{"gene":"RITA1","run_date":"2026-04-28T19:45:45","timeline":{"discoveries":[{"year":2010,"finding":"RITA (C12ORF52/RBP-J interacting and tubulin-associated protein) was identified as a novel RBP-J/CBF-1-interacting protein that binds tubulin in the cytoplasm and shuttles rapidly between cytoplasm and nucleus, functioning to export RBP-J/CBF-1 from the nucleus, thereby acting as a negative modulator of the Notch signalling pathway and reversing Notch-induced loss of primary neurogenesis in Xenopus laevis.","method":"Co-immunoprecipitation, live-cell imaging (FRAP), overexpression/knockdown with reporter assays, Xenopus laevis functional rescue experiments","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 2 — reciprocal Co-IP, direct localization with functional consequence, in vivo phenotypic rescue, replicated across multiple systems","pmids":["21102556"],"is_preprint":false},{"year":2017,"finding":"The X-ray crystal structure of the RBP-J·RITA complex bound to DNA was determined, revealing that RITA binds RBP-J similarly to the RAM domain of Notch receptors. Structure-based mutagenesis and isothermal titration calorimetry demonstrated that RITA interacts with additional regions in RBP-J beyond the RAM-like binding site, and the complex formation is required for RITA-mediated repression of Notch target genes.","method":"X-ray crystallography, isothermal titration calorimetry, site-directed mutagenesis, co-immunoprecipitation, luciferase reporter assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 — crystal structure with functional validation by mutagenesis and biophysical methods in a single study","pmids":["28487372"],"is_preprint":false},{"year":2016,"finding":"RITA binds to tubulin and localizes to various mitotic microtubule structures, coating microtubules and affecting their structure in vitro and in vivo. Loss of RITA increases acetylated α-tubulin, enhances microtubule stability, reduces microtubule dynamics, and causes multiple mitotic defects including chromosome misalignment and segregation errors. Mechanistically, RITA interacts with tubulin/HDAC6 and its suppression decreases HDAC6 binding to tubulin/microtubules. Re-expression of wild-type RITA but not a tubulin-binding-deficient mutant (RITA Δtub) restores the phenotypes.","method":"In vitro microtubule binding assay, co-immunoprecipitation, RITA knockout MEFs, siRNA knockdown, rescue with wild-type vs. mutant RITA, immunofluorescence, live-cell imaging","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 1-2 — in vitro reconstitution, mutant rescue, KO phenotype with multiple orthogonal methods, moderate evidence","pmids":["27721410"],"is_preprint":false},{"year":2019,"finding":"RITA depletion reduces cell migration and invasion by stabilizing focal adhesions (FAs) with elevated active integrin, phosphorylated FAK, and paxillin, and disturbed FA turnover. RITA co-precipitates with LPP (lipoma-preferred partner), and its suppression reduces LPP and α-actinin at FAs, compromising actin dynamics. This identifies RITA as a regulator of cell motility through its effects on actin filament and microtubule dynamics.","method":"siRNA knockdown in multiple cell lines, co-immunoprecipitation (RITA with LPP), live-cell FA turnover assays, immunofluorescence, migration/invasion assays (Boyden chamber, wound healing)","journal":"Molecular oncology","confidence":"High","confidence_rationale":"Tier 2 — reciprocal Co-IP, multiple cell lines and KO MEFs, defined molecular mechanism with multiple orthogonal readouts","pmids":["31353815"],"is_preprint":false},{"year":2019,"finding":"RITA colocalizes with Aurora A and its activator TPX2 at spindle poles during mitosis, and FLAG-RITA co-precipitates with the Aurora A/TPX2/tubulin complex. RITA depletion increases active Aurora A and TPX2 at spindle poles, and the mitotic failures caused by RITA loss are rescued by Aurora A inhibition. RITA affects the microtubule-binding of TPX2 rather than directly inhibiting Aurora A catalytic activity, and the effect requires RITA's tubulin-binding domain (Δtub mutant fails to rescue).","method":"Co-immunoprecipitation (FLAG-RITA with Aurora A/TPX2/tubulin), immunofluorescence, RITA KO MEFs, siRNA knockdown, Aurora A kinase activity assay, rescue with WT vs. Δtub RITA","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 — reciprocal Co-IP, KO/rescue with domain mutant, multiple cell lines, in vitro kinase assay, strong evidence from single lab with multiple orthogonal methods","pmids":["30705408"],"is_preprint":false},{"year":2022,"finding":"RITA1 recruits TRIM25 (an E3 ubiquitin ligase) to ubiquitinate RBPJ, accelerating its proteasomal degradation. This leads to transcriptional inhibition of Notch1 downstream targets and drives bladder cancer cell growth. The RITA1/TRIM25/RBPJ axis was established through tumor microarray, shRNA library screening, co-immunoprecipitation, and proteasome inhibitor experiments.","method":"Co-immunoprecipitation, shRNA knockdown, proteasome inhibitor treatment (MG132), ubiquitination assay, gene microarray, xenograft models","journal":"Cancer science","confidence":"High","confidence_rationale":"Tier 2 — reciprocal Co-IP, ubiquitination assay, rescue experiments, defined molecular axis with multiple methods","pmids":["35701858"],"is_preprint":false},{"year":2014,"finding":"Human RITA binds to Drosophila Su(H) (ortholog of RBP-J) and to tubulin in vivo in Drosophila tissues, as shown by co-immunoprecipitation, and RITA co-localizes with tubulin in fly tissues. However, overexpression of human RITA in Drosophila does not phenotypically affect Notch signaling, suggesting that a Su(H) nuclear export mechanism dependent on RITA may not exist in flies.","method":"Transgenic fly expression, co-immunoprecipitation, immunofluorescence co-localization, genetic epistasis","journal":"Hereditas","confidence":"Medium","confidence_rationale":"Tier 2 — Co-IP and genetic tests, single lab, provides functional boundary of RITA's nuclear export mechanism","pmids":["25588307"],"is_preprint":false},{"year":2019,"finding":"RITA is expressed in trophoblastic cells throughout placental gestation including proliferative villous cytotrophoblasts, syncytiotrophoblast, and extravillous trophoblasts. Depletion of RITA impairs motility and invasion of trophoblastic cell lines and compromises fusion ability of choriocarcinoma-derived trophoblasts, establishing a functional role for RITA in placental development.","method":"siRNA knockdown, migration/invasion assays, cell fusion assays, qRT-PCR, immunofluorescence in primary tissue and cell lines","journal":"Cells","confidence":"Medium","confidence_rationale":"Tier 2-3 — KD with defined cellular phenotypes in multiple trophoblastic cell lines, single lab","pmids":["31766533"],"is_preprint":false},{"year":2013,"finding":"RITA overexpression in hepatocellular carcinoma (HepG2) cells suppresses cell proliferation and promotes apoptosis, upregulates p53, and reduces cyclin E levels, while RITA knockdown promotes cell growth and has opposite effects on p53 and cyclin E expression. This establishes RITA protein as a functional regulator of cell proliferation in HCC via modulation of p53 and cyclin E.","method":"Plasmid overexpression, siRNA knockdown, MTT assay, flow cytometry, qRT-PCR, Western blotting","journal":"Oncology research","confidence":"Medium","confidence_rationale":"Tier 3 — gain- and loss-of-function in a single cell line, single lab, no direct mechanistic reconstitution","pmids":["24308154"],"is_preprint":false},{"year":2016,"finding":"saRNA-guided Ago2 facilitates assembly of an RNA-induced transcriptional activation (RITA) complex that includes Ago2, RHA, and CTR9 (a PAF1 complex component). The RITA complex interacts with RNA Polymerase II to stimulate transcription initiation and productive elongation, accompanied by monoubiquitination of histone H2B, establishing a cellular RNA-guided transcriptional activation mechanism.","method":"Mass spectrometry-based proteomics, co-immunoprecipitation, ChIP, RNA pulldown, reporter assays, siRNA knockdown","journal":"Cell research","confidence":"High","confidence_rationale":"Tier 2 — MS interactome, reciprocal Co-IP, ChIP, and functional reporter assays; multiple orthogonal methods, strong evidence for the complex","pmids":["26902284"],"is_preprint":false}],"current_model":"RITA1 (RBP-J interacting and tubulin-associated protein, C12ORF52) is a multifunctional 36 kDa protein that: (1) binds RBP-J/CBF-1 in a RAM domain-like manner (established by X-ray crystal structure) and exports it from the nucleus to negatively regulate Notch target gene transcription; (2) coats microtubules via a direct tubulin-binding domain, modulating microtubule dynamics, spindle assembly, and chromosome segregation in mitosis—partly by controlling HDAC6 association with tubulin and by limiting TPX2-dependent Aurora A activation at spindle poles; (3) regulates cell migration and invasion by controlling focal adhesion turnover through its interaction with LPP and effects on actin/microtubule dynamics; (4) recruits the E3 ubiquitin ligase TRIM25 to ubiquitinate and proteasomally degrade RBPJ, thereby suppressing Notch1 downstream targets; and (5) participates in a saRNA-guided transcriptional activation (RNAa) complex with Ago2, RHA, and CTR9 to stimulate RNA Pol II-dependent transcription initiation and elongation."},"narrative":{"teleology":[{"year":2010,"claim":"The central question of whether Notch signaling is modulated by nuclear export of its transcription factor RBP-J was answered by identifying RITA as a cytoplasmic shuttle that binds both RBP-J and tubulin, exports RBP-J from the nucleus, and reverses Notch-induced loss of primary neurogenesis in Xenopus.","evidence":"Reciprocal co-immunoprecipitation, FRAP live-cell imaging, reporter assays, and Xenopus laevis phenotypic rescue","pmids":["21102556"],"confidence":"High","gaps":["Structural basis of RITA–RBP-J interaction undefined","Whether RITA's tubulin-binding and RBP-J-binding functions are independent was unclear","Mechanism of nuclear export (carrier, NES) not identified"]},{"year":2014,"claim":"Testing evolutionary conservation, human RITA was shown to bind Drosophila Su(H) and tubulin in vivo, but failed to perturb Notch signaling in flies, defining a species-specific boundary for RITA's nuclear export mechanism.","evidence":"Transgenic fly expression, co-immunoprecipitation, and genetic epistasis in Drosophila","pmids":["25588307"],"confidence":"Medium","gaps":["Why fly Su(H) binding is insufficient for functional export was not resolved","Whether an endogenous Drosophila RITA ortholog exists was not addressed"]},{"year":2016,"claim":"RITA's role on microtubules was mechanistically defined: it coats microtubule structures, promotes HDAC6 association with tubulin to regulate acetylation and dynamics, and its loss causes mitotic chromosome misalignment and segregation errors—establishing RITA as a direct regulator of microtubule stability through its tubulin-binding domain.","evidence":"In vitro microtubule binding, RITA KO MEFs, siRNA knockdown, rescue with wild-type vs. Δtub mutant, live-cell imaging","pmids":["27721410"],"confidence":"High","gaps":["Whether RITA directly modulates HDAC6 enzymatic activity or only its recruitment was unclear","Structural basis of RITA–tubulin interaction unresolved"]},{"year":2016,"claim":"A saRNA-guided transcriptional activation complex (termed 'RITA complex') containing Ago2, RHA, and CTR9 was shown to interact with RNA Pol II to stimulate transcription initiation and elongation with accompanying H2B monoubiquitination, establishing a distinct RNA-guided gene activation mechanism.","evidence":"Mass spectrometry proteomics, reciprocal co-immunoprecipitation, ChIP, RNA pulldown, and reporter assays","pmids":["26902284"],"confidence":"High","gaps":["Relationship between this 'RITA complex' and the RITA1 protein product is nomenclatural—whether RITA1 protein itself is a subunit was not demonstrated","Genome-wide target gene repertoire unknown","Structural organization of the complex undefined"]},{"year":2017,"claim":"The atomic-resolution crystal structure of the RBP-J·RITA·DNA complex revealed that RITA engages RBP-J via a RAM domain-mimicking interface plus additional contact surfaces, and structure-guided mutagenesis confirmed these contacts are required for Notch target gene repression.","evidence":"X-ray crystallography, isothermal titration calorimetry, site-directed mutagenesis, luciferase reporter assays","pmids":["28487372"],"confidence":"High","gaps":["How RITA competes with endogenous Notch-RAM for RBP-J binding in a physiological context was not resolved kinetically","Whether RITA simultaneously binds RBP-J and tubulin or these are mutually exclusive was unclear"]},{"year":2019,"claim":"RITA was shown to limit TPX2-dependent Aurora A activation at spindle poles: RITA loss hyperactivates Aurora A/TPX2, and Aurora A inhibition rescues the mitotic defects, revealing that RITA fine-tunes spindle assembly by controlling TPX2–microtubule association through its tubulin-binding domain.","evidence":"Co-immunoprecipitation of FLAG-RITA with Aurora A/TPX2/tubulin, KO MEFs, Aurora A kinase assay, rescue with WT vs. Δtub RITA","pmids":["30705408"],"confidence":"High","gaps":["Whether RITA directly binds TPX2 or acts indirectly through tubulin was not fully resolved","In vivo consequence for aneuploidy and tumorigenesis not established"]},{"year":2019,"claim":"RITA's function was extended to cell migration: its depletion stabilized focal adhesions (elevated active integrin, pFAK, paxillin) and reduced LPP/α-actinin at FAs, impairing motility—establishing RITA as a regulator of focal adhesion turnover through its interaction with LPP.","evidence":"siRNA knockdown in multiple cell lines and KO MEFs, co-immunoprecipitation of RITA with LPP, live-cell FA turnover assays, Boyden chamber and wound healing migration assays","pmids":["31353815"],"confidence":"High","gaps":["Whether the LPP interaction is direct or bridged by another protein was not confirmed with purified components","How RITA's tubulin-binding versus RBP-J-binding domains contribute to migration was not dissected"]},{"year":2022,"claim":"A second mechanism of RBPJ silencing was uncovered: RITA1 recruits the E3 ligase TRIM25 to ubiquitinate RBPJ, targeting it for proteasomal degradation and suppressing Notch1 downstream targets, linking RITA1 to bladder cancer cell growth.","evidence":"Co-immunoprecipitation, ubiquitination assay, MG132 proteasome inhibitor treatment, shRNA knockdown, xenograft models","pmids":["35701858"],"confidence":"High","gaps":["Whether RITA1's nuclear export and TRIM25-mediated degradation of RBPJ are sequential or independent pathways is unknown","Ubiquitination site(s) on RBPJ not mapped","In vivo relevance beyond bladder cancer xenografts not tested"]},{"year":null,"claim":"Key unresolved questions include whether RITA1's RBP-J-binding and tubulin-binding functions are coordinately regulated, the structural basis of RITA1–tubulin interaction, and whether RITA1's contributions to mitotic fidelity and Notch repression converge in developmental or tumor-suppressive contexts.","evidence":"","pmids":[],"confidence":"Low","gaps":["No structural model of RITA1–tubulin complex exists","Coordination between nuclear (RBP-J/TRIM25) and cytoplasmic (tubulin/HDAC6/TPX2) functions is unexplored","No in vivo genetic models (conditional knockout) have assessed developmental or tumor phenotypes"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[0,1,2,4,5]},{"term_id":"GO:0008092","term_label":"cytoskeletal protein binding","supporting_discovery_ids":[2,4]}],"localization":[{"term_id":"GO:0005856","term_label":"cytoskeleton","supporting_discovery_ids":[2,4]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[0,2]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0,1]},{"term_id":"GO:0005815","term_label":"microtubule organizing center","supporting_discovery_ids":[4]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[0,1,5]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[2,4]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[5]}],"complexes":["RITA1–RBP-J","RITA1–TRIM25–RBPJ","Aurora A–TPX2–tubulin"],"partners":["RBPJ","TRIM25","HDAC6","TPX2","AURKA","LPP"],"other_free_text":[]},"mechanistic_narrative":"RITA1 is a multifunctional protein that negatively regulates Notch signaling and modulates microtubule dynamics during mitosis and cell migration. RITA1 binds RBP-J/CBF-1 through a RAM domain-like interface—confirmed by X-ray crystallography—and exports RBP-J from the nucleus to repress Notch target genes; it additionally recruits the E3 ubiquitin ligase TRIM25 to ubiquitinate RBPJ for proteasomal degradation [PMID:21102556, PMID:28487372, PMID:35701858]. Through a distinct tubulin-binding domain, RITA1 coats microtubules, promotes HDAC6 association with tubulin, and limits TPX2-dependent Aurora A activation at spindle poles, thereby ensuring proper chromosome alignment and segregation [PMID:27721410, PMID:30705408]. RITA1 also regulates focal adhesion turnover through interaction with LPP, controlling cell migration and invasion [PMID:31353815]."},"prefetch_data":{"uniprot":{"accession":"Q96K30","full_name":"RBPJ-interacting and tubulin-associated protein 1","aliases":["RBPJ-interacting and tubulin-associated protein"],"length_aa":269,"mass_kda":28.6,"function":"Tubulin-binding protein that acts as a negative regulator of Notch signaling pathway. Shuttles between the cytoplasm and the nucleus and mediates the nuclear export of RBPJ/RBPSUH, thereby preventing the interaction between RBPJ/RBPSUH and NICD product of Notch proteins (Notch intracellular domain), leading to down-regulate Notch-mediated transcription. May play a role in neurogenesis","subcellular_location":"Cytoplasm; Nucleus; Cytoplasm, cytoskeleton, microtubule organizing center, centrosome","url":"https://www.uniprot.org/uniprotkb/Q96K30/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/RITA1","classification":"Not Classified","n_dependent_lines":95,"n_total_lines":1208,"dependency_fraction":0.07864238410596026},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/RITA1","total_profiled":1310},"omim":[{"mim_id":"620696","title":"RBPJ-INTERACTING AND TUBULIN-ASSOCIATED PROTEIN 1; RITA1","url":"https://www.omim.org/entry/620696"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Nucleoplasm","reliability":"Supported"},{"location":"Golgi apparatus","reliability":"Additional"},{"location":"Primary cilium","reliability":"Additional"},{"location":"Primary cilium tip","reliability":"Additional"},{"location":"Cytosol","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/RITA1"},"hgnc":{"alias_symbol":["FLJ14827","RITA"],"prev_symbol":["C12orf52"]},"alphafold":{"accession":"Q96K30","domains":[],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q96K30","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q96K30-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q96K30-F1-predicted_aligned_error_v6.png","plddt_mean":59.34},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=RITA1","jax_strain_url":"https://www.jax.org/strain/search?query=RITA1"},"sequence":{"accession":"Q96K30","fasta_url":"https://rest.uniprot.org/uniprotkb/Q96K30.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q96K30/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q96K30"}},"corpus_meta":[{"pmid":"15558054","id":"PMC_15558054","title":"Small molecule RITA binds to p53, blocks p53-HDM-2 interaction and activates p53 function in tumors.","date":"2004","source":"Nature medicine","url":"https://pubmed.ncbi.nlm.nih.gov/15558054","citation_count":640,"is_preprint":false},{"pmid":"26902284","id":"PMC_26902284","title":"saRNA-guided Ago2 targets the RITA complex to promoters to stimulate transcription.","date":"2016","source":"Cell research","url":"https://pubmed.ncbi.nlm.nih.gov/26902284","citation_count":111,"is_preprint":false},{"pmid":"19411072","id":"PMC_19411072","title":"Ablation of key oncogenic pathways by RITA-reactivated p53 is required for efficient apoptosis.","date":"2009","source":"Cancer cell","url":"https://pubmed.ncbi.nlm.nih.gov/19411072","citation_count":96,"is_preprint":false},{"pmid":"7919992","id":"PMC_7919992","title":"The rice bZIP transcriptional activator RITA-1 is highly expressed during seed development.","date":"1994","source":"The Plant cell","url":"https://pubmed.ncbi.nlm.nih.gov/7919992","citation_count":94,"is_preprint":false},{"pmid":"15246433","id":"PMC_15246433","title":"Rita Levi-Montalcini: the discovery of nerve growth factor and modern neurobiology.","date":"2004","source":"Trends in cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/15246433","citation_count":76,"is_preprint":false},{"pmid":"20395210","id":"PMC_20395210","title":"Rescue of p53 function by small-molecule RITA in cervical carcinoma by blocking E6-mediated degradation.","date":"2010","source":"Cancer research","url":"https://pubmed.ncbi.nlm.nih.gov/20395210","citation_count":74,"is_preprint":false},{"pmid":"20436301","id":"PMC_20436301","title":"Rescue of the apoptotic-inducing function of mutant p53 by small molecule RITA.","date":"2010","source":"Cell cycle (Georgetown, Tex.)","url":"https://pubmed.ncbi.nlm.nih.gov/20436301","citation_count":69,"is_preprint":false},{"pmid":"22276160","id":"PMC_22276160","title":"Targeting p53 via JNK pathway: a novel role of RITA for apoptotic signaling in multiple myeloma.","date":"2012","source":"PloS 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journal","url":"https://pubmed.ncbi.nlm.nih.gov/21102556","citation_count":57,"is_preprint":false},{"pmid":"23864164","id":"PMC_23864164","title":"Dual targeting of wild-type and mutant p53 by small molecule RITA results in the inhibition of N-Myc and key survival oncogenes and kills neuroblastoma cells in vivo and in vitro.","date":"2013","source":"Clinical cancer research : an official journal of the American Association for Cancer Research","url":"https://pubmed.ncbi.nlm.nih.gov/23864164","citation_count":54,"is_preprint":false},{"pmid":"25010984","id":"PMC_25010984","title":"RITA can induce cell death in p53-defective cells independently of p53 function via activation of JNK/SAPK and p38.","date":"2014","source":"Cell death & disease","url":"https://pubmed.ncbi.nlm.nih.gov/25010984","citation_count":52,"is_preprint":false},{"pmid":"22933706","id":"PMC_22933706","title":"Drug resistance to inhibitors of the human double minute-2 E3 ligase is mediated by point mutations of p53, but can be overcome with the p53 targeting agent RITA.","date":"2012","source":"Molecular cancer therapeutics","url":"https://pubmed.ncbi.nlm.nih.gov/22933706","citation_count":49,"is_preprint":false},{"pmid":"28582730","id":"PMC_28582730","title":"RITA plus 3-MA overcomes chemoresistance of head and neck cancer cells via dual inhibition of autophagy and antioxidant systems.","date":"2017","source":"Redox biology","url":"https://pubmed.ncbi.nlm.nih.gov/28582730","citation_count":48,"is_preprint":false},{"pmid":"19638586","id":"PMC_19638586","title":"HIPK2 regulation by MDM2 determines tumor cell response to the p53-reactivating drugs nutlin-3 and RITA.","date":"2009","source":"Cancer research","url":"https://pubmed.ncbi.nlm.nih.gov/19638586","citation_count":45,"is_preprint":false},{"pmid":"28284059","id":"PMC_28284059","title":"Reactivating p53 and Inducing Tumor Apoptosis (RITA) Enhances the Response of RITA-Sensitive Colorectal Cancer Cells to Chemotherapeutic Agents 5-Fluorouracil and Oxaliplatin.","date":"2017","source":"Neoplasia (New York, N.Y.)","url":"https://pubmed.ncbi.nlm.nih.gov/28284059","citation_count":44,"is_preprint":false},{"pmid":"21062913","id":"PMC_21062913","title":"RITA inhibits multiple myeloma cell growth through induction of p53-mediated caspase-dependent apoptosis and synergistically enhances nutlin-induced cytotoxic responses.","date":"2010","source":"Molecular cancer therapeutics","url":"https://pubmed.ncbi.nlm.nih.gov/21062913","citation_count":38,"is_preprint":false},{"pmid":"24345738","id":"PMC_24345738","title":"Pharmacological targeting of p53 through RITA is an effective antitumoral strategy for malignant pleural mesothelioma.","date":"2013","source":"Cell cycle (Georgetown, Tex.)","url":"https://pubmed.ncbi.nlm.nih.gov/24345738","citation_count":37,"is_preprint":false},{"pmid":"21546907","id":"PMC_21546907","title":"Abrogation of Wip1 expression by RITA-activated p53 potentiates apoptosis induction via activation of ATM and inhibition of HdmX.","date":"2011","source":"Cell death and differentiation","url":"https://pubmed.ncbi.nlm.nih.gov/21546907","citation_count":33,"is_preprint":false},{"pmid":"19174873","id":"PMC_19174873","title":"Changes in microbial community structure in the wake of Hurricanes Katrina and Rita.","date":"2008","source":"Environmental science & technology","url":"https://pubmed.ncbi.nlm.nih.gov/19174873","citation_count":32,"is_preprint":false},{"pmid":"21642406","id":"PMC_21642406","title":"Temporal and spatial variability in culturable pathogenic Vibrio spp. in Lake Pontchartrain, Louisiana, following hurricanes Katrina and Rita.","date":"2011","source":"Applied and environmental microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/21642406","citation_count":31,"is_preprint":false},{"pmid":"21701989","id":"PMC_21701989","title":"Rita Levi-Montalcini and the discovery of NGF, the first nerve cell growth factor.","date":"2011","source":"Archives italiennes de 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Opercular epidermis.","date":"1989","source":"Ecotoxicology and environmental safety","url":"https://pubmed.ncbi.nlm.nih.gov/2714220","citation_count":2,"is_preprint":false},{"pmid":"24409859","id":"PMC_24409859","title":"Complete mitochondrial genome of the Freshwater Catfish Rita rita (Siluriformes, Bagridae).","date":"2015","source":"Mitochondrial DNA","url":"https://pubmed.ncbi.nlm.nih.gov/24409859","citation_count":2,"is_preprint":false},{"pmid":"34453296","id":"PMC_34453296","title":"Rita Levi-Montalcini, NGF Metabolism in Health and in the Alzheimer's Pathology.","date":"2021","source":"Advances in experimental medicine and biology","url":"https://pubmed.ncbi.nlm.nih.gov/34453296","citation_count":1,"is_preprint":false},{"pmid":"40714031","id":"PMC_40714031","title":"Ovarian stimulation with follitropin delta is safe and effective: results from the RITA randomized, double-blind, placebo-controlled trials.","date":"2025","source":"Fertility and sterility","url":"https://pubmed.ncbi.nlm.nih.gov/40714031","citation_count":1,"is_preprint":false},{"pmid":"2714221","id":"PMC_2714221","title":"Detergent-induced changes in the mapping of certain enzymes in various cell types of Rita rita. 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Gill epithelium.","date":"1989","source":"Ecotoxicology and environmental safety","url":"https://pubmed.ncbi.nlm.nih.gov/2714221","citation_count":1,"is_preprint":false},{"pmid":"27777210","id":"PMC_27777210","title":"[RITA combined with temozolomide inhibits the proliferation of human glioblastoma U87 cells].","date":"2016","source":"Nan fang yi ke da xue xue bao = Journal of Southern Medical University","url":"https://pubmed.ncbi.nlm.nih.gov/27777210","citation_count":1,"is_preprint":false},{"pmid":"2252548","id":"PMC_2252548","title":"Detergent-induced changes in the protein constituents of various cell types of opercular epidermis of Rita rita.","date":"1990","source":"Biomedical and environmental sciences : BES","url":"https://pubmed.ncbi.nlm.nih.gov/2252548","citation_count":1,"is_preprint":false},{"pmid":"39429264","id":"PMC_39429264","title":"Rita Levi-Montalcini: From Persecution to the Nobel Prize and an Honorary Degree From a Canadian University.","date":"2024","source":"Cureus","url":"https://pubmed.ncbi.nlm.nih.gov/39429264","citation_count":0,"is_preprint":false},{"pmid":"27247549","id":"PMC_27247549","title":"Identification of differentially expressed genes associated with the enhancement of X-ray susceptibility by RITA in a hypopharyngeal squamous cell carcinoma cell line (FaDu).","date":"2016","source":"Radiology and oncology","url":"https://pubmed.ncbi.nlm.nih.gov/27247549","citation_count":0,"is_preprint":false},{"pmid":"2604897","id":"PMC_2604897","title":"Toxic effects of an anionic detergent on the lipid constituents of various cell types of the gill epithelium of Rita rita: a histochemical investigation.","date":"1989","source":"Biomedical and environmental sciences : BES","url":"https://pubmed.ncbi.nlm.nih.gov/2604897","citation_count":0,"is_preprint":false},{"pmid":"37313811","id":"PMC_37313811","title":"[RITA selectively inhibits proliferation of BAP1-deficient cutaneous melanoma cells in vitro].","date":"2023","source":"Nan fang yi ke da xue xue bao = Journal of Southern Medical University","url":"https://pubmed.ncbi.nlm.nih.gov/37313811","citation_count":0,"is_preprint":false},{"pmid":"41599005","id":"PMC_41599005","title":"Evaluation of the Novel RITA MTBC Assay for Tuberculosis Detection: A Pilot Comparison with GeneXpert and BD MAX™.","date":"2025","source":"Pathogens (Basel, Switzerland)","url":"https://pubmed.ncbi.nlm.nih.gov/41599005","citation_count":0,"is_preprint":false},{"pmid":"34893110","id":"PMC_34893110","title":"[Effect of RITA on TP53 Mutant Human Mantle Cell Lymphoma Cell Line and Its Mechanism].","date":"2021","source":"Zhongguo shi yan xue ye xue za zhi","url":"https://pubmed.ncbi.nlm.nih.gov/34893110","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":43234,"output_tokens":2961,"usd":0.087058},"stage2":{"model":"claude-opus-4-6","input_tokens":6288,"output_tokens":2667,"usd":0.147173},"total_usd":0.234231,"stage1_batch_id":"msgbatch_01SUR8NDzVrNmyszWyJeCct7","stage2_batch_id":"msgbatch_01G7Yfutko3cDWzejrwH5AMx","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2010,\n      \"finding\": \"RITA (C12ORF52/RBP-J interacting and tubulin-associated protein) was identified as a novel RBP-J/CBF-1-interacting protein that binds tubulin in the cytoplasm and shuttles rapidly between cytoplasm and nucleus, functioning to export RBP-J/CBF-1 from the nucleus, thereby acting as a negative modulator of the Notch signalling pathway and reversing Notch-induced loss of primary neurogenesis in Xenopus laevis.\",\n      \"method\": \"Co-immunoprecipitation, live-cell imaging (FRAP), overexpression/knockdown with reporter assays, Xenopus laevis functional rescue experiments\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal Co-IP, direct localization with functional consequence, in vivo phenotypic rescue, replicated across multiple systems\",\n      \"pmids\": [\"21102556\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"The X-ray crystal structure of the RBP-J·RITA complex bound to DNA was determined, revealing that RITA binds RBP-J similarly to the RAM domain of Notch receptors. Structure-based mutagenesis and isothermal titration calorimetry demonstrated that RITA interacts with additional regions in RBP-J beyond the RAM-like binding site, and the complex formation is required for RITA-mediated repression of Notch target genes.\",\n      \"method\": \"X-ray crystallography, isothermal titration calorimetry, site-directed mutagenesis, co-immunoprecipitation, luciferase reporter assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — crystal structure with functional validation by mutagenesis and biophysical methods in a single study\",\n      \"pmids\": [\"28487372\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"RITA binds to tubulin and localizes to various mitotic microtubule structures, coating microtubules and affecting their structure in vitro and in vivo. Loss of RITA increases acetylated α-tubulin, enhances microtubule stability, reduces microtubule dynamics, and causes multiple mitotic defects including chromosome misalignment and segregation errors. Mechanistically, RITA interacts with tubulin/HDAC6 and its suppression decreases HDAC6 binding to tubulin/microtubules. Re-expression of wild-type RITA but not a tubulin-binding-deficient mutant (RITA Δtub) restores the phenotypes.\",\n      \"method\": \"In vitro microtubule binding assay, co-immunoprecipitation, RITA knockout MEFs, siRNA knockdown, rescue with wild-type vs. mutant RITA, immunofluorescence, live-cell imaging\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — in vitro reconstitution, mutant rescue, KO phenotype with multiple orthogonal methods, moderate evidence\",\n      \"pmids\": [\"27721410\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RITA depletion reduces cell migration and invasion by stabilizing focal adhesions (FAs) with elevated active integrin, phosphorylated FAK, and paxillin, and disturbed FA turnover. RITA co-precipitates with LPP (lipoma-preferred partner), and its suppression reduces LPP and α-actinin at FAs, compromising actin dynamics. This identifies RITA as a regulator of cell motility through its effects on actin filament and microtubule dynamics.\",\n      \"method\": \"siRNA knockdown in multiple cell lines, co-immunoprecipitation (RITA with LPP), live-cell FA turnover assays, immunofluorescence, migration/invasion assays (Boyden chamber, wound healing)\",\n      \"journal\": \"Molecular oncology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal Co-IP, multiple cell lines and KO MEFs, defined molecular mechanism with multiple orthogonal readouts\",\n      \"pmids\": [\"31353815\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RITA colocalizes with Aurora A and its activator TPX2 at spindle poles during mitosis, and FLAG-RITA co-precipitates with the Aurora A/TPX2/tubulin complex. RITA depletion increases active Aurora A and TPX2 at spindle poles, and the mitotic failures caused by RITA loss are rescued by Aurora A inhibition. RITA affects the microtubule-binding of TPX2 rather than directly inhibiting Aurora A catalytic activity, and the effect requires RITA's tubulin-binding domain (Δtub mutant fails to rescue).\",\n      \"method\": \"Co-immunoprecipitation (FLAG-RITA with Aurora A/TPX2/tubulin), immunofluorescence, RITA KO MEFs, siRNA knockdown, Aurora A kinase activity assay, rescue with WT vs. Δtub RITA\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal Co-IP, KO/rescue with domain mutant, multiple cell lines, in vitro kinase assay, strong evidence from single lab with multiple orthogonal methods\",\n      \"pmids\": [\"30705408\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"RITA1 recruits TRIM25 (an E3 ubiquitin ligase) to ubiquitinate RBPJ, accelerating its proteasomal degradation. This leads to transcriptional inhibition of Notch1 downstream targets and drives bladder cancer cell growth. The RITA1/TRIM25/RBPJ axis was established through tumor microarray, shRNA library screening, co-immunoprecipitation, and proteasome inhibitor experiments.\",\n      \"method\": \"Co-immunoprecipitation, shRNA knockdown, proteasome inhibitor treatment (MG132), ubiquitination assay, gene microarray, xenograft models\",\n      \"journal\": \"Cancer science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal Co-IP, ubiquitination assay, rescue experiments, defined molecular axis with multiple methods\",\n      \"pmids\": [\"35701858\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Human RITA binds to Drosophila Su(H) (ortholog of RBP-J) and to tubulin in vivo in Drosophila tissues, as shown by co-immunoprecipitation, and RITA co-localizes with tubulin in fly tissues. However, overexpression of human RITA in Drosophila does not phenotypically affect Notch signaling, suggesting that a Su(H) nuclear export mechanism dependent on RITA may not exist in flies.\",\n      \"method\": \"Transgenic fly expression, co-immunoprecipitation, immunofluorescence co-localization, genetic epistasis\",\n      \"journal\": \"Hereditas\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — Co-IP and genetic tests, single lab, provides functional boundary of RITA's nuclear export mechanism\",\n      \"pmids\": [\"25588307\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RITA is expressed in trophoblastic cells throughout placental gestation including proliferative villous cytotrophoblasts, syncytiotrophoblast, and extravillous trophoblasts. Depletion of RITA impairs motility and invasion of trophoblastic cell lines and compromises fusion ability of choriocarcinoma-derived trophoblasts, establishing a functional role for RITA in placental development.\",\n      \"method\": \"siRNA knockdown, migration/invasion assays, cell fusion assays, qRT-PCR, immunofluorescence in primary tissue and cell lines\",\n      \"journal\": \"Cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — KD with defined cellular phenotypes in multiple trophoblastic cell lines, single lab\",\n      \"pmids\": [\"31766533\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"RITA overexpression in hepatocellular carcinoma (HepG2) cells suppresses cell proliferation and promotes apoptosis, upregulates p53, and reduces cyclin E levels, while RITA knockdown promotes cell growth and has opposite effects on p53 and cyclin E expression. This establishes RITA protein as a functional regulator of cell proliferation in HCC via modulation of p53 and cyclin E.\",\n      \"method\": \"Plasmid overexpression, siRNA knockdown, MTT assay, flow cytometry, qRT-PCR, Western blotting\",\n      \"journal\": \"Oncology research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — gain- and loss-of-function in a single cell line, single lab, no direct mechanistic reconstitution\",\n      \"pmids\": [\"24308154\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"saRNA-guided Ago2 facilitates assembly of an RNA-induced transcriptional activation (RITA) complex that includes Ago2, RHA, and CTR9 (a PAF1 complex component). The RITA complex interacts with RNA Polymerase II to stimulate transcription initiation and productive elongation, accompanied by monoubiquitination of histone H2B, establishing a cellular RNA-guided transcriptional activation mechanism.\",\n      \"method\": \"Mass spectrometry-based proteomics, co-immunoprecipitation, ChIP, RNA pulldown, reporter assays, siRNA knockdown\",\n      \"journal\": \"Cell research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — MS interactome, reciprocal Co-IP, ChIP, and functional reporter assays; multiple orthogonal methods, strong evidence for the complex\",\n      \"pmids\": [\"26902284\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"RITA1 (RBP-J interacting and tubulin-associated protein, C12ORF52) is a multifunctional 36 kDa protein that: (1) binds RBP-J/CBF-1 in a RAM domain-like manner (established by X-ray crystal structure) and exports it from the nucleus to negatively regulate Notch target gene transcription; (2) coats microtubules via a direct tubulin-binding domain, modulating microtubule dynamics, spindle assembly, and chromosome segregation in mitosis—partly by controlling HDAC6 association with tubulin and by limiting TPX2-dependent Aurora A activation at spindle poles; (3) regulates cell migration and invasion by controlling focal adhesion turnover through its interaction with LPP and effects on actin/microtubule dynamics; (4) recruits the E3 ubiquitin ligase TRIM25 to ubiquitinate and proteasomally degrade RBPJ, thereby suppressing Notch1 downstream targets; and (5) participates in a saRNA-guided transcriptional activation (RNAa) complex with Ago2, RHA, and CTR9 to stimulate RNA Pol II-dependent transcription initiation and elongation.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"RITA1 is a multifunctional protein that negatively regulates Notch signaling and modulates microtubule dynamics during mitosis and cell migration. RITA1 binds RBP-J/CBF-1 through a RAM domain-like interface—confirmed by X-ray crystallography—and exports RBP-J from the nucleus to repress Notch target genes; it additionally recruits the E3 ubiquitin ligase TRIM25 to ubiquitinate RBPJ for proteasomal degradation [PMID:21102556, PMID:28487372, PMID:35701858]. Through a distinct tubulin-binding domain, RITA1 coats microtubules, promotes HDAC6 association with tubulin, and limits TPX2-dependent Aurora A activation at spindle poles, thereby ensuring proper chromosome alignment and segregation [PMID:27721410, PMID:30705408]. RITA1 also regulates focal adhesion turnover through interaction with LPP, controlling cell migration and invasion [PMID:31353815].\",\n  \"teleology\": [\n    {\n      \"year\": 2010,\n      \"claim\": \"The central question of whether Notch signaling is modulated by nuclear export of its transcription factor RBP-J was answered by identifying RITA as a cytoplasmic shuttle that binds both RBP-J and tubulin, exports RBP-J from the nucleus, and reverses Notch-induced loss of primary neurogenesis in Xenopus.\",\n      \"evidence\": \"Reciprocal co-immunoprecipitation, FRAP live-cell imaging, reporter assays, and Xenopus laevis phenotypic rescue\",\n      \"pmids\": [\"21102556\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Structural basis of RITA–RBP-J interaction undefined\",\n        \"Whether RITA's tubulin-binding and RBP-J-binding functions are independent was unclear\",\n        \"Mechanism of nuclear export (carrier, NES) not identified\"\n      ]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Testing evolutionary conservation, human RITA was shown to bind Drosophila Su(H) and tubulin in vivo, but failed to perturb Notch signaling in flies, defining a species-specific boundary for RITA's nuclear export mechanism.\",\n      \"evidence\": \"Transgenic fly expression, co-immunoprecipitation, and genetic epistasis in Drosophila\",\n      \"pmids\": [\"25588307\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Why fly Su(H) binding is insufficient for functional export was not resolved\",\n        \"Whether an endogenous Drosophila RITA ortholog exists was not addressed\"\n      ]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"RITA's role on microtubules was mechanistically defined: it coats microtubule structures, promotes HDAC6 association with tubulin to regulate acetylation and dynamics, and its loss causes mitotic chromosome misalignment and segregation errors—establishing RITA as a direct regulator of microtubule stability through its tubulin-binding domain.\",\n      \"evidence\": \"In vitro microtubule binding, RITA KO MEFs, siRNA knockdown, rescue with wild-type vs. Δtub mutant, live-cell imaging\",\n      \"pmids\": [\"27721410\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether RITA directly modulates HDAC6 enzymatic activity or only its recruitment was unclear\",\n        \"Structural basis of RITA–tubulin interaction unresolved\"\n      ]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"A saRNA-guided transcriptional activation complex (termed 'RITA complex') containing Ago2, RHA, and CTR9 was shown to interact with RNA Pol II to stimulate transcription initiation and elongation with accompanying H2B monoubiquitination, establishing a distinct RNA-guided gene activation mechanism.\",\n      \"evidence\": \"Mass spectrometry proteomics, reciprocal co-immunoprecipitation, ChIP, RNA pulldown, and reporter assays\",\n      \"pmids\": [\"26902284\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Relationship between this 'RITA complex' and the RITA1 protein product is nomenclatural—whether RITA1 protein itself is a subunit was not demonstrated\",\n        \"Genome-wide target gene repertoire unknown\",\n        \"Structural organization of the complex undefined\"\n      ]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"The atomic-resolution crystal structure of the RBP-J·RITA·DNA complex revealed that RITA engages RBP-J via a RAM domain-mimicking interface plus additional contact surfaces, and structure-guided mutagenesis confirmed these contacts are required for Notch target gene repression.\",\n      \"evidence\": \"X-ray crystallography, isothermal titration calorimetry, site-directed mutagenesis, luciferase reporter assays\",\n      \"pmids\": [\"28487372\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"How RITA competes with endogenous Notch-RAM for RBP-J binding in a physiological context was not resolved kinetically\",\n        \"Whether RITA simultaneously binds RBP-J and tubulin or these are mutually exclusive was unclear\"\n      ]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"RITA was shown to limit TPX2-dependent Aurora A activation at spindle poles: RITA loss hyperactivates Aurora A/TPX2, and Aurora A inhibition rescues the mitotic defects, revealing that RITA fine-tunes spindle assembly by controlling TPX2–microtubule association through its tubulin-binding domain.\",\n      \"evidence\": \"Co-immunoprecipitation of FLAG-RITA with Aurora A/TPX2/tubulin, KO MEFs, Aurora A kinase assay, rescue with WT vs. Δtub RITA\",\n      \"pmids\": [\"30705408\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether RITA directly binds TPX2 or acts indirectly through tubulin was not fully resolved\",\n        \"In vivo consequence for aneuploidy and tumorigenesis not established\"\n      ]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"RITA's function was extended to cell migration: its depletion stabilized focal adhesions (elevated active integrin, pFAK, paxillin) and reduced LPP/α-actinin at FAs, impairing motility—establishing RITA as a regulator of focal adhesion turnover through its interaction with LPP.\",\n      \"evidence\": \"siRNA knockdown in multiple cell lines and KO MEFs, co-immunoprecipitation of RITA with LPP, live-cell FA turnover assays, Boyden chamber and wound healing migration assays\",\n      \"pmids\": [\"31353815\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether the LPP interaction is direct or bridged by another protein was not confirmed with purified components\",\n        \"How RITA's tubulin-binding versus RBP-J-binding domains contribute to migration was not dissected\"\n      ]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"A second mechanism of RBPJ silencing was uncovered: RITA1 recruits the E3 ligase TRIM25 to ubiquitinate RBPJ, targeting it for proteasomal degradation and suppressing Notch1 downstream targets, linking RITA1 to bladder cancer cell growth.\",\n      \"evidence\": \"Co-immunoprecipitation, ubiquitination assay, MG132 proteasome inhibitor treatment, shRNA knockdown, xenograft models\",\n      \"pmids\": [\"35701858\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether RITA1's nuclear export and TRIM25-mediated degradation of RBPJ are sequential or independent pathways is unknown\",\n        \"Ubiquitination site(s) on RBPJ not mapped\",\n        \"In vivo relevance beyond bladder cancer xenografts not tested\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Key unresolved questions include whether RITA1's RBP-J-binding and tubulin-binding functions are coordinately regulated, the structural basis of RITA1–tubulin interaction, and whether RITA1's contributions to mitotic fidelity and Notch repression converge in developmental or tumor-suppressive contexts.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\n        \"No structural model of RITA1–tubulin complex exists\",\n        \"Coordination between nuclear (RBP-J/TRIM25) and cytoplasmic (tubulin/HDAC6/TPX2) functions is unexplored\",\n        \"No in vivo genetic models (conditional knockout) have assessed developmental or tumor phenotypes\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [0, 1, 2, 4, 5]},\n      {\"term_id\": \"GO:0008092\", \"supporting_discovery_ids\": [2, 4]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005856\", \"supporting_discovery_ids\": [2, 4]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [0, 2]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 1]},\n      {\"term_id\": \"GO:0005815\", \"supporting_discovery_ids\": [4]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [0, 1, 5]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [2, 4]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [5]}\n    ],\n    \"complexes\": [\n      \"RITA1–RBP-J\",\n      \"RITA1–TRIM25–RBPJ\",\n      \"Aurora A–TPX2–tubulin\"\n    ],\n    \"partners\": [\n      \"RBPJ\",\n      \"TRIM25\",\n      \"HDAC6\",\n      \"TPX2\",\n      \"AURKA\",\n      \"LPP\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}