{"gene":"MLC1","run_date":"2026-06-10T02:59:50","timeline":{"discoveries":[{"year":2001,"finding":"Mutations in MLC1 (KIAA0027), which encodes a putative membrane protein with eight predicted transmembrane domains, cause megalencephalic leukoencephalopathy with subcortical cysts (MLC). Twelve different mutations were identified including frameshifts, splice-acceptor mutations, and amino acid substitutions in predicted transmembrane domains.","method":"Linkage analysis, mutation screening of candidate gene in affected families","journal":"American journal of human genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple families, multiple mutation types, replicated across labs; foundational disease-gene identification paper","pmids":["11254442"],"is_preprint":false},{"year":2005,"finding":"MLC1 protein is specifically localized in distal astroglial processes in perivascular, subependymal, and subpial regions of the brain, and contains an even number of transmembrane domains (consistent with a transport function). Immunohistochemistry and assembly-dependent trafficking assays confirmed plasma membrane localization.","method":"Immunohistochemistry, in situ hybridization, topology/assembly assays with polyclonal antibodies","journal":"Journal of neuropathology and experimental neurology","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (IHC, ISH, biochemical topology assays), replicated localization finding","pmids":["15892299"],"is_preprint":false},{"year":2004,"finding":"MLC1 is assembled into higher molecular complexes at the plasma membrane, and disease-causing MLC1 mutations impair protein folding/trafficking; this folding defect can be corrected in vitro by curcumin (a Ca2+-ATPase inhibitor). MLC1 is expressed in neurons and astrocytes, with localization at astrocyte end-feet membranes adjacent to blood vessels and at astrocyte-astrocyte contact regions.","method":"Immunohistochemistry, in situ hybridization, assembly-dependent trafficking assays, pharmacological rescue with curcumin","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods including biochemical trafficking assays and pharmacological rescue in a single rigorous study","pmids":["15367490"],"is_preprint":false},{"year":2007,"finding":"MLC1 is directly associated with the dystrophin-glycoprotein complex (DGC) at astrocytic endfeet, and a direct protein interaction between MLC1 and Kir4.1 was demonstrated by immunoprecipitation. In MLC brain tissue, absence of MLC1 correlates with altered expression of several DGC proteins.","method":"Immunohistochemistry, co-localization, immunoprecipitation","journal":"Acta neuropathologica","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — direct co-IP for MLC1-Kir4.1 interaction, supported by co-localization in multiple tissue contexts","pmids":["17628813"],"is_preprint":false},{"year":2007,"finding":"MLC1 membrane-associated component (60-64 kDa) localizes in astrocytic lipid rafts together with dystroglycan, syntrophin, and caveolin-1, and co-fractionates with the DGC in whole rat brain tissue. In human brain, MLC1 co-localizes with dystroglycan and syntrophin in astrocyte processes and ependymal cells.","method":"Lipid raft fractionation, co-fractionation assays, immunofluorescence, polyclonal antibody characterization","journal":"Molecular and cellular neurosciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-fractionation and localization with multiple orthogonal approaches, single lab","pmids":["18165104"],"is_preprint":false},{"year":2008,"finding":"Most disease-causing MLC1 missense mutations dramatically reduce total and plasma membrane MLC1 expression levels, due to increased ER-associated degradation and endo-lysosomal-associated degradation. The expression defect of mutant MLC1 proteins can be rescued by low temperature and glycerol (chemical chaperone), placing MLC in the class of conformational diseases.","method":"Xenopus oocyte expression, mammalian cell expression, primary rat astrocyte and human monocyte cultures, pharmacological rescue assays, biochemical/imaging methods","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple cell systems (oocytes, mammalian cells, primary cultures), multiple orthogonal methods (biochemical, pharmacological, imaging), single lab with comprehensive validation","pmids":["18757878"],"is_preprint":false},{"year":2009,"finding":"MLC1 intracellular domains interact with DGC proteins syntrophin, dystrobrevin, Kir4.1, and caveolin-1 (pull-down assays). MLC1 is expressed in intracellular vesicles and ER and undergoes caveolae/raft-mediated endocytosis. Inhibition of endocytosis and PKA/PKC-mediated MLC1 phosphorylation favor membrane-associated MLC1 expression.","method":"Pull-down assays, co-fractionation, immunostaining, subcellular fractionation, pharmacological modulation of caveolin-mediated trafficking","journal":"Neurobiology of disease","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pull-down plus subcellular fractionation plus pharmacological evidence, single lab","pmids":["19931615"],"is_preprint":false},{"year":2010,"finding":"The β1 subunit of the Na,K-ATPase pump directly interacts with MLC1 in brain astrocytes, identified by yeast two-hybrid screening with the NH2-MLC1 domain as bait, confirmed by pull-downs, co-fractionation, and immunofluorescence. MLC1 was isolated in a multiprotein complex with Na,K-ATPase, Kir4.1, syntrophin, and dystrobrevin by ouabain-affinity chromatography. Hypo-osmotic conditions increase MLC1 membrane expression and favor MLC1/Na,K-ATPase-β1 association, suggesting MLC1 is involved in osmotic control and volume regulation.","method":"Yeast two-hybrid, pull-down, co-fractionation, immunofluorescence, ouabain-affinity chromatography, hypo-osmotic stress experiments","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — yeast two-hybrid plus multiple orthogonal biochemical confirmations, functional linkage to osmotic stress","pmids":["20926452"],"is_preprint":false},{"year":2011,"finding":"Knockdown of MLC1 in primary rat astrocytes results in the appearance of intracellular vacuoles, which is reversed by co-expression of human MLC1. MLC1 localization in cell-cell contacts depends on the actin cytoskeleton (disrupted by actin-modifying agents but not by disruption of microtubules or GFAP). MLC1 and ZO-1 co-localize and co-immunoprecipitate specifically in human tissues.","method":"siRNA knockdown, rescue by human MLC1 re-expression, co-immunoprecipitation, actin/microtubule disruption assays, EM immunostaining","journal":"Neurobiology of disease","confidence":"High","confidence_rationale":"Tier 2 / Strong — loss-of-function with specific phenotypic readout (vacuolation) and rescue, plus orthogonal co-IP and cytoskeletal dependency assays","pmids":["21440627"],"is_preprint":false},{"year":2011,"finding":"MLC1 and GlialCAM form homo- and hetero-complexes. MLC-causing mutations in GLIALCAM primarily reduce formation of GlialCAM homo-complexes, impairing trafficking of GlialCAM to cell junctions and thereby also affecting MLC1 trafficking. The S69L MLC1 missense mutation reduces MLC1 protein stability and levels in brain to almost undetectable, while GlialCAM expression and localization are largely unaffected by loss of MLC1.","method":"Human post-mortem brain analysis, in vitro primary astrocyte and heterologous cell experiments, co-immunoprecipitation, biochemical stability assays","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — human tissue plus in vitro validation, multiple orthogonal methods establishing complex formation and trafficking hierarchy","pmids":["21624973"],"is_preprint":false},{"year":2013,"finding":"GlialCAM acts as a chaperone for MLC1: GlialCAM ablation causes intracellular accumulation and reduced plasma membrane expression of MLC1. GlialCAM over-expression rescues stability of mutant MLC1 variants. Reduction in GlialCAM expression results in defective activation of volume-regulated anion currents (VRAC) and increased vacuolation, phenocopying MLC1 mutations. Over-expression of GlialCAM together with MLC1 containing MLC-related mutations can reactivate VRAC currents and reverse vacuolation.","method":"Gain- and loss-of-function of GlialCAM in HeLa cells and primary astrocytes, electrophysiology (VRAC currents), vacuolation assays, biochemical stability assays","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (electrophysiology, biochemistry, cell biology), gain- and loss-of-function with defined functional readouts","pmids":["23793458"],"is_preprint":false},{"year":2014,"finding":"In GlialCAM and Mlc1 loss-of-function mouse models with myelin vacuolization: GlialCAM is important for targeting MLC1 and ClC-2 to specialized glial domains in vivo and for modifying ClC-2 biophysical properties in oligodendrocytes. MLC1 is crucial for proper localization of GlialCAM and ClC-2 and for modifying ClC-2 currents. ClC-2 is not necessary for MLC1 and GlialCAM localization. This reveals an MLC1–GlialCAM–ClC-2 functional relationship in vivo.","method":"Knock-out mouse models (Glialcam and Mlc1), electrophysiology (ClC-2 biophysical characterization), immunofluorescence localization in brain","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo KO models with electrophysiology and localization, epistasis established between MLC1, GlialCAM, and ClC-2","pmids":["24647135"],"is_preprint":false},{"year":2014,"finding":"MLC1 modulates endosomal pH and protein trafficking in astrocytes: wild-type MLC1 limits early endosomal acidification and stimulates protein recycling (transferrin recycling assay). MLC1 is abundantly expressed in early (EEA1+, Rab5+) and recycling (Rab11+) endosomes and traffics to the plasma membrane via recycling endosomes during hypo-osmotic stress. MLC1 also favors recycling of TRPV4 cation channel to the plasma membrane, which cooperates with MLC1 to activate calcium influx during hypo-osmotic stress. All disease-causing MLC1 mutations fail to influence endosomal pH and protein recycling.","method":"Biochemical, proteomic, and imaging analyses; FITC-dextran pH measurement; transferrin recycling assay; endosome marker co-localization; hypo-osmotic stress experiments in astrocytoma cells","journal":"Neurobiology of disease","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal functional assays (pH measurement, recycling assay, channel localization) with mutant controls","pmids":["24561067"],"is_preprint":false},{"year":2015,"finding":"The extracellular domain of GlialCAM is necessary for targeting to cell junctions and for interactions with itself, MLC1, and ClC-2. The C-terminus of GlialCAM is required for junction targeting but not for biochemical interaction. The first three residues of the GlialCAM transmembrane segment are required for GlialCAM-mediated ClC-2 activation but not for targeting or interaction with MLC1.","method":"Mutagenesis, functional electrophysiology, biochemical interaction assays (co-immunoprecipitation), cell junction targeting assays","journal":"The Journal of physiology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — mutagenesis combined with functional electrophysiology and biochemical interaction assays in a single study","pmids":["26033718"],"is_preprint":false},{"year":2018,"finding":"MLC1 and LRRC8A (main subunit of VRAC) are functionally linked: MLC1 cannot potentiate VRAC currents when LRRC8A is knocked down. However, LRRC8A and MLC1 do not co-localize or interact directly, and MLC1 does not potentiate LRRC8-mediated VRAC currents in Xenopus oocytes, indicating VRAC modulation by MLC1 is indirect. MLC1 overexpression decreases ERK phosphorylation; loss of MLC1 increases ERK phosphorylation. Changes in MLC1 levels alter phosphorylation state of VRAC subunit LRRC8C.","method":"LRRC8A knockdown, VRAC electrophysiology in astrocytes and Xenopus oocytes, co-localization/co-immunoprecipitation (negative for direct interaction), ERK phosphorylation assays, LRRC8C phosphorylation assays","journal":"Neurobiology of disease","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods, positive and negative controls, Xenopus oocyte system separating direct vs. indirect effects","pmids":["30076890"],"is_preprint":false},{"year":2019,"finding":"Wild-type MLC1 plasma membrane localization is critical for actin dynamics: MLC1 overexpression induces filopodia formation and suppresses cell motility. Knockdown of Mlc1 induces Arp3-Cortactin interaction, lamellipodia formation, and increased membrane ruffling in astrocytes, implicating MLC1 in regulation of actin remodeling via the ARP2/3 complex. Patient-derived MLC1 mutants are trapped in the ER and do not affect morphology or motility.","method":"Confocal and live cell imaging, RNAi knockdown, co-immunoprecipitation, surface biotinylation, overexpression of wild-type and mutant MLC1","journal":"Molecular brain","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — live imaging with biochemical support, single lab with multiple approaches","pmids":["31888684"],"is_preprint":false},{"year":2019,"finding":"MLC1 inhibits astrocyte activation by down-regulating IL-1β-induced inflammatory signals (pERK, pNF-κB). IL-1β stimulates wild-type MLC1 plasma membrane expression. Wild-type MLC1 expression reduces levels of astrogliosis marker pSTAT3. MLC1 is upregulated in demyelinating/remyelinating cerebellar organotypic cultures during recovery phases, suggesting MLC1 contributes to restoring astrocyte homeostasis after inflammation.","method":"Human brain tissue analysis (MS, Alzheimer's, CJD), astrocytoma lines overexpressing WT or mutant MLC1, primary astrocytes from control and Mlc1 KO mice, IL-1β stimulation, western blot for pERK/pNF-kB/pSTAT3, cerebellar organotypic culture model","journal":"Molecular neurobiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple cell models and human tissue, KO astrocytes and overexpression, single lab","pmids":["31209783"],"is_preprint":false},{"year":2020,"finding":"Wild-type MLC1 expression favors gap junction intercellular communication by inhibiting ERK1/2-mediated Cx43 phosphorylation and increasing Cx43 gap-junction stability in astrocytes. Mutant MLC1 fails to regulate Cx43. This was shown using biochemical and electrophysiological techniques in astrocytoma cells.","method":"Biochemical assays (co-immunoprecipitation, western blot for phospho-Cx43), electrophysiology (gap junction conductance), overexpression of wild-type vs. pathological mutant MLC1","journal":"Cells","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — electrophysiology plus biochemistry, mutant controls, single lab","pmids":["32521795"],"is_preprint":false},{"year":2020,"finding":"Genetic inhibition of MLC1 in glioblastoma stem-like cells (GSCs) using RNAi results in diminished growth and invasion in vitro and impaired tumor initiation and progression in vivo. Biochemical assays identify the receptor tyrosine kinase Axl and its intracellular signaling effectors as important downstream mediators of MLC1-controlled invasive growth.","method":"RNAi-mediated gene silencing in GSCs, in vitro growth/invasion assays, in vivo tumor initiation model, biochemical assays for Axl signaling","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — loss-of-function with in vitro and in vivo phenotype plus biochemical pathway placement, single lab","pmids":["33040087"],"is_preprint":false},{"year":2021,"finding":"Ablation of Mlc1-expressing perivascular astrocytes (PAs) using a Mlc1-T2A-CreERT2 knock-in mouse causes severe defects in blood-brain barrier (BBB) integrity, resulting in premature death. PA loss causes aberrant localization of Claudin-5 and VE-Cadherin in endothelial cell junctions and robust microgliosis, demonstrating that Mlc1-expressing PAs are essential for endothelial barrier integrity.","method":"Mlc1-T2A-CreERT2 knock-in mouse model, conditional PA ablation, immunofluorescence for tight junction proteins (Claudin-5, VE-Cadherin), BBB integrity assays, histology","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo conditional cell ablation with specific molecular and functional readouts (endothelial junction proteins, BBB permeability, survival)","pmids":["34965971"],"is_preprint":false},{"year":2019,"finding":"MLC1 and GlialCAM are enriched and assembled into mature complexes in astrocyte perivascular endfeet between postnatal days 10 and 15, after Aquaporin 4 formation, correlating with increased expression of BBB components Claudin-5 and P-gP. This was established using purified gliovascular units from postnatal mouse brain.","method":"Purified gliovascular units, western blot, immunofluorescence across postnatal timepoints","journal":"Brain structure & function","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct biochemical fractionation of gliovascular units with temporal resolution, single lab","pmids":["30684007"],"is_preprint":false},{"year":2022,"finding":"MLC1 is a substrate of Ca2+/Calmodulin-dependent protein kinase II (CaMKII): MLC1 phosphorylation by CaMKII occurs in response to intracellular Ca2+ release and potentiates VRAC-mediated chloride currents (ICl,swell) in astrocytes. This links volume regulation to Ca2+ signaling via CaMKII-MLC1 axis.","method":"Molecular, biochemical, proteomic, electrophysiological, and imaging techniques; CaMKII inhibition/activation; Ca2+ imaging; VRAC current measurement","journal":"Cells","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — identified writer (CaMKII), PTM (phosphorylation), and functional consequence (VRAC potentiation) using multiple orthogonal methods including electrophysiology, single lab","pmids":["36078064"],"is_preprint":false}],"current_model":"MLC1 is an eight-transmembrane astrocytic membrane protein that localizes to perivascular endfeet and astrocyte-astrocyte junctions, where it forms hetero- and homo-complexes with GlialCAM (which acts as its chaperone for plasma membrane targeting) and associates with the dystrophin-glycoprotein complex (including Kir4.1, syntrophin, dystrobrevin), Na,K-ATPase-β1, and ZO-1; it undergoes CaMKII-mediated phosphorylation in response to intracellular Ca2+ release to potentiate volume-regulated anion channel (VRAC/LRRC8) currents indirectly via ERK/LRRC8C phosphorylation, modulates endosomal pH and protein recycling (including TRPV4), regulates Connexin-43 gap junction stability by inhibiting ERK1/2-mediated Cx43 phosphorylation, and controls actin remodeling via the ARP2/3 complex; disease-causing mutations cause protein misfolding and ER retention leading to loss of these functions, with Mlc1-expressing perivascular astrocytes being essential for blood-brain barrier integrity in vivo."},"narrative":{"mechanistic_narrative":"MLC1 is an eight-transmembrane astrocytic membrane protein that localizes to distal astroglial processes at perivascular, subependymal, and subpial endfeet and to astrocyte-astrocyte contacts, where it organizes osmotic and volume-regulatory signaling [PMID:11254442, PMID:15892299, PMID:15367490]. At the plasma membrane MLC1 assembles into higher-order complexes with the dystrophin-glycoprotein complex (DGC), interacting directly with Kir4.1, syntrophin, dystrobrevin, and caveolin-1, and partitioning into astrocytic lipid rafts [PMID:17628813, PMID:18165104, PMID:19931615]; it also binds the Na,K-ATPase β1 subunit, an association favored under hypo-osmotic stress that links MLC1 to cell volume control [PMID:20926452]. GlialCAM serves as the obligate chaperone that traffics MLC1 to cell junctions, and the two form homo- and hetero-complexes that, together with the ClC-2 chloride channel, constitute a functional MLC1–GlialCAM–ClC-2 unit required for proper glial-domain targeting in vivo [PMID:21624973, PMID:23793458, PMID:24647135]. Functionally, MLC1 controls cell volume and osmotic homeostasis: it potentiates volume-regulated anion currents (VRAC/LRRC8) indirectly—without binding LRRC8A—by modulating ERK and LRRC8C phosphorylation, and is itself a CaMKII substrate phosphorylated upon intracellular Ca2+ release to potentiate ICl,swell [PMID:23793458, PMID:30076890, PMID:36078064]. MLC1 additionally limits endosomal acidification and promotes recycling of itself and the TRPV4 channel, regulates actin remodeling through the ARP2/3 complex, stabilizes Connexin-43 gap junctions by inhibiting ERK1/2-mediated Cx43 phosphorylation, and dampens IL-1β-driven inflammatory signaling [PMID:24561067, PMID:31888684, PMID:31209783, PMID:32521795]. Disease-causing MLC1 mutations cause protein misfolding, ER retention, and enhanced degradation, abolishing these functions, and MLC1 mutations cause megalencephalic leukoencephalopathy with subcortical cysts; in vivo, Mlc1-expressing perivascular astrocytes are essential for blood-brain barrier integrity [PMID:11254442, PMID:18757878, PMID:34965971].","teleology":[{"year":2001,"claim":"Established MLC1 as a disease gene, defining the question of what cellular function a predicted eight-transmembrane protein performs whose loss causes leukoencephalopathy.","evidence":"Linkage analysis and mutation screening in MLC families","pmids":["11254442"],"confidence":"High","gaps":["Protein function and subcellular role unknown","No localization or interaction data","Topology only predicted"]},{"year":2005,"claim":"Localized MLC1 to distal astroglial processes at perivascular, subependymal, and subpial regions, placing the protein at glial membrane interfaces and supporting a transport-related role from its even transmembrane count.","evidence":"Immunohistochemistry, in situ hybridization, and biochemical topology assays in brain","pmids":["15892299"],"confidence":"High","gaps":["No transported substrate identified","Binding partners unknown","Functional consequence of localization untested"]},{"year":2004,"claim":"Showed MLC1 assembles into plasma-membrane complexes and that disease mutations are folding/trafficking defects, framing MLC as a conformational disease amenable to chemical rescue.","evidence":"Assembly-dependent trafficking assays and pharmacological rescue with curcumin","pmids":["15367490"],"confidence":"High","gaps":["Identity of complex partners not defined","Mechanism of curcumin rescue unclear"]},{"year":2007,"claim":"Identified the dystrophin-glycoprotein complex as MLC1's molecular environment, with a direct MLC1-Kir4.1 interaction, connecting MLC1 to potassium and water homeostasis machinery at endfeet.","evidence":"Co-localization and immunoprecipitation in human brain tissue (idx 3); lipid-raft co-fractionation with dystroglycan, syntrophin, caveolin-1 (idx 4)","pmids":["17628813","18165104"],"confidence":"Medium","gaps":["Direct vs. complex-mediated interactions not fully separated","Functional consequence of DGC association untested"]},{"year":2008,"claim":"Defined the molecular basis of pathogenic missense mutations as enhanced ER-associated and endo-lysosomal degradation, confirming MLC as a conformational disease rescuable by chaperone-like conditions.","evidence":"Expression in oocytes, mammalian cells, and primary cultures with low-temperature/glycerol rescue","pmids":["18757878"],"confidence":"High","gaps":["Does not establish lost downstream function","Rescue not validated in vivo"]},{"year":2010,"claim":"Connected MLC1 to volume regulation by identifying a direct Na,K-ATPase-β1 interaction and showing hypo-osmotic stress drives MLC1 membrane recruitment and complex assembly.","evidence":"Yeast two-hybrid, pull-down, ouabain-affinity chromatography, hypo-osmotic stress in astrocytes","pmids":["20926452"],"confidence":"High","gaps":["Mechanism linking complex to volume sensing not resolved","Ion-transport activity not directly demonstrated"]},{"year":2011,"claim":"Demonstrated MLC1 loss-of-function causes intracellular vacuolation reversible by re-expression, and that membrane localization at junctions depends on the actin cytoskeleton and ZO-1, linking MLC1 to junctional architecture.","evidence":"siRNA knockdown with rescue, co-IP with ZO-1, cytoskeletal disruption assays (idx 8); GlialCAM homo/hetero-complex and trafficking hierarchy (idx 9)","pmids":["21440627","21624973"],"confidence":"High","gaps":["Cause of vacuolation mechanism unclear","Functional readout of ZO-1 interaction undefined"]},{"year":2013,"claim":"Established GlialCAM as the chaperone required for MLC1 plasma-membrane targeting and VRAC activation, providing a unifying explanation for why GLIALCAM and MLC1 mutations phenocopy each other.","evidence":"Gain/loss-of-function of GlialCAM in HeLa and astrocytes with VRAC electrophysiology and vacuolation assays","pmids":["23793458"],"confidence":"High","gaps":["Mechanism of VRAC potentiation not yet defined","Direct vs. indirect channel coupling unresolved"]},{"year":2014,"claim":"Defined the in vivo MLC1–GlialCAM–ClC-2 functional axis and showed MLC1 modulates endosomal pH and recycling of itself and TRPV4, establishing roles in chloride channel regulation and endosomal protein trafficking.","evidence":"Glialcam and Mlc1 KO mice with ClC-2 electrophysiology (idx 11); endosomal pH, transferrin and TRPV4 recycling assays with mutant controls (idx 12)","pmids":["24647135","24561067"],"confidence":"High","gaps":["How MLC1 sets endosomal pH mechanistically unknown","ClC-2 modulation mechanism not molecularly defined"]},{"year":2015,"claim":"Mapped the GlialCAM domains required for junction targeting, MLC1/ClC-2 interaction, and ClC-2 activation, separating the structural determinants of complex assembly from channel modulation.","evidence":"Mutagenesis with electrophysiology and biochemical interaction assays","pmids":["26033718"],"confidence":"High","gaps":["Corresponding MLC1 interaction determinants not mapped","Structural model absent"]},{"year":2018,"claim":"Resolved that MLC1 potentiates VRAC indirectly through ERK signaling and LRRC8C phosphorylation rather than by binding LRRC8A, clarifying the signaling logic of MLC1's volume-regulatory effect.","evidence":"LRRC8A knockdown, VRAC electrophysiology in astrocytes and oocytes, ERK and LRRC8C phosphorylation assays","pmids":["30076890"],"confidence":"High","gaps":["How MLC1 controls ERK activity mechanistically unknown","Kinase acting on LRRC8C not defined"]},{"year":2019,"claim":"Extended MLC1 function to actin remodeling via ARP2/3, anti-inflammatory regulation of astrocyte activation, and developmental assembly of perivascular complexes coincident with BBB maturation.","evidence":"Imaging/RNAi of actin dynamics and Arp3-Cortactin (idx 15); IL-1β stimulation and pERK/pNF-κB/pSTAT3 assays (idx 16); gliovascular unit fractionation across postnatal timepoints (idx 20)","pmids":["31888684","31209783","30684007"],"confidence":"Medium","gaps":["Direct vs. signaling-mediated actin effects unresolved","Anti-inflammatory mechanism not molecularly defined"]},{"year":2020,"claim":"Showed MLC1 stabilizes Cx43 gap junctions by inhibiting ERK1/2-mediated Cx43 phosphorylation and that MLC1 drives glioblastoma stem-cell invasion via Axl signaling, broadening its roles to intercellular communication and tumor biology.","evidence":"Co-IP, phospho-Cx43 western blot, gap-junction electrophysiology (idx 17); RNAi in GSCs with in vitro/in vivo invasion assays and Axl pathway analysis (idx 18)","pmids":["32521795","33040087"],"confidence":"Medium","gaps":["Mechanism by which MLC1 suppresses ERK not defined","Direct link between MLC1 and Axl not established"]},{"year":2021,"claim":"Demonstrated in vivo that Mlc1-expressing perivascular astrocytes are essential for blood-brain barrier integrity, connecting the cell type defined by MLC1 to endothelial junction maintenance.","evidence":"Mlc1-T2A-CreERT2 conditional astrocyte ablation with Claudin-5/VE-Cadherin imaging and BBB integrity assays","pmids":["34965971"],"confidence":"High","gaps":["Does not isolate MLC1 protein function from astrocyte presence","Molecular signal to endothelium unknown"]},{"year":2022,"claim":"Identified CaMKII as the kinase that phosphorylates MLC1 upon intracellular Ca2+ release to potentiate swelling-activated chloride currents, defining a Ca2+-CaMKII-MLC1 axis coupling Ca2+ signaling to volume regulation.","evidence":"CaMKII inhibition/activation, Ca2+ imaging, and VRAC current measurement in astrocytes","pmids":["36078064"],"confidence":"High","gaps":["Phosphorylation site(s) not mapped","How phosphorylation alters MLC1 activity unknown"]},{"year":null,"claim":"The primary biochemical activity of MLC1—whether it transports ions/solutes itself or acts purely as a scaffold/regulator—remains undefined, as does the structural basis for its assembly with GlialCAM and the DGC.","evidence":"No discovery in the timeline demonstrates direct transport activity or provides a structural model","pmids":[],"confidence":"Low","gaps":["No demonstrated direct transport function","No high-resolution structure of MLC1 or its complexes","Phosphosite-level mechanism of regulation unresolved"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[10,14,17,21]},{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[3,7,8]}],"localization":[{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[1,2,5,7]},{"term_id":"GO:0005768","term_label":"endosome","supporting_discovery_ids":[6,12]},{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[5,6,15]}],"pathway":[{"term_id":"R-HSA-382551","term_label":"Transport of small molecules","supporting_discovery_ids":[7,10,12]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[14,17,21]}],"complexes":["dystrophin-glycoprotein complex","MLC1-GlialCAM-ClC-2 complex","Na,K-ATPase complex"],"partners":["GLIALCAM","KIR4.1","SYNTROPHIN","DYSTROBREVIN","CAVEOLIN-1","ATP1B1","ZO-1","CLCN2"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q15049","full_name":"Membrane protein MLC1","aliases":["Megalencephalic leukoencephalopathy with subcortical cysts protein 1"],"length_aa":377,"mass_kda":41.1,"function":"Transmembrane protein mainly expressed in brain astrocytes that may play a role in transport across the blood-brain and brain-cerebrospinal fluid barriers (PubMed:22328087). Regulates the response of astrocytes to hypo-osmosis by promoting calcium influx (PubMed:22328087). May function as regulatory protein of membrane protein complexes such as ion channels (Probable)","subcellular_location":"Membrane; Cell membrane; Cytoplasm, perinuclear region; Endoplasmic reticulum","url":"https://www.uniprot.org/uniprotkb/Q15049/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/MLC1","classification":"Not Classified","n_dependent_lines":2,"n_total_lines":1208,"dependency_fraction":0.0016556291390728477},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/MLC1","total_profiled":1310},"omim":[{"mim_id":"620448","title":"MEGALENCEPHALIC LEUKOENCEPHALOPATHY WITH SUBCORTICAL CYSTS 4, REMITTING; MLC4","url":"https://www.omim.org/entry/620448"},{"mim_id":"620447","title":"MEGALENCEPHALIC LEUKOENCEPHALOPATHY WITH SUBCORTICAL CYSTS 3; MLC3","url":"https://www.omim.org/entry/620447"},{"mim_id":"613926","title":"MEGALENCEPHALIC LEUKOENCEPHALOPATHY WITH SUBCORTICAL CYSTS 2B, REMITTING, WITH OR WITHOUT IMPAIRED INTELLECTUAL DEVELOPMENT; MLC2B","url":"https://www.omim.org/entry/613926"},{"mim_id":"613925","title":"MEGALENCEPHALIC LEUKOENCEPHALOPATHY WITH SUBCORTICAL CYSTS 2A; MLC2A","url":"https://www.omim.org/entry/613925"},{"mim_id":"611642","title":"HEPATOCYTE CELL ADHESION MOLECULE; HEPACAM","url":"https://www.omim.org/entry/611642"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Cytosol","reliability":"Supported"}],"tissue_specificity":"Tissue enriched","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":231.9}],"url":"https://www.proteinatlas.org/search/MLC1"},"hgnc":{"alias_symbol":["MLC","KIAA0027","LVM","VL"],"prev_symbol":[]},"alphafold":{"accession":"Q15049","domains":[{"cath_id":"-","chopping":"189-337","consensus_level":"medium","plddt":80.3573,"start":189,"end":337},{"cath_id":"1.20.120","chopping":"47-169","consensus_level":"medium","plddt":85.3014,"start":47,"end":169}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q15049","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q15049-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q15049-F1-predicted_aligned_error_v6.png","plddt_mean":71.81},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=MLC1","jax_strain_url":"https://www.jax.org/strain/search?query=MLC1"},"sequence":{"accession":"Q15049","fasta_url":"https://rest.uniprot.org/uniprotkb/Q15049.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q15049/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q15049"}},"corpus_meta":[{"pmid":"15800193","id":"PMC_15800193","title":"A GIT1/PIX/Rac/PAK signaling module regulates spine morphogenesis and synapse formation through MLC.","date":"2005","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/15800193","citation_count":284,"is_preprint":false},{"pmid":"9516143","id":"PMC_9516143","title":"Somatic hypermutation, clonal diversity, and preferential expression of the VH 51p1/VL kv325 immunoglobulin gene combination in hepatitis C virus-associated immunocytomas.","date":"1998","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/9516143","citation_count":221,"is_preprint":false},{"pmid":"11254442","id":"PMC_11254442","title":"Mutations of MLC1 (KIAA0027), encoding a putative membrane protein, cause megalencephalic leukoencephalopathy with subcortical cysts.","date":"2001","source":"American journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/11254442","citation_count":218,"is_preprint":false},{"pmid":"11350795","id":"PMC_11350795","title":"Differential effect of MLC kinase in TNF-alpha-induced endothelial cell apoptosis and barrier dysfunction.","date":"2001","source":"American journal of physiology. Lung cellular and molecular physiology","url":"https://pubmed.ncbi.nlm.nih.gov/11350795","citation_count":186,"is_preprint":false},{"pmid":"32323059","id":"PMC_32323059","title":"Resistive Random Access Memory (RRAM): an Overview of Materials, Switching Mechanism, Performance, Multilevel Cell (mlc) Storage, Modeling, and Applications.","date":"2020","source":"Nanoscale research letters","url":"https://pubmed.ncbi.nlm.nih.gov/32323059","citation_count":156,"is_preprint":false},{"pmid":"24196838","id":"PMC_24196838","title":"ARF1 regulates the Rho/MLC pathway to control EGF-dependent breast cancer cell invasion.","date":"2013","source":"Molecular biology of the cell","url":"https://pubmed.ncbi.nlm.nih.gov/24196838","citation_count":118,"is_preprint":false},{"pmid":"23708320","id":"PMC_23708320","title":"ABangle: characterising the VH-VL orientation in antibodies.","date":"2013","source":"Protein engineering, design & selection : PEDS","url":"https://pubmed.ncbi.nlm.nih.gov/23708320","citation_count":104,"is_preprint":false},{"pmid":"10484342","id":"PMC_10484342","title":"PKC-dependent regulation of transepithelial resistance: roles of MLC and MLC kinase.","date":"1999","source":"The American journal of physiology","url":"https://pubmed.ncbi.nlm.nih.gov/10484342","citation_count":102,"is_preprint":false},{"pmid":"24647135","id":"PMC_24647135","title":"Disrupting MLC1 and GlialCAM and ClC-2 interactions in leukodystrophy entails glial chloride channel dysfunction.","date":"2014","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/24647135","citation_count":101,"is_preprint":false},{"pmid":"24100445","id":"PMC_24100445","title":"cAMP signaling regulates platelet myosin light chain (MLC) phosphorylation and shape change through targeting the RhoA-Rho kinase-MLC phosphatase signaling pathway.","date":"2013","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/24100445","citation_count":99,"is_preprint":false},{"pmid":"11157755","id":"PMC_11157755","title":"The Escherichia coli glucose transporter enzyme IICB(Glc) recruits the global repressor Mlc.","date":"2001","source":"The EMBO journal","url":"https://pubmed.ncbi.nlm.nih.gov/11157755","citation_count":98,"is_preprint":false},{"pmid":"9767573","id":"PMC_9767573","title":"Expression of ptsG, the gene for the major glucose PTS transporter in Escherichia coli, is repressed by Mlc and induced by growth on glucose.","date":"1998","source":"Molecular microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/9767573","citation_count":93,"is_preprint":false},{"pmid":"15892299","id":"PMC_15892299","title":"MLC1: a novel protein in distal astroglial processes.","date":"2005","source":"Journal of neuropathology and experimental neurology","url":"https://pubmed.ncbi.nlm.nih.gov/15892299","citation_count":88,"is_preprint":false},{"pmid":"21624973","id":"PMC_21624973","title":"Molecular mechanisms of MLC1 and GLIALCAM mutations in megalencephalic leukoencephalopathy with subcortical cysts.","date":"2011","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/21624973","citation_count":86,"is_preprint":false},{"pmid":"8978295","id":"PMC_8978295","title":"Myeloma VL and VH gene sequences reveal a complementary imprint of antigen selection in tumor cells.","date":"1997","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/8978295","citation_count":86,"is_preprint":false},{"pmid":"29635128","id":"PMC_29635128","title":"Naringin attenuates MLC phosphorylation and NF-κB activation to protect sepsis-induced intestinal injury via RhoA/ROCK pathway.","date":"2018","source":"Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie","url":"https://pubmed.ncbi.nlm.nih.gov/29635128","citation_count":84,"is_preprint":false},{"pmid":"12748065","id":"PMC_12748065","title":"Hyperosmotic stress activates Rho: differential involvement in Rho kinase-dependent MLC phosphorylation and NKCC activation.","date":"2003","source":"American journal of physiology. Cell physiology","url":"https://pubmed.ncbi.nlm.nih.gov/12748065","citation_count":79,"is_preprint":false},{"pmid":"33260251","id":"PMC_33260251","title":"AAPM Task Group 264: The safe clinical implementation of MLC tracking in radiotherapy.","date":"2021","source":"Medical physics","url":"https://pubmed.ncbi.nlm.nih.gov/33260251","citation_count":79,"is_preprint":false},{"pmid":"15367490","id":"PMC_15367490","title":"Localization and functional analyses of the MLC1 protein involved in megalencephalic leukoencephalopathy with subcortical cysts.","date":"2004","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/15367490","citation_count":77,"is_preprint":false},{"pmid":"16390872","id":"PMC_16390872","title":"The RhoA/ROCK-I/MLC pathway is involved in the ethanol-induced apoptosis by anoikis in astrocytes.","date":"2006","source":"Journal of cell science","url":"https://pubmed.ncbi.nlm.nih.gov/16390872","citation_count":77,"is_preprint":false},{"pmid":"11741826","id":"PMC_11741826","title":"p38 MAPK activation by TGF-beta1 increases MLC phosphorylation and endothelial monolayer permeability.","date":"2002","source":"American journal of physiology. Lung cellular and molecular physiology","url":"https://pubmed.ncbi.nlm.nih.gov/11741826","citation_count":77,"is_preprint":false},{"pmid":"6834092","id":"PMC_6834092","title":"Responses of neurons in VPL and VPL-VL region of the cat to algesic stimulation of muscle and tendon.","date":"1983","source":"Journal of neurophysiology","url":"https://pubmed.ncbi.nlm.nih.gov/6834092","citation_count":75,"is_preprint":false},{"pmid":"10411743","id":"PMC_10411743","title":"Expression of the phosphotransferase system both mediates and is mediated by Mlc regulation in Escherichia coli.","date":"1999","source":"Molecular microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/10411743","citation_count":71,"is_preprint":false},{"pmid":"6418816","id":"PMC_6418816","title":"VL-VH expression by monoclonal antibodies recognizing avian lysozyme.","date":"1984","source":"Journal of immunology (Baltimore, Md. : 1950)","url":"https://pubmed.ncbi.nlm.nih.gov/6418816","citation_count":68,"is_preprint":false},{"pmid":"10518947","id":"PMC_10518947","title":"Intrabody construction and expression. I. The critical role of VL domain stability.","date":"1999","source":"Journal of molecular biology","url":"https://pubmed.ncbi.nlm.nih.gov/10518947","citation_count":63,"is_preprint":false},{"pmid":"21440627","id":"PMC_21440627","title":"Knockdown of MLC1 in primary astrocytes causes cell vacuolation: a MLC disease cell model.","date":"2011","source":"Neurobiology of disease","url":"https://pubmed.ncbi.nlm.nih.gov/21440627","citation_count":61,"is_preprint":false},{"pmid":"22802295","id":"PMC_22802295","title":"Germline VH/VL pairing in antibodies.","date":"2012","source":"Protein engineering, design & selection : PEDS","url":"https://pubmed.ncbi.nlm.nih.gov/22802295","citation_count":58,"is_preprint":false},{"pmid":"15037685","id":"PMC_15037685","title":"Indian Agarwal megalencephalic leukodystrophy with cysts is caused by a common MLC1 mutation.","date":"2004","source":"Neurology","url":"https://pubmed.ncbi.nlm.nih.gov/15037685","citation_count":56,"is_preprint":false},{"pmid":"23793458","id":"PMC_23793458","title":"Insights into MLC pathogenesis: GlialCAM is an MLC1 chaperone required for proper activation of volume-regulated anion currents.","date":"2013","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/23793458","citation_count":55,"is_preprint":false},{"pmid":"18757878","id":"PMC_18757878","title":"Molecular pathogenesis of megalencephalic leukoencephalopathy with subcortical cysts: mutations in MLC1 cause folding defects.","date":"2008","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/18757878","citation_count":54,"is_preprint":false},{"pmid":"20926452","id":"PMC_20926452","title":"The beta1 subunit of the Na,K-ATPase pump interacts with megalencephalic leucoencephalopathy with subcortical cysts protein 1 (MLC1) in brain astrocytes: new insights into MLC pathogenesis.","date":"2010","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/20926452","citation_count":54,"is_preprint":false},{"pmid":"21831320","id":"PMC_21831320","title":"Catabolic regulation analysis of Escherichia coli and its crp, mlc, mgsA, pgi and ptsG mutants.","date":"2011","source":"Microbial cell factories","url":"https://pubmed.ncbi.nlm.nih.gov/21831320","citation_count":54,"is_preprint":false},{"pmid":"10464268","id":"PMC_10464268","title":"Purification of Mlc and analysis of its effects on the pts expression in Escherichia coli.","date":"1999","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/10464268","citation_count":53,"is_preprint":false},{"pmid":"27548616","id":"PMC_27548616","title":"Redirecting Specificity of T cells Using the Sleeping Beauty System to Express Chimeric Antigen Receptors by Mix-and-Matching of VL and VH Domains Targeting CD123+ Tumors.","date":"2016","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/27548616","citation_count":52,"is_preprint":false},{"pmid":"17628813","id":"PMC_17628813","title":"MLC1 is associated with the dystrophin-glycoprotein complex at astrocytic endfeet.","date":"2007","source":"Acta neuropathologica","url":"https://pubmed.ncbi.nlm.nih.gov/17628813","citation_count":51,"is_preprint":false},{"pmid":"8419479","id":"PMC_8419479","title":"Role of mouse VH10 and VL gene segments in the specific binding of antibody to Z-DNA, analyzed with recombinant single chain Fv molecules.","date":"1993","source":"Journal of immunology (Baltimore, Md. : 1950)","url":"https://pubmed.ncbi.nlm.nih.gov/8419479","citation_count":51,"is_preprint":false},{"pmid":"32314770","id":"PMC_32314770","title":"Lycium barbarum polysaccharides ameliorate intestinal barrier dysfunction and inflammation through the MLCK-MLC signaling pathway in Caco-2 cells.","date":"2020","source":"Food & function","url":"https://pubmed.ncbi.nlm.nih.gov/32314770","citation_count":50,"is_preprint":false},{"pmid":"14603469","id":"PMC_14603469","title":"The brain-specific protein MLC1 implicated in megalencephalic leukoencephalopathy with subcortical cysts is expressed in glial cells in the murine brain.","date":"2003","source":"Glia","url":"https://pubmed.ncbi.nlm.nih.gov/14603469","citation_count":49,"is_preprint":false},{"pmid":"17434314","id":"PMC_17434314","title":"Expression patterns of MLC1 protein in the central and peripheral nervous systems.","date":"2007","source":"Neurobiology of disease","url":"https://pubmed.ncbi.nlm.nih.gov/17434314","citation_count":48,"is_preprint":false},{"pmid":"25641019","id":"PMC_25641019","title":"Prediction of VH-VL domain orientation for antibody variable domain modeling.","date":"2015","source":"Proteins","url":"https://pubmed.ncbi.nlm.nih.gov/25641019","citation_count":48,"is_preprint":false},{"pmid":"16652334","id":"PMC_16652334","title":"Megalencephalic leukoencephalopathy with subcortical cysts: an update and extended mutation analysis of MLC1.","date":"2006","source":"Human mutation","url":"https://pubmed.ncbi.nlm.nih.gov/16652334","citation_count":47,"is_preprint":false},{"pmid":"26939041","id":"PMC_26939041","title":"Aryl Hydrocarbon Receptor Activation in Intestinal Obstruction Ameliorates Intestinal Barrier Dysfunction Via Suppression of MLCK-MLC Phosphorylation Pathway.","date":"2016","source":"Shock (Augusta, Ga.)","url":"https://pubmed.ncbi.nlm.nih.gov/26939041","citation_count":47,"is_preprint":false},{"pmid":"29228440","id":"PMC_29228440","title":"Metformin regulates tight junction of intestinal epithelial cells via MLCK-MLC signaling pathway.","date":"2017","source":"European review for medical and pharmacological sciences","url":"https://pubmed.ncbi.nlm.nih.gov/29228440","citation_count":46,"is_preprint":false},{"pmid":"31405865","id":"PMC_31405865","title":"The Siderophore Transporter Sit1 Determines Susceptibility to the Antifungal VL-2397.","date":"2019","source":"Antimicrobial agents and chemotherapy","url":"https://pubmed.ncbi.nlm.nih.gov/31405865","citation_count":45,"is_preprint":false},{"pmid":"8964739","id":"PMC_8964739","title":"Interaction between clenbuterol and run training: effects on exercise performance and MLC isoform content.","date":"1996","source":"Journal of applied physiology (Bethesda, Md. : 1985)","url":"https://pubmed.ncbi.nlm.nih.gov/8964739","citation_count":44,"is_preprint":false},{"pmid":"16772557","id":"PMC_16772557","title":"Characterization of a new virulent phage (MLC-A) of Lactobacillus paracasei.","date":"2006","source":"Journal of dairy science","url":"https://pubmed.ncbi.nlm.nih.gov/16772557","citation_count":44,"is_preprint":false},{"pmid":"18165104","id":"PMC_18165104","title":"Biochemical characterization of MLC1 protein in astrocytes and its association with the dystrophin-glycoprotein complex.","date":"2007","source":"Molecular and cellular neurosciences","url":"https://pubmed.ncbi.nlm.nih.gov/18165104","citation_count":42,"is_preprint":false},{"pmid":"18319344","id":"PMC_18319344","title":"Analyses of Mlc-IIBGlc interaction and a plausible molecular mechanism of Mlc inactivation by membrane sequestration.","date":"2008","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/18319344","citation_count":42,"is_preprint":false},{"pmid":"31281722","id":"PMC_31281722","title":"Doxorubicin Promotes Migration and Invasion of Breast Cancer Cells through the Upregulation of the RhoA/MLC Pathway.","date":"2019","source":"Journal of breast cancer","url":"https://pubmed.ncbi.nlm.nih.gov/31281722","citation_count":42,"is_preprint":false},{"pmid":"15992519","id":"PMC_15992519","title":"MLC1 gene is associated with schizophrenia and bipolar disorder in Southern India.","date":"2005","source":"Biological psychiatry","url":"https://pubmed.ncbi.nlm.nih.gov/15992519","citation_count":39,"is_preprint":false},{"pmid":"2109009","id":"PMC_2109009","title":"VH and VL gene usage by murine IgG antibodies that bind autologous insulin.","date":"1990","source":"Journal of immunology (Baltimore, Md. : 1950)","url":"https://pubmed.ncbi.nlm.nih.gov/2109009","citation_count":38,"is_preprint":false},{"pmid":"12973664","id":"PMC_12973664","title":"Clinical and genetic heterogeneity in megalencephalic leukoencephalopathy with subcortical cysts (MLC).","date":"2003","source":"Neuropediatrics","url":"https://pubmed.ncbi.nlm.nih.gov/12973664","citation_count":36,"is_preprint":false},{"pmid":"11024187","id":"PMC_11024187","title":"Amplification of IgG VH and VL (Fab) from single human plasma cells and B cells.","date":"2000","source":"Nucleic acids research","url":"https://pubmed.ncbi.nlm.nih.gov/11024187","citation_count":36,"is_preprint":false},{"pmid":"25883547","id":"PMC_25883547","title":"MLC1 protein: a likely link between leukodystrophies and brain channelopathies.","date":"2015","source":"Frontiers in cellular neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/25883547","citation_count":35,"is_preprint":false},{"pmid":"19931615","id":"PMC_19931615","title":"MLC1 trafficking and membrane expression in astrocytes: role of caveolin-1 and phosphorylation.","date":"2009","source":"Neurobiology of disease","url":"https://pubmed.ncbi.nlm.nih.gov/19931615","citation_count":35,"is_preprint":false},{"pmid":"30076890","id":"PMC_30076890","title":"GlialCAM/MLC1 modulates LRRC8/VRAC currents in an indirect manner: Implications for megalencephalic leukoencephalopathy.","date":"2018","source":"Neurobiology of disease","url":"https://pubmed.ncbi.nlm.nih.gov/30076890","citation_count":35,"is_preprint":false},{"pmid":"29593727","id":"PMC_29593727","title":"Effect of VH-VL Families in Pertuzumab and Trastuzumab Recombinant Production, Her2 and FcγIIA Binding.","date":"2018","source":"Frontiers in immunology","url":"https://pubmed.ncbi.nlm.nih.gov/29593727","citation_count":33,"is_preprint":false},{"pmid":"34965971","id":"PMC_34965971","title":"Mlc1-Expressing Perivascular Astrocytes Promote Blood-Brain Barrier Integrity.","date":"2021","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/34965971","citation_count":32,"is_preprint":false},{"pmid":"29188802","id":"PMC_29188802","title":"The LPI/GPR55 axis enhances human breast cancer cell migration via HBXIP and p-MLC signaling.","date":"2017","source":"Acta pharmacologica Sinica","url":"https://pubmed.ncbi.nlm.nih.gov/29188802","citation_count":32,"is_preprint":false},{"pmid":"33152399","id":"PMC_33152399","title":"MLC tracking for lung SABR is feasible, efficient and delivers high-precision target dose and lower normal tissue dose.","date":"2020","source":"Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology","url":"https://pubmed.ncbi.nlm.nih.gov/33152399","citation_count":32,"is_preprint":false},{"pmid":"36387940","id":"PMC_36387940","title":"GLP-1 RA Improves Diabetic Retinopathy by Protecting the Blood-Retinal Barrier through GLP-1R-ROCK-p-MLC Signaling Pathway.","date":"2022","source":"Journal of diabetes research","url":"https://pubmed.ncbi.nlm.nih.gov/36387940","citation_count":31,"is_preprint":false},{"pmid":"34492423","id":"PMC_34492423","title":"Baicalin attenuates angiotensin II-induced blood pressure elevation and modulates MLCK/p-MLC signaling pathway.","date":"2021","source":"Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie","url":"https://pubmed.ncbi.nlm.nih.gov/34492423","citation_count":28,"is_preprint":false},{"pmid":"30684007","id":"PMC_30684007","title":"Postnatal development of the astrocyte perivascular MLC1/GlialCAM complex defines a temporal window for the gliovascular unit maturation.","date":"2019","source":"Brain structure & function","url":"https://pubmed.ncbi.nlm.nih.gov/30684007","citation_count":28,"is_preprint":false},{"pmid":"28259907","id":"PMC_28259907","title":"O-GlcNAcylation promotes migration and invasion in human ovarian cancer cells via the RhoA/ROCK/MLC pathway.","date":"2017","source":"Molecular medicine reports","url":"https://pubmed.ncbi.nlm.nih.gov/28259907","citation_count":28,"is_preprint":false},{"pmid":"16470554","id":"PMC_16470554","title":"Vacuolating megalencephalic leukoencephalopathy with subcortical cysts: functional studies of novel variants in MLC1.","date":"2006","source":"Human mutation","url":"https://pubmed.ncbi.nlm.nih.gov/16470554","citation_count":28,"is_preprint":false},{"pmid":"29307655","id":"PMC_29307655","title":"RhoA/MLC signaling pathway is involved in Δ⁹-tetrahydrocannabinol-impaired placental angiogenesis.","date":"2018","source":"Toxicology letters","url":"https://pubmed.ncbi.nlm.nih.gov/29307655","citation_count":27,"is_preprint":false},{"pmid":"28509344","id":"PMC_28509344","title":"cGMP signaling inhibits platelet shape change through regulation of the RhoA-Rho Kinase-MLC phosphatase signaling pathway.","date":"2017","source":"Journal of thrombosis and haemostasis : JTH","url":"https://pubmed.ncbi.nlm.nih.gov/28509344","citation_count":27,"is_preprint":false},{"pmid":"2777779","id":"PMC_2777779","title":"Identification of the functional promoter regions in the human gene encoding the myosin alkali light chains MLC1 and MLC3 of fast skeletal muscle.","date":"1989","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/2777779","citation_count":27,"is_preprint":false},{"pmid":"27633759","id":"PMC_27633759","title":"Honokiol inhibits migration of renal cell carcinoma through activation of RhoA/ROCK/MLC signaling pathway.","date":"2016","source":"International journal of oncology","url":"https://pubmed.ncbi.nlm.nih.gov/27633759","citation_count":25,"is_preprint":false},{"pmid":"22561880","id":"PMC_22561880","title":"A new carbon catabolite repression mutation of Escherichia coli, mlc∗, and its use for producing isobutanol.","date":"2012","source":"Journal of bioscience and bioengineering","url":"https://pubmed.ncbi.nlm.nih.gov/22561880","citation_count":25,"is_preprint":false},{"pmid":"31209783","id":"PMC_31209783","title":"Megalencephalic Leukoencephalopathy with Subcortical Cysts Protein-1 (MLC1) Counteracts Astrocyte Activation in Response to Inflammatory Signals.","date":"2019","source":"Molecular neurobiology","url":"https://pubmed.ncbi.nlm.nih.gov/31209783","citation_count":24,"is_preprint":false},{"pmid":"32426460","id":"PMC_32426460","title":"A facile technology for the high-throughput sequencing of the paired VH:VL and TCRβ:TCRα repertoires.","date":"2020","source":"Science advances","url":"https://pubmed.ncbi.nlm.nih.gov/32426460","citation_count":24,"is_preprint":false},{"pmid":"36216996","id":"PMC_36216996","title":"Perlecan Improves Blood Spinal Cord Barrier Repair Through the Integrin β1/ROCK/MLC Pathway After Spinal Cord Injury.","date":"2022","source":"Molecular neurobiology","url":"https://pubmed.ncbi.nlm.nih.gov/36216996","citation_count":24,"is_preprint":false},{"pmid":"17210142","id":"PMC_17210142","title":"MLC1 polymorphisms are specifically associated with periodic catatonia, a subgroup of chronic schizophrenia.","date":"2007","source":"Biological psychiatry","url":"https://pubmed.ncbi.nlm.nih.gov/17210142","citation_count":23,"is_preprint":false},{"pmid":"24561067","id":"PMC_24561067","title":"Megalencephalic leukoencephalopathy with subcortical cysts protein-1 modulates endosomal pH and protein trafficking in astrocytes: relevance to MLC disease pathogenesis.","date":"2014","source":"Neurobiology of disease","url":"https://pubmed.ncbi.nlm.nih.gov/24561067","citation_count":23,"is_preprint":false},{"pmid":"25944844","id":"PMC_25944844","title":"Melatonin Attenuates Aortic Endothelial Permeability and Arteriosclerosis in Streptozotocin-Induced Diabetic Rats: Possible Role of MLCK- and MLCP-Dependent MLC Phosphorylation.","date":"2015","source":"Journal of cardiovascular pharmacology and therapeutics","url":"https://pubmed.ncbi.nlm.nih.gov/25944844","citation_count":23,"is_preprint":false},{"pmid":"32321399","id":"PMC_32321399","title":"An Insight into the Current Perspective and Potential Drug Targets for Visceral Leishmaniasis (VL).","date":"2020","source":"Current drug targets","url":"https://pubmed.ncbi.nlm.nih.gov/32321399","citation_count":22,"is_preprint":false},{"pmid":"32521795","id":"PMC_32521795","title":"Megalencephalic Leukoencephalopathy with Subcortical Cysts Disease-Linked MLC1 Protein Favors Gap-Junction Intercellular Communication by Regulating Connexin 43 Trafficking in Astrocytes.","date":"2020","source":"Cells","url":"https://pubmed.ncbi.nlm.nih.gov/32521795","citation_count":21,"is_preprint":false},{"pmid":"9799259","id":"PMC_9799259","title":"Functions of the Caenorhabditis elegans regulatory myosin light chain genes mlc-1 and mlc-2.","date":"1998","source":"Genetics","url":"https://pubmed.ncbi.nlm.nih.gov/9799259","citation_count":21,"is_preprint":false},{"pmid":"29115372","id":"PMC_29115372","title":"Inhibition of Rho kinase protects against colitis in mice by attenuating intestinal epithelial barrier dysfunction via MLC and the NF-κB pathway.","date":"2017","source":"International journal of molecular medicine","url":"https://pubmed.ncbi.nlm.nih.gov/29115372","citation_count":21,"is_preprint":false},{"pmid":"31888684","id":"PMC_31888684","title":"Plasma membrane localization of MLC1 regulates cellular morphology and motility.","date":"2019","source":"Molecular brain","url":"https://pubmed.ncbi.nlm.nih.gov/31888684","citation_count":20,"is_preprint":false},{"pmid":"19120700","id":"PMC_19120700","title":"The potential role of MLC phosphatase and MAPK signalling in the pathogenesis of vascular dysfunction in heart failure.","date":"2008","source":"Journal of cellular and molecular medicine","url":"https://pubmed.ncbi.nlm.nih.gov/19120700","citation_count":20,"is_preprint":false},{"pmid":"26033718","id":"PMC_26033718","title":"Structural determinants of interaction, trafficking and function in the ClC-2/MLC1 subunit GlialCAM involved in leukodystrophy.","date":"2015","source":"The Journal of physiology","url":"https://pubmed.ncbi.nlm.nih.gov/26033718","citation_count":20,"is_preprint":false},{"pmid":"37049598","id":"PMC_37049598","title":"Heat-Killed Lacticaseibacillus paracasei Repairs Lipopolysaccharide-Induced Intestinal Epithelial Barrier Damage via MLCK/MLC Pathway Activation.","date":"2023","source":"Nutrients","url":"https://pubmed.ncbi.nlm.nih.gov/37049598","citation_count":20,"is_preprint":false},{"pmid":"12497630","id":"PMC_12497630","title":"Sequence diversity of KIAA0027/MLC1: are megalencephalic leukoencephalopathy and schizophrenia allelic disorders?","date":"2003","source":"Human mutation","url":"https://pubmed.ncbi.nlm.nih.gov/12497630","citation_count":19,"is_preprint":false},{"pmid":"29574897","id":"PMC_29574897","title":"IL-6 increases podocyte motility via MLC-mediated focal adhesion impairment and cytoskeleton disassembly.","date":"2018","source":"Journal of cellular physiology","url":"https://pubmed.ncbi.nlm.nih.gov/29574897","citation_count":19,"is_preprint":false},{"pmid":"23571382","id":"PMC_23571382","title":"DEK depletion negatively regulates Rho/ROCK/MLC pathway in non-small cell lung cancer.","date":"2013","source":"The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society","url":"https://pubmed.ncbi.nlm.nih.gov/23571382","citation_count":18,"is_preprint":false},{"pmid":"33692204","id":"PMC_33692204","title":"Porcine Sapovirus-Induced Tight Junction Dissociation via Activation of RhoA/ROCK/MLC Signaling Pathway.","date":"2021","source":"Journal of virology","url":"https://pubmed.ncbi.nlm.nih.gov/33692204","citation_count":18,"is_preprint":false},{"pmid":"8900048","id":"PMC_8900048","title":"Modular elements of the MLC 1f/3f locus confer fiber-specific transcription regulation in transgenic mice.","date":"1996","source":"Developmental genetics","url":"https://pubmed.ncbi.nlm.nih.gov/8900048","citation_count":18,"is_preprint":false},{"pmid":"30110643","id":"PMC_30110643","title":"The C. elegans BRCA2-ALP/Enigma Complex Regulates Axon Regeneration via a Rho GTPase-ROCK-MLC Phosphorylation Pathway.","date":"2018","source":"Cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/30110643","citation_count":17,"is_preprint":false},{"pmid":"11042491","id":"PMC_11042491","title":"Expression, refolding, and ferritin-binding activity of the isolated VL-domain of monoclonal antibody F11.","date":"2000","source":"Biochemistry. Biokhimiia","url":"https://pubmed.ncbi.nlm.nih.gov/11042491","citation_count":16,"is_preprint":false},{"pmid":"3155463","id":"PMC_3155463","title":"Suppression of human NK cell cytotoxicity by an MLC-Generated cell population.","date":"1985","source":"Journal of immunology (Baltimore, Md. : 1950)","url":"https://pubmed.ncbi.nlm.nih.gov/3155463","citation_count":16,"is_preprint":false},{"pmid":"36078064","id":"PMC_36078064","title":"The CaMKII/MLC1 Axis Confers Ca2+-Dependence to Volume-Regulated Anion Channels (VRAC) in Astrocytes.","date":"2022","source":"Cells","url":"https://pubmed.ncbi.nlm.nih.gov/36078064","citation_count":15,"is_preprint":false},{"pmid":"33040087","id":"PMC_33040087","title":"Megalencephalic leukoencephalopathy with subcortical cysts 1 (MLC1) promotes glioblastoma cell invasion in the brain microenvironment.","date":"2020","source":"Oncogene","url":"https://pubmed.ncbi.nlm.nih.gov/33040087","citation_count":15,"is_preprint":false},{"pmid":"8355600","id":"PMC_8355600","title":"Conservation of alternative splicing and genomic organization of the myosin alkali light-chain (Mlc1) gene among Drosophila species.","date":"1993","source":"Molecular biology and evolution","url":"https://pubmed.ncbi.nlm.nih.gov/8355600","citation_count":15,"is_preprint":false},{"pmid":"33935610","id":"PMC_33935610","title":"Designing of a Novel Fusion Protein Vaccine Candidate Against Human Visceral Leishmaniasis (VL) Using Immunoinformatics and Structural Approaches.","date":"2021","source":"International journal of peptide research and therapeutics","url":"https://pubmed.ncbi.nlm.nih.gov/33935610","citation_count":15,"is_preprint":false},{"pmid":"32021088","id":"PMC_32021088","title":"NMMHC IIA Inhibition Ameliorates Cerebral Ischemic/Reperfusion-Induced Neuronal Apoptosis Through Caspase-3/ROCK1/MLC Pathway.","date":"2020","source":"Drug design, development and therapy","url":"https://pubmed.ncbi.nlm.nih.gov/32021088","citation_count":15,"is_preprint":false},{"pmid":"37951955","id":"PMC_37951955","title":"Inhibition of UTX/KDM6A improves recovery of spinal cord injury by attenuating BSCB permeability and macrophage infiltration through the MLCK/p-MLC pathway.","date":"2023","source":"Journal of neuroinflammation","url":"https://pubmed.ncbi.nlm.nih.gov/37951955","citation_count":14,"is_preprint":false},{"pmid":"37211627","id":"PMC_37211627","title":"Gastrodin attenuates angiotensin II-induced vascular contraction and MLCK/p-MLC2 pathway activation.","date":"2023","source":"Pharmaceutical biology","url":"https://pubmed.ncbi.nlm.nih.gov/37211627","citation_count":14,"is_preprint":false},{"pmid":"12083776","id":"PMC_12083776","title":"An extra human chromosome 21 reduces mlc-2a expression in chimeric mice and Down syndrome.","date":"2002","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/12083776","citation_count":14,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":51553,"output_tokens":6140,"usd":0.12338,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":14813,"output_tokens":5017,"usd":0.099745,"stage2_stop_reason":"end_turn"},"total_usd":0.223125,"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\": 2001,\n      \"finding\": \"Mutations in MLC1 (KIAA0027), which encodes a putative membrane protein with eight predicted transmembrane domains, cause megalencephalic leukoencephalopathy with subcortical cysts (MLC). Twelve different mutations were identified including frameshifts, splice-acceptor mutations, and amino acid substitutions in predicted transmembrane domains.\",\n      \"method\": \"Linkage analysis, mutation screening of candidate gene in affected families\",\n      \"journal\": \"American journal of human genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple families, multiple mutation types, replicated across labs; foundational disease-gene identification paper\",\n      \"pmids\": [\"11254442\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"MLC1 protein is specifically localized in distal astroglial processes in perivascular, subependymal, and subpial regions of the brain, and contains an even number of transmembrane domains (consistent with a transport function). Immunohistochemistry and assembly-dependent trafficking assays confirmed plasma membrane localization.\",\n      \"method\": \"Immunohistochemistry, in situ hybridization, topology/assembly assays with polyclonal antibodies\",\n      \"journal\": \"Journal of neuropathology and experimental neurology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (IHC, ISH, biochemical topology assays), replicated localization finding\",\n      \"pmids\": [\"15892299\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"MLC1 is assembled into higher molecular complexes at the plasma membrane, and disease-causing MLC1 mutations impair protein folding/trafficking; this folding defect can be corrected in vitro by curcumin (a Ca2+-ATPase inhibitor). MLC1 is expressed in neurons and astrocytes, with localization at astrocyte end-feet membranes adjacent to blood vessels and at astrocyte-astrocyte contact regions.\",\n      \"method\": \"Immunohistochemistry, in situ hybridization, assembly-dependent trafficking assays, pharmacological rescue with curcumin\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods including biochemical trafficking assays and pharmacological rescue in a single rigorous study\",\n      \"pmids\": [\"15367490\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"MLC1 is directly associated with the dystrophin-glycoprotein complex (DGC) at astrocytic endfeet, and a direct protein interaction between MLC1 and Kir4.1 was demonstrated by immunoprecipitation. In MLC brain tissue, absence of MLC1 correlates with altered expression of several DGC proteins.\",\n      \"method\": \"Immunohistochemistry, co-localization, immunoprecipitation\",\n      \"journal\": \"Acta neuropathologica\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — direct co-IP for MLC1-Kir4.1 interaction, supported by co-localization in multiple tissue contexts\",\n      \"pmids\": [\"17628813\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"MLC1 membrane-associated component (60-64 kDa) localizes in astrocytic lipid rafts together with dystroglycan, syntrophin, and caveolin-1, and co-fractionates with the DGC in whole rat brain tissue. In human brain, MLC1 co-localizes with dystroglycan and syntrophin in astrocyte processes and ependymal cells.\",\n      \"method\": \"Lipid raft fractionation, co-fractionation assays, immunofluorescence, polyclonal antibody characterization\",\n      \"journal\": \"Molecular and cellular neurosciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-fractionation and localization with multiple orthogonal approaches, single lab\",\n      \"pmids\": [\"18165104\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Most disease-causing MLC1 missense mutations dramatically reduce total and plasma membrane MLC1 expression levels, due to increased ER-associated degradation and endo-lysosomal-associated degradation. The expression defect of mutant MLC1 proteins can be rescued by low temperature and glycerol (chemical chaperone), placing MLC in the class of conformational diseases.\",\n      \"method\": \"Xenopus oocyte expression, mammalian cell expression, primary rat astrocyte and human monocyte cultures, pharmacological rescue assays, biochemical/imaging methods\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple cell systems (oocytes, mammalian cells, primary cultures), multiple orthogonal methods (biochemical, pharmacological, imaging), single lab with comprehensive validation\",\n      \"pmids\": [\"18757878\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"MLC1 intracellular domains interact with DGC proteins syntrophin, dystrobrevin, Kir4.1, and caveolin-1 (pull-down assays). MLC1 is expressed in intracellular vesicles and ER and undergoes caveolae/raft-mediated endocytosis. Inhibition of endocytosis and PKA/PKC-mediated MLC1 phosphorylation favor membrane-associated MLC1 expression.\",\n      \"method\": \"Pull-down assays, co-fractionation, immunostaining, subcellular fractionation, pharmacological modulation of caveolin-mediated trafficking\",\n      \"journal\": \"Neurobiology of disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pull-down plus subcellular fractionation plus pharmacological evidence, single lab\",\n      \"pmids\": [\"19931615\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"The β1 subunit of the Na,K-ATPase pump directly interacts with MLC1 in brain astrocytes, identified by yeast two-hybrid screening with the NH2-MLC1 domain as bait, confirmed by pull-downs, co-fractionation, and immunofluorescence. MLC1 was isolated in a multiprotein complex with Na,K-ATPase, Kir4.1, syntrophin, and dystrobrevin by ouabain-affinity chromatography. Hypo-osmotic conditions increase MLC1 membrane expression and favor MLC1/Na,K-ATPase-β1 association, suggesting MLC1 is involved in osmotic control and volume regulation.\",\n      \"method\": \"Yeast two-hybrid, pull-down, co-fractionation, immunofluorescence, ouabain-affinity chromatography, hypo-osmotic stress experiments\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — yeast two-hybrid plus multiple orthogonal biochemical confirmations, functional linkage to osmotic stress\",\n      \"pmids\": [\"20926452\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Knockdown of MLC1 in primary rat astrocytes results in the appearance of intracellular vacuoles, which is reversed by co-expression of human MLC1. MLC1 localization in cell-cell contacts depends on the actin cytoskeleton (disrupted by actin-modifying agents but not by disruption of microtubules or GFAP). MLC1 and ZO-1 co-localize and co-immunoprecipitate specifically in human tissues.\",\n      \"method\": \"siRNA knockdown, rescue by human MLC1 re-expression, co-immunoprecipitation, actin/microtubule disruption assays, EM immunostaining\",\n      \"journal\": \"Neurobiology of disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — loss-of-function with specific phenotypic readout (vacuolation) and rescue, plus orthogonal co-IP and cytoskeletal dependency assays\",\n      \"pmids\": [\"21440627\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"MLC1 and GlialCAM form homo- and hetero-complexes. MLC-causing mutations in GLIALCAM primarily reduce formation of GlialCAM homo-complexes, impairing trafficking of GlialCAM to cell junctions and thereby also affecting MLC1 trafficking. The S69L MLC1 missense mutation reduces MLC1 protein stability and levels in brain to almost undetectable, while GlialCAM expression and localization are largely unaffected by loss of MLC1.\",\n      \"method\": \"Human post-mortem brain analysis, in vitro primary astrocyte and heterologous cell experiments, co-immunoprecipitation, biochemical stability assays\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — human tissue plus in vitro validation, multiple orthogonal methods establishing complex formation and trafficking hierarchy\",\n      \"pmids\": [\"21624973\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"GlialCAM acts as a chaperone for MLC1: GlialCAM ablation causes intracellular accumulation and reduced plasma membrane expression of MLC1. GlialCAM over-expression rescues stability of mutant MLC1 variants. Reduction in GlialCAM expression results in defective activation of volume-regulated anion currents (VRAC) and increased vacuolation, phenocopying MLC1 mutations. Over-expression of GlialCAM together with MLC1 containing MLC-related mutations can reactivate VRAC currents and reverse vacuolation.\",\n      \"method\": \"Gain- and loss-of-function of GlialCAM in HeLa cells and primary astrocytes, electrophysiology (VRAC currents), vacuolation assays, biochemical stability assays\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (electrophysiology, biochemistry, cell biology), gain- and loss-of-function with defined functional readouts\",\n      \"pmids\": [\"23793458\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"In GlialCAM and Mlc1 loss-of-function mouse models with myelin vacuolization: GlialCAM is important for targeting MLC1 and ClC-2 to specialized glial domains in vivo and for modifying ClC-2 biophysical properties in oligodendrocytes. MLC1 is crucial for proper localization of GlialCAM and ClC-2 and for modifying ClC-2 currents. ClC-2 is not necessary for MLC1 and GlialCAM localization. This reveals an MLC1–GlialCAM–ClC-2 functional relationship in vivo.\",\n      \"method\": \"Knock-out mouse models (Glialcam and Mlc1), electrophysiology (ClC-2 biophysical characterization), immunofluorescence localization in brain\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo KO models with electrophysiology and localization, epistasis established between MLC1, GlialCAM, and ClC-2\",\n      \"pmids\": [\"24647135\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"MLC1 modulates endosomal pH and protein trafficking in astrocytes: wild-type MLC1 limits early endosomal acidification and stimulates protein recycling (transferrin recycling assay). MLC1 is abundantly expressed in early (EEA1+, Rab5+) and recycling (Rab11+) endosomes and traffics to the plasma membrane via recycling endosomes during hypo-osmotic stress. MLC1 also favors recycling of TRPV4 cation channel to the plasma membrane, which cooperates with MLC1 to activate calcium influx during hypo-osmotic stress. All disease-causing MLC1 mutations fail to influence endosomal pH and protein recycling.\",\n      \"method\": \"Biochemical, proteomic, and imaging analyses; FITC-dextran pH measurement; transferrin recycling assay; endosome marker co-localization; hypo-osmotic stress experiments in astrocytoma cells\",\n      \"journal\": \"Neurobiology of disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal functional assays (pH measurement, recycling assay, channel localization) with mutant controls\",\n      \"pmids\": [\"24561067\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"The extracellular domain of GlialCAM is necessary for targeting to cell junctions and for interactions with itself, MLC1, and ClC-2. The C-terminus of GlialCAM is required for junction targeting but not for biochemical interaction. The first three residues of the GlialCAM transmembrane segment are required for GlialCAM-mediated ClC-2 activation but not for targeting or interaction with MLC1.\",\n      \"method\": \"Mutagenesis, functional electrophysiology, biochemical interaction assays (co-immunoprecipitation), cell junction targeting assays\",\n      \"journal\": \"The Journal of physiology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — mutagenesis combined with functional electrophysiology and biochemical interaction assays in a single study\",\n      \"pmids\": [\"26033718\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"MLC1 and LRRC8A (main subunit of VRAC) are functionally linked: MLC1 cannot potentiate VRAC currents when LRRC8A is knocked down. However, LRRC8A and MLC1 do not co-localize or interact directly, and MLC1 does not potentiate LRRC8-mediated VRAC currents in Xenopus oocytes, indicating VRAC modulation by MLC1 is indirect. MLC1 overexpression decreases ERK phosphorylation; loss of MLC1 increases ERK phosphorylation. Changes in MLC1 levels alter phosphorylation state of VRAC subunit LRRC8C.\",\n      \"method\": \"LRRC8A knockdown, VRAC electrophysiology in astrocytes and Xenopus oocytes, co-localization/co-immunoprecipitation (negative for direct interaction), ERK phosphorylation assays, LRRC8C phosphorylation assays\",\n      \"journal\": \"Neurobiology of disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods, positive and negative controls, Xenopus oocyte system separating direct vs. indirect effects\",\n      \"pmids\": [\"30076890\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Wild-type MLC1 plasma membrane localization is critical for actin dynamics: MLC1 overexpression induces filopodia formation and suppresses cell motility. Knockdown of Mlc1 induces Arp3-Cortactin interaction, lamellipodia formation, and increased membrane ruffling in astrocytes, implicating MLC1 in regulation of actin remodeling via the ARP2/3 complex. Patient-derived MLC1 mutants are trapped in the ER and do not affect morphology or motility.\",\n      \"method\": \"Confocal and live cell imaging, RNAi knockdown, co-immunoprecipitation, surface biotinylation, overexpression of wild-type and mutant MLC1\",\n      \"journal\": \"Molecular brain\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — live imaging with biochemical support, single lab with multiple approaches\",\n      \"pmids\": [\"31888684\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"MLC1 inhibits astrocyte activation by down-regulating IL-1β-induced inflammatory signals (pERK, pNF-κB). IL-1β stimulates wild-type MLC1 plasma membrane expression. Wild-type MLC1 expression reduces levels of astrogliosis marker pSTAT3. MLC1 is upregulated in demyelinating/remyelinating cerebellar organotypic cultures during recovery phases, suggesting MLC1 contributes to restoring astrocyte homeostasis after inflammation.\",\n      \"method\": \"Human brain tissue analysis (MS, Alzheimer's, CJD), astrocytoma lines overexpressing WT or mutant MLC1, primary astrocytes from control and Mlc1 KO mice, IL-1β stimulation, western blot for pERK/pNF-kB/pSTAT3, cerebellar organotypic culture model\",\n      \"journal\": \"Molecular neurobiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple cell models and human tissue, KO astrocytes and overexpression, single lab\",\n      \"pmids\": [\"31209783\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Wild-type MLC1 expression favors gap junction intercellular communication by inhibiting ERK1/2-mediated Cx43 phosphorylation and increasing Cx43 gap-junction stability in astrocytes. Mutant MLC1 fails to regulate Cx43. This was shown using biochemical and electrophysiological techniques in astrocytoma cells.\",\n      \"method\": \"Biochemical assays (co-immunoprecipitation, western blot for phospho-Cx43), electrophysiology (gap junction conductance), overexpression of wild-type vs. pathological mutant MLC1\",\n      \"journal\": \"Cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — electrophysiology plus biochemistry, mutant controls, single lab\",\n      \"pmids\": [\"32521795\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Genetic inhibition of MLC1 in glioblastoma stem-like cells (GSCs) using RNAi results in diminished growth and invasion in vitro and impaired tumor initiation and progression in vivo. Biochemical assays identify the receptor tyrosine kinase Axl and its intracellular signaling effectors as important downstream mediators of MLC1-controlled invasive growth.\",\n      \"method\": \"RNAi-mediated gene silencing in GSCs, in vitro growth/invasion assays, in vivo tumor initiation model, biochemical assays for Axl signaling\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function with in vitro and in vivo phenotype plus biochemical pathway placement, single lab\",\n      \"pmids\": [\"33040087\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Ablation of Mlc1-expressing perivascular astrocytes (PAs) using a Mlc1-T2A-CreERT2 knock-in mouse causes severe defects in blood-brain barrier (BBB) integrity, resulting in premature death. PA loss causes aberrant localization of Claudin-5 and VE-Cadherin in endothelial cell junctions and robust microgliosis, demonstrating that Mlc1-expressing PAs are essential for endothelial barrier integrity.\",\n      \"method\": \"Mlc1-T2A-CreERT2 knock-in mouse model, conditional PA ablation, immunofluorescence for tight junction proteins (Claudin-5, VE-Cadherin), BBB integrity assays, histology\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo conditional cell ablation with specific molecular and functional readouts (endothelial junction proteins, BBB permeability, survival)\",\n      \"pmids\": [\"34965971\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"MLC1 and GlialCAM are enriched and assembled into mature complexes in astrocyte perivascular endfeet between postnatal days 10 and 15, after Aquaporin 4 formation, correlating with increased expression of BBB components Claudin-5 and P-gP. This was established using purified gliovascular units from postnatal mouse brain.\",\n      \"method\": \"Purified gliovascular units, western blot, immunofluorescence across postnatal timepoints\",\n      \"journal\": \"Brain structure & function\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct biochemical fractionation of gliovascular units with temporal resolution, single lab\",\n      \"pmids\": [\"30684007\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"MLC1 is a substrate of Ca2+/Calmodulin-dependent protein kinase II (CaMKII): MLC1 phosphorylation by CaMKII occurs in response to intracellular Ca2+ release and potentiates VRAC-mediated chloride currents (ICl,swell) in astrocytes. This links volume regulation to Ca2+ signaling via CaMKII-MLC1 axis.\",\n      \"method\": \"Molecular, biochemical, proteomic, electrophysiological, and imaging techniques; CaMKII inhibition/activation; Ca2+ imaging; VRAC current measurement\",\n      \"journal\": \"Cells\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — identified writer (CaMKII), PTM (phosphorylation), and functional consequence (VRAC potentiation) using multiple orthogonal methods including electrophysiology, single lab\",\n      \"pmids\": [\"36078064\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"MLC1 is an eight-transmembrane astrocytic membrane protein that localizes to perivascular endfeet and astrocyte-astrocyte junctions, where it forms hetero- and homo-complexes with GlialCAM (which acts as its chaperone for plasma membrane targeting) and associates with the dystrophin-glycoprotein complex (including Kir4.1, syntrophin, dystrobrevin), Na,K-ATPase-β1, and ZO-1; it undergoes CaMKII-mediated phosphorylation in response to intracellular Ca2+ release to potentiate volume-regulated anion channel (VRAC/LRRC8) currents indirectly via ERK/LRRC8C phosphorylation, modulates endosomal pH and protein recycling (including TRPV4), regulates Connexin-43 gap junction stability by inhibiting ERK1/2-mediated Cx43 phosphorylation, and controls actin remodeling via the ARP2/3 complex; disease-causing mutations cause protein misfolding and ER retention leading to loss of these functions, with Mlc1-expressing perivascular astrocytes being essential for blood-brain barrier integrity in vivo.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"MLC1 is an eight-transmembrane astrocytic membrane protein that localizes to distal astroglial processes at perivascular, subependymal, and subpial endfeet and to astrocyte-astrocyte contacts, where it organizes osmotic and volume-regulatory signaling [#0, #1, #2]. At the plasma membrane MLC1 assembles into higher-order complexes with the dystrophin-glycoprotein complex (DGC), interacting directly with Kir4.1, syntrophin, dystrobrevin, and caveolin-1, and partitioning into astrocytic lipid rafts [#3, #4, #6]; it also binds the Na,K-ATPase \\u03b21 subunit, an association favored under hypo-osmotic stress that links MLC1 to cell volume control [#7]. GlialCAM serves as the obligate chaperone that traffics MLC1 to cell junctions, and the two form homo- and hetero-complexes that, together with the ClC-2 chloride channel, constitute a functional MLC1\\u2013GlialCAM\\u2013ClC-2 unit required for proper glial-domain targeting in vivo [#9, #10, #11]. Functionally, MLC1 controls cell volume and osmotic homeostasis: it potentiates volume-regulated anion currents (VRAC/LRRC8) indirectly\\u2014without binding LRRC8A\\u2014by modulating ERK and LRRC8C phosphorylation, and is itself a CaMKII substrate phosphorylated upon intracellular Ca2+ release to potentiate ICl,swell [#10, #14, #21]. MLC1 additionally limits endosomal acidification and promotes recycling of itself and the TRPV4 channel, regulates actin remodeling through the ARP2/3 complex, stabilizes Connexin-43 gap junctions by inhibiting ERK1/2-mediated Cx43 phosphorylation, and dampens IL-1\\u03b2-driven inflammatory signaling [#12, #15, #16, #17]. Disease-causing MLC1 mutations cause protein misfolding, ER retention, and enhanced degradation, abolishing these functions, and MLC1 mutations cause megalencephalic leukoencephalopathy with subcortical cysts; in vivo, Mlc1-expressing perivascular astrocytes are essential for blood-brain barrier integrity [#0, #5, #19].\",\n  \"teleology\": [\n    {\n      \"year\": 2001,\n      \"claim\": \"Established MLC1 as a disease gene, defining the question of what cellular function a predicted eight-transmembrane protein performs whose loss causes leukoencephalopathy.\",\n      \"evidence\": \"Linkage analysis and mutation screening in MLC families\",\n      \"pmids\": [\"11254442\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Protein function and subcellular role unknown\", \"No localization or interaction data\", \"Topology only predicted\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Localized MLC1 to distal astroglial processes at perivascular, subependymal, and subpial regions, placing the protein at glial membrane interfaces and supporting a transport-related role from its even transmembrane count.\",\n      \"evidence\": \"Immunohistochemistry, in situ hybridization, and biochemical topology assays in brain\",\n      \"pmids\": [\"15892299\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No transported substrate identified\", \"Binding partners unknown\", \"Functional consequence of localization untested\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Showed MLC1 assembles into plasma-membrane complexes and that disease mutations are folding/trafficking defects, framing MLC as a conformational disease amenable to chemical rescue.\",\n      \"evidence\": \"Assembly-dependent trafficking assays and pharmacological rescue with curcumin\",\n      \"pmids\": [\"15367490\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of complex partners not defined\", \"Mechanism of curcumin rescue unclear\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Identified the dystrophin-glycoprotein complex as MLC1's molecular environment, with a direct MLC1-Kir4.1 interaction, connecting MLC1 to potassium and water homeostasis machinery at endfeet.\",\n      \"evidence\": \"Co-localization and immunoprecipitation in human brain tissue (idx 3); lipid-raft co-fractionation with dystroglycan, syntrophin, caveolin-1 (idx 4)\",\n      \"pmids\": [\"17628813\", \"18165104\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs. complex-mediated interactions not fully separated\", \"Functional consequence of DGC association untested\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Defined the molecular basis of pathogenic missense mutations as enhanced ER-associated and endo-lysosomal degradation, confirming MLC as a conformational disease rescuable by chaperone-like conditions.\",\n      \"evidence\": \"Expression in oocytes, mammalian cells, and primary cultures with low-temperature/glycerol rescue\",\n      \"pmids\": [\"18757878\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Does not establish lost downstream function\", \"Rescue not validated in vivo\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Connected MLC1 to volume regulation by identifying a direct Na,K-ATPase-\\u03b21 interaction and showing hypo-osmotic stress drives MLC1 membrane recruitment and complex assembly.\",\n      \"evidence\": \"Yeast two-hybrid, pull-down, ouabain-affinity chromatography, hypo-osmotic stress in astrocytes\",\n      \"pmids\": [\"20926452\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism linking complex to volume sensing not resolved\", \"Ion-transport activity not directly demonstrated\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Demonstrated MLC1 loss-of-function causes intracellular vacuolation reversible by re-expression, and that membrane localization at junctions depends on the actin cytoskeleton and ZO-1, linking MLC1 to junctional architecture.\",\n      \"evidence\": \"siRNA knockdown with rescue, co-IP with ZO-1, cytoskeletal disruption assays (idx 8); GlialCAM homo/hetero-complex and trafficking hierarchy (idx 9)\",\n      \"pmids\": [\"21440627\", \"21624973\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cause of vacuolation mechanism unclear\", \"Functional readout of ZO-1 interaction undefined\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Established GlialCAM as the chaperone required for MLC1 plasma-membrane targeting and VRAC activation, providing a unifying explanation for why GLIALCAM and MLC1 mutations phenocopy each other.\",\n      \"evidence\": \"Gain/loss-of-function of GlialCAM in HeLa and astrocytes with VRAC electrophysiology and vacuolation assays\",\n      \"pmids\": [\"23793458\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of VRAC potentiation not yet defined\", \"Direct vs. indirect channel coupling unresolved\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Defined the in vivo MLC1\\u2013GlialCAM\\u2013ClC-2 functional axis and showed MLC1 modulates endosomal pH and recycling of itself and TRPV4, establishing roles in chloride channel regulation and endosomal protein trafficking.\",\n      \"evidence\": \"Glialcam and Mlc1 KO mice with ClC-2 electrophysiology (idx 11); endosomal pH, transferrin and TRPV4 recycling assays with mutant controls (idx 12)\",\n      \"pmids\": [\"24647135\", \"24561067\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How MLC1 sets endosomal pH mechanistically unknown\", \"ClC-2 modulation mechanism not molecularly defined\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Mapped the GlialCAM domains required for junction targeting, MLC1/ClC-2 interaction, and ClC-2 activation, separating the structural determinants of complex assembly from channel modulation.\",\n      \"evidence\": \"Mutagenesis with electrophysiology and biochemical interaction assays\",\n      \"pmids\": [\"26033718\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Corresponding MLC1 interaction determinants not mapped\", \"Structural model absent\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Resolved that MLC1 potentiates VRAC indirectly through ERK signaling and LRRC8C phosphorylation rather than by binding LRRC8A, clarifying the signaling logic of MLC1's volume-regulatory effect.\",\n      \"evidence\": \"LRRC8A knockdown, VRAC electrophysiology in astrocytes and oocytes, ERK and LRRC8C phosphorylation assays\",\n      \"pmids\": [\"30076890\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How MLC1 controls ERK activity mechanistically unknown\", \"Kinase acting on LRRC8C not defined\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Extended MLC1 function to actin remodeling via ARP2/3, anti-inflammatory regulation of astrocyte activation, and developmental assembly of perivascular complexes coincident with BBB maturation.\",\n      \"evidence\": \"Imaging/RNAi of actin dynamics and Arp3-Cortactin (idx 15); IL-1\\u03b2 stimulation and pERK/pNF-\\u03baB/pSTAT3 assays (idx 16); gliovascular unit fractionation across postnatal timepoints (idx 20)\",\n      \"pmids\": [\"31888684\", \"31209783\", \"30684007\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs. signaling-mediated actin effects unresolved\", \"Anti-inflammatory mechanism not molecularly defined\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Showed MLC1 stabilizes Cx43 gap junctions by inhibiting ERK1/2-mediated Cx43 phosphorylation and that MLC1 drives glioblastoma stem-cell invasion via Axl signaling, broadening its roles to intercellular communication and tumor biology.\",\n      \"evidence\": \"Co-IP, phospho-Cx43 western blot, gap-junction electrophysiology (idx 17); RNAi in GSCs with in vitro/in vivo invasion assays and Axl pathway analysis (idx 18)\",\n      \"pmids\": [\"32521795\", \"33040087\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism by which MLC1 suppresses ERK not defined\", \"Direct link between MLC1 and Axl not established\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Demonstrated in vivo that Mlc1-expressing perivascular astrocytes are essential for blood-brain barrier integrity, connecting the cell type defined by MLC1 to endothelial junction maintenance.\",\n      \"evidence\": \"Mlc1-T2A-CreERT2 conditional astrocyte ablation with Claudin-5/VE-Cadherin imaging and BBB integrity assays\",\n      \"pmids\": [\"34965971\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Does not isolate MLC1 protein function from astrocyte presence\", \"Molecular signal to endothelium unknown\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Identified CaMKII as the kinase that phosphorylates MLC1 upon intracellular Ca2+ release to potentiate swelling-activated chloride currents, defining a Ca2+-CaMKII-MLC1 axis coupling Ca2+ signaling to volume regulation.\",\n      \"evidence\": \"CaMKII inhibition/activation, Ca2+ imaging, and VRAC current measurement in astrocytes\",\n      \"pmids\": [\"36078064\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Phosphorylation site(s) not mapped\", \"How phosphorylation alters MLC1 activity unknown\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The primary biochemical activity of MLC1\\u2014whether it transports ions/solutes itself or acts purely as a scaffold/regulator\\u2014remains undefined, as does the structural basis for its assembly with GlialCAM and the DGC.\",\n      \"evidence\": \"No discovery in the timeline demonstrates direct transport activity or provides a structural model\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No demonstrated direct transport function\", \"No high-resolution structure of MLC1 or its complexes\", \"Phosphosite-level mechanism of regulation unresolved\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [10, 14, 17, 21]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [3, 7, 8]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [1, 2, 5, 7]},\n      {\"term_id\": \"GO:0005768\", \"supporting_discovery_ids\": [6, 12]},\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [5, 6, 15]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-382551\", \"supporting_discovery_ids\": [7, 10, 12]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [14, 17, 21]}\n    ],\n    \"complexes\": [\"dystrophin-glycoprotein complex\", \"MLC1-GlialCAM-ClC-2 complex\", \"Na,K-ATPase complex\"],\n    \"partners\": [\"GLIALCAM\", \"Kir4.1\", \"syntrophin\", \"dystrobrevin\", \"caveolin-1\", \"ATP1B1\", \"ZO-1\", \"CLCN2\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}