{"gene":"LAMP5","run_date":"2026-06-10T02:59:49","timeline":{"discoveries":[{"year":2007,"finding":"UNC-46 (LAMP5 ortholog in C. elegans) is a sorting factor required for localizing the vesicular GABA transporter (VGAT/UNC-47) to synaptic vesicles. In unc-46 mutants, the transporter is diffusely spread along the axon rather than concentrated at synaptic vesicles, severely reducing miniature current frequency without affecting amplitude. The vesicular GABA transporter recruits UNC-46 to synaptic vesicle precursors in the cell body, and UNC-46 in turn sorts the transporter at the cell body and during endocytosis at the synapse.","method":"Genetic mutant analysis in C. elegans, electrophysiology (miniature current recordings), fluorescence imaging of transporter localization","journal":"Nature neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean loss-of-function mutant with defined cellular phenotype (mislocalization), electrophysiological readout, and mutual sorting mechanism established; replicated across multiple behavioral and electrophysiological assays in one rigorous study","pmids":["17558401"],"is_preprint":false},{"year":2007,"finding":"BAD-LAMP (LAMP5) defines a novel early endocytic compartment in specific subtypes of cortical projection neurons. The protein is endocytosed but not found in classical lysosomal/endosomal compartments. Addition of GFP to BAD-LAMP revealed a cryptic lysosomal retention motif, suggesting the cytoplasmic tail is actively sorted away from lysosomes. In transfected HeLa cells, BAD-LAMP recycles to the plasma membrane through a dynamin/AP2-dependent mechanism.","method":"Subcellular fractionation, live-cell imaging, GFP-tagging, endocytosis assay in HeLa cells, immunofluorescence in primary neurons","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct localization experiments with functional consequence (cryptic retention motif, dynamin/AP2-dependent recycling) using multiple methods in one lab","pmids":["17215451"],"is_preprint":false},{"year":2011,"finding":"BAD-LAMP (LAMP5) is localized in the endoplasmic reticulum-Golgi intermediate compartment (ERGIC) of freshly isolated human plasmacytoid dendritic cells (pDCs) and is rapidly lost upon activation by CpG oligonucleotides (TLR9 ligand). Expression is restricted to neurons in mice but additionally present in human pDCs.","method":"Immunofluorescence, subcellular fractionation, flow cytometry of isolated pDCs","journal":"Blood","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct localization by immunofluorescence showing ERGIC compartment and stimulus-dependent loss; single lab, two orthogonal methods","pmids":["21642595"],"is_preprint":false},{"year":2016,"finding":"In the mouse brain, LAMP5 is expressed in subpopulations of GABAergic forebrain neurons and is present at synaptic terminals overlapping with the mammalian vesicular GABA transporter (VGAT). In LAMP5-deficient mice, VGAT localization is unaffected (no conserved role in VGAT trafficking), but electrophysiological analyses reveal alterations in short-term synaptic plasticity, indicating LAMP5 controls the dynamics of evoked GABAergic transmission. Behavioral deficits include decreased anxiety and impaired olfactory discrimination.","method":"LAMP5 knockout mouse, immunofluorescence, electrophysiology (short-term synaptic plasticity), behavioral assays","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean KO with defined electrophysiological phenotype (short-term plasticity), localization experiments, and behavioral readouts; negative result on VGAT trafficking also experimentally established","pmids":["27272053"],"is_preprint":false},{"year":2017,"finding":"BAD-LAMP (LAMP5) controls TLR9 trafficking to LAMP1+ late endosomes in human pDCs, leading to NF-κB activation and TNF production upon DNA sensing. An inducible VAMP3+/LAMP2+/LAMP1- endolysosomal compartment exists in pDCs from which TLR9 activation triggers type I interferon expression. BAD-LAMP silencing enhances TLR9 retention in this interferon-signaling compartment and amplifies downstream IFN signaling. Conversely, sustained BAD-LAMP expression promotes TLR9 sorting to late endosomes, limiting type I interferon production. TGF-β-positive microenvironments exploit this mechanism to suppress pDC IFN responses.","method":"siRNA silencing, immunofluorescence co-localization, endosomal fractionation, cytokine measurements (ELISA/FACS), TLR9 trafficking assays in primary human pDCs","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal gain/loss-of-function experiments with defined subcellular trafficking phenotype and downstream signaling readouts; multiple orthogonal methods in one rigorous study","pmids":["29030552"],"is_preprint":false},{"year":2019,"finding":"LAMP5 functions as a novel autophagic suppressor in MLL leukemia cells, protecting MLL fusion oncoproteins from autophagic degradation. LAMP5 is a direct transcriptional target of the H3K79 histone methyltransferase DOT1L. Knockdown of LAMP5 promotes selective autophagic degradation of MLL fusion proteins and inhibits leukemia progression in animal models and primary cells.","method":"shRNA knockdown, in vitro and in vivo leukemia models, autophagy assays (LC3, autophagic flux), ChIP (DOT1L/H3K79me2 at LAMP5 locus), western blotting, xenograft mouse models","journal":"Clinical cancer research","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (ChIP, autophagy assays, in vivo mouse models, primary cells) in one study establishing mechanism; direct DOT1L-LAMP5 transcriptional regulation and autophagic suppressor role","pmids":["30651276"],"is_preprint":false},{"year":2019,"finding":"In the mouse brainstem and spinal cord, LAMP5 is localized exclusively in inhibitory synaptic terminals. In LAMP5 knockout mice, VIAAT localization is unaltered in the lateral superior olive and ventral cochlear nuclei (no conserved role in VIAAT trafficking). LAMP5 deficiency causes increased startle response and larger auditory brainstem response wave amplitudes, indicating LAMP5 plays a role in sensorimotor processing.","method":"LAMP5 knockout mouse, immunofluorescence, auditory brainstem response (ABR) recording, startle response behavioral assay","journal":"Molecular brain","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean KO with defined electrophysiological (ABR) and behavioral phenotypes; negative result on VIAAT trafficking explicitly established; replicates localization finding from prior study","pmids":["30867010"],"is_preprint":false},{"year":2022,"finding":"LAMP5 is a direct target of MLL-fusion oncoproteins. In MLL-rearranged leukemia cells, LAMP5 modulates innate immune signaling by transferring signal flux from interferon-signaling endosomes to pro-inflammatory signaling endosomes. LAMP5 depletion inhibits NF-κB signaling, increases type I interferon signaling downstream of TLR/IL-1R activation, and suppresses leukemia cell growth in vitro and in vivo. IRF7 depletion partially rescues growth inhibition caused by LAMP5 knockdown (epistasis). LAMP5 is also detectable on the leukemia cell surface.","method":"shRNA knockdown, in vitro and in vivo leukemia models, NF-κB and IFN signaling reporter/western blot assays, epistasis experiment (IRF7 depletion rescue), surface protein detection, antibody-drug conjugate treatment","journal":"Haematologica","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods including epistasis (IRF7 rescue), in vivo models, signaling pathway assays, and surface localization; consistent with prior mechanistic findings on LAMP5/TLR endosomal sorting","pmids":["33910331"],"is_preprint":false},{"year":2023,"finding":"LAMP5 interacts with ANXA7 (an annexin with Ca2+-dependent GTPase activity) in neurons. ANXA7 activation stabilizes LAMP5 protein expression. Asp411 mutation of ANXA7 impairs its interaction with LAMP5. Overexpression of LAMP5 attenuates lysosomal acidification impairment, autophagy inhibition, and apoptosis caused by ANXA7 downregulation after oxygen-glucose deprivation/reperfusion (OGD/R). Together, ANXA7 and LAMP5 regulate autophagy and apoptosis via the mTOR/TFEB pathway.","method":"Co-immunoprecipitation, site-directed mutagenesis (Asp411), overexpression/knockdown in neuronal cells, autophagy/apoptosis assays, lysosomal acidification assay, mTOR/TFEB pathway western blot","journal":"Cell death discovery","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with mutagenesis validation plus functional rescue experiment; single lab, two orthogonal methods","pmids":["37620352"],"is_preprint":false},{"year":2023,"finding":"LAMP5 silencing in multiple myeloma cell lines promotes apoptosis. Mechanistically, LAMP5 may exert pro-tumor effects partly through activation of p38 protein, as assessed by western blotting after LAMP5 knockdown.","method":"siRNA knockdown, flow cytometry (apoptosis), western blotting (p38 activation)","journal":"Pathology oncology research : POR","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, single indirect method (western blot for p38 activation); no direct mechanistic link between LAMP5 and p38 established","pmids":["37033323"],"is_preprint":false},{"year":2024,"finding":"LAMP5-AS1 lncRNA recruits DOT1L to the LAMP5 locus to directly activate LAMP5 transcription. Knocking down LAMP5-AS1 enhances autophagic degradation of MLL fusion proteins and inhibits MLL leukemia cell survival in vitro and in vivo. This identifies a lncRNA-DOT1L-LAMP5 regulatory axis.","method":"ChIRP, RNA pull-down, ChIP, RNA FISH, LC3B puncta/TEM autophagy assays, mRFP-GFP-LC3 autophagic flux, in vivo mouse survival","journal":"Experimental hematology & oncology","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (ChIRP, ChIP, RNA pull-down, imaging-based autophagy assays, in vivo) establishing the lncRNA-DOT1L-LAMP5 transcriptional axis and downstream autophagy mechanism","pmids":["38374003"],"is_preprint":false},{"year":2025,"finding":"LAMP5 interacts with IRF4 and prevents its degradation through the autophagy-lysosome pathway in multiple myeloma. LAMP5 also enhances the interaction between IRF4 and the nuclear transport protein KPNA2, facilitating IRF4 nuclear transport and preventing its cytoplasmic retention and subsequent autophagic degradation. Nuclear IRF4 promotes c-MYC transcription, and c-MYC positively feeds back to activate LAMP5 transcription, forming a regulatory loop. High-throughput drug screening identified pyrazofurin as a compound that disrupts the LAMP5-IRF4 interaction, leading to IRF4 degradation.","method":"Co-immunoprecipitation, autophagy-lysosome pathway inhibition assays, nuclear/cytoplasmic fractionation, western blotting, ChIP, high-throughput drug screening, in vitro and in vivo myeloma models","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 / Strong — Co-IP establishing LAMP5-IRF4 and IRF4-KPNA2 interactions, fractionation showing nuclear transport, pathway assays, drug validation; multiple orthogonal methods in one study","pmids":["40721659"],"is_preprint":false},{"year":2024,"finding":"LAMP5 facilitates bladder cancer cell proliferation via regulation of the FBXW11/p27 axis, as determined by in vitro knockdown experiments.","method":"siRNA knockdown, proliferation assays, western blotting (FBXW11, p27)","journal":"Apoptosis : an international journal on programmed cell death","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, single knockdown approach with western blot readout; mechanism not fully resolved beyond association","pmids":["41663867"],"is_preprint":false}],"current_model":"LAMP5 is a lysosomal/endosomal membrane protein that functions primarily as an endosomal sorting and trafficking regulator: in neurons (and its C. elegans ortholog UNC-46), it sorts the vesicular GABA transporter to synaptic vesicles and fine-tunes GABAergic synaptic transmission; in immune cells (pDCs and MLL-rearranged leukemia cells), it controls TLR9 endosomal trafficking and the balance between pro-inflammatory (NF-κB) and antiviral (type I IFN) signaling; in cancer contexts it suppresses autophagy to protect oncoproteins (MLL fusions, IRF4) from lysosomal degradation, with its expression driven by DOT1L-mediated H3K79 methylation at its locus, and it additionally stabilizes IRF4 nuclear transport via KPNA2 to sustain a c-MYC/LAMP5 feed-forward loop in myeloma."},"narrative":{"mechanistic_narrative":"LAMP5 (BAD-LAMP) is an endolysosomal membrane protein that operates as an endosomal sorting and trafficking regulator across neuronal and immune contexts [PMID:17215451, PMID:29030552]. Unlike conventional LAMP family members, it is actively sorted away from lysosomes via a cryptic retention motif in its cytoplasmic tail and recycles to the plasma membrane through a dynamin/AP2-dependent route, defining a distinct early endocytic compartment [PMID:17215451]. In neurons it concentrates at inhibitory synaptic terminals overlapping the vesicular GABA transporter, and its C. elegans ortholog UNC-46 sorts the vesicular GABA transporter to synaptic vesicles [PMID:17558401]; in mammalian knockouts the transporter localizes normally, but LAMP5 tunes the dynamics of evoked GABAergic transmission and short-term plasticity, with behavioral and sensorimotor consequences [PMID:27272053, PMID:30867010]. In human plasmacytoid dendritic cells LAMP5 resides in the ERGIC and governs TLR9 trafficking, routing the receptor toward LAMP1+ late endosomes to favor NF-κB/TNF signaling while limiting its retention in an interferon-signaling endosomal compartment, thereby setting the balance between pro-inflammatory and type I interferon output [PMID:21642595, PMID:29030552]. This trafficking control is co-opted in MLL-rearranged leukemia, where LAMP5—a direct target of MLL fusions and of DOT1L-mediated H3K79 methylation driven by the LAMP5-AS1 lncRNA—shifts innate immune signal flux from interferon to pro-inflammatory endosomes and suppresses autophagy to protect MLL fusion oncoproteins from lysosomal degradation [PMID:30651276, PMID:33910331, PMID:38374003]. In multiple myeloma LAMP5 stabilizes IRF4 by blocking its autophagy-lysosome degradation and by promoting KPNA2-dependent nuclear import, sustaining a c-MYC/LAMP5 feed-forward loop [PMID:40721659].","teleology":[{"year":2007,"claim":"Established the founding molecular function of the LAMP5 family: the C. elegans ortholog UNC-46 acts as a sorting factor that concentrates the vesicular GABA transporter on synaptic vesicles, defining a reciprocal sorting relationship at the synapse.","evidence":"Loss-of-function mutant analysis with miniature current electrophysiology and transporter localization imaging in C. elegans","pmids":["17558401"],"confidence":"High","gaps":["Whether the sorting mechanism is conserved in mammals was not tested here","Structural basis of transporter recognition unresolved"]},{"year":2007,"claim":"Showed that mammalian LAMP5 is atypical among LAMP proteins, defining a novel early endocytic compartment and being actively sorted away from lysosomes via a cryptic cytoplasmic retention motif while recycling to the plasma membrane.","evidence":"Subcellular fractionation, GFP-tagging, and dynamin/AP2-dependent endocytosis assays in HeLa cells with neuronal immunofluorescence","pmids":["17215451"],"confidence":"Medium","gaps":["Identity of the sorting machinery reading the cytoplasmic tail not defined","Physiological cargo of this compartment in neurons not established"]},{"year":2011,"claim":"Extended LAMP5 expression beyond neurons to human plasmacytoid dendritic cells, localizing it to the ERGIC and linking it to TLR9-pathway activation.","evidence":"Immunofluorescence, subcellular fractionation, and flow cytometry of isolated human pDCs","pmids":["21642595"],"confidence":"Medium","gaps":["Functional consequence of activation-induced loss not yet defined at this stage","Species difference (neuron-restricted in mouse) mechanism unexplained"]},{"year":2016,"claim":"Tested conservation of the worm sorting role in mammals: LAMP5 knockout did not perturb VGAT localization but altered short-term GABAergic plasticity, redefining its mammalian role as a modulator of inhibitory transmission dynamics rather than transporter sorting.","evidence":"LAMP5 knockout mouse with immunofluorescence, short-term plasticity electrophysiology, and behavioral assays","pmids":["27272053"],"confidence":"High","gaps":["Molecular mechanism controlling release dynamics not identified","Synaptic partners mediating the plasticity effect unknown"]},{"year":2017,"claim":"Defined the mechanistic immune function: LAMP5 routes TLR9 between functionally distinct endosomes to set the NF-κB versus type I interferon balance in pDCs, with reciprocal gain/loss-of-function controlling signal output.","evidence":"siRNA silencing, co-localization, endosomal fractionation, and cytokine assays in primary human pDCs","pmids":["29030552"],"confidence":"High","gaps":["Direct molecular interactions sorting TLR9 not mapped","How TGF-β microenvironment regulates LAMP5 expression unresolved"]},{"year":2019,"claim":"Connected LAMP5 to oncogenic transcriptional regulation and autophagy, showing it is a DOT1L/H3K79me transcriptional target that suppresses autophagy to protect MLL fusion oncoproteins from degradation.","evidence":"shRNA knockdown, ChIP, autophagic flux assays, and in vivo leukemia models","pmids":["30651276"],"confidence":"High","gaps":["Molecular mechanism by which LAMP5 suppresses autophagy not defined","Direct binding partners mediating oncoprotein protection unknown"]},{"year":2019,"claim":"Confirmed the mammalian neuronal role in a second circuit, again decoupling LAMP5 from inhibitory transporter trafficking while implicating it in sensorimotor processing.","evidence":"LAMP5 knockout mouse with immunofluorescence, auditory brainstem response recording, and startle assays","pmids":["30867010"],"confidence":"High","gaps":["Mechanism linking LAMP5 to startle and ABR phenotypes not established","Whether endosomal trafficking underlies the synaptic effect untested"]},{"year":2022,"claim":"Unified the immune-trafficking and oncogenic roles by showing LAMP5 is a direct MLL-fusion target that diverts innate immune signal flux from interferon to pro-inflammatory endosomes to drive leukemia growth, with IRF7 epistasis defining the interferon arm.","evidence":"shRNA knockdown, NF-κB/IFN signaling assays, IRF7-depletion epistasis, surface detection, and in vivo leukemia models","pmids":["33910331"],"confidence":"High","gaps":["Direct molecular interactions controlling endosomal signal partitioning not mapped","Mechanism of cell-surface presentation unexplained"]},{"year":2023,"claim":"Identified ANXA7 as a LAMP5-stabilizing partner in neurons, linking the interaction to lysosomal acidification, autophagy, and apoptosis control through the mTOR/TFEB pathway under ischemic stress.","evidence":"Co-immunoprecipitation, Asp411 site-directed mutagenesis, and functional rescue assays in neuronal cells under OGD/R","pmids":["37620352"],"confidence":"Medium","gaps":["Single-lab Co-IP without reciprocal in vivo validation","Whether ANXA7-LAMP5 axis operates outside ischemic stress unknown"]},{"year":2023,"claim":"Provided initial evidence that LAMP5 has pro-survival activity in multiple myeloma, possibly via p38 activation.","evidence":"siRNA knockdown with apoptosis flow cytometry and p38 western blotting","pmids":["37033323"],"confidence":"Low","gaps":["No direct mechanistic link between LAMP5 and p38 established","Single indirect readout without rescue"]},{"year":2024,"claim":"Resolved the upstream control of LAMP5 transcription in leukemia, showing the LAMP5-AS1 lncRNA recruits DOT1L to the locus to activate LAMP5 and sustain autophagy suppression of MLL fusion proteins.","evidence":"ChIRP, RNA pull-down, ChIP, RNA FISH, autophagy flux imaging, and in vivo survival models","pmids":["38374003"],"confidence":"High","gaps":["How LAMP5-AS1 is itself regulated not addressed","Generality of the lncRNA axis beyond MLL leukemia untested"]},{"year":2024,"claim":"Implicated LAMP5 in bladder cancer proliferation through the FBXW11/p27 axis.","evidence":"siRNA knockdown, proliferation assays, and FBXW11/p27 western blotting","pmids":["41663867"],"confidence":"Low","gaps":["Single knockdown approach with association-level readout","Direct molecular link to the FBXW11/p27 axis not demonstrated"]},{"year":2025,"claim":"Defined a myeloma feed-forward loop in which LAMP5 stabilizes IRF4 both by blocking its autophagic degradation and by enhancing KPNA2-dependent nuclear import, with nuclear IRF4 driving c-MYC, which in turn reactivates LAMP5.","evidence":"Co-IP, nuclear/cytoplasmic fractionation, ChIP, pathway-inhibition assays, drug screening (pyrazofurin), and in vivo myeloma models","pmids":["40721659"],"confidence":"High","gaps":["Structural basis of the LAMP5-IRF4 interaction not resolved","Whether the IRF4-stabilizing mechanism extends to other cancers untested"]},{"year":null,"claim":"It remains unknown how LAMP5's atypical endosomal sorting biochemistry mechanistically unifies its neuronal synaptic role, its TLR9/innate-immune partitioning, and its autophagy-suppressing oncogenic functions.","evidence":"No single study connects the shared trafficking activity to the divergent cell-type phenotypes","pmids":[],"confidence":"Low","gaps":["No structural model of LAMP5 or its sorting determinants","Direct molecular machinery partitioning cargo between endosomes unmapped","Whether a common biochemical activity underlies neuronal, immune, and cancer roles unresolved"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[0,4]}],"localization":[{"term_id":"GO:0005768","term_label":"endosome","supporting_discovery_ids":[1,4]},{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[2]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[1,7]},{"term_id":"GO:0005764","term_label":"lysosome","supporting_discovery_ids":[4,8]}],"pathway":[{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[1,4]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[4,7]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[5,10,11]},{"term_id":"R-HSA-112316","term_label":"Neuronal System","supporting_discovery_ids":[0,3,6]}],"complexes":[],"partners":["VGAT","TLR9","ANXA7","IRF4","KPNA2"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q9UJQ1","full_name":"Lysosome-associated membrane glycoprotein 5","aliases":["Brain and dendritic cell-associated LAMP","Brain-associated LAMP-like protein","BAD-LAMP","Lysosome-associated membrane protein 5","LAMP-5"],"length_aa":280,"mass_kda":31.5,"function":"Plays a role in short-term synaptic plasticity in a subset of GABAergic neurons in the brain","subcellular_location":"Cell membrane; Cytoplasmic vesicle, secretory vesicle, synaptic vesicle membrane; Endoplasmic reticulum-Golgi intermediate compartment membrane; Endosome membrane; Cytoplasmic vesicle membrane; Cell projection, dendrite; Cell projection, growth cone membrane; Early endosome membrane; Recycling endosome","url":"https://www.uniprot.org/uniprotkb/Q9UJQ1/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/LAMP5","classification":"Not Classified","n_dependent_lines":0,"n_total_lines":1208,"dependency_fraction":0.0},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/LAMP5","total_profiled":1310},"omim":[{"mim_id":"614641","title":"LYSOSOME-ASSOCIATED MEMBRANE PROTEIN 5; LAMP5","url":"https://www.omim.org/entry/614641"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Uncertain","locations":[{"location":"Cytosol","reliability":"Uncertain"},{"location":"Mitotic spindle","reliability":"Additional"},{"location":"Centriolar satellite","reliability":"Additional"}],"tissue_specificity":"Tissue enriched","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":297.8}],"url":"https://www.proteinatlas.org/search/LAMP5"},"hgnc":{"alias_symbol":["dJ1119D9.3","BAD-LAMP","UNC-46"],"prev_symbol":["C20orf103"]},"alphafold":{"accession":"Q9UJQ1","domains":[{"cath_id":"2.40.160.110","chopping":"31-224","consensus_level":"high","plddt":91.7886,"start":31,"end":224},{"cath_id":"1.20.5","chopping":"226-260","consensus_level":"medium","plddt":93.6057,"start":226,"end":260}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9UJQ1","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9UJQ1-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9UJQ1-F1-predicted_aligned_error_v6.png","plddt_mean":86.56},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=LAMP5","jax_strain_url":"https://www.jax.org/strain/search?query=LAMP5"},"sequence":{"accession":"Q9UJQ1","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9UJQ1.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9UJQ1/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9UJQ1"}},"corpus_meta":[{"pmid":"29030552","id":"PMC_29030552","title":"BAD-LAMP controls TLR9 trafficking and signalling in human plasmacytoid dendritic cells.","date":"2017","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/29030552","citation_count":65,"is_preprint":false},{"pmid":"32552847","id":"PMC_32552847","title":"The lncRNA LAMP5-AS1 drives leukemia cell stemness by directly modulating DOT1L methyltransferase activity in MLL leukemia.","date":"2020","source":"Journal of hematology & oncology","url":"https://pubmed.ncbi.nlm.nih.gov/32552847","citation_count":60,"is_preprint":false},{"pmid":"30651276","id":"PMC_30651276","title":"Activation of the Lysosome-Associated Membrane Protein LAMP5 by DOT1L Serves as a Bodyguard for MLL Fusion Oncoproteins to Evade Degradation in Leukemia.","date":"2019","source":"Clinical cancer research : an official journal of the American Association for Cancer Research","url":"https://pubmed.ncbi.nlm.nih.gov/30651276","citation_count":43,"is_preprint":false},{"pmid":"27272053","id":"PMC_27272053","title":"LAMP5 Fine-Tunes GABAergic Synaptic Transmission in Defined Circuits of the Mouse Brain.","date":"2016","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/27272053","citation_count":40,"is_preprint":false},{"pmid":"17558401","id":"PMC_17558401","title":"UNC-46 is required for trafficking of the vesicular GABA transporter.","date":"2007","source":"Nature neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/17558401","citation_count":38,"is_preprint":false},{"pmid":"21642595","id":"PMC_21642595","title":"BAD-LAMP is a novel biomarker of nonactivated human plasmacytoid dendritic cells.","date":"2011","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/21642595","citation_count":32,"is_preprint":false},{"pmid":"17215451","id":"PMC_17215451","title":"BAD-LAMP defines a subset of early endocytic organelles in subpopulations of cortical projection neurons.","date":"2007","source":"Journal of cell science","url":"https://pubmed.ncbi.nlm.nih.gov/17215451","citation_count":25,"is_preprint":false},{"pmid":"30867010","id":"PMC_30867010","title":"LAMP5 in presynaptic inhibitory terminals in the hindbrain and spinal cord: a role in startle response and auditory processing.","date":"2019","source":"Molecular brain","url":"https://pubmed.ncbi.nlm.nih.gov/30867010","citation_count":17,"is_preprint":false},{"pmid":"37620352","id":"PMC_37620352","title":"Targeting ANXA7/LAMP5-mTOR axis attenuates spinal cord injury by inhibiting neuronal apoptosis via enhancing autophagy in mice.","date":"2023","source":"Cell death discovery","url":"https://pubmed.ncbi.nlm.nih.gov/37620352","citation_count":17,"is_preprint":false},{"pmid":"33910331","id":"PMC_33910331","title":"LAMP-5 is an essential inflammatory-signaling regulator and novel immunotherapy target for mixed lineage leukemia-rearranged acute leukemia.","date":"2022","source":"Haematologica","url":"https://pubmed.ncbi.nlm.nih.gov/33910331","citation_count":15,"is_preprint":false},{"pmid":"37033323","id":"PMC_37033323","title":"LAMP5 may promote MM progression by activating p38.","date":"2023","source":"Pathology oncology research : POR","url":"https://pubmed.ncbi.nlm.nih.gov/37033323","citation_count":6,"is_preprint":false},{"pmid":"40721659","id":"PMC_40721659","title":"LAMP5 modulates IRF4 stability and nuclear transport: a critical mechanism in myeloma progression and therapy.","date":"2025","source":"Oncogene","url":"https://pubmed.ncbi.nlm.nih.gov/40721659","citation_count":3,"is_preprint":false},{"pmid":"38374003","id":"PMC_38374003","title":"Blockade of the lncRNA-DOT1L-LAMP5 axis enhances autophagy and promotes degradation of MLL fusion proteins.","date":"2024","source":"Experimental hematology & 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Performance","date":"2024-10-06","source":"bioRxiv","url":"https://doi.org/10.1101/2024.10.06.616839","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":11797,"output_tokens":3989,"usd":0.047613,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":11851,"output_tokens":4463,"usd":0.085415,"stage2_stop_reason":"end_turn"},"total_usd":0.133028,"stage1_batch_id":"msgbatch_01BbTCMyrRPyhtEq6b1MdwCN","stage2_batch_id":"msgbatch_011dEed5bbxYvTAaQWKJevxu","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2007,\n      \"finding\": \"UNC-46 (LAMP5 ortholog in C. elegans) is a sorting factor required for localizing the vesicular GABA transporter (VGAT/UNC-47) to synaptic vesicles. In unc-46 mutants, the transporter is diffusely spread along the axon rather than concentrated at synaptic vesicles, severely reducing miniature current frequency without affecting amplitude. The vesicular GABA transporter recruits UNC-46 to synaptic vesicle precursors in the cell body, and UNC-46 in turn sorts the transporter at the cell body and during endocytosis at the synapse.\",\n      \"method\": \"Genetic mutant analysis in C. elegans, electrophysiology (miniature current recordings), fluorescence imaging of transporter localization\",\n      \"journal\": \"Nature neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean loss-of-function mutant with defined cellular phenotype (mislocalization), electrophysiological readout, and mutual sorting mechanism established; replicated across multiple behavioral and electrophysiological assays in one rigorous study\",\n      \"pmids\": [\"17558401\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"BAD-LAMP (LAMP5) defines a novel early endocytic compartment in specific subtypes of cortical projection neurons. The protein is endocytosed but not found in classical lysosomal/endosomal compartments. Addition of GFP to BAD-LAMP revealed a cryptic lysosomal retention motif, suggesting the cytoplasmic tail is actively sorted away from lysosomes. In transfected HeLa cells, BAD-LAMP recycles to the plasma membrane through a dynamin/AP2-dependent mechanism.\",\n      \"method\": \"Subcellular fractionation, live-cell imaging, GFP-tagging, endocytosis assay in HeLa cells, immunofluorescence in primary neurons\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct localization experiments with functional consequence (cryptic retention motif, dynamin/AP2-dependent recycling) using multiple methods in one lab\",\n      \"pmids\": [\"17215451\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"BAD-LAMP (LAMP5) is localized in the endoplasmic reticulum-Golgi intermediate compartment (ERGIC) of freshly isolated human plasmacytoid dendritic cells (pDCs) and is rapidly lost upon activation by CpG oligonucleotides (TLR9 ligand). Expression is restricted to neurons in mice but additionally present in human pDCs.\",\n      \"method\": \"Immunofluorescence, subcellular fractionation, flow cytometry of isolated pDCs\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct localization by immunofluorescence showing ERGIC compartment and stimulus-dependent loss; single lab, two orthogonal methods\",\n      \"pmids\": [\"21642595\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"In the mouse brain, LAMP5 is expressed in subpopulations of GABAergic forebrain neurons and is present at synaptic terminals overlapping with the mammalian vesicular GABA transporter (VGAT). In LAMP5-deficient mice, VGAT localization is unaffected (no conserved role in VGAT trafficking), but electrophysiological analyses reveal alterations in short-term synaptic plasticity, indicating LAMP5 controls the dynamics of evoked GABAergic transmission. Behavioral deficits include decreased anxiety and impaired olfactory discrimination.\",\n      \"method\": \"LAMP5 knockout mouse, immunofluorescence, electrophysiology (short-term synaptic plasticity), behavioral assays\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean KO with defined electrophysiological phenotype (short-term plasticity), localization experiments, and behavioral readouts; negative result on VGAT trafficking also experimentally established\",\n      \"pmids\": [\"27272053\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"BAD-LAMP (LAMP5) controls TLR9 trafficking to LAMP1+ late endosomes in human pDCs, leading to NF-κB activation and TNF production upon DNA sensing. An inducible VAMP3+/LAMP2+/LAMP1- endolysosomal compartment exists in pDCs from which TLR9 activation triggers type I interferon expression. BAD-LAMP silencing enhances TLR9 retention in this interferon-signaling compartment and amplifies downstream IFN signaling. Conversely, sustained BAD-LAMP expression promotes TLR9 sorting to late endosomes, limiting type I interferon production. TGF-β-positive microenvironments exploit this mechanism to suppress pDC IFN responses.\",\n      \"method\": \"siRNA silencing, immunofluorescence co-localization, endosomal fractionation, cytokine measurements (ELISA/FACS), TLR9 trafficking assays in primary human pDCs\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal gain/loss-of-function experiments with defined subcellular trafficking phenotype and downstream signaling readouts; multiple orthogonal methods in one rigorous study\",\n      \"pmids\": [\"29030552\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"LAMP5 functions as a novel autophagic suppressor in MLL leukemia cells, protecting MLL fusion oncoproteins from autophagic degradation. LAMP5 is a direct transcriptional target of the H3K79 histone methyltransferase DOT1L. Knockdown of LAMP5 promotes selective autophagic degradation of MLL fusion proteins and inhibits leukemia progression in animal models and primary cells.\",\n      \"method\": \"shRNA knockdown, in vitro and in vivo leukemia models, autophagy assays (LC3, autophagic flux), ChIP (DOT1L/H3K79me2 at LAMP5 locus), western blotting, xenograft mouse models\",\n      \"journal\": \"Clinical cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (ChIP, autophagy assays, in vivo mouse models, primary cells) in one study establishing mechanism; direct DOT1L-LAMP5 transcriptional regulation and autophagic suppressor role\",\n      \"pmids\": [\"30651276\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"In the mouse brainstem and spinal cord, LAMP5 is localized exclusively in inhibitory synaptic terminals. In LAMP5 knockout mice, VIAAT localization is unaltered in the lateral superior olive and ventral cochlear nuclei (no conserved role in VIAAT trafficking). LAMP5 deficiency causes increased startle response and larger auditory brainstem response wave amplitudes, indicating LAMP5 plays a role in sensorimotor processing.\",\n      \"method\": \"LAMP5 knockout mouse, immunofluorescence, auditory brainstem response (ABR) recording, startle response behavioral assay\",\n      \"journal\": \"Molecular brain\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean KO with defined electrophysiological (ABR) and behavioral phenotypes; negative result on VIAAT trafficking explicitly established; replicates localization finding from prior study\",\n      \"pmids\": [\"30867010\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"LAMP5 is a direct target of MLL-fusion oncoproteins. In MLL-rearranged leukemia cells, LAMP5 modulates innate immune signaling by transferring signal flux from interferon-signaling endosomes to pro-inflammatory signaling endosomes. LAMP5 depletion inhibits NF-κB signaling, increases type I interferon signaling downstream of TLR/IL-1R activation, and suppresses leukemia cell growth in vitro and in vivo. IRF7 depletion partially rescues growth inhibition caused by LAMP5 knockdown (epistasis). LAMP5 is also detectable on the leukemia cell surface.\",\n      \"method\": \"shRNA knockdown, in vitro and in vivo leukemia models, NF-κB and IFN signaling reporter/western blot assays, epistasis experiment (IRF7 depletion rescue), surface protein detection, antibody-drug conjugate treatment\",\n      \"journal\": \"Haematologica\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods including epistasis (IRF7 rescue), in vivo models, signaling pathway assays, and surface localization; consistent with prior mechanistic findings on LAMP5/TLR endosomal sorting\",\n      \"pmids\": [\"33910331\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"LAMP5 interacts with ANXA7 (an annexin with Ca2+-dependent GTPase activity) in neurons. ANXA7 activation stabilizes LAMP5 protein expression. Asp411 mutation of ANXA7 impairs its interaction with LAMP5. Overexpression of LAMP5 attenuates lysosomal acidification impairment, autophagy inhibition, and apoptosis caused by ANXA7 downregulation after oxygen-glucose deprivation/reperfusion (OGD/R). Together, ANXA7 and LAMP5 regulate autophagy and apoptosis via the mTOR/TFEB pathway.\",\n      \"method\": \"Co-immunoprecipitation, site-directed mutagenesis (Asp411), overexpression/knockdown in neuronal cells, autophagy/apoptosis assays, lysosomal acidification assay, mTOR/TFEB pathway western blot\",\n      \"journal\": \"Cell death discovery\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with mutagenesis validation plus functional rescue experiment; single lab, two orthogonal methods\",\n      \"pmids\": [\"37620352\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"LAMP5 silencing in multiple myeloma cell lines promotes apoptosis. Mechanistically, LAMP5 may exert pro-tumor effects partly through activation of p38 protein, as assessed by western blotting after LAMP5 knockdown.\",\n      \"method\": \"siRNA knockdown, flow cytometry (apoptosis), western blotting (p38 activation)\",\n      \"journal\": \"Pathology oncology research : POR\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, single indirect method (western blot for p38 activation); no direct mechanistic link between LAMP5 and p38 established\",\n      \"pmids\": [\"37033323\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"LAMP5-AS1 lncRNA recruits DOT1L to the LAMP5 locus to directly activate LAMP5 transcription. Knocking down LAMP5-AS1 enhances autophagic degradation of MLL fusion proteins and inhibits MLL leukemia cell survival in vitro and in vivo. This identifies a lncRNA-DOT1L-LAMP5 regulatory axis.\",\n      \"method\": \"ChIRP, RNA pull-down, ChIP, RNA FISH, LC3B puncta/TEM autophagy assays, mRFP-GFP-LC3 autophagic flux, in vivo mouse survival\",\n      \"journal\": \"Experimental hematology & oncology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (ChIRP, ChIP, RNA pull-down, imaging-based autophagy assays, in vivo) establishing the lncRNA-DOT1L-LAMP5 transcriptional axis and downstream autophagy mechanism\",\n      \"pmids\": [\"38374003\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"LAMP5 interacts with IRF4 and prevents its degradation through the autophagy-lysosome pathway in multiple myeloma. LAMP5 also enhances the interaction between IRF4 and the nuclear transport protein KPNA2, facilitating IRF4 nuclear transport and preventing its cytoplasmic retention and subsequent autophagic degradation. Nuclear IRF4 promotes c-MYC transcription, and c-MYC positively feeds back to activate LAMP5 transcription, forming a regulatory loop. High-throughput drug screening identified pyrazofurin as a compound that disrupts the LAMP5-IRF4 interaction, leading to IRF4 degradation.\",\n      \"method\": \"Co-immunoprecipitation, autophagy-lysosome pathway inhibition assays, nuclear/cytoplasmic fractionation, western blotting, ChIP, high-throughput drug screening, in vitro and in vivo myeloma models\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — Co-IP establishing LAMP5-IRF4 and IRF4-KPNA2 interactions, fractionation showing nuclear transport, pathway assays, drug validation; multiple orthogonal methods in one study\",\n      \"pmids\": [\"40721659\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"LAMP5 facilitates bladder cancer cell proliferation via regulation of the FBXW11/p27 axis, as determined by in vitro knockdown experiments.\",\n      \"method\": \"siRNA knockdown, proliferation assays, western blotting (FBXW11, p27)\",\n      \"journal\": \"Apoptosis : an international journal on programmed cell death\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, single knockdown approach with western blot readout; mechanism not fully resolved beyond association\",\n      \"pmids\": [\"41663867\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"LAMP5 is a lysosomal/endosomal membrane protein that functions primarily as an endosomal sorting and trafficking regulator: in neurons (and its C. elegans ortholog UNC-46), it sorts the vesicular GABA transporter to synaptic vesicles and fine-tunes GABAergic synaptic transmission; in immune cells (pDCs and MLL-rearranged leukemia cells), it controls TLR9 endosomal trafficking and the balance between pro-inflammatory (NF-κB) and antiviral (type I IFN) signaling; in cancer contexts it suppresses autophagy to protect oncoproteins (MLL fusions, IRF4) from lysosomal degradation, with its expression driven by DOT1L-mediated H3K79 methylation at its locus, and it additionally stabilizes IRF4 nuclear transport via KPNA2 to sustain a c-MYC/LAMP5 feed-forward loop in myeloma.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"LAMP5 (BAD-LAMP) is an endolysosomal membrane protein that operates as an endosomal sorting and trafficking regulator across neuronal and immune contexts [#1, #4]. Unlike conventional LAMP family members, it is actively sorted away from lysosomes via a cryptic retention motif in its cytoplasmic tail and recycles to the plasma membrane through a dynamin/AP2-dependent route, defining a distinct early endocytic compartment [#1]. In neurons it concentrates at inhibitory synaptic terminals overlapping the vesicular GABA transporter, and its C. elegans ortholog UNC-46 sorts the vesicular GABA transporter to synaptic vesicles [#0]; in mammalian knockouts the transporter localizes normally, but LAMP5 tunes the dynamics of evoked GABAergic transmission and short-term plasticity, with behavioral and sensorimotor consequences [#3, #6]. In human plasmacytoid dendritic cells LAMP5 resides in the ERGIC and governs TLR9 trafficking, routing the receptor toward LAMP1+ late endosomes to favor NF-\\u03baB/TNF signaling while limiting its retention in an interferon-signaling endosomal compartment, thereby setting the balance between pro-inflammatory and type I interferon output [#2, #4]. This trafficking control is co-opted in MLL-rearranged leukemia, where LAMP5\\u2014a direct target of MLL fusions and of DOT1L-mediated H3K79 methylation driven by the LAMP5-AS1 lncRNA\\u2014shifts innate immune signal flux from interferon to pro-inflammatory endosomes and suppresses autophagy to protect MLL fusion oncoproteins from lysosomal degradation [#5, #7, #10]. In multiple myeloma LAMP5 stabilizes IRF4 by blocking its autophagy-lysosome degradation and by promoting KPNA2-dependent nuclear import, sustaining a c-MYC/LAMP5 feed-forward loop [#11].\",\n  \"teleology\": [\n    {\n      \"year\": 2007,\n      \"claim\": \"Established the founding molecular function of the LAMP5 family: the C. elegans ortholog UNC-46 acts as a sorting factor that concentrates the vesicular GABA transporter on synaptic vesicles, defining a reciprocal sorting relationship at the synapse.\",\n      \"evidence\": \"Loss-of-function mutant analysis with miniature current electrophysiology and transporter localization imaging in C. elegans\",\n      \"pmids\": [\"17558401\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether the sorting mechanism is conserved in mammals was not tested here\", \"Structural basis of transporter recognition unresolved\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Showed that mammalian LAMP5 is atypical among LAMP proteins, defining a novel early endocytic compartment and being actively sorted away from lysosomes via a cryptic cytoplasmic retention motif while recycling to the plasma membrane.\",\n      \"evidence\": \"Subcellular fractionation, GFP-tagging, and dynamin/AP2-dependent endocytosis assays in HeLa cells with neuronal immunofluorescence\",\n      \"pmids\": [\"17215451\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Identity of the sorting machinery reading the cytoplasmic tail not defined\", \"Physiological cargo of this compartment in neurons not established\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Extended LAMP5 expression beyond neurons to human plasmacytoid dendritic cells, localizing it to the ERGIC and linking it to TLR9-pathway activation.\",\n      \"evidence\": \"Immunofluorescence, subcellular fractionation, and flow cytometry of isolated human pDCs\",\n      \"pmids\": [\"21642595\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional consequence of activation-induced loss not yet defined at this stage\", \"Species difference (neuron-restricted in mouse) mechanism unexplained\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Tested conservation of the worm sorting role in mammals: LAMP5 knockout did not perturb VGAT localization but altered short-term GABAergic plasticity, redefining its mammalian role as a modulator of inhibitory transmission dynamics rather than transporter sorting.\",\n      \"evidence\": \"LAMP5 knockout mouse with immunofluorescence, short-term plasticity electrophysiology, and behavioral assays\",\n      \"pmids\": [\"27272053\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular mechanism controlling release dynamics not identified\", \"Synaptic partners mediating the plasticity effect unknown\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Defined the mechanistic immune function: LAMP5 routes TLR9 between functionally distinct endosomes to set the NF-\\u03baB versus type I interferon balance in pDCs, with reciprocal gain/loss-of-function controlling signal output.\",\n      \"evidence\": \"siRNA silencing, co-localization, endosomal fractionation, and cytokine assays in primary human pDCs\",\n      \"pmids\": [\"29030552\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct molecular interactions sorting TLR9 not mapped\", \"How TGF-\\u03b2 microenvironment regulates LAMP5 expression unresolved\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Connected LAMP5 to oncogenic transcriptional regulation and autophagy, showing it is a DOT1L/H3K79me transcriptional target that suppresses autophagy to protect MLL fusion oncoproteins from degradation.\",\n      \"evidence\": \"shRNA knockdown, ChIP, autophagic flux assays, and in vivo leukemia models\",\n      \"pmids\": [\"30651276\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular mechanism by which LAMP5 suppresses autophagy not defined\", \"Direct binding partners mediating oncoprotein protection unknown\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Confirmed the mammalian neuronal role in a second circuit, again decoupling LAMP5 from inhibitory transporter trafficking while implicating it in sensorimotor processing.\",\n      \"evidence\": \"LAMP5 knockout mouse with immunofluorescence, auditory brainstem response recording, and startle assays\",\n      \"pmids\": [\"30867010\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism linking LAMP5 to startle and ABR phenotypes not established\", \"Whether endosomal trafficking underlies the synaptic effect untested\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Unified the immune-trafficking and oncogenic roles by showing LAMP5 is a direct MLL-fusion target that diverts innate immune signal flux from interferon to pro-inflammatory endosomes to drive leukemia growth, with IRF7 epistasis defining the interferon arm.\",\n      \"evidence\": \"shRNA knockdown, NF-\\u03baB/IFN signaling assays, IRF7-depletion epistasis, surface detection, and in vivo leukemia models\",\n      \"pmids\": [\"33910331\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct molecular interactions controlling endosomal signal partitioning not mapped\", \"Mechanism of cell-surface presentation unexplained\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identified ANXA7 as a LAMP5-stabilizing partner in neurons, linking the interaction to lysosomal acidification, autophagy, and apoptosis control through the mTOR/TFEB pathway under ischemic stress.\",\n      \"evidence\": \"Co-immunoprecipitation, Asp411 site-directed mutagenesis, and functional rescue assays in neuronal cells under OGD/R\",\n      \"pmids\": [\"37620352\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single-lab Co-IP without reciprocal in vivo validation\", \"Whether ANXA7-LAMP5 axis operates outside ischemic stress unknown\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Provided initial evidence that LAMP5 has pro-survival activity in multiple myeloma, possibly via p38 activation.\",\n      \"evidence\": \"siRNA knockdown with apoptosis flow cytometry and p38 western blotting\",\n      \"pmids\": [\"37033323\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No direct mechanistic link between LAMP5 and p38 established\", \"Single indirect readout without rescue\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Resolved the upstream control of LAMP5 transcription in leukemia, showing the LAMP5-AS1 lncRNA recruits DOT1L to the locus to activate LAMP5 and sustain autophagy suppression of MLL fusion proteins.\",\n      \"evidence\": \"ChIRP, RNA pull-down, ChIP, RNA FISH, autophagy flux imaging, and in vivo survival models\",\n      \"pmids\": [\"38374003\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How LAMP5-AS1 is itself regulated not addressed\", \"Generality of the lncRNA axis beyond MLL leukemia untested\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Implicated LAMP5 in bladder cancer proliferation through the FBXW11/p27 axis.\",\n      \"evidence\": \"siRNA knockdown, proliferation assays, and FBXW11/p27 western blotting\",\n      \"pmids\": [\"41663867\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Single knockdown approach with association-level readout\", \"Direct molecular link to the FBXW11/p27 axis not demonstrated\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Defined a myeloma feed-forward loop in which LAMP5 stabilizes IRF4 both by blocking its autophagic degradation and by enhancing KPNA2-dependent nuclear import, with nuclear IRF4 driving c-MYC, which in turn reactivates LAMP5.\",\n      \"evidence\": \"Co-IP, nuclear/cytoplasmic fractionation, ChIP, pathway-inhibition assays, drug screening (pyrazofurin), and in vivo myeloma models\",\n      \"pmids\": [\"40721659\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of the LAMP5-IRF4 interaction not resolved\", \"Whether the IRF4-stabilizing mechanism extends to other cancers untested\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"It remains unknown how LAMP5's atypical endosomal sorting biochemistry mechanistically unifies its neuronal synaptic role, its TLR9/innate-immune partitioning, and its autophagy-suppressing oncogenic functions.\",\n      \"evidence\": \"No single study connects the shared trafficking activity to the divergent cell-type phenotypes\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No structural model of LAMP5 or its sorting determinants\", \"Direct molecular machinery partitioning cargo between endosomes unmapped\", \"Whether a common biochemical activity underlies neuronal, immune, and cancer roles unresolved\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [0, 4]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005768\", \"supporting_discovery_ids\": [1, 4]},\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [2]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [1, 7]},\n      {\"term_id\": \"GO:0005764\", \"supporting_discovery_ids\": [4, 8]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [1, 4]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [4, 7]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [5, 10, 11]},\n      {\"term_id\": \"R-HSA-112316\", \"supporting_discovery_ids\": [0, 3, 6]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"VGAT\", \"TLR9\", \"ANXA7\", \"IRF4\", \"KPNA2\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}