasis in two independent tissue-specific KO contexts with biochemical validation; single lab\",\n      \"pmids\": [\"21852354\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"The S147G PRKAR1A missense mutation leads to decreased cAMP binding and decreased catalytic subunit binding by RIα, resulting in increased PKA activity in vitro, without loss of heterozygosity in the associated adrenocortical cancer.\",\n      \"method\": \"In vitro PKA activity assays, cAMP binding assays, catalytic subunit binding assays, LOH analysis in tumor tissue\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Weak — direct binding and activity assays; single family, small sample\",\n      \"pmids\": [\"22112814\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Activated Rac1 downstream of PKA (activated by Prkar1a loss) suppresses NF2/Merlin protein production in Schwann cells through a Pak-dependent mechanism; genetic double KO of Prkar1a and Rac1 reduces tumor formation with re-expression of Nf2, and activated Rac1 can downregulate Nf2 in vitro, revealing bidirectional NF2–Rac1 signaling modulated by PKA.\",\n      \"method\": \"Double KO mouse genetics (Prkar1a × Rac1 in Schwann cells), tumor incidence analysis, proliferation/apoptosis assays, in vitro Rac1 activation of Nf2 downregulation, Pak inhibitor experiments\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo genetic epistasis combined with in vitro mechanistic validation of Pak-dependent Nf2 suppression; single lab\",\n      \"pmids\": [\"23045281\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"PRKAR1A inactivation leads to compartment-specific alterations in cAMP/PKA signaling: RIα knockdown increases PKA activity in the cytoplasm and at the outer mitochondrial membrane, but decreases PKA response and increases basal PKA activity at the plasma membrane; cAMP is increased in all compartments tested.\",\n      \"method\": \"FRET-based cAMP and PKA activity reporters (AKAR3 and Epac1-camps) targeted to cytoplasm, outer mitochondrial membrane, and plasma membrane; Western blot of phospho-VASP; siRNA knockdown; human adrenal cells with RIα mutation\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — genetically encoded FRET sensors with subcellular targeting, validated by orthogonal western blot in both engineered cells and patient-derived human adrenal cells\",\n      \"pmids\": [\"24122441\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"A novel PRKAR1A mutation p.T239A at cAMP-binding domain A causes acrodysostosis with hormone resistance by impairing the protein kinase A response to cAMP; CRE-binding protein phosphorylation is markedly reduced in patient lymphoblastoid cells stimulated with forskolin, and CRE-luciferase reporter assays demonstrate significantly impaired PKA response to cAMP from the mutant protein.\",\n      \"method\": \"Western blot of phospho-CREB in patient lymphoblastoid cells, CRE-luciferase reporter assay in HEK293 cells transfected with mutant p.T239A protein\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional assays in patient cells and transfection system; single lab, single mutation\",\n      \"pmids\": [\"22723333\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Prkar1a knockdown in mouse and human osteoblastic cells suppresses osteogenic differentiation, bone nodule formation, and expression of osteocalcin/osteopontin; mechanistically, Prkar1a ablation represses DNA binding and transcriptional activity of Runx2 by reducing levels of cooperating transcription factors FOXO1 and ATF4.\",\n      \"method\": \"Stable Prkar1a knockdown, osteogenic differentiation assays, chromatin immunoprecipitation (ChIP), luciferase reporter assays, qRT-PCR of osteoblast markers\",\n      \"journal\": \"Molecular endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — ChIP and luciferase assays defining the Runx2 mechanism, validated in both mouse and human cells\",\n      \"pmids\": [\"24506536\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Prkar1a loss in Schwann cells causes a persistent axonal sorting defect, decreased Schwann cell proliferation in vivo (cell-autonomous, recapitulated in vitro), premature myelination with increased Oct-6 and myelin basic protein, revealing essential roles of PKA (elevated by Prkar1a KO) in axon sorting and SC proliferation control.\",\n      \"method\": \"Schwann cell-specific Prkar1a conditional KO, in vivo nerve histology, in vitro SC cultures with PKA activity measurement, IHC for Oct-6 and MBP\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — tissue-specific KO with cell-autonomous in vitro validation and biochemical PKA activity measurement; single lab\",\n      \"pmids\": [\"24227708\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Prkar1a loss in mouse thyrocytes causes PKA and mTOR dual activation; combined thyroid-specific Prkar1a and Pten double KO develops follicular thyroid cancer recapitulating human FTC with strong activation of both PKA (pCREB) and mTOR pathways, confirmed in human FTC samples.\",\n      \"method\": \"Tissue-specific double KO (Prkar1a × Pten in thyroid), IHC for pCREB, pAKT, pERK, pmTOR in mouse and human FTC, gene expression profiling\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — double KO mouse model with pathway validation in human tumors; single lab but orthogonal mouse/human comparison\",\n      \"pmids\": [\"24512487\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Loss of Prkar1a transcriptionally activates several pro-apoptotic Bcl-2 family members causing cell death; combined loss of Bim and Prkar1a increases colony formation and tumor growth in immunodeficient mice, establishing that Prkar1a-mediated apoptosis through Bim must be overcome for tumorigenesis.\",\n      \"method\": \"Genetically modified mice with Prkar1a loss, Prkar1a × Bim double KO, colony formation assay, xenograft in immunodeficient mice, gene expression analysis of Bcl-2 family\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis with in vivo tumorigenesis assay and expression profiling; single lab\",\n      \"pmids\": [\"25012505\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"PRKAR1A depletion in adrenocortical H295R cells leads to accumulation of cyclin D1 and p27kip (distinct from PRKAR2B depletion which accumulates cyclins A, B, cdk1, cdc2, and p21Cip); both depletions activate PKA and MEK/ERK pathways, impair IκB leading to NF-κB activation, and promote Bcl-xL expression and apoptosis resistance, but with different cyclin profiles.\",\n      \"method\": \"siRNA knockdown of PRKAR1A vs. PRKAR2B, cell cycle analysis, apoptosis assays, Western blot of cyclins/CDKs and signaling molecules\",\n      \"journal\": \"Hormone and metabolic research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — comparative siRNA knockdown with multiple pathway readouts; single lab, single cell line\",\n      \"pmids\": [\"25268545\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"All acrodysostosis-causing PRKAR1A mutations impair cAMP binding to the domain containing the mutation (verified by domain-specific cAMP analogs and BRET dissociation assay), constituting a single shared molecular mechanism; Carney complex mutations at homologous positions share cAMP resistance but additionally cause accelerated PRKAR1A protein degradation, explaining their distinct and more severe phenotype.\",\n      \"method\": \"CRE-luciferase reporter assay (forskolin-induced PKA activation), BRET assay (cAMP-induced PRKAR1A–catalytic subunit dissociation), domain-specific cAMP analogs (domain A: 8-piperidino-cAMP; domain B: 8-AHA-cAMP), protein stability/degradation assays, molecular modeling\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — multiple orthogonal in vitro assays (reporter, BRET, analog specificity, degradation) rigorously dissecting two distinct molecular mechanisms in one study\",\n      \"pmids\": [\"26405036\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Pancreas-specific Prkar1a knockout (pdx1-Cre) leads to endocrine or mixed endocrine/acinar cell carcinomas with 100% penetrance by 4–5 months, with high PKA activity, supporting Prkar1a as a tumor suppressor gene in the pancreas acting through the PKA pathway.\",\n      \"method\": \"Pdx1-Cre-driven Prkar1a KO, PKA activity assays, histopathology, electron microscopy, IHC for neuroendocrine markers\",\n      \"journal\": \"Endocrine-related cancer\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — tissue-specific KO with biochemical PKA validation and comprehensive tumor characterization; single lab\",\n      \"pmids\": [\"27803029\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"PRKAR1A knockdown in lung adenocarcinoma A549 cells activates ERK/Snail signaling, which inhibits E-cadherin expression; re-expression of PRKAR1A suppresses cell proliferation and migration; elevated E-cadherin rescues the proliferation and migration phenotype induced by PRKAR1A knockdown, placing PRKAR1A upstream of an ERK–Snail–E-cadherin axis.\",\n      \"method\": \"Stable shRNA knockdown and re-expression of PRKAR1A in lung adenocarcinoma cells, proliferation and migration assays in vitro and in vivo (xenograft, circulating tumor cell colonization), E-cadherin overexpression rescue experiment, Western blot of ERK/Snail/E-cadherin\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — KD with re-expression rescue and epistasis via E-cadherin overexpression; single lab, epithelial cancer context\",\n      \"pmids\": [\"27995993\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"In a cell line bearing an inactivating PRKAR1A mutation (IVS2+1 G→A), introduction of PKA subunits alters cell cycle: wild-type PRKAR1A transfection decreases aneuploidy and G2/M; PRKAR2B, mutant RIαP, or catalytic subunit transfection increases S phase and aneuploidy. E2F1 was identified as a mediator of PKA effects on cell cycle by siRNA epistasis.\",\n      \"method\": \"Stable transfection of PKA subunits into PRKAR1A-mutant immortalized cell line, cell cycle analysis, siRNA knockdown of E2F1, cyclin/E2F expression analysis, cAMP level measurement\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — transfection combined with siRNA epistasis in patient-derived cell line; single lab\",\n      \"pmids\": [\"18056771\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Neural crest-specific Prkar1a inactivation causes perinatal lethality from dysmorphic craniofacial development with anomalous intramembranous ossification; genetic reduction of PKA catalytic subunit Cα rescues the phenotype whereas Cβ reduction has no effect, demonstrating that excess Cα-mediated PKA activity is responsible for craniofacial bone defects.\",\n      \"method\": \"Neural crest-specific Prkar1a Cre-lox KO, genetic epistasis with Prkaca and Prkacb null alleles, histopathology of craniofacial bones\",\n      \"journal\": \"Molecular endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis distinguishing Cα vs. Cβ roles in a tissue-specific KO context; single lab\",\n      \"pmids\": [\"20534695\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"PRKAR1A encodes the type 1α regulatory subunit (RIα) of cAMP-dependent protein kinase A (PKA); it acts as a tumor suppressor by sequestering and inhibiting the PKA catalytic subunit (primarily Cα), thereby restraining PKA activity in a compartment-specific manner; inactivating mutations (haploinsufficiency via NMD, proteasomal degradation of elongated mutants, or expressed dominant-negative proteins with impaired cAMP/catalytic-subunit binding) cause constitutive PKA activation that drives tumorigenesis in multiple tissues by reversing ERK1/2 inhibition, activating Wnt/β-catenin and NF-κB signaling, dysregulating cyclin/CDK-mediated cell cycle entry through E2F1, suppressing NF2/Merlin via Rac1–Pak signaling, promoting mesenchymal-to-epithelial transition through proteasomal vimentin degradation, and impairing terminal differentiation programs; the same constitutive PKA activity mediates transcriptional repression of liver-specific genes (TSE1 function) through reduced CREB phosphorylation at the CRE.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"PRKAR1A encodes RIα, the type Iα regulatory subunit of cAMP-dependent protein kinase A (PKA), which restrains PKA activity by sequestering and inhibiting the catalytic subunit and is released upon cAMP binding [#16, #28]. It was first identified as the TSE1 gene product mediating tissue-specific transcriptional extinction of liver genes through suppression of basal PKA, reduced CREB Ser-133 phosphorylation, and lost occupancy at the CRE [#0, #1]. PRKAR1A functions as a tumor suppressor: germline inactivating mutations cause Carney complex, operating predominantly through haploinsufficiency enforced by nonsense-mediated decay of premature-stop transcripts and proteasomal degradation of elongated escapee proteins, while expressed missense and splice mutations act by impairing cAMP and/or catalytic-subunit binding to raise PKA activity [#2, #16, #24]. Constitutive PKA activation downstream of RIα loss is driven primarily by excess catalytic subunit Cα, since genetic reduction of Cα rescues both developmental lethality and tumorigenesis [#25, #39]. The resulting unrestrained PKA signaling reverses normal PKA-mediated inhibition of the ERK1/2/MAPK cascade, activates Wnt/β-catenin and NF-κB signaling, and dysregulates cell-cycle entry via cyclin D1, E2F1, and CDK4 [#4, #21, #34]. In specific lineages it suppresses NF2/Merlin through Rac1–Pak signaling [#27], drives proteasome-dependent vimentin loss producing mesenchymal-to-epithelial transition [#12, #37], impairs Runx2-dependent osteogenic differentiation [#30], and must overcome Bim-mediated apoptosis to permit transformation [#33]. Tissue-specific knockouts establish RIα loss as sufficient to initiate tumors of the adrenal cortex, pituitary, pancreas, thyroid, bone, and peripheral nerve and to cause embryonic cardiac failure [#11, #18, #20, #36]. Distinct PRKAR1A mutations that impair cAMP binding without accelerated degradation instead cause acrodysostosis with hormone resistance [#29, #35].\"\n  ,\n  \"teleology\": [\n    {\n      \"year\": 1991,\n      \"claim\": \"Established the molecular identity of the tissue-specific extinguisher TSE1 as the PKA regulatory subunit RIα and showed it represses liver-specific transcription by lowering basal PKA activity and CREB phosphorylation at the CRE.\",\n      \"evidence\": \"Somatic cell hybrid genetics, subtractive cDNA cloning, in vivo footprinting, and transfection of wild-type/cAMP-binding mutant RIα in hepatoma cells\",\n      \"pmids\": [\"1971524\", \"1832337\", \"1889088\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not address the gene's role in disease or tumorigenesis\", \"Mechanism beyond CREB/CRE not explored\"]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Defined the disease mechanism of Carney complex as PRKAR1A haploinsufficiency, showing premature-stop transcripts are eliminated by NMD and truncated proteins are absent in patient cells.\",\n      \"evidence\": \"Genomic sequencing of 54 CNC kindreds with NMD assays, immunoblot for protein absence, and linkage analysis\",\n      \"pmids\": [\"11115848\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not establish downstream PKA-driven oncogenic pathways\", \"Did not address mutations that escape NMD\"]\n    },\n    {\n      \"year\": 2002,\n      \"claim\": \"Demonstrated that altered (not absent) RIα can augment nuclear PKA activity, showing dominant mechanisms beyond simple haploinsufficiency.\",\n      \"evidence\": \"RT-PCR and immunoblot of an exon-6-skipping splice mutant plus in vitro PKA assays and LOH analysis in patient tumors\",\n      \"pmids\": [\"12424709\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not resolve catalytic-subunit binding behavior of the mutant\", \"Single mutation context\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Linked PRKAR1A inactivation to paradoxical activation of the ERK1/2 MAPK pathway, identifying the first oncogenic signaling consequence of elevated PKA, and extended PKA dysregulation to sporadic adrenal tumors.\",\n      \"evidence\": \"PKA enzymatic assays, phospho-ERK immunoblots, proliferation assays with PKA inhibitor validation in patient-derived cells; sequencing and FISH in sporadic adrenocortical tumors\",\n      \"pmids\": [\"12812976\", \"14500362\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism converting cAMP/PKA signal into ERK activation not defined\", \"Tissue specificity of the paradoxical ERK response unclear\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Identified PAP7 as an RIα-interacting partner co-regulated in steroidogenic tissue, and placed RIα/mTOR complexes at autophagosomal membranes, expanding RIα interactions beyond canonical PKA.\",\n      \"evidence\": \"Cloning, IHC, and immunoblot in PPNAD/CNC tissue (PAP7); confocal imaging, co-IP, and mTOR phosphorylation assays on Rab7/LC3 membranes\",\n      \"pmids\": [\"12692076\", \"17204847\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"PAP7 interaction lacked reciprocal IP in this work\", \"RIα–mTOR functional consequence for autophagy not established\", \"Single-lab observations\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Catalogued the in vitro functional defects of expressed PRKAR1A mutations, showing they raise PKA activity by impairing cAMP and/or catalytic-subunit binding across all RIα domains, and demonstrated loss of Cα binding with reduced nuclear Cα for the exon-6-deleted mutant.\",\n      \"evidence\": \"In vitro PKA activity, cAMP-binding and catalytic-subunit binding assays with domain-mapping mutagenesis; live-cell imaging of GFP-RIα/Cerulean-Cα\",\n      \"pmids\": [\"18241045\", \"18451138\", \"18223213\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not link each mutation to specific tissue phenotypes\", \"Structural basis of binding loss inferred from modeling\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Established RIα loss as sufficient to drive lineage-specific phenotypes in vivo — pituitary GH tumors, embryonic cardiac failure with loss of cardiac transcription factors, and mesenchymal-to-epithelial transition via proteasomal vimentin degradation.\",\n      \"evidence\": \"Tissue-specific Cre-lox Prkar1a knockouts (Pit1 lineage, cardiac, neural crest) with PKA assays, IHC, and proteasome-inhibitor rescue in primary MEFs\",\n      \"pmids\": [\"17975024\", \"18316483\", \"18413734\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"E3 ligase mediating vimentin degradation not identified\", \"Why phenotypes differ by tissue not mechanistically resolved\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Showed that a PRKAR1A-RARα fusion transforms hematopoietic progenitors in APL, with leukemic transformation depending critically on RXRα interaction rather than the RIα dimerization domain.\",\n      \"evidence\": \"Murine bone marrow retroviral transformation assay, gel-shift DNA binding, domain mutagenesis, and RXRα shRNA knockdown\",\n      \"pmids\": [\"19965660\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Relationship of fusion oncogenesis to native RIα tumor-suppressor function unclear\", \"Downstream transcriptional targets not mapped\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Defined oncogenic effector pathways downstream of PKA activation — Wnt/β-catenin and CCND1/E2F1/CDK4-driven cell-cycle entry, RANKL overexpression in bone, and craniofacial ossification defects rescued specifically by Cα reduction.\",\n      \"evidence\": \"Transcriptome profiling with siRNA epistasis and G0/G1 arrest readouts; mouse OSA oncogenomics; adrenal-specific KO with steroidogenic profiling; neural crest KO with Prkaca/Prkacb genetic epistasis\",\n      \"pmids\": [\"20080939\", \"20697156\", \"20548949\", \"20534695\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How PKA selectively engages Wnt versus other effectors per tissue unresolved\", \"RANKL regulation inferred from expression not direct mechanism\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Demonstrated that proteasomal degradation of NMD-escaping elongated mutant proteins acts as a second surveillance layer enforcing haploinsufficiency, and that excess Cα (not Cβ) is the primary driver of Prkar1a-loss phenotypes.\",\n      \"evidence\": \"Mutagenesis with cell-free translation and proteasome-inhibitor rescue; genetic epistasis of Prkar1a with Prkaca/Prkacb null alleles in cardiac and schwannoma KO models\",\n      \"pmids\": [\"22205709\", \"21852354\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of the degradation machinery for elongated RIα not specified\", \"Residual Cβ contribution to schwannoma not fully eliminated\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Resolved how RIα loss reshapes spatial cAMP/PKA signaling and identified Rac1–Pak-mediated NF2/Merlin suppression as the schwannoma effector pathway.\",\n      \"evidence\": \"Compartment-targeted FRET cAMP/PKA reporters with phospho-VASP validation in patient adrenal cells; Prkar1a×Rac1 double-KO genetics with Pak inhibitor experiments\",\n      \"pmids\": [\"24122441\", \"23045281\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism creating opposing plasma-membrane vs cytoplasmic PKA responses unclear\", \"Posttranscriptional route from Rac1 to Merlin loss incompletely defined\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Connected RIα loss to impaired terminal differentiation, showing PKA activation represses Runx2 transcriptional activity by reducing FOXO1 and ATF4, and disrupts Schwann cell axon sorting and proliferation control.\",\n      \"evidence\": \"Prkar1a knockdown osteoblast differentiation assays with ChIP and luciferase reporters; Schwann cell-specific KO with in vivo nerve histology and PKA assays\",\n      \"pmids\": [\"24506536\", \"24227708\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How PKA reduces FOXO1/ATF4 levels not defined\", \"Link between differentiation block and tumorigenesis not directly tested\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Integrated PKA with mTOR and NF-κB/apoptotic control: Prkar1a loss co-activates PKA and mTOR to drive thyroid cancer, dysregulates cyclin/NF-κB/Bcl-xL programs, and induces Bim-dependent apoptosis that must be overcome for transformation.\",\n      \"evidence\": \"Prkar1a×Pten thyroid double KO with pathway IHC in mouse/human FTC; comparative PRKAR1A vs PRKAR2B siRNA with cyclin/NF-κB readouts; Prkar1a×Bim double KO with xenografts\",\n      \"pmids\": [\"24512487\", \"25268545\", \"25012505\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct PKA substrates linking to mTOR not identified\", \"Mechanism of pro-apoptotic Bcl-2 family transcriptional activation unclear\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Distinguished the molecular basis of two PRKAR1A diseases: acrodysostosis mutations impair domain-specific cAMP binding alone, while Carney complex mutations at homologous positions add accelerated protein degradation, explaining their more severe phenotype.\",\n      \"evidence\": \"CRE-luciferase and BRET dissociation assays with domain-specific cAMP analogs, protein-stability assays, and molecular modeling; phospho-CREB and reporter assays for the p.T239A acrodysostosis mutant\",\n      \"pmids\": [\"26405036\", \"22723333\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Why differential degradation occurs for homologous positions not explained\", \"Tissue determinants of acrodysostosis vs CNC phenotype unresolved\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Extended the tumor-suppressor role to additional epithelial tissues, demonstrating pancreatic carcinoma with full penetrance after RIα loss and an ERK–Snail–E-cadherin axis controlling proliferation and migration in lung adenocarcinoma.\",\n      \"evidence\": \"Pdx1-Cre Prkar1a KO with PKA assays and tumor characterization; shRNA knockdown/re-expression with E-cadherin rescue and xenograft assays in A549 cells\",\n      \"pmids\": [\"27803029\", \"27995993\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether sporadic human pancreatic/lung tumors carry PRKAR1A defects not established here\", \"Direct PKA targets in the Snail axis not identified\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How a single regulatory subunit loss produces such divergent tissue-specific effectors (Wnt, Rac1–Merlin, Runx2, mTOR, Bim) remains unresolved, as does the spatial logic that channels excess Cα activity to distinct compartments and substrates.\",\n      \"evidence\": null,\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unifying model linking compartmentalized PKA activity to tissue-specific effector selection\", \"Direct PKA substrates for most downstream pathways unmapped\", \"E3 ligases mediating vimentin and mutant-RIα degradation unidentified\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [16, 28, 15]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [16, 25, 4]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 1, 30]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [28, 15]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [28]},\n      {\"term_id\": \"GO:0005768\", \"supporting_discovery_ids\": [10]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [3, 15]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [4, 28, 21]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [2, 11, 20]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [21, 34, 38]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [33, 34]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 1, 30]}\n    ],\n    \"complexes\": [\"PKA holoenzyme\"],\n    \"partners\": [\"PRKACA\", \"PRKACB\", \"MTOR\", \"RXRA\"],\n    \"other_free_text\": []\n  }\n}\n```","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":8,"faith_total":8,"faith_pct":100.0}}