{"gene":"LANCL1","run_date":"2026-06-10T02:59:49","timeline":{"discoveries":[{"year":2000,"finding":"LANCL1 (p40/GPR69A) is a loosely associated peripheral membrane protein located at the cytoplasmic side of the erythrocyte membrane, not a seven-transmembrane G-protein-coupled receptor. It is related to the bacterial LanC family of membrane-associated proteins involved in antimicrobial peptide biosynthesis, suggesting a role as a peptide-modifying enzyme.","method":"Peptide-antibody characterization, sequence analysis, subcellular fractionation","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct subcellular fractionation and sequence analysis in a single lab with two orthogonal methods (antibody-based localization and refined sequence analysis)","pmids":["10944443"],"is_preprint":false},{"year":2005,"finding":"LANCL1 (erythrocyte cytosolic protein) is recruited to the surface of Maurer's clefts in P. falciparum-infected erythrocytes through direct interaction with the parasite integral membrane protein PfSBP1, and this interaction is proposed to be central for late steps of parasite development.","method":"Co-immunoprecipitation / protein interaction, immunofluorescence localization in infected erythrocytes","journal":"Molecular and biochemical parasitology","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — single lab, Co-IP identification of interaction and immunofluorescence-based relocalization, but no functional mutagenesis","pmids":["15811525"],"is_preprint":false},{"year":2014,"finding":"LanCL1 is a neuronal antioxidant protein whose genetic deletion causes enhanced ROS accumulation, lipid/protein/DNA oxidative damage, mitochondrial dysfunction, and apoptotic neurodegeneration in the brain. LanCL1 protein purified from eukaryotic cells catalyzes formation of thioether products similar to glutathione S-transferase activity, constituting a neuron-specific glutathione defense mechanism.","method":"Genetic knockout (LanCL1-deficient mice), LanCL1 transgene rescue, in vitro enzymatic assay with purified eukaryotic LanCL1 protein, ROS/oxidative damage measurements, mitochondrial function assays","journal":"Developmental cell","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — combination of in vitro enzymatic assay, genetic knockout with defined phenotype, transgene rescue, and multiple orthogonal readouts in a single rigorous study","pmids":["25158856"],"is_preprint":false},{"year":2018,"finding":"LanCL1 protects prostate cancer cells from oxidative stress and promotes proliferation through inhibition of the JNK signaling pathway; siRNA-mediated LanCL1 knockdown increases apoptosis and JNK pathway activation.","method":"siRNA knockdown, Western blot for JNK pathway phosphorylation, cell viability and apoptosis assays","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — single lab, siRNA-based loss-of-function with defined signaling pathway readout but no direct biochemical interaction or rescue experiment","pmids":["29416001"],"is_preprint":false},{"year":2018,"finding":"LanCL1 protects neurons against ischemia-induced oxidative stress by activating the Akt-PGC-1α-Sirt3 signaling pathway, which stimulates mitochondrial enzyme activities and SOD2 deacetylation; knockdown of PGC-1α or Akt blockade partially prevented LanCL1 protective effects.","method":"Lentiviral LanCL1 overexpression in HT22 cells, OGD model, siRNA knockdown of PGC-1α, Akt inhibitor, Western blot for pathway components, mitochondrial function assays, ROS measurement","journal":"Brain research bulletin","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — single lab with multiple orthogonal methods (genetic, pharmacological, biochemical) establishing pathway position","pmids":["30075199"],"is_preprint":false},{"year":2019,"finding":"LanCL1 is a positive regulator of AKT activity; CNS-specific LanCL1 transgene restores impaired AKT activity in ALS model (SOD1G93A) mice and promotes motor neuron survival, delays disease onset, and extends lifespan. CNS-specific LanCL1 deletion causes motor neuron loss, neuroinflammation, and oxidative damage.","method":"Transgenic LanCL1 overexpression and CNS-specific conditional knockout in SOD1G93A mice, Western blot for AKT phosphorylation, behavioral/survival analysis, histopathology","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal gain- and loss-of-function genetic experiments in vivo with defined molecular (AKT activation) and cellular (motor neuron survival) readouts","pmids":["31570855"],"is_preprint":false},{"year":2020,"finding":"Recombinant human LanCL1 has less than 10% the specific activity of GST (negative finding: LanCL1 does not act as a classical GST enzyme in vivo). CRISPR-Cas9 knockout of LanCL1 in HeLa cells sensitizes to H2O2 toxicity, decreases UCH deubiquitinase activity, and reduces protein levels of DUBs (A20/TNFAIP3, USP9X, USP10). Addition of recombinant LanCL1 plus GSH recovers UCH activity in H2O2-treated lysates, indicating LanCL1 positively regulates redox-sensitive deubiquitinating enzymes.","method":"CRISPR-Cas9 stable knockout, in vitro enzymatic activity assay for GST and UCH/DUB, Western blot, proteasome inhibitor experiments (bortezomib), GSH/GSSG measurement, recombinant protein reconstitution","journal":"Free radical biology & medicine","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — in vitro reconstitution of DUB activity with recombinant LanCL1 plus stable genetic knockout with multiple orthogonal biochemical readouts in a single rigorous study","pmids":["33049334"],"is_preprint":false},{"year":2021,"finding":"Human recombinant LANCL1 binds abscisic acid (ABA) with a Kd of 1–10 µM (lower affinity than LANCL2). LANCL1 overexpression in L6 myoblasts stimulates basal and ABA-triggered glucose uptake (~4-fold), increases GLUT4 and GLUT1 expression, activates the AMPK/PGC-1α/Sirt1 signaling axis (~2-fold), and stimulates mitochondrial respiration and expression of uncoupling proteins (sarcolipin, UCP3). LANCL2-knockout mice spontaneously overexpress LANCL1 in skeletal muscle and respond to ABA with improved glycemia and GLUT/AMPK/PGC-1α/Sirt1/sarcolipin/UCP3 transcription.","method":"Equilibrium binding with [3H]ABA, circular dichroism, surface plasmon resonance, fluorescent glucose analog (NBDG) uptake assay, Western blot, qPCR, LANCL2-/- mouse model, viral overexpression and siRNA silencing in L6 cells","journal":"Molecular metabolism","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — three independent binding assays (radioligand, CD, SPR) plus multiple functional assays in cell and animal models establishing ABA receptor function and downstream signaling","pmids":["34098144"],"is_preprint":false},{"year":2022,"finding":"In H9c2 cardiomyoblasts under hypoxia/reoxygenation, LANCL1 (and LANCL2) overexpression increases phosphorylation of Akt, AMPK, and eNOS; stimulates NO production; increases glucose uptake and NADPH levels; and improves cell survival. Silencing LANCL1/2 has the opposite effects. L-NAME (NOS inhibitor) abrogates ABA/LANCL1-mediated protection, placing NO production downstream of LANCL1 in the hypoxia-protection pathway.","method":"Viral overexpression and siRNA silencing of LANCL1/2 in H9c2 cells, hypoxia/reoxygenation model, Western blot for Akt/AMPK/eNOS phosphorylation, NOS inhibitor (L-NAME), fluorescent glucose uptake assay, mitochondrial proton gradient measurement","journal":"Cells","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal gain/loss-of-function with pharmacological pathway dissection in a single lab","pmids":["36139463"],"is_preprint":false},{"year":2022,"finding":"LanCL1 expression in spermatocytes is transcriptionally regulated by transcription factor SP1 in response to spermatogenic reactive oxygen species. LanCL1 deletion causes spermatozoal oxidative damage and impaired male fertility; LanCL1 transgene protects against high-fat-diet-induced oxidative damage and subfertility in mice.","method":"LanCL1 knockout and transgenic mouse models, semen analysis, histopathology, SP1 transcription factor analysis, ROS measurement","journal":"Lab animal","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal genetic mouse models (KO and transgene) with defined phenotype and transcriptional regulator identification, single lab","pmids":["35469022"],"is_preprint":false},{"year":2023,"finding":"LANCL1 functions as a cell surface protein in hepatocellular carcinoma cells and directly binds FAM49B as a downstream partner (identified by mass spectrometry). LANCL1 stabilizes FAM49B by blocking its interaction with E3 ubiquitin ligase TRIM21, preventing ubiquitin-proteasome degradation of FAM49B. The LANCL1-FAM49B axis suppresses Rac1-NADPH oxidase-driven ROS production independently of LANCL1's glutathione transferase function.","method":"siRNA library screen, immunofluorescence for membrane localization, limiting dilution assay in vivo, mass spectrometry (pulldown for FAM49B identification), Co-IP for LANCL1-FAM49B and FAM49B-TRIM21 interactions, ubiquitination assays, Rac1 activity assay, ROS measurement","journal":"Hepatology (Baltimore, Md.)","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — MS-based binding partner identification validated by Co-IP, ubiquitination mechanism established, in vivo tumor initiation assay, multiple orthogonal methods in a single rigorous study","pmids":["37540188"],"is_preprint":false},{"year":2023,"finding":"LANCL1/2 overexpression or silencing controls mitochondrial number, OXPHOS complex I, proton gradient, glucose and palmitate-dependent respiration, and expression of cytoskeletal/contractile/ion channel proteins in H9c2 cardiomyoblasts. These effects are mediated by transcription factor ERRα, which acts upstream of the AMPK/PGC-1α axis and is itself transcriptionally controlled by the ABA-LANCL1/2 system.","method":"Viral overexpression and siRNA silencing of LANCL1/2, mitochondrial function assays (Seahorse), Western blot, qPCR, ERRα transcription factor analysis in H9c2 cells","journal":"Antioxidants (Basel, Switzerland)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal gain/loss-of-function with identification of upstream transcription factor (ERRα) and downstream pathway, single lab","pmids":["37759995"],"is_preprint":false},{"year":2024,"finding":"Hypothalamic LanCL1 transcription is regulated by both PGC-1α and SP1 through direct interaction of these two factors. Under high-fat diet, short-term ROS exposure activates PGC-1α to elevate LanCL1 expression, while long-term exposure promotes ubiquitin-mediated PGC-1α degradation and suppresses LanCL1, establishing a PGC-1α-SP1-LanCL1 regulatory axis in hypothalamic antioxidant defense.","method":"Hypothalamic LanCL1 overexpression/knockout mouse models, high-fat diet model, Co-immunoprecipitation of PGC-1α and SP1, Western blot for ubiquitination and pathway components, qPCR","journal":"Antioxidants (Basel, Switzerland)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP establishing PGC-1α/SP1 direct interaction, reciprocal mouse genetic models with defined hypothalamic phenotype, single lab","pmids":["38397850"],"is_preprint":false},{"year":2026,"finding":"LanCL1 overexpression in retinal ganglion cells (via intravitreal AAV2) promotes neuroprotection and axon regeneration after optic nerve crush injury in vivo; axons extend through the full optic nerve when combined with fibronectin-based recombinant small protein. However, LanCL1 transgene does NOT activate the mTOR pathway marker pS6 in injured RGCs (negative finding for mTOR mechanism).","method":"AAV2-mediated LanCL1 overexpression in mouse RGCs, optic nerve crush injury model, axon tracing, immunostaining for pS6 (mTOR marker), scRNA-seq characterization of Lancl1-3 expression in RGC subtypes","journal":"Experimental neurology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo gain-of-function with defined regeneration phenotype and explicit negative result for mTOR, single lab","pmids":["42002019"],"is_preprint":false},{"year":2026,"finding":"LanCL1 is a critical mediator of neuropathic hypersensitivity. The novel peptide ligand LAT8881 binds LanCL1 in the spinal cord (confirmed by photoaffinity pulldown), suppresses ectopic firing at the DRG, reduces wind-up and spontaneous activity in dorsal horn neurons, and reverses mechanical allodynia in multiple rodent neuropathic models. siRNA knockdown of LanCL1 in DRG blocked LAT8881 activity. In neuropathic models, LanCL1 undergoes functional reorganization: reduced cytosolic expression in DRG neurons with increased expression in satellite glia.","method":"Photoaffinity conjugate pulldown of LanCL1 from spinal cord, siRNA knockdown in DRG, ex vivo spinal cord electrophysiology, in vivo electrophysiology (DRG ectopic firing, dorsal horn unit recording), behavioral allodynia testing in CCI and other rodent models, immunohistochemistry for LanCL1 localization","journal":"Pain","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — photoaffinity-based binding target identification validated by siRNA knockdown, multiple orthogonal electrophysiological and behavioral readouts, multiple neuropathic models","pmids":["42263267"],"is_preprint":false},{"year":2026,"finding":"LANCL1-SIRT3-SOD2 axis: LANCL1 downregulation (in obstructive jaundice) inhibits SIRT3-mediated deacetylation of SOD2, impairing antioxidant capacity and increasing oxidative stress and hepatocyte apoptosis. LANCL1 overexpression restores SIRT3 expression and SOD2 deacetylation, attenuating liver injury.","method":"In vivo bile duct ligation model, in vitro BDL-serum-treated BRL-3A hepatocytes, LANCL1 overexpression, Western blot for SIRT3 and SOD2 deacetylation, ROS/MDA/SOD assays, H&E histology, proteomic serum analysis","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal in vivo and in vitro models with defined SIRT3/SOD2 deacetylation mechanism, single lab","pmids":["42001717"],"is_preprint":false}],"current_model":"LANCL1 is a cytoplasmic peripheral membrane protein that functions as both an abscisic acid receptor (binding ABA with µM affinity) and a neuronal antioxidant regulator: it catalyzes glutathione-dependent thioether formation, positively regulates redox-sensitive deubiquitinating enzymes (UCH/USP family), activates AKT and the AMPK/PGC-1α/Sirt1/ERRα signaling axis to stimulate glucose uptake, mitochondrial respiration, and NO production, suppresses ROS via the FAM49B-Rac1-NADPH oxidase axis (by protecting FAM49B from TRIM21-mediated ubiquitin-proteasome degradation), and promotes neuronal survival and axon regeneration; its transcription is regulated by SP1 and PGC-1α in response to oxidative stress signals, and it mediates neuropathic hypersensitivity through functional reorganization in DRG neurons and satellite glia."},"narrative":{"mechanistic_narrative":"LANCL1 is a cytoplasmic peripheral membrane protein, related to the bacterial LanC family of peptide-modifying enzymes, that functions broadly as a neuronal antioxidant regulator and metabolic signaling hub [PMID:10944443, PMID:25158856]. Genetic deletion in mice causes ROS accumulation, oxidative damage to lipids, proteins and DNA, mitochondrial dysfunction, and apoptotic neurodegeneration, and purified LANCL1 catalyzes glutathione-dependent thioether formation, defining a neuron-specific glutathione defense activity [PMID:25158856]. LANCL1 sustains cellular redox homeostasis through several convergent routes: it positively regulates redox-sensitive deubiquitinating enzymes (UCH/USP-family DUBs including A20/TNFAIP3, USP9X and USP10) in a manner reconstituted in vitro by recombinant LANCL1 plus GSH, even though it lacks classical glutathione-S-transferase activity in vivo [PMID:33049334]; it activates AKT and the PGC-1α/SIRT3 axis to drive SOD2 deacetylation and mitochondrial enzyme function [PMID:30075199, PMID:42001717]; and it stabilizes FAM49B by blocking TRIM21-mediated ubiquitin-proteasome degradation, thereby suppressing Rac1-NADPH oxidase-driven ROS independently of its glutathione-related activity [PMID:37540188]. LANCL1 also binds abscisic acid with µM affinity and acts as an ABA receptor that activates an AMPK/PGC-1α/Sirt1/ERRα signaling axis to stimulate glucose uptake, mitochondrial respiration, and eNOS-dependent NO production in muscle and cardiac cells [PMID:34098144, PMID:36139463, PMID:37759995]. In the nervous system these activities translate into neuroprotection: CNS-specific LANCL1 expression restores AKT activity and prolongs survival in ALS model mice [PMID:31570855], LANCL1 promotes retinal ganglion cell survival and axon regeneration after optic nerve injury independently of mTOR signaling [PMID:42002019], and LANCL1 mediates neuropathic hypersensitivity, serving as the spinal target of the analgesic peptide LAT8881 [PMID:42263267]. Its own transcription is controlled by a PGC-1α–SP1 regulatory axis responsive to oxidative stress [PMID:35469022, PMID:38397850].","teleology":[{"year":2000,"claim":"Established that LANCL1, despite the GPR69A designation, is not a seven-transmembrane GPCR but a peripheral cytoplasmic membrane protein related to bacterial LanC peptide-modifying enzymes, reframing the search for its molecular function.","evidence":"Peptide-antibody localization, sequence analysis, and subcellular fractionation of erythrocyte membranes","pmids":["10944443"],"confidence":"Medium","gaps":["No enzymatic substrate identified","Family relationship suggests but does not demonstrate a catalytic activity"]},{"year":2005,"claim":"Showed LANCL1 can be recruited to a pathogen-induced membrane structure via direct interaction with a parasite protein, the first physical partner identified.","evidence":"Co-immunoprecipitation and immunofluorescence in P. falciparum-infected erythrocytes (PfSBP1 interaction)","pmids":["15811525"],"confidence":"Medium","gaps":["No functional mutagenesis of the interaction","Host-cell relevance to mammalian LANCL1 function unclear"]},{"year":2014,"claim":"Defined LANCL1 as a neuron-specific antioxidant whose loss drives oxidative neurodegeneration, and assigned it a glutathione-dependent thioether-forming activity.","evidence":"LanCL1 knockout and transgene-rescue mice, in vitro enzymatic assay with purified protein, ROS and mitochondrial readouts","pmids":["25158856"],"confidence":"High","gaps":["Physiological thioether substrate not identified","Relationship between catalytic activity and neuroprotection not resolved"]},{"year":2018,"claim":"Connected LANCL1 antioxidant function to defined signaling outputs in disease contexts, linking it to JNK suppression in cancer and AKT-PGC-1α-Sirt3 activation in neuronal ischemia.","evidence":"siRNA knockdown in prostate cancer cells and lentiviral overexpression in HT22 cells with OGD, pathway inhibitor dissection","pmids":["29416001","30075199"],"confidence":"Medium","gaps":["No direct biochemical link between LANCL1 and these kinases","Mechanism of pathway engagement unknown"]},{"year":2019,"claim":"Demonstrated in vivo that LANCL1 is a positive regulator of AKT activity and that restoring it confers motor neuron protection in an ALS model, establishing therapeutic relevance.","evidence":"Reciprocal CNS-specific transgenic and conditional knockout SOD1G93A mice with AKT phosphorylation and survival readouts","pmids":["31570855"],"confidence":"High","gaps":["Direct mechanism by which LANCL1 activates AKT not defined","Whether AKT activation is upstream or parallel to antioxidant function unclear"]},{"year":2020,"claim":"Revised the enzymatic model: LANCL1 is not a functional GST in vivo but positively regulates redox-sensitive deubiquitinases, reconstituted by recombinant LANCL1 plus GSH.","evidence":"CRISPR knockout in HeLa, in vitro GST/UCH/DUB activity assays, recombinant protein plus GSH reconstitution, proteasome inhibition","pmids":["33049334"],"confidence":"High","gaps":["Molecular mechanism by which LANCL1 protects DUBs not defined","Direct DUB-LANCL1 binding not shown"]},{"year":2021,"claim":"Identified LANCL1 as a µM-affinity abscisic acid receptor coupling ABA to an AMPK/PGC-1α/Sirt1 axis that stimulates glucose uptake and mitochondrial respiration.","evidence":"Radioligand binding, CD, SPR, NBDG glucose uptake, qPCR/Western, LANCL2-knockout mice, overexpression/silencing in L6 myoblasts","pmids":["34098144"],"confidence":"High","gaps":["Structural basis of ABA binding not resolved","Endogenous mammalian ABA source and physiological role uncertain"]},{"year":2022,"claim":"Extended the ABA-LANCL1 axis to cardiac cells and placed NO production downstream, with ERRα identified as an upstream transcription factor controlling mitochondrial biogenesis.","evidence":"Reciprocal overexpression/silencing of LANCL1/2 in H9c2 cells, hypoxia/reoxygenation, L-NAME inhibition, Seahorse assays, ERRα analysis","pmids":["36139463","37759995"],"confidence":"Medium","gaps":["Direct vs indirect control of ERRα not distinguished","LANCL1 vs LANCL2 specific contributions not separated"]},{"year":2022,"claim":"Established a transcriptional control loop: SP1 drives LANCL1 expression in response to oxidative stress, and LANCL1 is required for protection of spermatozoa against oxidative damage.","evidence":"LanCL1 knockout and transgenic mice, semen analysis, high-fat-diet model, SP1 transcription factor analysis","pmids":["35469022"],"confidence":"Medium","gaps":["Direct SP1 binding to the LanCL1 promoter not demonstrated in this finding","Tissue specificity of SP1 regulation unclear"]},{"year":2023,"claim":"Uncovered a glutathione-independent antioxidant mechanism: LANCL1 stabilizes FAM49B by blocking TRIM21-mediated degradation, suppressing Rac1-NADPH oxidase-driven ROS.","evidence":"siRNA screen, mass spectrometry partner identification, Co-IP, ubiquitination and Rac1 activity assays, in vivo tumor initiation in hepatocellular carcinoma","pmids":["37540188"],"confidence":"High","gaps":["Reported cell-surface localization conflicts with earlier cytoplasmic localization and is unexplained","Structural basis of LANCL1-FAM49B binding unknown"]},{"year":2024,"claim":"Defined a PGC-1α–SP1 regulatory axis controlling LANCL1 transcription, with biphasic ROS responses determining whether LANCL1 is induced or suppressed.","evidence":"Hypothalamic LanCL1 overexpression/knockout mice, high-fat diet, Co-IP of PGC-1α and SP1, ubiquitination Western blots","pmids":["38397850"],"confidence":"Medium","gaps":["Direct promoter occupancy not mapped","Generality of the biphasic switch across tissues untested"]},{"year":2026,"claim":"Demonstrated LANCL1's roles in axon regeneration and neuropathic pain, including target validation of an analgesic peptide, while excluding mTOR as the regeneration mechanism.","evidence":"AAV2 LanCL1 overexpression in RGCs with optic nerve crush, pS6 immunostaining; photoaffinity pulldown of LanCL1 by LAT8881, DRG siRNA, spinal electrophysiology and behavioral allodynia in rodent models; LANCL1-SIRT3-SOD2 axis in bile duct ligation","pmids":["42002019","42263267","42001717"],"confidence":"High","gaps":["Molecular pathway driving axon regeneration not identified given mTOR exclusion","Mechanism of LANCL1 functional reorganization between neurons and glia unknown"]},{"year":null,"claim":"The unifying molecular activity linking LANCL1's glutathione-related catalysis, ABA receptor function, DUB/FAM49B protein stabilization, and kinase activation remains undefined.","evidence":"No single study reconciles the enzymatic, receptor, and scaffold/stabilizer activities into one biochemical mechanism","pmids":[],"confidence":"Low","gaps":["No structural model integrating ABA binding and catalytic/scaffold functions","Whether one activity is primary and others downstream is unresolved","Endogenous physiological ligand(s) and substrate(s) unidentified"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[6,10]},{"term_id":"GO:0140299","term_label":"molecular sensor activity","supporting_discovery_ids":[7]},{"term_id":"GO:0016740","term_label":"transferase activity","supporting_discovery_ids":[2]},{"term_id":"GO:0140313","term_label":"molecular sequestering activity","supporting_discovery_ids":[10]},{"term_id":"GO:0016209","term_label":"antioxidant activity","supporting_discovery_ids":[2]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[0,2]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[0,10]}],"pathway":[{"term_id":"R-HSA-8953897","term_label":"Cellular responses to stimuli","supporting_discovery_ids":[2,6]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[4,5,7]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[7,11]},{"term_id":"R-HSA-112316","term_label":"Neuronal System","supporting_discovery_ids":[13,14]}],"complexes":[],"partners":["FAM49B","TRIM21","PFSBP1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O43813","full_name":"Glutathione S-transferase LANCL1","aliases":["40 kDa erythrocyte membrane protein","p40","LanC-like protein 1"],"length_aa":399,"mass_kda":45.3,"function":"Functions as a glutathione transferase. Catalyzes conjugation of the glutathione (GSH) to artificial substrates 1-chloro-2,4-dinitrobenzene (CDNB) and p-nitrophenyl acetate. Mitigates neuronal oxidative stress during normal postnatal development and in response to oxidative stresses probably through GSH antioxidant defense mechanism (By similarity). May play a role in EPS8 signaling. Binds glutathione (PubMed:19528316)","subcellular_location":"Cytoplasm; Cell membrane","url":"https://www.uniprot.org/uniprotkb/O43813/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/LANCL1","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":[{"gene":"CAPZB","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/LANCL1","total_profiled":1310},"omim":[{"mim_id":"612919","title":"LanC-LIKE 2; LANCL2","url":"https://www.omim.org/entry/612919"},{"mim_id":"604155","title":"LanC-LIKE 1; LANCL1","url":"https://www.omim.org/entry/604155"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Microtubules","reliability":"Approved"},{"location":"Primary cilium","reliability":"Approved"},{"location":"Basal body","reliability":"Approved"},{"location":"End piece","reliability":"Approved"},{"location":"Flagellar centriole","reliability":"Additional"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in all","driving_tissues":[{"tissue":"brain","ntpm":161.6}],"url":"https://www.proteinatlas.org/search/LANCL1"},"hgnc":{"alias_symbol":["p40"],"prev_symbol":["GPR69A"]},"alphafold":{"accession":"O43813","domains":[{"cath_id":"-","chopping":"58-173","consensus_level":"medium","plddt":96.6203,"start":58,"end":173}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O43813","model_url":"https://alphafold.ebi.ac.uk/files/AF-O43813-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O43813-F1-predicted_aligned_error_v6.png","plddt_mean":97.5},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=LANCL1","jax_strain_url":"https://www.jax.org/strain/search?query=LANCL1"},"sequence":{"accession":"O43813","fasta_url":"https://rest.uniprot.org/uniprotkb/O43813.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O43813/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O43813"}},"corpus_meta":[{"pmid":"25158856","id":"PMC_25158856","title":"Developmental and activity-dependent expression of LanCL1 confers antioxidant activity required for neuronal survival.","date":"2014","source":"Developmental cell","url":"https://pubmed.ncbi.nlm.nih.gov/25158856","citation_count":57,"is_preprint":false},{"pmid":"10944443","id":"PMC_10944443","title":"Characterization of p40/GPR69A as a peripheral membrane protein related to the lantibiotic synthetase component C.","date":"2000","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/10944443","citation_count":47,"is_preprint":false},{"pmid":"29416001","id":"PMC_29416001","title":"LanCL1 protects prostate cancer cells from oxidative stress via suppression of JNK pathway.","date":"2018","source":"Cell death & disease","url":"https://pubmed.ncbi.nlm.nih.gov/29416001","citation_count":37,"is_preprint":false},{"pmid":"34098144","id":"PMC_34098144","title":"LANCL1 binds abscisic acid and stimulates glucose transport and mitochondrial respiration in muscle cells via the AMPK/PGC-1α/Sirt1 pathway.","date":"2021","source":"Molecular metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/34098144","citation_count":36,"is_preprint":false},{"pmid":"11376939","id":"PMC_11376939","title":"Characterization of rat LANCL1, a novel member of the lanthionine synthetase C-like protein family, highly expressed in testis and brain.","date":"2001","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/11376939","citation_count":35,"is_preprint":false},{"pmid":"15811525","id":"PMC_15811525","title":"LANCL1, an erythrocyte protein recruited to the Maurer's clefts during Plasmodium falciparum development.","date":"2005","source":"Molecular and biochemical parasitology","url":"https://pubmed.ncbi.nlm.nih.gov/15811525","citation_count":34,"is_preprint":false},{"pmid":"14514412","id":"PMC_14514412","title":"Germ cell differentiation-dependent and stage-specific expression of LANCL1 in rodent testis.","date":"2003","source":"European journal of histochemistry : 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It is related to the bacterial LanC family of membrane-associated proteins involved in antimicrobial peptide biosynthesis, suggesting a role as a peptide-modifying enzyme.\",\n      \"method\": \"Peptide-antibody characterization, sequence analysis, subcellular fractionation\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct subcellular fractionation and sequence analysis in a single lab with two orthogonal methods (antibody-based localization and refined sequence analysis)\",\n      \"pmids\": [\"10944443\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"LANCL1 (erythrocyte cytosolic protein) is recruited to the surface of Maurer's clefts in P. falciparum-infected erythrocytes through direct interaction with the parasite integral membrane protein PfSBP1, and this interaction is proposed to be central for late steps of parasite development.\",\n      \"method\": \"Co-immunoprecipitation / protein interaction, immunofluorescence localization in infected erythrocytes\",\n      \"journal\": \"Molecular and biochemical parasitology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — single lab, Co-IP identification of interaction and immunofluorescence-based relocalization, but no functional mutagenesis\",\n      \"pmids\": [\"15811525\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"LanCL1 is a neuronal antioxidant protein whose genetic deletion causes enhanced ROS accumulation, lipid/protein/DNA oxidative damage, mitochondrial dysfunction, and apoptotic neurodegeneration in the brain. LanCL1 protein purified from eukaryotic cells catalyzes formation of thioether products similar to glutathione S-transferase activity, constituting a neuron-specific glutathione defense mechanism.\",\n      \"method\": \"Genetic knockout (LanCL1-deficient mice), LanCL1 transgene rescue, in vitro enzymatic assay with purified eukaryotic LanCL1 protein, ROS/oxidative damage measurements, mitochondrial function assays\",\n      \"journal\": \"Developmental cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — combination of in vitro enzymatic assay, genetic knockout with defined phenotype, transgene rescue, and multiple orthogonal readouts in a single rigorous study\",\n      \"pmids\": [\"25158856\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"LanCL1 protects prostate cancer cells from oxidative stress and promotes proliferation through inhibition of the JNK signaling pathway; siRNA-mediated LanCL1 knockdown increases apoptosis and JNK pathway activation.\",\n      \"method\": \"siRNA knockdown, Western blot for JNK pathway phosphorylation, cell viability and apoptosis assays\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — single lab, siRNA-based loss-of-function with defined signaling pathway readout but no direct biochemical interaction or rescue experiment\",\n      \"pmids\": [\"29416001\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"LanCL1 protects neurons against ischemia-induced oxidative stress by activating the Akt-PGC-1α-Sirt3 signaling pathway, which stimulates mitochondrial enzyme activities and SOD2 deacetylation; knockdown of PGC-1α or Akt blockade partially prevented LanCL1 protective effects.\",\n      \"method\": \"Lentiviral LanCL1 overexpression in HT22 cells, OGD model, siRNA knockdown of PGC-1α, Akt inhibitor, Western blot for pathway components, mitochondrial function assays, ROS measurement\",\n      \"journal\": \"Brain research bulletin\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — single lab with multiple orthogonal methods (genetic, pharmacological, biochemical) establishing pathway position\",\n      \"pmids\": [\"30075199\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"LanCL1 is a positive regulator of AKT activity; CNS-specific LanCL1 transgene restores impaired AKT activity in ALS model (SOD1G93A) mice and promotes motor neuron survival, delays disease onset, and extends lifespan. CNS-specific LanCL1 deletion causes motor neuron loss, neuroinflammation, and oxidative damage.\",\n      \"method\": \"Transgenic LanCL1 overexpression and CNS-specific conditional knockout in SOD1G93A mice, Western blot for AKT phosphorylation, behavioral/survival analysis, histopathology\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal gain- and loss-of-function genetic experiments in vivo with defined molecular (AKT activation) and cellular (motor neuron survival) readouts\",\n      \"pmids\": [\"31570855\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Recombinant human LanCL1 has less than 10% the specific activity of GST (negative finding: LanCL1 does not act as a classical GST enzyme in vivo). CRISPR-Cas9 knockout of LanCL1 in HeLa cells sensitizes to H2O2 toxicity, decreases UCH deubiquitinase activity, and reduces protein levels of DUBs (A20/TNFAIP3, USP9X, USP10). Addition of recombinant LanCL1 plus GSH recovers UCH activity in H2O2-treated lysates, indicating LanCL1 positively regulates redox-sensitive deubiquitinating enzymes.\",\n      \"method\": \"CRISPR-Cas9 stable knockout, in vitro enzymatic activity assay for GST and UCH/DUB, Western blot, proteasome inhibitor experiments (bortezomib), GSH/GSSG measurement, recombinant protein reconstitution\",\n      \"journal\": \"Free radical biology & medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — in vitro reconstitution of DUB activity with recombinant LanCL1 plus stable genetic knockout with multiple orthogonal biochemical readouts in a single rigorous study\",\n      \"pmids\": [\"33049334\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Human recombinant LANCL1 binds abscisic acid (ABA) with a Kd of 1–10 µM (lower affinity than LANCL2). LANCL1 overexpression in L6 myoblasts stimulates basal and ABA-triggered glucose uptake (~4-fold), increases GLUT4 and GLUT1 expression, activates the AMPK/PGC-1α/Sirt1 signaling axis (~2-fold), and stimulates mitochondrial respiration and expression of uncoupling proteins (sarcolipin, UCP3). LANCL2-knockout mice spontaneously overexpress LANCL1 in skeletal muscle and respond to ABA with improved glycemia and GLUT/AMPK/PGC-1α/Sirt1/sarcolipin/UCP3 transcription.\",\n      \"method\": \"Equilibrium binding with [3H]ABA, circular dichroism, surface plasmon resonance, fluorescent glucose analog (NBDG) uptake assay, Western blot, qPCR, LANCL2-/- mouse model, viral overexpression and siRNA silencing in L6 cells\",\n      \"journal\": \"Molecular metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — three independent binding assays (radioligand, CD, SPR) plus multiple functional assays in cell and animal models establishing ABA receptor function and downstream signaling\",\n      \"pmids\": [\"34098144\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"In H9c2 cardiomyoblasts under hypoxia/reoxygenation, LANCL1 (and LANCL2) overexpression increases phosphorylation of Akt, AMPK, and eNOS; stimulates NO production; increases glucose uptake and NADPH levels; and improves cell survival. Silencing LANCL1/2 has the opposite effects. L-NAME (NOS inhibitor) abrogates ABA/LANCL1-mediated protection, placing NO production downstream of LANCL1 in the hypoxia-protection pathway.\",\n      \"method\": \"Viral overexpression and siRNA silencing of LANCL1/2 in H9c2 cells, hypoxia/reoxygenation model, Western blot for Akt/AMPK/eNOS phosphorylation, NOS inhibitor (L-NAME), fluorescent glucose uptake assay, mitochondrial proton gradient measurement\",\n      \"journal\": \"Cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal gain/loss-of-function with pharmacological pathway dissection in a single lab\",\n      \"pmids\": [\"36139463\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"LanCL1 expression in spermatocytes is transcriptionally regulated by transcription factor SP1 in response to spermatogenic reactive oxygen species. LanCL1 deletion causes spermatozoal oxidative damage and impaired male fertility; LanCL1 transgene protects against high-fat-diet-induced oxidative damage and subfertility in mice.\",\n      \"method\": \"LanCL1 knockout and transgenic mouse models, semen analysis, histopathology, SP1 transcription factor analysis, ROS measurement\",\n      \"journal\": \"Lab animal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal genetic mouse models (KO and transgene) with defined phenotype and transcriptional regulator identification, single lab\",\n      \"pmids\": [\"35469022\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"LANCL1 functions as a cell surface protein in hepatocellular carcinoma cells and directly binds FAM49B as a downstream partner (identified by mass spectrometry). LANCL1 stabilizes FAM49B by blocking its interaction with E3 ubiquitin ligase TRIM21, preventing ubiquitin-proteasome degradation of FAM49B. The LANCL1-FAM49B axis suppresses Rac1-NADPH oxidase-driven ROS production independently of LANCL1's glutathione transferase function.\",\n      \"method\": \"siRNA library screen, immunofluorescence for membrane localization, limiting dilution assay in vivo, mass spectrometry (pulldown for FAM49B identification), Co-IP for LANCL1-FAM49B and FAM49B-TRIM21 interactions, ubiquitination assays, Rac1 activity assay, ROS measurement\",\n      \"journal\": \"Hepatology (Baltimore, Md.)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — MS-based binding partner identification validated by Co-IP, ubiquitination mechanism established, in vivo tumor initiation assay, multiple orthogonal methods in a single rigorous study\",\n      \"pmids\": [\"37540188\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"LANCL1/2 overexpression or silencing controls mitochondrial number, OXPHOS complex I, proton gradient, glucose and palmitate-dependent respiration, and expression of cytoskeletal/contractile/ion channel proteins in H9c2 cardiomyoblasts. These effects are mediated by transcription factor ERRα, which acts upstream of the AMPK/PGC-1α axis and is itself transcriptionally controlled by the ABA-LANCL1/2 system.\",\n      \"method\": \"Viral overexpression and siRNA silencing of LANCL1/2, mitochondrial function assays (Seahorse), Western blot, qPCR, ERRα transcription factor analysis in H9c2 cells\",\n      \"journal\": \"Antioxidants (Basel, Switzerland)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal gain/loss-of-function with identification of upstream transcription factor (ERRα) and downstream pathway, single lab\",\n      \"pmids\": [\"37759995\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Hypothalamic LanCL1 transcription is regulated by both PGC-1α and SP1 through direct interaction of these two factors. Under high-fat diet, short-term ROS exposure activates PGC-1α to elevate LanCL1 expression, while long-term exposure promotes ubiquitin-mediated PGC-1α degradation and suppresses LanCL1, establishing a PGC-1α-SP1-LanCL1 regulatory axis in hypothalamic antioxidant defense.\",\n      \"method\": \"Hypothalamic LanCL1 overexpression/knockout mouse models, high-fat diet model, Co-immunoprecipitation of PGC-1α and SP1, Western blot for ubiquitination and pathway components, qPCR\",\n      \"journal\": \"Antioxidants (Basel, Switzerland)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP establishing PGC-1α/SP1 direct interaction, reciprocal mouse genetic models with defined hypothalamic phenotype, single lab\",\n      \"pmids\": [\"38397850\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"LanCL1 overexpression in retinal ganglion cells (via intravitreal AAV2) promotes neuroprotection and axon regeneration after optic nerve crush injury in vivo; axons extend through the full optic nerve when combined with fibronectin-based recombinant small protein. However, LanCL1 transgene does NOT activate the mTOR pathway marker pS6 in injured RGCs (negative finding for mTOR mechanism).\",\n      \"method\": \"AAV2-mediated LanCL1 overexpression in mouse RGCs, optic nerve crush injury model, axon tracing, immunostaining for pS6 (mTOR marker), scRNA-seq characterization of Lancl1-3 expression in RGC subtypes\",\n      \"journal\": \"Experimental neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo gain-of-function with defined regeneration phenotype and explicit negative result for mTOR, single lab\",\n      \"pmids\": [\"42002019\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"LanCL1 is a critical mediator of neuropathic hypersensitivity. The novel peptide ligand LAT8881 binds LanCL1 in the spinal cord (confirmed by photoaffinity pulldown), suppresses ectopic firing at the DRG, reduces wind-up and spontaneous activity in dorsal horn neurons, and reverses mechanical allodynia in multiple rodent neuropathic models. siRNA knockdown of LanCL1 in DRG blocked LAT8881 activity. In neuropathic models, LanCL1 undergoes functional reorganization: reduced cytosolic expression in DRG neurons with increased expression in satellite glia.\",\n      \"method\": \"Photoaffinity conjugate pulldown of LanCL1 from spinal cord, siRNA knockdown in DRG, ex vivo spinal cord electrophysiology, in vivo electrophysiology (DRG ectopic firing, dorsal horn unit recording), behavioral allodynia testing in CCI and other rodent models, immunohistochemistry for LanCL1 localization\",\n      \"journal\": \"Pain\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — photoaffinity-based binding target identification validated by siRNA knockdown, multiple orthogonal electrophysiological and behavioral readouts, multiple neuropathic models\",\n      \"pmids\": [\"42263267\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"LANCL1-SIRT3-SOD2 axis: LANCL1 downregulation (in obstructive jaundice) inhibits SIRT3-mediated deacetylation of SOD2, impairing antioxidant capacity and increasing oxidative stress and hepatocyte apoptosis. LANCL1 overexpression restores SIRT3 expression and SOD2 deacetylation, attenuating liver injury.\",\n      \"method\": \"In vivo bile duct ligation model, in vitro BDL-serum-treated BRL-3A hepatocytes, LANCL1 overexpression, Western blot for SIRT3 and SOD2 deacetylation, ROS/MDA/SOD assays, H&E histology, proteomic serum analysis\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal in vivo and in vitro models with defined SIRT3/SOD2 deacetylation mechanism, single lab\",\n      \"pmids\": [\"42001717\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"LANCL1 is a cytoplasmic peripheral membrane protein that functions as both an abscisic acid receptor (binding ABA with µM affinity) and a neuronal antioxidant regulator: it catalyzes glutathione-dependent thioether formation, positively regulates redox-sensitive deubiquitinating enzymes (UCH/USP family), activates AKT and the AMPK/PGC-1α/Sirt1/ERRα signaling axis to stimulate glucose uptake, mitochondrial respiration, and NO production, suppresses ROS via the FAM49B-Rac1-NADPH oxidase axis (by protecting FAM49B from TRIM21-mediated ubiquitin-proteasome degradation), and promotes neuronal survival and axon regeneration; its transcription is regulated by SP1 and PGC-1α in response to oxidative stress signals, and it mediates neuropathic hypersensitivity through functional reorganization in DRG neurons and satellite glia.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"LANCL1 is a cytoplasmic peripheral membrane protein, related to the bacterial LanC family of peptide-modifying enzymes, that functions broadly as a neuronal antioxidant regulator and metabolic signaling hub [#0, #2]. Genetic deletion in mice causes ROS accumulation, oxidative damage to lipids, proteins and DNA, mitochondrial dysfunction, and apoptotic neurodegeneration, and purified LANCL1 catalyzes glutathione-dependent thioether formation, defining a neuron-specific glutathione defense activity [#2]. LANCL1 sustains cellular redox homeostasis through several convergent routes: it positively regulates redox-sensitive deubiquitinating enzymes (UCH/USP-family DUBs including A20/TNFAIP3, USP9X and USP10) in a manner reconstituted in vitro by recombinant LANCL1 plus GSH, even though it lacks classical glutathione-S-transferase activity in vivo [#6]; it activates AKT and the PGC-1\\u03b1/SIRT3 axis to drive SOD2 deacetylation and mitochondrial enzyme function [#4, #15]; and it stabilizes FAM49B by blocking TRIM21-mediated ubiquitin-proteasome degradation, thereby suppressing Rac1-NADPH oxidase-driven ROS independently of its glutathione-related activity [#10]. LANCL1 also binds abscisic acid with \\u00b5M affinity and acts as an ABA receptor that activates an AMPK/PGC-1\\u03b1/Sirt1/ERR\\u03b1 signaling axis to stimulate glucose uptake, mitochondrial respiration, and eNOS-dependent NO production in muscle and cardiac cells [#7, #8, #11]. In the nervous system these activities translate into neuroprotection: CNS-specific LANCL1 expression restores AKT activity and prolongs survival in ALS model mice [#5], LANCL1 promotes retinal ganglion cell survival and axon regeneration after optic nerve injury independently of mTOR signaling [#13], and LANCL1 mediates neuropathic hypersensitivity, serving as the spinal target of the analgesic peptide LAT8881 [#14]. Its own transcription is controlled by a PGC-1\\u03b1\\u2013SP1 regulatory axis responsive to oxidative stress [#9, #12].\",\n  \"teleology\": [\n    {\n      \"year\": 2000,\n      \"claim\": \"Established that LANCL1, despite the GPR69A designation, is not a seven-transmembrane GPCR but a peripheral cytoplasmic membrane protein related to bacterial LanC peptide-modifying enzymes, reframing the search for its molecular function.\",\n      \"evidence\": \"Peptide-antibody localization, sequence analysis, and subcellular fractionation of erythrocyte membranes\",\n      \"pmids\": [\"10944443\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No enzymatic substrate identified\", \"Family relationship suggests but does not demonstrate a catalytic activity\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Showed LANCL1 can be recruited to a pathogen-induced membrane structure via direct interaction with a parasite protein, the first physical partner identified.\",\n      \"evidence\": \"Co-immunoprecipitation and immunofluorescence in P. falciparum-infected erythrocytes (PfSBP1 interaction)\",\n      \"pmids\": [\"15811525\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No functional mutagenesis of the interaction\", \"Host-cell relevance to mammalian LANCL1 function unclear\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Defined LANCL1 as a neuron-specific antioxidant whose loss drives oxidative neurodegeneration, and assigned it a glutathione-dependent thioether-forming activity.\",\n      \"evidence\": \"LanCL1 knockout and transgene-rescue mice, in vitro enzymatic assay with purified protein, ROS and mitochondrial readouts\",\n      \"pmids\": [\"25158856\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Physiological thioether substrate not identified\", \"Relationship between catalytic activity and neuroprotection not resolved\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Connected LANCL1 antioxidant function to defined signaling outputs in disease contexts, linking it to JNK suppression in cancer and AKT-PGC-1\\u03b1-Sirt3 activation in neuronal ischemia.\",\n      \"evidence\": \"siRNA knockdown in prostate cancer cells and lentiviral overexpression in HT22 cells with OGD, pathway inhibitor dissection\",\n      \"pmids\": [\"29416001\", \"30075199\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No direct biochemical link between LANCL1 and these kinases\", \"Mechanism of pathway engagement unknown\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Demonstrated in vivo that LANCL1 is a positive regulator of AKT activity and that restoring it confers motor neuron protection in an ALS model, establishing therapeutic relevance.\",\n      \"evidence\": \"Reciprocal CNS-specific transgenic and conditional knockout SOD1G93A mice with AKT phosphorylation and survival readouts\",\n      \"pmids\": [\"31570855\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct mechanism by which LANCL1 activates AKT not defined\", \"Whether AKT activation is upstream or parallel to antioxidant function unclear\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Revised the enzymatic model: LANCL1 is not a functional GST in vivo but positively regulates redox-sensitive deubiquitinases, reconstituted by recombinant LANCL1 plus GSH.\",\n      \"evidence\": \"CRISPR knockout in HeLa, in vitro GST/UCH/DUB activity assays, recombinant protein plus GSH reconstitution, proteasome inhibition\",\n      \"pmids\": [\"33049334\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular mechanism by which LANCL1 protects DUBs not defined\", \"Direct DUB-LANCL1 binding not shown\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Identified LANCL1 as a \\u00b5M-affinity abscisic acid receptor coupling ABA to an AMPK/PGC-1\\u03b1/Sirt1 axis that stimulates glucose uptake and mitochondrial respiration.\",\n      \"evidence\": \"Radioligand binding, CD, SPR, NBDG glucose uptake, qPCR/Western, LANCL2-knockout mice, overexpression/silencing in L6 myoblasts\",\n      \"pmids\": [\"34098144\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of ABA binding not resolved\", \"Endogenous mammalian ABA source and physiological role uncertain\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Extended the ABA-LANCL1 axis to cardiac cells and placed NO production downstream, with ERR\\u03b1 identified as an upstream transcription factor controlling mitochondrial biogenesis.\",\n      \"evidence\": \"Reciprocal overexpression/silencing of LANCL1/2 in H9c2 cells, hypoxia/reoxygenation, L-NAME inhibition, Seahorse assays, ERR\\u03b1 analysis\",\n      \"pmids\": [\"36139463\", \"37759995\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs indirect control of ERR\\u03b1 not distinguished\", \"LANCL1 vs LANCL2 specific contributions not separated\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Established a transcriptional control loop: SP1 drives LANCL1 expression in response to oxidative stress, and LANCL1 is required for protection of spermatozoa against oxidative damage.\",\n      \"evidence\": \"LanCL1 knockout and transgenic mice, semen analysis, high-fat-diet model, SP1 transcription factor analysis\",\n      \"pmids\": [\"35469022\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct SP1 binding to the LanCL1 promoter not demonstrated in this finding\", \"Tissue specificity of SP1 regulation unclear\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Uncovered a glutathione-independent antioxidant mechanism: LANCL1 stabilizes FAM49B by blocking TRIM21-mediated degradation, suppressing Rac1-NADPH oxidase-driven ROS.\",\n      \"evidence\": \"siRNA screen, mass spectrometry partner identification, Co-IP, ubiquitination and Rac1 activity assays, in vivo tumor initiation in hepatocellular carcinoma\",\n      \"pmids\": [\"37540188\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Reported cell-surface localization conflicts with earlier cytoplasmic localization and is unexplained\", \"Structural basis of LANCL1-FAM49B binding unknown\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Defined a PGC-1\\u03b1\\u2013SP1 regulatory axis controlling LANCL1 transcription, with biphasic ROS responses determining whether LANCL1 is induced or suppressed.\",\n      \"evidence\": \"Hypothalamic LanCL1 overexpression/knockout mice, high-fat diet, Co-IP of PGC-1\\u03b1 and SP1, ubiquitination Western blots\",\n      \"pmids\": [\"38397850\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct promoter occupancy not mapped\", \"Generality of the biphasic switch across tissues untested\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Demonstrated LANCL1's roles in axon regeneration and neuropathic pain, including target validation of an analgesic peptide, while excluding mTOR as the regeneration mechanism.\",\n      \"evidence\": \"AAV2 LanCL1 overexpression in RGCs with optic nerve crush, pS6 immunostaining; photoaffinity pulldown of LanCL1 by LAT8881, DRG siRNA, spinal electrophysiology and behavioral allodynia in rodent models; LANCL1-SIRT3-SOD2 axis in bile duct ligation\",\n      \"pmids\": [\"42002019\", \"42263267\", \"42001717\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular pathway driving axon regeneration not identified given mTOR exclusion\", \"Mechanism of LANCL1 functional reorganization between neurons and glia unknown\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The unifying molecular activity linking LANCL1's glutathione-related catalysis, ABA receptor function, DUB/FAM49B protein stabilization, and kinase activation remains undefined.\",\n      \"evidence\": \"No single study reconciles the enzymatic, receptor, and scaffold/stabilizer activities into one biochemical mechanism\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No structural model integrating ABA binding and catalytic/scaffold functions\", \"Whether one activity is primary and others downstream is unresolved\", \"Endogenous physiological ligand(s) and substrate(s) unidentified\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [6, 10]},\n      {\"term_id\": \"GO:0140299\", \"supporting_discovery_ids\": [7]},\n      {\"term_id\": \"GO:0016740\", \"supporting_discovery_ids\": [2]},\n      {\"term_id\": \"GO:0140313\", \"supporting_discovery_ids\": [10]},\n      {\"term_id\": \"GO:0016209\", \"supporting_discovery_ids\": [2]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [0, 2]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [0, 10]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-8953897\", \"supporting_discovery_ids\": [2, 6]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [4, 5, 7]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [7, 11]},\n      {\"term_id\": \"R-HSA-112316\", \"supporting_discovery_ids\": [13, 14]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"FAM49B\", \"TRIM21\", \"PfSBP1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}