{"gene":"GABARAPL2","run_date":"2026-06-09T23:54:44","timeline":{"discoveries":[{"year":2000,"finding":"Crystal structure of GATE-16 (GABARAPL2) was solved at 1.8 Å resolution, revealing a ubiquitin fold decorated by two additional N-terminal helices. The structure suggests GATE-16 binds targets via pseudo-continuous beta-sheets similar to Ras effectors, and a second potential protein-protein interaction site may explain its adapter activity. GATE-16 was shown to associate with N-ethylmaleimide-sensitive fusion protein (NSF) and Golgi SNAREs, and participates in intra-Golgi transport.","method":"X-ray crystallography (1.8 Å); biochemical interaction studies","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Strong — crystal structure resolved with functional characterization of binding surfaces; foundational structural paper","pmids":["10856287"],"is_preprint":false},{"year":2004,"finding":"GATE-16 (GABARAPL2), like LC3 and GABARAP, undergoes post-translational lipidation (form II generation) and the lipidated form associates with autophagosomal membranes. [14C]-ethanolamine incorporation and sensitivity to mammalian Atg4B support that form II is a phosphatidylethanolamine (PE)-conjugated species.","method":"Subcellular fractionation, [14C]-ethanolamine metabolic labeling, Atg4B deconjugation assay, fluorescence microscopy","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — multiple orthogonal biochemical methods (metabolic labeling, fractionation, enzymatic deconjugation) in a widely replicated study","pmids":["15169837"],"is_preprint":false},{"year":2007,"finding":"p62/SQSTM1 directly interacts with GABARAPL2 (GATE-16) and other mammalian ATG8 homologs (LC3A, LC3B, GABARAP) via a conserved 22-residue sequence containing the LIR motif, facilitating autophagic degradation of ubiquitinated protein aggregates.","method":"Direct binding assay, co-immunoprecipitation, fluorescence microscopy with pH-sensitive tandem tag","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct binding mapped to specific motif, reciprocal co-IP, functional degradation assay; widely replicated","pmids":["17580304"],"is_preprint":false},{"year":2011,"finding":"GATE-16 (GABARAPL2) promotes membrane tethering and fusion via its N-terminal α-helices, mediated by hydrophobic interactions. A 10-amino acid peptide from the GATE-16 N-terminus is sufficient to promote membrane fusion in a cell-free system. These N-terminal residues are essential for autophagosome biogenesis in cells.","method":"Cell-free membrane fusion assay, synthetic N-terminal peptides, autophagosome biogenesis assay in cells","journal":"Developmental cell","confidence":"High","confidence_rationale":"Tier 1 / Strong — reconstituted in vitro membrane fusion with mutagenesis and functional cellular validation in a single rigorous study","pmids":["21497758"],"is_preprint":false},{"year":2013,"finding":"GIMAP6, a cytosolic GTPase expressed in immune cells, specifically interacts with GABARAPL2 (identified by biotin tag-affinity purification and chemical cross-linking in Jurkat T cells). The interaction requires the last 10 amino acids of GIMAP6 (not its AIM motif). Upon starvation, GIMAP6 co-localizes with GABARAPL2 and MAP1LC3B at autophagosomes and is degraded. GIMAP6 overexpression increases endogenous GABARAPL2 levels.","method":"Biotin tag-affinity purification, chemical cross-linking, co-immunoprecipitation, fluorescence microscopy, starvation-induced degradation assay","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — affinity purification identified interaction, cross-linking confirmed endogenous association, localization studied; single lab","pmids":["24204963"],"is_preprint":false},{"year":2013,"finding":"Knockdown of GABARAPL2/GATE-16 in acute promyelocytic leukemia (APL) cells attenuates ATRA-induced neutrophil differentiation and decreases autophagic flux, demonstrating a functional requirement for GATE-16 in myeloid differentiation and autophagosome formation.","method":"siRNA knockdown, differentiation assays, autophagic flux measurement","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean KD with specific cellular phenotype (differentiation + autophagy flux); single lab, two orthogonal readouts","pmids":["23891751"],"is_preprint":false},{"year":2015,"finding":"Conformational polymorphism of GATE-16 (GABARAPL2) was characterized: X-ray crystallography, NMR spectroscopy, and molecular dynamics simulations revealed a structural transition centered on the C-terminus that is crucial for biological activity of the protein.","method":"X-ray crystallography, NMR spectroscopy, molecular dynamics simulations","journal":"Biochemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — three complementary structural/biophysical methods on GABARAPL2 specifically; single lab","pmids":["26284781"],"is_preprint":false},{"year":2016,"finding":"Among human ATG8 orthologs (LC3B, GABARAPL2, GABARAP), only LC3B and GABARAP interact with cardiolipin (CL) in a biophysically characterized manner in vitro; GABARAPL2 does not interact with cardiolipin. Correspondingly, neither GABARAPL2 nor GABARAP translocated to mitochondria in rotenone-treated cells, while LC3B did, suggesting distinct roles for ATG8 orthologs in mitophagy.","method":"Quantitative biophysical binding assays (in vitro), fluorescence microscopy of mitochondrial translocation in human glioblastoma cells","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 1–2 / Moderate — in vitro biophysical assays combined with cellular imaging; GABARAPL2 negative result for CL interaction is experimentally established; single lab","pmids":["27764541"],"is_preprint":false},{"year":2018,"finding":"GATE-16 (GABARAPL2) plays a distinct role from GABARAP in regulating the TNF receptor Fn14: GATE-16 absence causes Fn14 accumulation within endosomes in the vicinity of autophagic membranes and regulates TWEAK signaling by Fn14 and NF-κB activity, whereas GABARAP (not GATE-16) regulates overall cellular levels of Fn14 and controls its accumulation at the ERGIC.","method":"Knockout cell lines, fluorescence microscopy, NF-κB activity assay, immunoprecipitation","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — distinct KO phenotypes for GATE-16 vs GABARAP with specific molecular readouts; single lab","pmids":["30218067"],"is_preprint":false},{"year":2019,"finding":"Residues within the core LIR motif and adjacent C-terminal region, plus ATG8 subfamily-specific residues in the LIR docking site (LDS), are critical for selective binding of autophagy receptors/adaptors to GABARAP subfamily proteins including GABARAPL2. Rendering GABARAP more LC3B-like impairs autophagy receptor degradation. The centriolar satellite protein PCM1's binding specificity for GABARAPL2 was shown to alter its cellular dynamics.","method":"In vitro binding assays, mutagenesis, cellular autophagy receptor degradation assays, live-cell imaging of PCM1 dynamics","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — mutagenesis of both LIR motif and LDS, multiple orthogonal assays (in vitro binding, cellular degradation, imaging); single lab but multiple methods","pmids":["31053714"],"is_preprint":false},{"year":2019,"finding":"GABARAP subfamily proteins including GABARAPL2 interact with mammalian Syntaxin 16 (Stx16) and other SNAREs via LIR motifs, and mAtg8s regulate lysosome biogenesis. Stx16 knockout caused defects in lysosome biogenesis, while Stx16/Stx17 double knockout completely blocked autophagic flux.","method":"LIR motif identification, co-immunoprecipitation, knockout cell lines, autophagic flux assay, lysosome biogenesis assay","journal":"The EMBO journal","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP plus genetic KO with specific lysosomal phenotype; single lab","pmids":["31625181"],"is_preprint":false},{"year":2020,"finding":"GABARAP (and by extension GABARAPL2 as a member of the GABARAP subfamily) interacts with TFEB and IRGM, and GABARAP deletion affects global transcriptional responses to starvation and downregulates TFEB targets. IRGM and GABARAPs counter mTOR's negative regulation of TFEB, and this pathway is activated during M. tuberculosis and HIV infections.","method":"Co-immunoprecipitation, knockout cell lines, transcriptome analysis, mTOR/TFEB reporter assays, infection models","journal":"Nature cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple genetic and biochemical approaches; GABARAPL2 is part of the deleted GABARAP subfamily; specific GABARAPL2 contributions not fully resolved from GABARAP","pmids":["32753672"],"is_preprint":false},{"year":2020,"finding":"ACSL3, an ER-associated lipid droplet biogenesis factor, is a stabilizing binding partner of endogenous GABARAPL2, identified using CRISPR/Cas9-tagged endogenous GABARAPL2 and interaction proteomics. GABARAPL2 binds ACSL3 via its LC3-interacting region binding site; this interaction recruits GABARAPL2 to the ER and anchors the UFM1-activating enzyme UBA5 at the ER. ACSL3 depletion and LD induction affect ufmylation components and ER-phagy.","method":"CRISPR/Cas9 endogenous tagging, interaction proteomics (IP-MS), mutagenesis of LIR-binding site, subcellular fractionation, siRNA depletion","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — endogenous tagging (eliminates overexpression artifacts), IP-MS discovery, mutagenesis validation, functional depletion phenotype; multiple orthogonal methods","pmids":["32843575"],"is_preprint":false},{"year":2020,"finding":"Irgm2 and Gate-16 (GABARAPL2) cooperatively dampen Gram-negative bacteria-induced caspase-11 non-canonical inflammasome activation in macrophages and in vivo. Gate-16 deficiency leads to increased GBP-dependent and GBP-independent caspase-11 targeting to intracellular bacteria, enhanced pyroptosis, and cytokine release.","method":"Knockout macrophages and mice, inflammasome activation assays, pyroptosis measurement, cytokine measurement, bacterial infection models","journal":"EMBO reports","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean KO in vitro and in vivo with specific mechanistic readouts (caspase-11 activity, GBP recruitment, pyroptosis); replicated in two independent labs (Eren et al. and Sakaguchi et al.)","pmids":["33124769","33042141"],"is_preprint":false},{"year":2020,"finding":"Gate-16/GABARAPL2 and Gabarap deficiency results in over-activation of caspase-11 inflammasomes (but not canonical inflammasomes) due to formation of GBP2-containing aggregates that promote IL-1β production. Gate-16/Gabarap double knockout mice show high mortality after low-dose LPS challenge, rescued by compound GBP2 deficiency.","method":"Double knockout mice and macrophages, inflammasome assays, in vivo LPS/poly(I:C) challenge, GBP2 knockout rescue","journal":"Frontiers in immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo genetic rescue experiment with mechanistic specificity (non-canonical but not canonical inflammasome); cross-validated with Eren et al. 2020","pmids":["33042141"],"is_preprint":false},{"year":2020,"finding":"GATE-16 (GABARAPL2) mediates curvature-sensitive membrane tethering via trans-assembly: in a reconstituted system with synthetic liposomes, GATE-16-PE more efficiently tethers flat large vesicles (200–400 nm diameter) compared to LC3B, while LC3B is more potent for highly curved small vesicles (50 nm). Membrane tethering requires trans-assembly and is reversible.","method":"Cell-free reconstitution with purified proteins and synthetic liposomes of defined curvature, quantitative tethering assays","journal":"Protein science","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro reconstitution with purified proteins, defined lipid vesicles, and curvature-controlled conditions; single lab but rigorous biochemical system","pmids":["31960529"],"is_preprint":false},{"year":2020,"finding":"GABARAP (as a member of GABARAP subfamily, with GABARAPL2 being a subfamily member) interact with SNAREs (Stx17 and Stx16) via LIR motifs to regulate autophagosome-lysosome fusion and lysosome biogenesis. GABARAPL2 was specifically identified as secreted inside small extracellular vesicles (sEVs) in a lipidation-dependent manner upon chloroquine treatment.","method":"Proteomics of extracellular vesicles, ATG16L1 mutant distinguishing single vs. double membrane lipidation, nanoparticle tracking","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — proteomic identification plus genetic (ATG16L1 mutant) dissection of membrane source; single lab","pmids":["35220892"],"is_preprint":false},{"year":2020,"finding":"GABARAP and LC3A bind key ESCRT-I components, contributing—along with other ESCRTs—to maintaining autophagosomal membranes in a sealed state. In cells lacking principal mATG8 proteins (including GABARAPL2), autophagosomal membranes are permeable and fail to mature into autolysosomes; autophagic organelles are arrested as amphisomes.","method":"mATG8 knockout cell lines, novel in vitro membrane sealing assay, ESCRT interaction studies, autophagic flux assays","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — novel in vitro assay plus genetic KO with specific membrane permeability phenotype and ESCRT binding mechanism; multiple orthogonal methods","pmids":["37272163"],"is_preprint":false},{"year":2020,"finding":"GABARAPL2 is critical for IFN-γ-induced growth restriction of Toxoplasma gondii in HeLa cells. GABARAPL2 is recruited to membrane structures surrounding parasitophorous vacuoles (PV). Autophagy adaptors are required for proper GABARAPL2 localization and function in this IFN-γ-induced immune response.","method":"GABARAPL2 knockdown/knockout, fluorescence microscopy, parasite growth assays, IFN-γ stimulation","journal":"Infection and immunity","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — KO/KD with specific parasitic growth phenotype and localization data; single lab","pmids":["32094251"],"is_preprint":false},{"year":2011,"finding":"ORP7 interacts with GATE-16 (GABARAPL2) via residues 1-142 of ORP7 and residues 30-117 of GATE-16 (mapped by yeast two-hybrid and bimolecular fluorescence complementation). ORP7 overexpression negatively regulates GS28 stability via proteasomal degradation in a GATE-16-binding-dependent manner. Excess ORP7 also leads to formation of autophagic vacuoles containing GATE-16.","method":"Yeast two-hybrid screening, bimolecular fluorescence complementation (BiFC), ORP7 truncation mutants, siRNA knockdown, protein stability assays","journal":"Experimental cell research","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — yeast two-hybrid plus BiFC confirmation with deletion mapping; functional link via truncation mutant lacking GATE-16 binding; single lab","pmids":["21669198"],"is_preprint":false},{"year":2021,"finding":"Septin-3 binds GABARAPL2 (and LC3B) directly; co-localization of septin-3 with LC3B increases upon chemical autophagy induction in primary neuronal cells. Septin-3 localizes to LC3B-positive membranes by electron microscopy.","method":"Co-immunoprecipitation/binding assays, fluorescence co-localization, electron microscopy, chemical autophagy induction","journal":"Cellular and molecular life sciences","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single pulldown/co-IP showing GABARAPL2 binding, colocalization data; no functional mechanistic dissection of GABARAPL2 specifically","pmids":["35932293"],"is_preprint":false},{"year":2021,"finding":"Non-canonical autophagy (CASM) induces alternative lipidation of all ATG8 proteins including GABARAPL2 to phosphatidylserine (PS), in addition to the canonical PE conjugation. ATG8-PS and ATG8-PE adducts are differentially delipidated by ATG4 family members and have different cellular dynamics. ATG8-PS serves as a molecular signature for the non-canonical autophagy pathway.","method":"Lipidomics, pharmacological CASM induction (monensin, LC3-associated phagocytosis, influenza A), ATG4 delipidation assays, ATG16L1 WD40 mutants, mass spectrometry","journal":"Molecular cell","confidence":"High","confidence_rationale":"Tier 1 / Strong — lipidomics identification of PS conjugate, multiple CASM inducers, enzymatic delipidation assays, and genetic dissection via ATG16L1 mutants; multiple orthogonal methods","pmids":["33909989"],"is_preprint":false},{"year":2022,"finding":"The LMX1B transcription factor binds multiple ATG8 proteins including GABARAPL2. Binding is dependent on subcellular localization and nutrient status. ATG8 binding stimulates LMX1B-mediated transcription for efficient autophagy and stress protection in human iPSC-derived midbrain dopaminergic neurons.","method":"Co-immunoprecipitation, live-cell imaging, iPSC-derived neuronal differentiation, transcriptional reporter assays, rotenone toxicity assay","journal":"The Journal of cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP of endogenous interaction, localization-dependent binding shown, functional transcription stimulation assay; single lab","pmids":["37014324"],"is_preprint":false},{"year":2023,"finding":"The crystal structure of GABARAP (a close GABARAPL2 subfamily member) in complex with the non-canonical LIR motif of TAX1BP1 was solved, revealing a unique binding mode. TAX1BP1 selectively interacts with ATG8 family members via this non-canonical LIR.","method":"Crystal structure determination, isothermal titration calorimetry, mutagenesis, pull-down assays","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"Medium","confidence_rationale":"Tier 1 / Weak — crystal structure is Tier 1, but the structure is of GABARAP (not GABARAPL2 directly); the paper does address GABARAPL2 binding selectivity of TAX1BP1 as part of the ATG8 family analysis; single lab","pmids":["38437556"],"is_preprint":false},{"year":2003,"finding":"GATE-16 (GABARAPL2) is proposed as an adapter in intra-Golgi SNARE priming: it assists NSF/SNAP-mediated SNARE dissociation (priming) in the Golgi, keeping dissociated cis-SNAREs apart to allow multiple fusion rounds. This review consolidates earlier biochemical evidence for GATE-16's role in membrane trafficking.","method":"Review consolidating earlier biochemical and cell-biology data; original biochemical evidence cited includes NSF/SNARE interaction studies","journal":"Biochimica et biophysica acta","confidence":"Low","confidence_rationale":"Tier 3 / Weak — review paper summarizing prior findings; no new experiments in this article; mechanistic model based on previously published data","pmids":["12914955"],"is_preprint":false}],"current_model":"GABARAPL2 (GATE-16) is a ubiquitin-like ATG8-family protein that undergoes C-terminal proteolytic processing followed by conjugation to phosphatidylethanolamine (and, during non-canonical autophagy, to phosphatidylserine) on autophagosomal and endolysosomal membranes; its N-terminal α-helices mediate membrane tethering and fusion via hydrophobic interactions in a curvature-sensitive manner favoring larger/flatter membranes; it recruits autophagy cargo receptors (e.g., p62/SQSTM1) and adaptors through LIR-LDS interactions with specificity determined by LDS residues unique to the GABARAP subfamily; it maintains autophagosomal membrane integrity together with ESCRT machinery; it participates in intra-Golgi SNARE priming through interaction with NSF and Golgi SNAREs; it dampens non-canonical (caspase-11/GBP2-dependent) inflammasome responses in cooperation with IRGM2; it is required for IFN-γ-mediated restriction of Toxoplasma gondii; and its endogenous interactome includes GIMAP6, ACSL3/UBA5 (linking it to ufmylation and ER lipid droplet biogenesis), LMX1B (connecting it to transcriptional regulation of autophagy in dopaminergic neurons), and TNF receptor Fn14 (regulating TWEAK/NF-κB signaling)."},"narrative":{"mechanistic_narrative":"GABARAPL2 (GATE-16) is a ubiquitin-like ATG8-family protein that functions as a membrane-conjugated adaptor coordinating autophagosome biogenesis, membrane fusion, and selective cargo capture [PMID:10856287, PMID:21497758]. Following C-terminal processing, it is lipidated to a phosphatidylethanolamine-conjugated form (form II) that associates with autophagosomal membranes [PMID:15169837], and during non-canonical autophagy (CASM) it is alternatively conjugated to phosphatidylserine, which serves as a molecular signature distinguishing this pathway and is differentially delipidated by ATG4 enzymes [PMID:33909989]. Its two N-terminal α-helices drive membrane tethering and fusion through hydrophobic interactions—a 10-residue N-terminal peptide is sufficient to fuse membranes in vitro and these residues are essential for autophagosome biogenesis—and tethering occurs by reversible trans-assembly that is curvature-sensitive, favoring larger/flatter vesicles in contrast to the small-curvature preference of LC3B [PMID:21497758, PMID:31960529]. GABARAPL2 recruits autophagy receptors and adaptors, including p62/SQSTM1, through LIR–LDS interactions whose selectivity is dictated by subfamily-specific residues in the LIR docking site [PMID:17580304, PMID:31053714]. Together with ESCRT machinery it maintains autophagosomal membranes in a sealed state required for maturation into autolysosomes [PMID:37272163], and via SNARE interactions it contributes to autophagosome–lysosome fusion and lysosome biogenesis [PMID:31625181]. Beyond autophagy, GABARAPL2 acts in innate immunity: it cooperates with IRGM2 to dampen caspase-11 non-canonical inflammasome activation by limiting GBP2-dependent targeting of intracellular bacteria, and Gate-16/Gabarap double-deficient mice die after low-dose LPS in a GBP2-dependent manner [PMID:33124769, PMID:33042141]; it is also required for IFN-γ–mediated restriction of Toxoplasma gondii, localizing to parasitophorous vacuole membranes [PMID:32094251]. Its endogenous interactome links it to ER lipid-droplet biology and ufmylation via ACSL3, which anchors the UFM1-activating enzyme UBA5 at the ER [PMID:32843575], to transcriptional control of autophagy through LMX1B in dopaminergic neurons [PMID:37014324], and to regulation of the TNF receptor Fn14 and TWEAK/NF-κB signaling [PMID:30218067].","teleology":[{"year":2000,"claim":"Established the structural basis for GATE-16's adaptor activity and its first functional role in membrane trafficking, framing it as a ubiquitin-fold protein with extra N-terminal helices that engages NSF and Golgi SNAREs.","evidence":"X-ray crystallography at 1.8 Å with biochemical interaction studies","pmids":["10856287"],"confidence":"High","gaps":["Did not define how the N-terminal helices engage membranes","Golgi SNARE-priming role left mechanistically informal until later reviews"]},{"year":2004,"claim":"Showed GATE-16 is post-translationally lipidated like LC3 and GABARAP, placing it in the ATG8 conjugation system and on autophagosomal membranes.","evidence":"Subcellular fractionation, [14C]-ethanolamine metabolic labeling, and Atg4B deconjugation in mammalian cells","pmids":["15169837"],"confidence":"High","gaps":["Did not resolve the functional role of lipidated GATE-16 in autophagosome formation","PE identity inferred from labeling/deconjugation rather than direct lipid structure"]},{"year":2007,"claim":"Identified the direct receptor-binding function by mapping p62/SQSTM1 binding to a LIR-containing motif, explaining how GABARAPL2 links ubiquitinated cargo to autophagy.","evidence":"Direct binding, reciprocal co-IP, and pH-sensitive tandem-tag imaging of aggregate degradation","pmids":["17580304"],"confidence":"High","gaps":["Did not establish what distinguishes GABARAPL2 from other ATG8s in receptor selection"]},{"year":2011,"claim":"Defined the membrane fusion mechanism, showing the N-terminal α-helices are sufficient and necessary for tethering/fusion and autophagosome biogenesis.","evidence":"Cell-free fusion assays with synthetic N-terminal peptides plus cellular autophagosome biogenesis assays","pmids":["21497758"],"confidence":"High","gaps":["Did not address membrane-curvature preference or how fusion is regulated in vivo"]},{"year":2011,"claim":"Linked GATE-16 to ORP7 and SNARE (GS28) stability control, extending its trafficking role beyond direct SNARE priming.","evidence":"Yeast two-hybrid, BiFC, truncation mapping, and protein stability assays","pmids":["21669198"],"confidence":"Medium","gaps":["Relied on overexpression of ORP7","Physiological relevance of GS28 regulation not established"]},{"year":2013,"claim":"Identified GIMAP6 as a specific GABARAPL2 partner degraded during starvation, suggesting GABARAPL2-mediated selective autophagy of an immune GTPase.","evidence":"Biotin tag-affinity purification, chemical cross-linking, co-IP, and starvation degradation assays in Jurkat T cells","pmids":["24204963"],"confidence":"Medium","gaps":["Single lab","Functional consequence of GIMAP6 degradation not defined"]},{"year":2013,"claim":"Demonstrated a cellular requirement for GABARAPL2 in autophagic flux and ATRA-induced myeloid differentiation.","evidence":"siRNA knockdown with differentiation and autophagic flux readouts in APL cells","pmids":["23891751"],"confidence":"Medium","gaps":["Did not separate autophagy-dependent from autophagy-independent contributions to differentiation"]},{"year":2015,"claim":"Revealed a C-terminus-centered conformational polymorphism crucial for GABARAPL2 activity, connecting structural dynamics to function.","evidence":"X-ray crystallography, NMR, and molecular dynamics simulations","pmids":["26284781"],"confidence":"High","gaps":["Did not link the conformational transition to a specific binding or lipidation step"]},{"year":2016,"claim":"Distinguished GABARAPL2 from LC3B functionally by showing it does not bind cardiolipin or translocate to mitochondria, implying it is not a primary mitophagy effector.","evidence":"Quantitative in vitro biophysical binding assays and mitochondrial translocation imaging","pmids":["27764541"],"confidence":"Medium","gaps":["Negative result for a single condition (rotenone); other mitophagy contexts untested"]},{"year":2018,"claim":"Showed GABARAPL2 and GABARAP have non-redundant roles in handling the TNF receptor Fn14, with GABARAPL2 controlling endosomal Fn14 and TWEAK/NF-κB signaling.","evidence":"Knockout cell lines, microscopy, NF-κB reporter assays, and immunoprecipitation","pmids":["30218067"],"confidence":"Medium","gaps":["Mechanism of Fn14 endosomal retention not resolved","Single lab"]},{"year":2019,"claim":"Defined the molecular basis of GABARAP-subfamily receptor selectivity, showing LIR-motif and LDS residues drive selective binding and that altering them impairs receptor degradation.","evidence":"In vitro binding, mutagenesis, cellular degradation assays, and live-cell PCM1 imaging","pmids":["31053714"],"confidence":"High","gaps":["Did not enumerate the full GABARAPL2-specific receptor repertoire"]},{"year":2019,"claim":"Connected GABARAP-subfamily proteins to SNARE-dependent autophagosome-lysosome fusion and lysosome biogenesis via LIR-mediated Stx16 binding.","evidence":"LIR mapping, co-IP, knockout cell lines, and autophagic flux/lysosome biogenesis assays","pmids":["31625181"],"confidence":"Medium","gaps":["GABARAPL2-specific contribution not isolated from other subfamily members"]},{"year":2020,"claim":"Identified ACSL3 as an endogenous stabilizing partner recruiting GABARAPL2 to the ER and anchoring UBA5, linking GABARAPL2 to ufmylation and lipid-droplet/ER-phagy biology.","evidence":"CRISPR endogenous tagging, IP-MS, LIR-site mutagenesis, fractionation, and siRNA depletion","pmids":["32843575"],"confidence":"High","gaps":["Direct enzymatic role of GABARAPL2 in ufmylation not established"]},{"year":2020,"claim":"Established GABARAPL2 as a brake on the caspase-11 non-canonical inflammasome, acting with IRGM2 to limit GBP-dependent bacterial targeting, pyroptosis, and lethal endotoxemia.","evidence":"Knockout and double-knockout macrophages and mice, inflammasome/pyroptosis assays, and GBP2-deficiency rescue, replicated across two labs","pmids":["33124769","33042141"],"confidence":"High","gaps":["Whether membrane lipidation of GABARAPL2 is required for inflammasome dampening not fully resolved"]},{"year":2020,"claim":"Defined GABARAPL2's curvature-sensitive tethering mechanism, distinguishing it from LC3B by its preference for larger/flatter vesicles via reversible trans-assembly.","evidence":"Cell-free reconstitution with purified lipidated proteins and curvature-defined synthetic liposomes","pmids":["31960529"],"confidence":"High","gaps":["In vivo relevance of the curvature preference to specific fusion events untested"]},{"year":2020,"claim":"Showed GABARAPL2 is required for IFN-γ-mediated restriction of Toxoplasma gondii and localizes to parasitophorous vacuole membranes.","evidence":"Knockdown/knockout, microscopy, and parasite growth assays under IFN-γ stimulation","pmids":["32094251"],"confidence":"Medium","gaps":["Molecular mechanism of vacuole targeting and parasite killing not defined","Single lab"]},{"year":2020,"claim":"Implicated GABARAPL2-subfamily proteins, alongside ESCRT-I, in maintaining sealed autophagosomal membranes required for autolysosome maturation.","evidence":"mATG8 knockout cell lines, a novel in vitro membrane sealing assay, ESCRT interaction studies, and flux assays","pmids":["37272163"],"confidence":"High","gaps":["Direct ESCRT binding shown for GABARAP/LC3A; GABARAPL2-specific ESCRT contacts not separately mapped"]},{"year":2021,"claim":"Established phosphatidylserine conjugation of GABARAPL2 as a hallmark of non-canonical autophagy (CASM), distinct from canonical PE lipidation in dynamics and ATG4 processing.","evidence":"Lipidomics, multiple CASM inducers, ATG4 delipidation assays, and ATG16L1 WD40 mutants","pmids":["33909989"],"confidence":"High","gaps":["Functional consequences specific to the PS-conjugated species not fully dissected"]},{"year":2022,"claim":"Linked GABARAPL2 to transcriptional control of autophagy by showing ATG8 binding stimulates LMX1B-mediated transcription and stress protection in dopaminergic neurons.","evidence":"Co-IP, live-cell imaging, iPSC-derived neuron differentiation, and transcription/toxicity assays","pmids":["37014324"],"confidence":"Medium","gaps":["GABARAPL2-specific (vs other ATG8) contribution to LMX1B regulation not isolated"]},{"year":null,"claim":"How GABARAPL2's distinct biochemical properties (curvature preference, PS-lipidation, LDS selectivity) are deployed to assign it non-redundant roles versus other ATG8 family members across autophagy, immunity, and trafficking remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model partitioning GABARAPL2 vs GABARAP/LC3 functions in vivo","Many findings inferred at the subfamily level rather than GABARAPL2 alone"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[0,2,9]},{"term_id":"GO:0008289","term_label":"lipid binding","supporting_discovery_ids":[1,3,15,21]},{"term_id":"GO:0031386","term_label":"protein tag activity","supporting_discovery_ids":[1,21]},{"term_id":"GO:0005198","term_label":"structural molecule activity","supporting_discovery_ids":[3,15,17]}],"localization":[{"term_id":"GO:0005794","term_label":"Golgi apparatus","supporting_discovery_ids":[0]},{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[12]},{"term_id":"GO:0005768","term_label":"endosome","supporting_discovery_ids":[8]},{"term_id":"GO:0005764","term_label":"lysosome","supporting_discovery_ids":[10]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[4]}],"pathway":[{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[1,3,17]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[13,14,18]},{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[0,10,24]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[13,14]}],"complexes":[],"partners":["SQSTM1","NSF","GIMAP6","ACSL3","IRGM2","LMX1B","STX16","TNFRSF12A"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P60520","full_name":"Gamma-aminobutyric acid receptor-associated protein-like 2","aliases":["GABA(A) receptor-associated protein-like 2","Ganglioside expression factor 2","GEF-2","General protein transport factor p16","Golgi-associated ATPase enhancer of 16 kDa","GATE-16","MAP1 light chain 3-related protein"],"length_aa":117,"mass_kda":13.7,"function":"Ubiquitin-like modifier involved in intra-Golgi traffic (By similarity). 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Whereas LC3s are involved in elongation of the phagophore membrane, the GABARAP/GATE-16 subfamily is essential for a later stage in autophagosome maturation (PubMed:20418806, PubMed:23209295)","subcellular_location":"Cytoplasmic vesicle, autophagosome; Endoplasmic reticulum membrane; Golgi apparatus","url":"https://www.uniprot.org/uniprotkb/P60520/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/GABARAPL2","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":"ATG3","stoichiometry":4.0}],"url":"https://opencell.sf.czbiohub.org/search/GABARAPL2","total_profiled":1310},"omim":[{"mim_id":"621081","title":"IMMUNITY-RELATED GTPase Q; IRGQ","url":"https://www.omim.org/entry/621081"},{"mim_id":"616960","title":"GTPase, IMAP FAMILY, MEMBER 6; GIMAP6","url":"https://www.omim.org/entry/616960"},{"mim_id":"611340","title":"AUTOPHAGY-RELATED 4D CYSTEINE PEPTIDASE; ATG4D","url":"https://www.omim.org/entry/611340"},{"mim_id":"611339","title":"AUTOPHAGY-RELATED 4C CYSTEINE PEPTIDASE; ATG4C","url":"https://www.omim.org/entry/611339"},{"mim_id":"611338","title":"AUTOPHAGY-RELATED 4B CYSTEINE PEPTIDASE; ATG4B","url":"https://www.omim.org/entry/611338"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Uncertain","locations":[{"location":"Nucleoplasm","reliability":"Uncertain"},{"location":"Cytosol","reliability":"Uncertain"},{"location":"Nuclear bodies","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/GABARAPL2"},"hgnc":{"alias_symbol":["GEF2","ATG8","GATE16","GATE-16","ATG8C"],"prev_symbol":[]},"alphafold":{"accession":"P60520","domains":[{"cath_id":"3.10.20.90","chopping":"3-109","consensus_level":"high","plddt":96.621,"start":3,"end":109}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P60520","model_url":"https://alphafold.ebi.ac.uk/files/AF-P60520-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P60520-F1-predicted_aligned_error_v6.png","plddt_mean":94.75},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=GABARAPL2","jax_strain_url":"https://www.jax.org/strain/search?query=GABARAPL2"},"sequence":{"accession":"P60520","fasta_url":"https://rest.uniprot.org/uniprotkb/P60520.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P60520/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P60520"}},"corpus_meta":[{"pmid":"17580304","id":"PMC_17580304","title":"p62/SQSTM1 binds directly to Atg8/LC3 to facilitate degradation of ubiquitinated protein aggregates by autophagy.","date":"2007","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/17580304","citation_count":3849,"is_preprint":false},{"pmid":"15169837","id":"PMC_15169837","title":"LC3, GABARAP and GATE16 localize to autophagosomal membrane depending on form-II formation.","date":"2004","source":"Journal of cell science","url":"https://pubmed.ncbi.nlm.nih.gov/15169837","citation_count":1205,"is_preprint":false},{"pmid":"18704115","id":"PMC_18704115","title":"The Atg8 and Atg12 ubiquitin-like conjugation systems in macroautophagy. 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The structure suggests GATE-16 binds targets via pseudo-continuous beta-sheets similar to Ras effectors, and a second potential protein-protein interaction site may explain its adapter activity. GATE-16 was shown to associate with N-ethylmaleimide-sensitive fusion protein (NSF) and Golgi SNAREs, and participates in intra-Golgi transport.\",\n      \"method\": \"X-ray crystallography (1.8 Å); biochemical interaction studies\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — crystal structure resolved with functional characterization of binding surfaces; foundational structural paper\",\n      \"pmids\": [\"10856287\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"GATE-16 (GABARAPL2), like LC3 and GABARAP, undergoes post-translational lipidation (form II generation) and the lipidated form associates with autophagosomal membranes. [14C]-ethanolamine incorporation and sensitivity to mammalian Atg4B support that form II is a phosphatidylethanolamine (PE)-conjugated species.\",\n      \"method\": \"Subcellular fractionation, [14C]-ethanolamine metabolic labeling, Atg4B deconjugation assay, fluorescence microscopy\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — multiple orthogonal biochemical methods (metabolic labeling, fractionation, enzymatic deconjugation) in a widely replicated study\",\n      \"pmids\": [\"15169837\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"p62/SQSTM1 directly interacts with GABARAPL2 (GATE-16) and other mammalian ATG8 homologs (LC3A, LC3B, GABARAP) via a conserved 22-residue sequence containing the LIR motif, facilitating autophagic degradation of ubiquitinated protein aggregates.\",\n      \"method\": \"Direct binding assay, co-immunoprecipitation, fluorescence microscopy with pH-sensitive tandem tag\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct binding mapped to specific motif, reciprocal co-IP, functional degradation assay; widely replicated\",\n      \"pmids\": [\"17580304\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"GATE-16 (GABARAPL2) promotes membrane tethering and fusion via its N-terminal α-helices, mediated by hydrophobic interactions. A 10-amino acid peptide from the GATE-16 N-terminus is sufficient to promote membrane fusion in a cell-free system. These N-terminal residues are essential for autophagosome biogenesis in cells.\",\n      \"method\": \"Cell-free membrane fusion assay, synthetic N-terminal peptides, autophagosome biogenesis assay in cells\",\n      \"journal\": \"Developmental cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — reconstituted in vitro membrane fusion with mutagenesis and functional cellular validation in a single rigorous study\",\n      \"pmids\": [\"21497758\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"GIMAP6, a cytosolic GTPase expressed in immune cells, specifically interacts with GABARAPL2 (identified by biotin tag-affinity purification and chemical cross-linking in Jurkat T cells). The interaction requires the last 10 amino acids of GIMAP6 (not its AIM motif). Upon starvation, GIMAP6 co-localizes with GABARAPL2 and MAP1LC3B at autophagosomes and is degraded. GIMAP6 overexpression increases endogenous GABARAPL2 levels.\",\n      \"method\": \"Biotin tag-affinity purification, chemical cross-linking, co-immunoprecipitation, fluorescence microscopy, starvation-induced degradation assay\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — affinity purification identified interaction, cross-linking confirmed endogenous association, localization studied; single lab\",\n      \"pmids\": [\"24204963\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Knockdown of GABARAPL2/GATE-16 in acute promyelocytic leukemia (APL) cells attenuates ATRA-induced neutrophil differentiation and decreases autophagic flux, demonstrating a functional requirement for GATE-16 in myeloid differentiation and autophagosome formation.\",\n      \"method\": \"siRNA knockdown, differentiation assays, autophagic flux measurement\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean KD with specific cellular phenotype (differentiation + autophagy flux); single lab, two orthogonal readouts\",\n      \"pmids\": [\"23891751\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Conformational polymorphism of GATE-16 (GABARAPL2) was characterized: X-ray crystallography, NMR spectroscopy, and molecular dynamics simulations revealed a structural transition centered on the C-terminus that is crucial for biological activity of the protein.\",\n      \"method\": \"X-ray crystallography, NMR spectroscopy, molecular dynamics simulations\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — three complementary structural/biophysical methods on GABARAPL2 specifically; single lab\",\n      \"pmids\": [\"26284781\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Among human ATG8 orthologs (LC3B, GABARAPL2, GABARAP), only LC3B and GABARAP interact with cardiolipin (CL) in a biophysically characterized manner in vitro; GABARAPL2 does not interact with cardiolipin. Correspondingly, neither GABARAPL2 nor GABARAP translocated to mitochondria in rotenone-treated cells, while LC3B did, suggesting distinct roles for ATG8 orthologs in mitophagy.\",\n      \"method\": \"Quantitative biophysical binding assays (in vitro), fluorescence microscopy of mitochondrial translocation in human glioblastoma cells\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — in vitro biophysical assays combined with cellular imaging; GABARAPL2 negative result for CL interaction is experimentally established; single lab\",\n      \"pmids\": [\"27764541\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"GATE-16 (GABARAPL2) plays a distinct role from GABARAP in regulating the TNF receptor Fn14: GATE-16 absence causes Fn14 accumulation within endosomes in the vicinity of autophagic membranes and regulates TWEAK signaling by Fn14 and NF-κB activity, whereas GABARAP (not GATE-16) regulates overall cellular levels of Fn14 and controls its accumulation at the ERGIC.\",\n      \"method\": \"Knockout cell lines, fluorescence microscopy, NF-κB activity assay, immunoprecipitation\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — distinct KO phenotypes for GATE-16 vs GABARAP with specific molecular readouts; single lab\",\n      \"pmids\": [\"30218067\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Residues within the core LIR motif and adjacent C-terminal region, plus ATG8 subfamily-specific residues in the LIR docking site (LDS), are critical for selective binding of autophagy receptors/adaptors to GABARAP subfamily proteins including GABARAPL2. Rendering GABARAP more LC3B-like impairs autophagy receptor degradation. The centriolar satellite protein PCM1's binding specificity for GABARAPL2 was shown to alter its cellular dynamics.\",\n      \"method\": \"In vitro binding assays, mutagenesis, cellular autophagy receptor degradation assays, live-cell imaging of PCM1 dynamics\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — mutagenesis of both LIR motif and LDS, multiple orthogonal assays (in vitro binding, cellular degradation, imaging); single lab but multiple methods\",\n      \"pmids\": [\"31053714\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"GABARAP subfamily proteins including GABARAPL2 interact with mammalian Syntaxin 16 (Stx16) and other SNAREs via LIR motifs, and mAtg8s regulate lysosome biogenesis. Stx16 knockout caused defects in lysosome biogenesis, while Stx16/Stx17 double knockout completely blocked autophagic flux.\",\n      \"method\": \"LIR motif identification, co-immunoprecipitation, knockout cell lines, autophagic flux assay, lysosome biogenesis assay\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP plus genetic KO with specific lysosomal phenotype; single lab\",\n      \"pmids\": [\"31625181\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"GABARAP (and by extension GABARAPL2 as a member of the GABARAP subfamily) interacts with TFEB and IRGM, and GABARAP deletion affects global transcriptional responses to starvation and downregulates TFEB targets. IRGM and GABARAPs counter mTOR's negative regulation of TFEB, and this pathway is activated during M. tuberculosis and HIV infections.\",\n      \"method\": \"Co-immunoprecipitation, knockout cell lines, transcriptome analysis, mTOR/TFEB reporter assays, infection models\",\n      \"journal\": \"Nature cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple genetic and biochemical approaches; GABARAPL2 is part of the deleted GABARAP subfamily; specific GABARAPL2 contributions not fully resolved from GABARAP\",\n      \"pmids\": [\"32753672\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"ACSL3, an ER-associated lipid droplet biogenesis factor, is a stabilizing binding partner of endogenous GABARAPL2, identified using CRISPR/Cas9-tagged endogenous GABARAPL2 and interaction proteomics. GABARAPL2 binds ACSL3 via its LC3-interacting region binding site; this interaction recruits GABARAPL2 to the ER and anchors the UFM1-activating enzyme UBA5 at the ER. ACSL3 depletion and LD induction affect ufmylation components and ER-phagy.\",\n      \"method\": \"CRISPR/Cas9 endogenous tagging, interaction proteomics (IP-MS), mutagenesis of LIR-binding site, subcellular fractionation, siRNA depletion\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — endogenous tagging (eliminates overexpression artifacts), IP-MS discovery, mutagenesis validation, functional depletion phenotype; multiple orthogonal methods\",\n      \"pmids\": [\"32843575\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Irgm2 and Gate-16 (GABARAPL2) cooperatively dampen Gram-negative bacteria-induced caspase-11 non-canonical inflammasome activation in macrophages and in vivo. Gate-16 deficiency leads to increased GBP-dependent and GBP-independent caspase-11 targeting to intracellular bacteria, enhanced pyroptosis, and cytokine release.\",\n      \"method\": \"Knockout macrophages and mice, inflammasome activation assays, pyroptosis measurement, cytokine measurement, bacterial infection models\",\n      \"journal\": \"EMBO reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean KO in vitro and in vivo with specific mechanistic readouts (caspase-11 activity, GBP recruitment, pyroptosis); replicated in two independent labs (Eren et al. and Sakaguchi et al.)\",\n      \"pmids\": [\"33124769\", \"33042141\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Gate-16/GABARAPL2 and Gabarap deficiency results in over-activation of caspase-11 inflammasomes (but not canonical inflammasomes) due to formation of GBP2-containing aggregates that promote IL-1β production. Gate-16/Gabarap double knockout mice show high mortality after low-dose LPS challenge, rescued by compound GBP2 deficiency.\",\n      \"method\": \"Double knockout mice and macrophages, inflammasome assays, in vivo LPS/poly(I:C) challenge, GBP2 knockout rescue\",\n      \"journal\": \"Frontiers in immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo genetic rescue experiment with mechanistic specificity (non-canonical but not canonical inflammasome); cross-validated with Eren et al. 2020\",\n      \"pmids\": [\"33042141\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"GATE-16 (GABARAPL2) mediates curvature-sensitive membrane tethering via trans-assembly: in a reconstituted system with synthetic liposomes, GATE-16-PE more efficiently tethers flat large vesicles (200–400 nm diameter) compared to LC3B, while LC3B is more potent for highly curved small vesicles (50 nm). Membrane tethering requires trans-assembly and is reversible.\",\n      \"method\": \"Cell-free reconstitution with purified proteins and synthetic liposomes of defined curvature, quantitative tethering assays\",\n      \"journal\": \"Protein science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro reconstitution with purified proteins, defined lipid vesicles, and curvature-controlled conditions; single lab but rigorous biochemical system\",\n      \"pmids\": [\"31960529\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"GABARAP (as a member of GABARAP subfamily, with GABARAPL2 being a subfamily member) interact with SNAREs (Stx17 and Stx16) via LIR motifs to regulate autophagosome-lysosome fusion and lysosome biogenesis. GABARAPL2 was specifically identified as secreted inside small extracellular vesicles (sEVs) in a lipidation-dependent manner upon chloroquine treatment.\",\n      \"method\": \"Proteomics of extracellular vesicles, ATG16L1 mutant distinguishing single vs. double membrane lipidation, nanoparticle tracking\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — proteomic identification plus genetic (ATG16L1 mutant) dissection of membrane source; single lab\",\n      \"pmids\": [\"35220892\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"GABARAP and LC3A bind key ESCRT-I components, contributing—along with other ESCRTs—to maintaining autophagosomal membranes in a sealed state. In cells lacking principal mATG8 proteins (including GABARAPL2), autophagosomal membranes are permeable and fail to mature into autolysosomes; autophagic organelles are arrested as amphisomes.\",\n      \"method\": \"mATG8 knockout cell lines, novel in vitro membrane sealing assay, ESCRT interaction studies, autophagic flux assays\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — novel in vitro assay plus genetic KO with specific membrane permeability phenotype and ESCRT binding mechanism; multiple orthogonal methods\",\n      \"pmids\": [\"37272163\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"GABARAPL2 is critical for IFN-γ-induced growth restriction of Toxoplasma gondii in HeLa cells. GABARAPL2 is recruited to membrane structures surrounding parasitophorous vacuoles (PV). Autophagy adaptors are required for proper GABARAPL2 localization and function in this IFN-γ-induced immune response.\",\n      \"method\": \"GABARAPL2 knockdown/knockout, fluorescence microscopy, parasite growth assays, IFN-γ stimulation\",\n      \"journal\": \"Infection and immunity\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — KO/KD with specific parasitic growth phenotype and localization data; single lab\",\n      \"pmids\": [\"32094251\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"ORP7 interacts with GATE-16 (GABARAPL2) via residues 1-142 of ORP7 and residues 30-117 of GATE-16 (mapped by yeast two-hybrid and bimolecular fluorescence complementation). ORP7 overexpression negatively regulates GS28 stability via proteasomal degradation in a GATE-16-binding-dependent manner. Excess ORP7 also leads to formation of autophagic vacuoles containing GATE-16.\",\n      \"method\": \"Yeast two-hybrid screening, bimolecular fluorescence complementation (BiFC), ORP7 truncation mutants, siRNA knockdown, protein stability assays\",\n      \"journal\": \"Experimental cell research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — yeast two-hybrid plus BiFC confirmation with deletion mapping; functional link via truncation mutant lacking GATE-16 binding; single lab\",\n      \"pmids\": [\"21669198\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Septin-3 binds GABARAPL2 (and LC3B) directly; co-localization of septin-3 with LC3B increases upon chemical autophagy induction in primary neuronal cells. Septin-3 localizes to LC3B-positive membranes by electron microscopy.\",\n      \"method\": \"Co-immunoprecipitation/binding assays, fluorescence co-localization, electron microscopy, chemical autophagy induction\",\n      \"journal\": \"Cellular and molecular life sciences\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single pulldown/co-IP showing GABARAPL2 binding, colocalization data; no functional mechanistic dissection of GABARAPL2 specifically\",\n      \"pmids\": [\"35932293\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Non-canonical autophagy (CASM) induces alternative lipidation of all ATG8 proteins including GABARAPL2 to phosphatidylserine (PS), in addition to the canonical PE conjugation. ATG8-PS and ATG8-PE adducts are differentially delipidated by ATG4 family members and have different cellular dynamics. ATG8-PS serves as a molecular signature for the non-canonical autophagy pathway.\",\n      \"method\": \"Lipidomics, pharmacological CASM induction (monensin, LC3-associated phagocytosis, influenza A), ATG4 delipidation assays, ATG16L1 WD40 mutants, mass spectrometry\",\n      \"journal\": \"Molecular cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — lipidomics identification of PS conjugate, multiple CASM inducers, enzymatic delipidation assays, and genetic dissection via ATG16L1 mutants; multiple orthogonal methods\",\n      \"pmids\": [\"33909989\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"The LMX1B transcription factor binds multiple ATG8 proteins including GABARAPL2. Binding is dependent on subcellular localization and nutrient status. ATG8 binding stimulates LMX1B-mediated transcription for efficient autophagy and stress protection in human iPSC-derived midbrain dopaminergic neurons.\",\n      \"method\": \"Co-immunoprecipitation, live-cell imaging, iPSC-derived neuronal differentiation, transcriptional reporter assays, rotenone toxicity assay\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP of endogenous interaction, localization-dependent binding shown, functional transcription stimulation assay; single lab\",\n      \"pmids\": [\"37014324\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"The crystal structure of GABARAP (a close GABARAPL2 subfamily member) in complex with the non-canonical LIR motif of TAX1BP1 was solved, revealing a unique binding mode. TAX1BP1 selectively interacts with ATG8 family members via this non-canonical LIR.\",\n      \"method\": \"Crystal structure determination, isothermal titration calorimetry, mutagenesis, pull-down assays\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Weak — crystal structure is Tier 1, but the structure is of GABARAP (not GABARAPL2 directly); the paper does address GABARAPL2 binding selectivity of TAX1BP1 as part of the ATG8 family analysis; single lab\",\n      \"pmids\": [\"38437556\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"GATE-16 (GABARAPL2) is proposed as an adapter in intra-Golgi SNARE priming: it assists NSF/SNAP-mediated SNARE dissociation (priming) in the Golgi, keeping dissociated cis-SNAREs apart to allow multiple fusion rounds. This review consolidates earlier biochemical evidence for GATE-16's role in membrane trafficking.\",\n      \"method\": \"Review consolidating earlier biochemical and cell-biology data; original biochemical evidence cited includes NSF/SNARE interaction studies\",\n      \"journal\": \"Biochimica et biophysica acta\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — review paper summarizing prior findings; no new experiments in this article; mechanistic model based on previously published data\",\n      \"pmids\": [\"12914955\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"GABARAPL2 (GATE-16) is a ubiquitin-like ATG8-family protein that undergoes C-terminal proteolytic processing followed by conjugation to phosphatidylethanolamine (and, during non-canonical autophagy, to phosphatidylserine) on autophagosomal and endolysosomal membranes; its N-terminal α-helices mediate membrane tethering and fusion via hydrophobic interactions in a curvature-sensitive manner favoring larger/flatter membranes; it recruits autophagy cargo receptors (e.g., p62/SQSTM1) and adaptors through LIR-LDS interactions with specificity determined by LDS residues unique to the GABARAP subfamily; it maintains autophagosomal membrane integrity together with ESCRT machinery; it participates in intra-Golgi SNARE priming through interaction with NSF and Golgi SNAREs; it dampens non-canonical (caspase-11/GBP2-dependent) inflammasome responses in cooperation with IRGM2; it is required for IFN-γ-mediated restriction of Toxoplasma gondii; and its endogenous interactome includes GIMAP6, ACSL3/UBA5 (linking it to ufmylation and ER lipid droplet biogenesis), LMX1B (connecting it to transcriptional regulation of autophagy in dopaminergic neurons), and TNF receptor Fn14 (regulating TWEAK/NF-κB signaling).\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"GABARAPL2 (GATE-16) is a ubiquitin-like ATG8-family protein that functions as a membrane-conjugated adaptor coordinating autophagosome biogenesis, membrane fusion, and selective cargo capture [#0, #3]. Following C-terminal processing, it is lipidated to a phosphatidylethanolamine-conjugated form (form II) that associates with autophagosomal membranes [#1], and during non-canonical autophagy (CASM) it is alternatively conjugated to phosphatidylserine, which serves as a molecular signature distinguishing this pathway and is differentially delipidated by ATG4 enzymes [#21]. Its two N-terminal α-helices drive membrane tethering and fusion through hydrophobic interactions—a 10-residue N-terminal peptide is sufficient to fuse membranes in vitro and these residues are essential for autophagosome biogenesis—and tethering occurs by reversible trans-assembly that is curvature-sensitive, favoring larger/flatter vesicles in contrast to the small-curvature preference of LC3B [#3, #15]. GABARAPL2 recruits autophagy receptors and adaptors, including p62/SQSTM1, through LIR–LDS interactions whose selectivity is dictated by subfamily-specific residues in the LIR docking site [#2, #9]. Together with ESCRT machinery it maintains autophagosomal membranes in a sealed state required for maturation into autolysosomes [#17], and via SNARE interactions it contributes to autophagosome–lysosome fusion and lysosome biogenesis [#10]. Beyond autophagy, GABARAPL2 acts in innate immunity: it cooperates with IRGM2 to dampen caspase-11 non-canonical inflammasome activation by limiting GBP2-dependent targeting of intracellular bacteria, and Gate-16/Gabarap double-deficient mice die after low-dose LPS in a GBP2-dependent manner [#13, #14]; it is also required for IFN-γ–mediated restriction of Toxoplasma gondii, localizing to parasitophorous vacuole membranes [#18]. Its endogenous interactome links it to ER lipid-droplet biology and ufmylation via ACSL3, which anchors the UFM1-activating enzyme UBA5 at the ER [#12], to transcriptional control of autophagy through LMX1B in dopaminergic neurons [#22], and to regulation of the TNF receptor Fn14 and TWEAK/NF-κB signaling [#8].\",\n  \"teleology\": [\n    {\n      \"year\": 2000,\n      \"claim\": \"Established the structural basis for GATE-16's adaptor activity and its first functional role in membrane trafficking, framing it as a ubiquitin-fold protein with extra N-terminal helices that engages NSF and Golgi SNAREs.\",\n      \"evidence\": \"X-ray crystallography at 1.8 Å with biochemical interaction studies\",\n      \"pmids\": [\"10856287\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not define how the N-terminal helices engage membranes\", \"Golgi SNARE-priming role left mechanistically informal until later reviews\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Showed GATE-16 is post-translationally lipidated like LC3 and GABARAP, placing it in the ATG8 conjugation system and on autophagosomal membranes.\",\n      \"evidence\": \"Subcellular fractionation, [14C]-ethanolamine metabolic labeling, and Atg4B deconjugation in mammalian cells\",\n      \"pmids\": [\"15169837\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not resolve the functional role of lipidated GATE-16 in autophagosome formation\", \"PE identity inferred from labeling/deconjugation rather than direct lipid structure\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Identified the direct receptor-binding function by mapping p62/SQSTM1 binding to a LIR-containing motif, explaining how GABARAPL2 links ubiquitinated cargo to autophagy.\",\n      \"evidence\": \"Direct binding, reciprocal co-IP, and pH-sensitive tandem-tag imaging of aggregate degradation\",\n      \"pmids\": [\"17580304\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not establish what distinguishes GABARAPL2 from other ATG8s in receptor selection\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Defined the membrane fusion mechanism, showing the N-terminal α-helices are sufficient and necessary for tethering/fusion and autophagosome biogenesis.\",\n      \"evidence\": \"Cell-free fusion assays with synthetic N-terminal peptides plus cellular autophagosome biogenesis assays\",\n      \"pmids\": [\"21497758\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not address membrane-curvature preference or how fusion is regulated in vivo\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Linked GATE-16 to ORP7 and SNARE (GS28) stability control, extending its trafficking role beyond direct SNARE priming.\",\n      \"evidence\": \"Yeast two-hybrid, BiFC, truncation mapping, and protein stability assays\",\n      \"pmids\": [\"21669198\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Relied on overexpression of ORP7\", \"Physiological relevance of GS28 regulation not established\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Identified GIMAP6 as a specific GABARAPL2 partner degraded during starvation, suggesting GABARAPL2-mediated selective autophagy of an immune GTPase.\",\n      \"evidence\": \"Biotin tag-affinity purification, chemical cross-linking, co-IP, and starvation degradation assays in Jurkat T cells\",\n      \"pmids\": [\"24204963\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab\", \"Functional consequence of GIMAP6 degradation not defined\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Demonstrated a cellular requirement for GABARAPL2 in autophagic flux and ATRA-induced myeloid differentiation.\",\n      \"evidence\": \"siRNA knockdown with differentiation and autophagic flux readouts in APL cells\",\n      \"pmids\": [\"23891751\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Did not separate autophagy-dependent from autophagy-independent contributions to differentiation\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Revealed a C-terminus-centered conformational polymorphism crucial for GABARAPL2 activity, connecting structural dynamics to function.\",\n      \"evidence\": \"X-ray crystallography, NMR, and molecular dynamics simulations\",\n      \"pmids\": [\"26284781\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not link the conformational transition to a specific binding or lipidation step\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Distinguished GABARAPL2 from LC3B functionally by showing it does not bind cardiolipin or translocate to mitochondria, implying it is not a primary mitophagy effector.\",\n      \"evidence\": \"Quantitative in vitro biophysical binding assays and mitochondrial translocation imaging\",\n      \"pmids\": [\"27764541\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Negative result for a single condition (rotenone); other mitophagy contexts untested\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Showed GABARAPL2 and GABARAP have non-redundant roles in handling the TNF receptor Fn14, with GABARAPL2 controlling endosomal Fn14 and TWEAK/NF-κB signaling.\",\n      \"evidence\": \"Knockout cell lines, microscopy, NF-κB reporter assays, and immunoprecipitation\",\n      \"pmids\": [\"30218067\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism of Fn14 endosomal retention not resolved\", \"Single lab\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Defined the molecular basis of GABARAP-subfamily receptor selectivity, showing LIR-motif and LDS residues drive selective binding and that altering them impairs receptor degradation.\",\n      \"evidence\": \"In vitro binding, mutagenesis, cellular degradation assays, and live-cell PCM1 imaging\",\n      \"pmids\": [\"31053714\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not enumerate the full GABARAPL2-specific receptor repertoire\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Connected GABARAP-subfamily proteins to SNARE-dependent autophagosome-lysosome fusion and lysosome biogenesis via LIR-mediated Stx16 binding.\",\n      \"evidence\": \"LIR mapping, co-IP, knockout cell lines, and autophagic flux/lysosome biogenesis assays\",\n      \"pmids\": [\"31625181\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"GABARAPL2-specific contribution not isolated from other subfamily members\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Identified ACSL3 as an endogenous stabilizing partner recruiting GABARAPL2 to the ER and anchoring UBA5, linking GABARAPL2 to ufmylation and lipid-droplet/ER-phagy biology.\",\n      \"evidence\": \"CRISPR endogenous tagging, IP-MS, LIR-site mutagenesis, fractionation, and siRNA depletion\",\n      \"pmids\": [\"32843575\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct enzymatic role of GABARAPL2 in ufmylation not established\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Established GABARAPL2 as a brake on the caspase-11 non-canonical inflammasome, acting with IRGM2 to limit GBP-dependent bacterial targeting, pyroptosis, and lethal endotoxemia.\",\n      \"evidence\": \"Knockout and double-knockout macrophages and mice, inflammasome/pyroptosis assays, and GBP2-deficiency rescue, replicated across two labs\",\n      \"pmids\": [\"33124769\", \"33042141\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether membrane lipidation of GABARAPL2 is required for inflammasome dampening not fully resolved\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Defined GABARAPL2's curvature-sensitive tethering mechanism, distinguishing it from LC3B by its preference for larger/flatter vesicles via reversible trans-assembly.\",\n      \"evidence\": \"Cell-free reconstitution with purified lipidated proteins and curvature-defined synthetic liposomes\",\n      \"pmids\": [\"31960529\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo relevance of the curvature preference to specific fusion events untested\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Showed GABARAPL2 is required for IFN-γ-mediated restriction of Toxoplasma gondii and localizes to parasitophorous vacuole membranes.\",\n      \"evidence\": \"Knockdown/knockout, microscopy, and parasite growth assays under IFN-γ stimulation\",\n      \"pmids\": [\"32094251\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular mechanism of vacuole targeting and parasite killing not defined\", \"Single lab\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Implicated GABARAPL2-subfamily proteins, alongside ESCRT-I, in maintaining sealed autophagosomal membranes required for autolysosome maturation.\",\n      \"evidence\": \"mATG8 knockout cell lines, a novel in vitro membrane sealing assay, ESCRT interaction studies, and flux assays\",\n      \"pmids\": [\"37272163\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct ESCRT binding shown for GABARAP/LC3A; GABARAPL2-specific ESCRT contacts not separately mapped\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Established phosphatidylserine conjugation of GABARAPL2 as a hallmark of non-canonical autophagy (CASM), distinct from canonical PE lipidation in dynamics and ATG4 processing.\",\n      \"evidence\": \"Lipidomics, multiple CASM inducers, ATG4 delipidation assays, and ATG16L1 WD40 mutants\",\n      \"pmids\": [\"33909989\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional consequences specific to the PS-conjugated species not fully dissected\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Linked GABARAPL2 to transcriptional control of autophagy by showing ATG8 binding stimulates LMX1B-mediated transcription and stress protection in dopaminergic neurons.\",\n      \"evidence\": \"Co-IP, live-cell imaging, iPSC-derived neuron differentiation, and transcription/toxicity assays\",\n      \"pmids\": [\"37014324\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"GABARAPL2-specific (vs other ATG8) contribution to LMX1B regulation not isolated\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How GABARAPL2's distinct biochemical properties (curvature preference, PS-lipidation, LDS selectivity) are deployed to assign it non-redundant roles versus other ATG8 family members across autophagy, immunity, and trafficking remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model partitioning GABARAPL2 vs GABARAP/LC3 functions in vivo\", \"Many findings inferred at the subfamily level rather than GABARAPL2 alone\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [0, 2, 9]},\n      {\"term_id\": \"GO:0008289\", \"supporting_discovery_ids\": [1, 3, 15, 21]},\n      {\"term_id\": \"GO:0031386\", \"supporting_discovery_ids\": [1, 21]},\n      {\"term_id\": \"GO:0005198\", \"supporting_discovery_ids\": [3, 15, 17]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005776\", \"supporting_discovery_ids\": [1, 4]},\n      {\"term_id\": \"GO:0005794\", \"supporting_discovery_ids\": [0]},\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [12]},\n      {\"term_id\": \"GO:0005768\", \"supporting_discovery_ids\": [8]},\n      {\"term_id\": \"GO:0005764\", \"supporting_discovery_ids\": [10]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [4]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [1, 3, 17]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [13, 14, 18]},\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [0, 10, 24]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [13, 14]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"SQSTM1\", \"NSF\", \"GIMAP6\", \"ACSL3\", \"IRGM2\", \"LMX1B\", \"STX16\", \"TNFRSF12A\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}