| 2007 |
SORL1/SorLA directs trafficking of APP into recycling pathways; when SORL1 is underexpressed, APP is sorted into Aβ-generating compartments, establishing SORL1 as a regulator of APP intracellular trafficking and amyloidogenic processing. |
Cell-based overexpression/knockdown with APP trafficking and Aβ production assays |
Nature genetics |
High |
17220890
|
| 2001 |
SorLA/LR11 is synthesized as a proreceptor cleaved by furin in late Golgi compartments, activating the Vps10p domain for ligand binding; the receptor binds neuropeptides, receptor-associated protein, apolipoprotein E, and lipoprotein lipase, and mediates endocytosis from the cell surface while the major pool resides in late Golgi compartments. |
Furin cleavage assays, ligand binding assays, cell transfection, subcellular fractionation |
The Journal of biological chemistry |
High |
11294867
|
| 2002 |
The cytoplasmic tail of SorLA binds GGA1 and GGA2 adaptor proteins via a novel motif (ψ-ψ-X-X-φ) in the C-terminal segment, supporting a role for SorLA in Golgi-to-endosome sorting. |
Co-immunoprecipitation, pulldown assays, mutagenesis of cytoplasmic tail residues |
FEBS letters |
High |
11821067
|
| 2006 |
The SorLA/APP interaction is mediated by the cluster of complement-type repeats (CR cluster) in SorLA forming a 1:1 stoichiometric complex with the carbohydrate-linked domain of APP, resulting in APP sequestration in the Golgi and protection from amyloidogenic processing. |
FRET-based proximity assay, surface plasmon resonance, analytical ultracentrifugation of recombinant protein fragments |
Biochemistry |
High |
16489755
|
| 2007 |
SorLA cytoplasmic tail mediates Golgi-to-endosome transport via an acidic cluster-dileucine-like motif and a GGA-binding site; AP-1 adaptor complex is essential for SorLA transport between Golgi membranes and endosomes; SNX1 and Vps35 (retromer) are involved in retraction of SorLA from endosomes. |
Chimeric receptor trafficking assays, AP-1 μ1-chain-deficient cell experiments, co-immunoprecipitation |
Molecular and cellular biology |
High |
17646382
|
| 2006 |
SorLA is a substrate for presenilin-dependent γ-secretase cleavage, preceded by metalloprotease-dependent ectodomain shedding (α-secretase-like cleavage), analogous to other γ-secretase substrates. |
γ-secretase inhibitor treatment, PS1/PS2 knockout cells, metalloprotease inhibitor, PMA stimulation |
Molecular neurodegeneration |
High |
16930450
|
| 2000 |
SorLA undergoes ectodomain shedding by a metalloprotease to release a soluble form; head activator (HA) stimulates SorLA translocation from internal membranes to the cell surface, its internalization, ectodomain shedding, and synthesis; blockade of shedding decreases cell proliferation, indicating SorLA mediates mitogenic HA signaling. |
Antisense oligonucleotides, metalloprotease inhibitors, ligand stimulation assays, cell proliferation assays |
Journal of cell science |
Medium |
11082041
|
| 2012 |
SorLA interacts with the retromer complex via a FANSHY sequence in its cytoplasmic domain recognized by the VPS26 subunit; this interaction is required for retrograde sorting of SorLA (and APP) from endosomes to the TGN. Mutations in the VPS26-binding site redistribute SorLA to endosomes and increase amyloidogenic APP processing despite retained APP-binding activity. |
Motif identification, mutagenesis, VPS26 knockdown, co-immunoprecipitation, APP processing assays |
The Journal of neuroscience |
High |
22279231
|
| 2012 |
GGA1 specifically mediates LR11 endocytic traffic; the LR11 GGA-binding motif (when mutated) alters endosomal distribution of LR11 and its effects on APP traffic and Aβ production. GGA1 knockdown reduces both LR11- and BACE1-mediated modulation of APP processing. Mutagenesis of BACE1 S498A enhances BACE1 targeting to LR11-positive compartments and nullifies LR11-mediated Aβ reduction. |
siRNA knockdown, GGA-binding motif mutagenesis, APP trafficking assays, Aβ ELISA |
Molecular biology of the cell |
High |
22621900
|
| 2014 |
SorLA directs lysosomal targeting of nascent Aβ peptides by binding Aβ to its amino-terminal VPS10P domain; overexpression of SORLA in mice decreases brain Aβ levels. A familial AD mutation in SORL1 impairs Aβ binding to the VPS10P domain, revealing loss of SorLA's Aβ-sorting function as a disease mechanism. |
SORLA transgenic mouse model, brain Aβ measurement, domain binding assays, familial mutation functional testing |
Science translational medicine |
High |
24523320
|
| 2015 |
Crystal structure of the human SorLA VPS10p domain (ten-bladed β-propeller with a central tunnel) in unbound and Aβ-bound states reveals that Aβ and an internal propeptide ligand bind at the same tunnel site; SorLA VPS10p recognizes peptides in redundant modes without strict sequence dependence, favoring β-sheet-forming peptides. |
X-ray crystallography, structural analysis of ligand complexes |
Nature structural & molecular biology |
High |
25643321
|
| 2010 |
ROCK2 (Rho-associated coiled-coil kinase 2) binds LR11/SorLA, co-immunoprecipitates from human brain tissue, and phosphorylates LR11 at serine 2206 in its cytoplasmic tail; ROCK2 knockdown decreases LR11 ectodomain shedding and increases intracellular LR11; S2206A mutation reduces LR11 shedding and phosphorylation and abrogates LR11-mediated Aβ reduction. |
LC-MS/MS kinase discovery, co-IP from brain, ROCK inhibitor treatment, siRNA knockdown, site-directed mutagenesis, in vitro phosphorylation assay |
The Journal of biological chemistry |
High |
21147781
|
| 2011 |
SORLA prevents APP oligomerization in cultured cells and in vivo in mouse brain, eliminating the preferred oligomeric substrate for secretases and causing secretases to switch to a less efficient non-allosteric mode; secretases are allosteric enzymes requiring APP oligomerization for efficient processing. |
Quantitative biochemical studies combined with mathematical modeling; cell and mouse brain APP oligomerization assays |
The EMBO journal |
High |
21989385
|
| 2015 |
The SorLA CR-cluster (11 complement-type repeat domains) is essential for interaction with APP and for protection against APP processing; deletion of the CR-cluster abolishes APP interaction and protection; mutation of CR-domain fingerprint residues changes O-linked glycosylation of APP in the Golgi. |
Stable cell lines expressing SorLA deletion and point mutants, co-immunoprecipitation, Western blotting, ELISA for Aβ |
The Journal of biological chemistry |
High |
25525276
|
| 2015 |
SORLA has distinct anterograde (GGA-dependent, lysosomal targeting of Aβ) and retrograde (retromer-dependent, TGN retrieval of APP) sorting functions in vivo; disruption of retromer binding causes SORLA accumulation in endosomes, depletion from TGN, and enhanced APP processing; disruption of GGA interaction does not affect APP processing but causes increased brain Aβ levels. |
Mouse models expressing SORLA trafficking mutants (GGA-binding or retromer-binding site mutations), APP processing and Aβ measurement in brain |
The Journal of neuroscience |
High |
26377460
|
| 2016 |
SNX27 binds the SORLA cytosolic tail to form a ternary complex with APP; SNX27 enhances cell-surface SORLA and APP levels and endosome-to-cell-surface recycling of APP; depletion of SNX27 reduces APP recycling in a SORLA-dependent manner; SNX27 overexpression increases non-amyloidogenic surface APP cleavage products in a SORLA-dependent manner. |
Co-immunoprecipitation, knockdown/overexpression, APP recycling kinetics assay, Aβ measurement |
The Journal of neuroscience |
High |
27466343
|
| 2001 |
LR11 overexpression in cells enables binding and internalization of apolipoprotein E-rich lipoproteins (β-VLDL) with high affinity, mediates cholesteryl ester accumulation, and promotes lipid droplet formation; ApoE content of lipoproteins is a key determinant of high-affinity binding. |
LR11 transfection in hamster cells, ligand binding assays, lipoprotein endocytosis and degradation assays, cholesteryl ester accumulation |
Arteriosclerosis, thrombosis, and vascular biology |
High |
11557679
|
| 2002 |
LR11 overexpression in smooth muscle cells increases migration and invasion via upregulation of cell-surface urokinase-type plasminogen activator receptor (uPAR); anti-uPA/uPAR antibodies abolish the LR11-dependent migration; LR11 decreases uPAR catabolism, increasing its cell-surface levels. |
LR11 cDNA transfection, migration/invasion assays, receptor-associated protein and antibody inhibition, uPAR expression analysis |
Circulation |
High |
11956127
|
| 2008 |
LR11/SorLA deficiency in a mouse model of amyloidosis (APPswe/PS1ΔE9) significantly increases Aβ levels, exacerbates early amyloid pathology in a gene-dose-dependent manner, and increases processing of APP holo-molecule into α-, β-, and γ-secretase-derived metabolites, demonstrating that LR11 regulates APP processing and Aβ accumulation in vivo. |
LR11-deficient mice crossed with AD transgenic mice; Aβ measurement; amyloid pathology quantification |
The Journal of neuroscience |
High |
19036982
|
| 2008 |
Soluble LR11 (sLR11) promotes vascular smooth muscle cell migration in an Ang II-dependent manner via activation of focal adhesion kinase/ERK/Rac1 and complex formation between uPAR and integrin αvβ3; LR11 gene disruption greatly reduces Ang II-induced SMC migration and arterial intimal thickening in mice. |
LR11 knockout mice, femoral artery cuff model, SMC migration assays, signaling pathway analysis by FAK/ERK/Rac1 activation, uPAR-integrin co-immunoprecipitation |
The Journal of clinical investigation |
High |
18618022
|
| 2013 |
SorLA acts as a sorting receptor for the GDNF/GFRα1 complex, directing it from the cell surface to endosomes for lysosomal degradation of GDNF while GFRα1 recycles; SorLA/GFRα1 complex also targets RET for endocytosis but not degradation, affecting GDNF-induced neurotrophic activities; SorLA-deficient mice display elevated GDNF levels, altered dopaminergic function, hyperactivity, and reduced anxiety. |
SorLA knockout mouse model, GDNF/GFRα1/RET trafficking assays, lysosomal degradation assays, behavioral phenotyping |
Cell reports |
High |
23333276
|
| 2014 |
α2A adrenergic receptor (α2AAR) activation disrupts APP interaction with SorLA in cells and mouse brain, reducing Golgi localization of APP and promoting APP distribution in endosomes and β-secretase cleavage; α2AAR genetic deficiency reduces Aβ generation and AD-related pathology. |
Co-immunoprecipitation of APP-SorLA complex, α2AAR knockout and agonist/antagonist treatments, APP localization by fractionation, Aβ measurement, AD mouse model |
Proceedings of the National Academy of Sciences of the United States of America |
High |
25404298
|
| 2015 |
Soluble LR11/SorLA (sLR11) suppresses thermogenesis in adipose tissue in a cell-autonomous manner; mice lacking LR11 are protected from diet-induced obesity with increased browning of white adipose tissue; sLR11 inhibits thermogenesis via BMP/TGFβ signaling pathway and reduces Smad phosphorylation. |
LR11 knockout mice, diet-induced obesity model, adipocyte treatment with sLR11, Smad phosphorylation assays |
Nature communications |
High |
26584636
|
| 2016 |
SORLA acts as a sorting factor for the insulin receptor (IR) in adipocytes, redirecting internalized IR from endosomes to the plasma membrane, thereby enhancing IR surface expression and strengthening insulin signaling; SORLA overexpression in murine adipose tissue blocks triacylglyceride hydrolysis causing excessive adiposity, while Sorl1 inactivation accelerates lipolysis and protects from diet-induced obesity. |
Tissue-specific SORLA overexpression, Sorl1 knockout mice, IR trafficking assays, lipolysis measurements |
The Journal of clinical investigation |
High |
27322061
|
| 2017 |
SORLA interacts with the EphA4 receptor tyrosine kinase and attenuates ephrinA1-induced EphA4 clustering and activation; SORLA transgenic mice show decreased EphA4 activation and redistribution to postsynaptic densities, with milder Aβ oligomer-induced LTP deficits and memory impairment; active EphA4 levels are elevated in human AD brains and inversely correlated with SORLA/EphA4 association. |
Co-immunoprecipitation of SORLA-EphA4, SORLA transgenic mice, LTP recordings, behavioral tests, human AD brain analysis |
The Journal of experimental medicine |
High |
29114064
|
| 2019 |
SORLA co-precipitates with HER2 in cancer cells and promotes recycling of endosomal HER2 back to the plasma membrane; SORLA depletion triggers HER2 targeting to late endosomal/lysosomal compartments, impairs HER2-driven signaling and in vivo tumor growth, and disrupts lysosome function. |
Co-immunoprecipitation, SORLA knockdown, HER2 trafficking assays, in vivo tumor growth assays |
Nature communications |
High |
31138794
|
| 2017 |
SorLA mediates efficient cellular uptake of IL-6 and soluble IL-6 receptor (IL-6R) in astrocytes; SorLA interacts with membrane-bound IL-6R at the cell surface and downregulates IL-6 cis signaling; soluble SorLA ectodomain (shed form) acts as an IL-6 carrier protein stabilizing IL-6 for trans signaling. |
SorLA-mediated uptake assays in astrocytes, IL-6 signaling assays, co-immunoprecipitation, ectodomain shedding analysis |
Molecular and cellular biology |
High |
28265003
|
| 2020 |
SORL1 depletion in hiPSC-derived neurons causes early endosome enlargement and altered APP localization in early endosomes (a site of BACE cleavage); this endosomal phenotype is selective to neurons (not microglia) and is independent of amyloidogenic APP processing, as BACE inhibition does not rescue endosome enlargement. |
CRISPR-Cas9 SORL1 depletion in hiPSCs, endosome size measurement, APP localization by immunofluorescence, BACE inhibitor treatment, comparison across cell types |
Cell reports |
High |
32492427
|
| 2022 |
SORL1 regulates endosomal trafficking and recycling of APP, TRKB, and GLUA1 in human hiPSC-derived neurons; SORL1 depletion impairs trafficking of all three cargoes to late endosomes/lysosomes and reduces recycling endosome-to-cell-surface delivery of APP and GLUA1; SORL1 overexpression enhances endosomal recycling; loss of GLUA1 recycling functionally impairs synaptic activity measured by MEA. |
Isogenic hiPSC SORL1 knockout/overexpression, confocal microscopy, cell surface recycling assays, lysosomal degradation assays, MEA recordings, RNA sequencing |
Cellular and molecular life sciences |
High |
35226190
|
| 2014 |
Tetraspanin CD9 modulates ADAM17-mediated shedding of LR11 in leukocytes; CD9 colocalization with LR11 on the cell surface restrains shedding; CD9 knockdown or antibody blockade increases sLR11 release, which is abrogated by metalloprotease inhibitor GM6001. |
Confocal colocalization, CD9 overexpression/knockdown, neutralizing antibody, metalloprotease inhibitor, sLR11 ELISA |
Experimental & molecular medicine |
High |
24699135
|
| 2010 |
SorCS1 (a sortilin family member) forms complexes with APP, SorL1, and Vps35 recoverable from non-transgenic mouse brain; Sorcs1 hypomorphic female mice show decreased total SorL1 (29%) and Vps35 (49%) protein levels and increased endogenous murine Aβ40 and Aβ42, indicating SorCS1 functionally interacts with SorLA/retromer in APP/Aβ metabolism. |
Co-immunoprecipitation from mouse brain, Sorcs1 hypomorphic mouse model, Aβ ELISA, Western blot quantification |
The Journal of neuroscience |
Medium |
20881129
|
| 2012 |
An intronic antisense ncRNA (51A) mapping to intron 1 of SORL1 drives a splicing shift from canonical long SORL1 variant A to an alternatively spliced form, resulting in decreased SORL1 variant A synthesis and impaired APP processing leading to increased Aβ formation; 51A is upregulated in AD cerebral cortex. |
ncRNA overexpression, SORL1 isoform quantification, APP processing and Aβ assays, human brain expression analysis |
Disease models & mechanisms |
Medium |
22996644
|
| 2021 |
Rare SORL1 missense variants (S114R, R332W, G543E, S577P, R654W, and others) cause impaired SorLA maturation and endosomal trafficking by retaining the protein in the endoplasmic reticulum, reducing delivery of mature SorLA to the plasma membrane and endosomal system; R332W and R654W variants expressed at endogenous levels in hiPSCs increase Aβ secretion, demonstrating loss-of-function. |
HEK293 overexpression screen (70 variants), CRISPR/Cas9-modified hiPSCs, maturation assays, subcellular localization by immunofluorescence, Aβ ELISA |
Acta neuropathologica communications |
High |
34922638
|
| 2020 |
Soluble SORLA (sSORLA) binds and activates the EGF receptor (EGFR), triggering ERK activation and Fos upregulation to enhance neurite outgrowth and regeneration; pharmacological EGFR or ERK inhibition reverses sSORLA-dependent neurite outgrowth enhancement. |
SORLA transgenic neurons, sSORLA purification, co-precipitation of sSORLA with EGFR, EGFR phosphorylation assay, ERK activation, pharmacological inhibition, neurite outgrowth assays, RNAseq |
The Journal of neuroscience |
High |
32601248
|
| 2021 |
SorLA interacts directly with HER3 and forms a trimeric complex with HER2 and HER3, attenuating lysosomal degradation of the HER2-HER3 dimer in a Rab4-dependent recycling manner; heregulin-mediated signaling supports SorLA transcription downstream of the MAPK pathway; SorLA loss sensitizes cancer cells to neratinib. |
Co-immunoprecipitation of SorLA-HER3, Rab4-dependent recycling assays, SorLA knockdown, in vivo zebrafish xenograft, MAPK pathway inhibition |
Oncogene |
High |
33420373
|
| 2023 |
SORLA dimerizes via its fibronectin-type-III (3Fn) and VPS10p domains within retromer-positive endosomal tubules; a SORLA fragment comprising the 3Fn, transmembrane, and cytoplasmic domains forms dimers and enhances retromer-dependent recycling of APP by decreasing amyloidogenic processing. |
X-ray crystallography, AlphaFold structural modeling, SORLA fragment functional assays, APP processing assays |
Proceedings of the National Academy of Sciences of the United States of America |
High |
36652482
|
| 2023 |
Loss of SORL1 in neurons (but not astrocytes) causes cell-type-specific reduction of APOE and CLU (clusterin) and altered lipid profiles; TGF-β/SMAD signaling is implicated in SORL1 function; modulating SMAD signaling alters APOE RNA levels in a SORL1-dependent manner; retromer enhancement rescues tau phenotypes but not APOE levels in SORL1-null neurons. |
SORL1-null iPSCs differentiated to multiple cell types, RNA sequencing, APOE/CLU quantification, retromer rescue experiments, SMAD signaling modulation |
Cell reports |
High |
37611586
|
| 2022 |
SORL1 haploinsufficiency in Göttingen minipigs (CRISPR-Cas9 engineered) phenocopies the preclinical in vivo AD biomarker profile of APP/PSEN1/PSEN2 mutations, with elevated Aβ and tau biofluid levels preceding amyloid plaque formation, supporting SORL1 haploinsufficiency as causal for AD through endosome cytopathology. |
CRISPR-Cas9 minipig SORL1 haploinsufficiency model, CSF and blood Aβ/tau biomarker measurement |
Cell reports. Medicine |
High |
36099918
|
| 2016 |
SorLA mediates polarized trafficking in neurons (somatodendritic domain) and epithelial MDCK cells (basolateral surface); polarized distribution depends on an acidic cluster motif and involves the AP-1 adaptor complex; SorLA can mediate transcytosis across tight cell layers. |
MDCK polarized cell trafficking, hippocampal neuron localization, AP-1 dependence, transcytosis assay |
The FEBS journal |
Medium |
27192064
|
| 2013 |
Soluble LR11 (sLR11) regulates hypoxia-induced uPAR-mediated adhesion of hematopoietic stem and progenitor cells (HSPCs) to bone marrow stromal cells; hypoxia increases LR11 expression in HSPCs via HIF-1α binding to the LR11 promoter; lr11-/- mouse HSPCs show reduced hypoxia-enhanced attachment; sLR11 promotes HSPC adhesion through uPAR. |
LR11 knockout mice, HSPC adhesion assays, HIF-1α ChIP, uPAR blocking antibodies, U937 cell hypoxia experiments |
The Journal of biological chemistry |
High |
23486467
|
| 2024 |
The SORL1 missense variant p.R953C occurs at a critical position in the YWTD-domain and causes retention of SorLA in the ER, reducing maturation, shedding, and normal endosomal trafficking, consistent with a pathogenic loss-of-function mechanism for AD. |
Family sequencing, SORL1 variant functional studies in cells, ER retention assays, maturation and shedding assays |
Acta neuropathologica |
Medium |
38244079
|
| 2023 |
Pharmacological enhancement of retromer (TPT-260, a retromer-stabilizing molecule) rescues endosomal, amyloid, and tau pathologies in SORL1-deficient, haploinsufficient, and variant-expressing hiPSC-derived cortical neurons; the degree of rescue depends on the number of functional SORL1 copies, establishing the SORL1-retromer axis as therapeutically targetable. |
hiPSC-derived cortical neurons with SORL1 CRISPR variants, TPT-260 treatment, retromer subunit quantification, endosome, Aβ, and tau phenotype assays |
Stem cell reports |
Medium |
37949073
|
| 1999 |
LR11 protein is localized mainly to neurons throughout the rat and human brain, with highest immunoreactivity in hippocampus, brainstem nuclei, and Purkinje cells; a unique single cytoplasmic punctum (putative botrysome) is observed near apical dendrites of pyramidal neurons, suggesting roles in intracellular trafficking. |
Immunohistochemistry in rat and human brain with anti-LR11 polyclonal antibody |
Brain research |
Medium |
10375696
|