{"gene":"RELL2","run_date":"2026-06-10T06:43:36","timeline":{"discoveries":[{"year":2005,"finding":"RELL2 physically interacts with RELT and RELL1, as demonstrated by in vitro co-immunoprecipitation experiments, and co-localizes with them at the plasma membrane.","method":"In vitro co-immunoprecipitation, fluorescence co-localization","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal Co-IP with co-localization, single lab, two orthogonal methods","pmids":["16389068"],"is_preprint":false},{"year":2005,"finding":"RELL2 is phosphorylated by the OSR1 (OXSR1) kinase, as shown by an in vitro kinase assay; OSR1 was identified as an interactor via yeast two-hybrid screen and confirmed by co-immunoprecipitation.","method":"Yeast two-hybrid screen, in vitro co-immunoprecipitation, in vitro kinase assay","journal":"Biochemical and biophysical research communications","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro kinase assay combined with yeast two-hybrid and Co-IP in single study, single lab","pmids":["16389068"],"is_preprint":false},{"year":2009,"finding":"Overexpression of RELL2 in HEK 293 epithelial cells induces cell death with morphological characteristics consistent with apoptosis (cell rounding, lifting, and DNA fragmentation).","method":"Transient transfection, DNA fragmentation assay, morphological analysis","journal":"Cellular immunology","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — overexpression phenotype with DNA fragmentation readout, single lab, replicated across RELT family members","pmids":["19969290"],"is_preprint":false},{"year":2017,"finding":"RELL2 overexpression activates the p38 MAPK pathway in HEK-293 cells more substantially than RELT, and this activation is blocked by dominant-negative forms of OSR1 or TRAF2, implicating these molecules in RELL2 signaling.","method":"Transient transfection, dominant-negative mutant constructs, western blotting for p38 activation","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — epistasis via dominant-negative mutants with defined pathway placement, single lab, two inhibitory constructs tested","pmids":["28688764"],"is_preprint":false},{"year":2020,"finding":"RELL2 physically interacts with the transcription factor MDFIC, as demonstrated by in vitro co-immunoprecipitation; MDFIC co-localizes with RELL2 most prominently at the plasma membrane.","method":"Yeast two-hybrid (RELL1 bait identifying MDFIC), in vitro co-immunoprecipitation, fluorescence co-localization","journal":"Biochemistry and biophysics reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with co-localization and deletion-mutant mapping, single lab, two orthogonal methods","pmids":["33367115"],"is_preprint":false},{"year":2019,"finding":"RELL2 is a direct target of miR-18a; miR-18a suppresses RELL2 expression and promotes breast cancer cell migration, while RELL2 itself has anti-metastatic functions in 4T1 and MDA-MB-231 cells.","method":"Luciferase reporter assay (target validation), real-time PCR, western blotting, siRNA knockdown, migration/invasion assays","journal":"European journal of pharmacology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — luciferase reporter + siRNA knockdown with functional phenotype, single lab, multiple orthogonal methods","pmids":["30817902"],"is_preprint":false},{"year":2023,"finding":"DHX38 directly interacts with RELL2 pre-mRNA and regulates alternative splicing (intron 4 retention) of RELL2; altered DHX38 expression causes corresponding changes in RELL2 intron 4 retention, and RELL2 plays an anti-oncogenic role in pancreatic ductal adenocarcinoma as shown by cell proliferation, gemcitabine cytotoxicity, and apoptosis assays.","method":"RIP-qPCR, overexpression/knockdown functional assays (proliferation, cytotoxicity, apoptosis), intron retention analysis","journal":"PLoS genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — RIP-qPCR demonstrating direct DHX38–RELL2 RNA interaction plus functional assays, single lab, multiple orthogonal methods","pmids":["37506056"],"is_preprint":false}],"current_model":"RELL2 is a TNF receptor family member that localizes to the plasma membrane, physically associates with RELT, RELL1, MDFIC, and the OSR1/OXSR1 kinase (which phosphorylates it), activates the p38 MAPK pathway via OSR1 and TRAF2, and induces apoptosis when overexpressed; its expression is post-transcriptionally regulated by miR-18a and at the splicing level by the RNA helicase DHX38, with loss of RELL2 promoting cancer cell migration and chemoresistance."},"narrative":{"mechanistic_narrative":"RELL2 is a TNF receptor-family-associated protein that functions in plasma-membrane-anchored signaling controlling apoptosis, stress-kinase activation, and tumor cell behavior [PMID:16389068, PMID:28688764]. It physically associates with the related receptors RELT and RELL1 and co-localizes with them at the plasma membrane [PMID:16389068], and engages the transcription factor MDFIC, which is recruited to the same membrane compartment [PMID:33367115]. RELL2 is a substrate of the OSR1/OXSR1 kinase, which binds and phosphorylates it [PMID:16389068], and its overexpression drives activation of the p38 MAPK pathway in a manner dependent on OSR1 and TRAF2 [PMID:28688764] and induces apoptotic cell death [PMID:19969290]. RELL2 expression is constrained post-transcriptionally by miR-18a and at the level of intron-4 splicing by the RNA helicase DHX38, and in both breast cancer and pancreatic ductal adenocarcinoma RELL2 acts as an anti-metastatic, anti-proliferative, pro-apoptotic factor whose loss promotes migration and chemoresistance [PMID:30817902, PMID:37506056].","teleology":[{"year":2005,"claim":"Established RELL2 as a member of a plasma-membrane receptor family by showing it associates with RELT and RELL1 and is a kinase substrate, defining its first molecular partners and a candidate signaling input.","evidence":"Reciprocal in vitro co-immunoprecipitation with fluorescence co-localization, plus yeast two-hybrid and in vitro kinase assay identifying OSR1/OXSR1","pmids":["16389068"],"confidence":"High","gaps":["Functional consequence of OSR1 phosphorylation on RELL2 not defined","Phosphorylation site(s) not mapped","Interactions shown in vitro/overexpression, not at endogenous levels"]},{"year":2009,"claim":"Linked RELL2 to programmed cell death by showing its overexpression triggers apoptotic morphology and DNA fragmentation, assigning a functional output to the receptor.","evidence":"Transient overexpression in HEK293 with DNA fragmentation assay and morphological analysis","pmids":["19969290"],"confidence":"Medium","gaps":["Overexpression phenotype may not reflect endogenous physiology","Death pathway (caspase dependence, upstream trigger) not delineated"]},{"year":2017,"claim":"Placed RELL2 in a defined signaling cascade by showing it activates p38 MAPK through OSR1 and TRAF2, connecting its membrane partners to a downstream stress-kinase output.","evidence":"Overexpression with dominant-negative OSR1 and TRAF2 constructs and western blotting for p38 activation in HEK293","pmids":["28688764"],"confidence":"Medium","gaps":["Epistasis based on dominant-negative constructs in overexpression context","Endogenous receptor ligand/stimulus driving p38 activation unknown","Relationship between p38 activation and the apoptotic phenotype not resolved"]},{"year":2019,"claim":"Identified a post-transcriptional brake on RELL2 and a tumor-suppressive role, showing miR-18a directly silences RELL2 to promote breast cancer migration.","evidence":"Luciferase reporter target validation, siRNA knockdown, qPCR/western, and migration/invasion assays in 4T1 and MDA-MB-231 cells","pmids":["30817902"],"confidence":"Medium","gaps":["Mechanism by which RELL2 restrains migration not defined","Single lab; in vivo metastasis effect not established"]},{"year":2020,"claim":"Extended the RELL2 interactome to the transcription factor MDFIC, raising a possible link between membrane signaling and transcriptional output.","evidence":"Yeast two-hybrid, in vitro co-immunoprecipitation, fluorescence co-localization with deletion-mutant mapping","pmids":["33367115"],"confidence":"Medium","gaps":["Functional consequence of RELL2–MDFIC interaction unknown","Whether MDFIC transcriptional activity is altered by RELL2 not tested"]},{"year":2023,"claim":"Revealed a splicing-level control of RELL2 by DHX38 and reinforced its anti-oncogenic role in pancreatic ductal adenocarcinoma.","evidence":"RIP-qPCR showing direct DHX38–RELL2 pre-mRNA interaction, intron-4 retention analysis, and proliferation/gemcitabine cytotoxicity/apoptosis assays","pmids":["37506056"],"confidence":"Medium","gaps":["Functional difference between intron-4-retained and spliced RELL2 isoforms not characterized","Single lab; mechanism connecting RELL2 to chemosensitivity not resolved"]},{"year":null,"claim":"The physiological ligand/stimulus that activates RELL2 at the cell surface and how its phosphorylation, p38 activation, apoptosis, and tumor-suppressive functions are mechanistically integrated remain unknown.","evidence":"No discovery in the corpus addresses endogenous receptor activation or a unifying mechanism","pmids":[],"confidence":"Low","gaps":["No endogenous activating ligand or stimulus identified","No structural model of RELL2 or its complexes","Link between phosphorylation state and downstream outputs untested"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060089","term_label":"molecular transducer activity","supporting_discovery_ids":[0,3]}],"localization":[{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[0,4]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[3]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[2]}],"complexes":[],"partners":["RELT","RELL1","OXSR1","TRAF2","MDFIC","DHX38"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q8NC24","full_name":"RELT-like protein 2","aliases":[],"length_aa":303,"mass_kda":32.4,"function":"Induces activation of MAPK14/p38 cascade, when overexpressed (PubMed:28688764). Induces apoptosis, when overexpressed (PubMed:19969290)","subcellular_location":"Cell membrane","url":"https://www.uniprot.org/uniprotkb/Q8NC24/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/RELL2","classification":"Not Classified","n_dependent_lines":1,"n_total_lines":1208,"dependency_fraction":0.0008278145695364238},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/RELL2","total_profiled":1310},"omim":[{"mim_id":"611213","title":"RELT-LIKE 2; RELL2","url":"https://www.omim.org/entry/611213"},{"mim_id":"611212","title":"RELT-LIKE 1; RELL1","url":"https://www.omim.org/entry/611212"},{"mim_id":"611211","title":"RECEPTOR EXPRESSED IN LYMPHOID TISSUES; RELT","url":"https://www.omim.org/entry/611211"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Uncertain","locations":[{"location":"Vesicles","reliability":"Uncertain"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":35.0},{"tissue":"parathyroid gland","ntpm":15.2},{"tissue":"pituitary gland","ntpm":15.6}],"url":"https://www.proteinatlas.org/search/RELL2"},"hgnc":{"alias_symbol":["FLJ90583"],"prev_symbol":["C5orf16"]},"alphafold":{"accession":"Q8NC24","domains":[{"cath_id":"1.20.5","chopping":"16-46","consensus_level":"medium","plddt":91.4694,"start":16,"end":46}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8NC24","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q8NC24-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q8NC24-F1-predicted_aligned_error_v6.png","plddt_mean":59.09},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=RELL2","jax_strain_url":"https://www.jax.org/strain/search?query=RELL2"},"sequence":{"accession":"Q8NC24","fasta_url":"https://rest.uniprot.org/uniprotkb/Q8NC24.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q8NC24/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8NC24"}},"corpus_meta":[{"pmid":"19969290","id":"PMC_19969290","title":"RELT induces cellular death in HEK 293 epithelial cells.","date":"2009","source":"Cellular immunology","url":"https://pubmed.ncbi.nlm.nih.gov/19969290","citation_count":39,"is_preprint":false},{"pmid":"28688764","id":"PMC_28688764","title":"RELT family members activate p38 and induce apoptosis by a mechanism distinct from TNFR1.","date":"2017","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/28688764","citation_count":38,"is_preprint":false},{"pmid":"30817902","id":"PMC_30817902","title":"Targeted regulation of Rell2 by microRNA-18a is implicated in the anti-metastatic effect of polyphyllin VI in breast cancer cells.","date":"2019","source":"European journal of pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/30817902","citation_count":31,"is_preprint":false},{"pmid":"16389068","id":"PMC_16389068","title":"Identification of RELT homologues that associate with RELT and are phosphorylated by OSR1.","date":"2005","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/16389068","citation_count":31,"is_preprint":false},{"pmid":"37893069","id":"PMC_37893069","title":"The RELT Family of Proteins: An Increasing Awareness of Their Importance for Cancer, the Immune System, and Development.","date":"2023","source":"Biomedicines","url":"https://pubmed.ncbi.nlm.nih.gov/37893069","citation_count":12,"is_preprint":false},{"pmid":"37506056","id":"PMC_37506056","title":"DHX38 restricts chemoresistance by regulating the alternative pre-mRNA splicing of RELL2 in pancreatic ductal adenocarcinoma.","date":"2023","source":"PLoS genetics","url":"https://pubmed.ncbi.nlm.nih.gov/37506056","citation_count":9,"is_preprint":false},{"pmid":"35634441","id":"PMC_35634441","title":"Comprehensive Analysis of RELL2 as a Potential Biomarker Associated with Tumor Immune Infiltrating Cells in a Pan-Cancer Analysis.","date":"2022","source":"Disease markers","url":"https://pubmed.ncbi.nlm.nih.gov/35634441","citation_count":8,"is_preprint":false},{"pmid":"33367115","id":"PMC_33367115","title":"RELT stains prominently in B-cell lymphomas and binds the hematopoietic transcription factor MDFIC.","date":"2020","source":"Biochemistry and biophysics reports","url":"https://pubmed.ncbi.nlm.nih.gov/33367115","citation_count":6,"is_preprint":false},{"pmid":"35669261","id":"PMC_35669261","title":"The Vulnerability to Methamphetamine Dependence and Genetics: A Case-Control Study Focusing on Genetic Polymorphisms at Chromosomal Region 5q31.3.","date":"2022","source":"Frontiers in psychiatry","url":"https://pubmed.ncbi.nlm.nih.gov/35669261","citation_count":3,"is_preprint":false},{"pmid":"39767574","id":"PMC_39767574","title":"RELT Is Upregulated in Breast Cancer and Induces Death in Breast Cancer Cells.","date":"2024","source":"Biomedicines","url":"https://pubmed.ncbi.nlm.nih.gov/39767574","citation_count":1,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":7188,"output_tokens":1597,"usd":0.022759,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":8322,"output_tokens":2369,"usd":0.050417,"stage2_stop_reason":"end_turn"},"total_usd":0.073176,"stage1_batch_id":"msgbatch_01CNoDbkChHEkgrJnL7BwtGJ","stage2_batch_id":"msgbatch_016Y4x9E9Wg5VQDANj9quSQD","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2005,\n      \"finding\": \"RELL2 physically interacts with RELT and RELL1, as demonstrated by in vitro co-immunoprecipitation experiments, and co-localizes with them at the plasma membrane.\",\n      \"method\": \"In vitro co-immunoprecipitation, fluorescence co-localization\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal Co-IP with co-localization, single lab, two orthogonal methods\",\n      \"pmids\": [\"16389068\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"RELL2 is phosphorylated by the OSR1 (OXSR1) kinase, as shown by an in vitro kinase assay; OSR1 was identified as an interactor via yeast two-hybrid screen and confirmed by co-immunoprecipitation.\",\n      \"method\": \"Yeast two-hybrid screen, in vitro co-immunoprecipitation, in vitro kinase assay\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro kinase assay combined with yeast two-hybrid and Co-IP in single study, single lab\",\n      \"pmids\": [\"16389068\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Overexpression of RELL2 in HEK 293 epithelial cells induces cell death with morphological characteristics consistent with apoptosis (cell rounding, lifting, and DNA fragmentation).\",\n      \"method\": \"Transient transfection, DNA fragmentation assay, morphological analysis\",\n      \"journal\": \"Cellular immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — overexpression phenotype with DNA fragmentation readout, single lab, replicated across RELT family members\",\n      \"pmids\": [\"19969290\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"RELL2 overexpression activates the p38 MAPK pathway in HEK-293 cells more substantially than RELT, and this activation is blocked by dominant-negative forms of OSR1 or TRAF2, implicating these molecules in RELL2 signaling.\",\n      \"method\": \"Transient transfection, dominant-negative mutant constructs, western blotting for p38 activation\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — epistasis via dominant-negative mutants with defined pathway placement, single lab, two inhibitory constructs tested\",\n      \"pmids\": [\"28688764\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"RELL2 physically interacts with the transcription factor MDFIC, as demonstrated by in vitro co-immunoprecipitation; MDFIC co-localizes with RELL2 most prominently at the plasma membrane.\",\n      \"method\": \"Yeast two-hybrid (RELL1 bait identifying MDFIC), in vitro co-immunoprecipitation, fluorescence co-localization\",\n      \"journal\": \"Biochemistry and biophysics reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with co-localization and deletion-mutant mapping, single lab, two orthogonal methods\",\n      \"pmids\": [\"33367115\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RELL2 is a direct target of miR-18a; miR-18a suppresses RELL2 expression and promotes breast cancer cell migration, while RELL2 itself has anti-metastatic functions in 4T1 and MDA-MB-231 cells.\",\n      \"method\": \"Luciferase reporter assay (target validation), real-time PCR, western blotting, siRNA knockdown, migration/invasion assays\",\n      \"journal\": \"European journal of pharmacology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — luciferase reporter + siRNA knockdown with functional phenotype, single lab, multiple orthogonal methods\",\n      \"pmids\": [\"30817902\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"DHX38 directly interacts with RELL2 pre-mRNA and regulates alternative splicing (intron 4 retention) of RELL2; altered DHX38 expression causes corresponding changes in RELL2 intron 4 retention, and RELL2 plays an anti-oncogenic role in pancreatic ductal adenocarcinoma as shown by cell proliferation, gemcitabine cytotoxicity, and apoptosis assays.\",\n      \"method\": \"RIP-qPCR, overexpression/knockdown functional assays (proliferation, cytotoxicity, apoptosis), intron retention analysis\",\n      \"journal\": \"PLoS genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — RIP-qPCR demonstrating direct DHX38–RELL2 RNA interaction plus functional assays, single lab, multiple orthogonal methods\",\n      \"pmids\": [\"37506056\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"RELL2 is a TNF receptor family member that localizes to the plasma membrane, physically associates with RELT, RELL1, MDFIC, and the OSR1/OXSR1 kinase (which phosphorylates it), activates the p38 MAPK pathway via OSR1 and TRAF2, and induces apoptosis when overexpressed; its expression is post-transcriptionally regulated by miR-18a and at the splicing level by the RNA helicase DHX38, with loss of RELL2 promoting cancer cell migration and chemoresistance.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"RELL2 is a TNF receptor-family-associated protein that functions in plasma-membrane-anchored signaling controlling apoptosis, stress-kinase activation, and tumor cell behavior [#0, #3]. It physically associates with the related receptors RELT and RELL1 and co-localizes with them at the plasma membrane [#0], and engages the transcription factor MDFIC, which is recruited to the same membrane compartment [#4]. RELL2 is a substrate of the OSR1/OXSR1 kinase, which binds and phosphorylates it [#1], and its overexpression drives activation of the p38 MAPK pathway in a manner dependent on OSR1 and TRAF2 [#3] and induces apoptotic cell death [#2]. RELL2 expression is constrained post-transcriptionally by miR-18a and at the level of intron-4 splicing by the RNA helicase DHX38, and in both breast cancer and pancreatic ductal adenocarcinoma RELL2 acts as an anti-metastatic, anti-proliferative, pro-apoptotic factor whose loss promotes migration and chemoresistance [#5, #6].\",\n  \"teleology\": [\n    {\n      \"year\": 2005,\n      \"claim\": \"Established RELL2 as a member of a plasma-membrane receptor family by showing it associates with RELT and RELL1 and is a kinase substrate, defining its first molecular partners and a candidate signaling input.\",\n      \"evidence\": \"Reciprocal in vitro co-immunoprecipitation with fluorescence co-localization, plus yeast two-hybrid and in vitro kinase assay identifying OSR1/OXSR1\",\n      \"pmids\": [\"16389068\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Functional consequence of OSR1 phosphorylation on RELL2 not defined\",\n        \"Phosphorylation site(s) not mapped\",\n        \"Interactions shown in vitro/overexpression, not at endogenous levels\"\n      ]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Linked RELL2 to programmed cell death by showing its overexpression triggers apoptotic morphology and DNA fragmentation, assigning a functional output to the receptor.\",\n      \"evidence\": \"Transient overexpression in HEK293 with DNA fragmentation assay and morphological analysis\",\n      \"pmids\": [\"19969290\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Overexpression phenotype may not reflect endogenous physiology\",\n        \"Death pathway (caspase dependence, upstream trigger) not delineated\"\n      ]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Placed RELL2 in a defined signaling cascade by showing it activates p38 MAPK through OSR1 and TRAF2, connecting its membrane partners to a downstream stress-kinase output.\",\n      \"evidence\": \"Overexpression with dominant-negative OSR1 and TRAF2 constructs and western blotting for p38 activation in HEK293\",\n      \"pmids\": [\"28688764\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Epistasis based on dominant-negative constructs in overexpression context\",\n        \"Endogenous receptor ligand/stimulus driving p38 activation unknown\",\n        \"Relationship between p38 activation and the apoptotic phenotype not resolved\"\n      ]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Identified a post-transcriptional brake on RELL2 and a tumor-suppressive role, showing miR-18a directly silences RELL2 to promote breast cancer migration.\",\n      \"evidence\": \"Luciferase reporter target validation, siRNA knockdown, qPCR/western, and migration/invasion assays in 4T1 and MDA-MB-231 cells\",\n      \"pmids\": [\"30817902\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Mechanism by which RELL2 restrains migration not defined\",\n        \"Single lab; in vivo metastasis effect not established\"\n      ]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Extended the RELL2 interactome to the transcription factor MDFIC, raising a possible link between membrane signaling and transcriptional output.\",\n      \"evidence\": \"Yeast two-hybrid, in vitro co-immunoprecipitation, fluorescence co-localization with deletion-mutant mapping\",\n      \"pmids\": [\"33367115\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Functional consequence of RELL2–MDFIC interaction unknown\",\n        \"Whether MDFIC transcriptional activity is altered by RELL2 not tested\"\n      ]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Revealed a splicing-level control of RELL2 by DHX38 and reinforced its anti-oncogenic role in pancreatic ductal adenocarcinoma.\",\n      \"evidence\": \"RIP-qPCR showing direct DHX38–RELL2 pre-mRNA interaction, intron-4 retention analysis, and proliferation/gemcitabine cytotoxicity/apoptosis assays\",\n      \"pmids\": [\"37506056\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Functional difference between intron-4-retained and spliced RELL2 isoforms not characterized\",\n        \"Single lab; mechanism connecting RELL2 to chemosensitivity not resolved\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The physiological ligand/stimulus that activates RELL2 at the cell surface and how its phosphorylation, p38 activation, apoptosis, and tumor-suppressive functions are mechanistically integrated remain unknown.\",\n      \"evidence\": \"No discovery in the corpus addresses endogenous receptor activation or a unifying mechanism\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\n        \"No endogenous activating ligand or stimulus identified\",\n        \"No structural model of RELL2 or its complexes\",\n        \"Link between phosphorylation state and downstream outputs untested\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060089\", \"supporting_discovery_ids\": [0, 3]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [0, 4]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [3]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [2]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"RELT\", \"RELL1\", \"OXSR1\", \"TRAF2\", \"MDFIC\", \"DHX38\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":4,"faith_total":4,"faith_pct":100.0}}