Affinage

TMEM59

Transmembrane protein 59 · UniProt Q9BXS4

Round 2 corrected
Length
323 aa
Mass
36.2 kDa
Annotated
2026-04-28
41 papers in source corpus 10 papers cited in narrative 10 extracted findings

Mechanistic narrative

Synthesis pass · prose summary of the discoveries below

TMEM59 is a Golgi-resident type I transmembrane protein that functions at the intersection of membrane protein glycosylation, selective autophagy, and signal transduction, with particular importance in microglial biology. It modulates Golgi complex glycosylation of client proteins such as APP and the prion protein, thereby controlling their trafficking and proteolytic processing (PMID:20427278), and it promotes selective autophagy of endosomes and bacteria by engaging the WD40 domain of ATG16L1 through a 19-amino-acid intracellular motif—an interaction disrupted by the Crohn's disease-associated ATG16L1 T300A variant (PMID:23376921, PMID:27273576). In microglia, TMEM59 stabilizes the C1q receptor CD93 to support complement-dependent synapse engulfment, suppresses NLRP3-driven pyroptosis, reciprocally regulates TREM2-dependent homeostatic functions, and negatively controls chaperone-mediated autophagy through interaction with LAMP2A and HSC70 (PMID:35606143, PMID:33517129, PMID:32826884, PMID:40551290). TMEM59 additionally potentiates Wnt/β-catenin signaling by driving intramembrane assembly of FZD–LRP6 signalosomes (PMID:29632210).

Mechanistic history

Synthesis pass · year-by-year structured walk · 9 steps
  1. 2010 High

    Establishing TMEM59 as a Golgi glycosylation regulator resolved how an uncharacterized transmembrane protein could broadly influence APP processing and Aβ generation by controlling upstream N- and O-glycan maturation rather than secretase activity itself.

    Evidence Overexpression in cell lines with glycosylation assays, subcellular fractionation, and secretase cleavage readouts

    PMID:20427278

    Open questions at the time
    • Endogenous loss-of-function data for glycosylation phenotype not provided
    • Mechanism by which TMEM59 inhibits COG-dependent glycosylation reactions undefined
    • Relevance to APP processing in neurons in vivo untested
  2. 2013 High

    Identification of a 19-amino-acid motif that recruits ATG16L1 via its WD40 domain revealed a non-canonical route for selective autophagy of pathogen-containing endosomes, establishing TMEM59 as a membrane-intrinsic autophagy receptor.

    Evidence Minimal peptide mapping, endogenous Co-IP, LC3 labeling, lysosomal targeting, and S. aureus infection model

    PMID:23376921

    Open questions at the time
    • Whether TMEM59-ATG16L1 interaction is direct or mediated by intermediaries not resolved by Co-IP alone
    • Structural basis of WD40–motif recognition undetermined
  3. 2016 High

    Demonstrating that the Crohn's disease ATG16L1 T300A variant specifically impairs the TMEM59–ATG16L1 interaction while sparing canonical autophagy connected a disease-relevant polymorphism to a defined molecular defect in non-canonical (TMEM59-driven) autophagy.

    Evidence ATG16L1 T300A mutagenesis with Co-IP, autophagy flux, and trafficking assays during bacterial infection

    PMID:27273576

    Open questions at the time
    • In vivo demonstration in Crohn's patient-derived cells not shown
    • Whether other ATG16L1 WD40-binding partners are similarly affected not addressed
  4. 2018 High

    Discovery of TMEM59 as a FZD/LRP6 interactor that promotes intramembrane Wnt signalosome assembly expanded its functional repertoire beyond autophagy and glycosylation to include signal transduction.

    Evidence Tagged-Wnt3a pulldown with mass spectrometry, Co-IP, Wnt reporter assays, signalosome assembly assays

    PMID:29632210

    Open questions at the time
    • Loss-of-function effect on endogenous Wnt signaling not demonstrated
    • Tissue contexts where TMEM59-dependent Wnt regulation is physiologically relevant remain unclear
  5. 2020 Medium

    Showing that TREM2 promotes proteasomal degradation of TMEM59 and that TMEM59 silencing rescues multiple deficits in Trem2-deficient microglia established a reciprocal regulatory axis linking TMEM59 to microglial homeostasis.

    Evidence Co-IP, overexpression/knockdown, autophagy flux, and functional rescue assays in microglial cells

    PMID:32826884

    Open questions at the time
    • Mechanism of TREM2-mediated proteasomal targeting of TMEM59 not defined
    • In vivo validation of reciprocal regulation not provided
    • Single-lab finding awaiting independent confirmation
  6. 2021 Medium

    TMEM59 knockout in a stroke model revealed an anti-inflammatory, anti-pyroptotic role: loss of TMEM59 potentiates NF-κB activation and NLRP3/GSDMD-N pyroptosis in microglia, positioning TMEM59 as a negative regulator of neuroinflammation.

    Evidence MCAO mouse model with TMEM59 KO, OGD/R in vitro, Western blot for pyroptosis markers, overexpression rescue

    PMID:33517129

    Open questions at the time
    • Direct molecular mechanism by which TMEM59 suppresses NF-κB not identified
    • Findings from a single lab with global KO—cell-type specificity not resolved
  7. 2022 High

    Microglia-specific conditional knockout demonstrated that TMEM59 stabilizes CD93 protein to promote complement-dependent synapse engulfment in vivo, causally linking TMEM59 deficiency to excess excitatory synapses and ASD-like behaviors.

    Evidence Conditional KO mice, Co-IP, synapse engulfment assays, electrophysiology, behavioral testing

    PMID:35606143

    Open questions at the time
    • Mechanism by which TMEM59 prevents CD93 degradation not elucidated
    • Whether human TMEM59 variants associate with ASD or synaptic phenotypes unknown
  8. 2025 Medium

    Interaction with LAMP2A and HSC70 and negative regulation of chaperone-mediated autophagy (CMA) revealed a second autophagy-regulatory axis for TMEM59, distinct from its ATG16L1-dependent function, with haploinsufficiency attenuating tauopathy in PS19 mice.

    Evidence Co-IP of endogenous partners, CMA activity assays, LAMP2A quantification, haploinsufficient mouse model with behavioral and neuropathological endpoints

    PMID:40551290

    Open questions at the time
    • Mechanism of TMEM59 inhibition of LAMP2A multimerization or CMA substrate translocation not defined
    • Single-lab finding; independent replication needed
    • Relationship between CMA inhibition and the ATG16L1-dependent autophagy function of TMEM59 not clarified
  9. 2025 Medium

    Elucidation of HOXA5→FTO→m6A demethylation as the transcriptional and post-transcriptional circuit sustaining TMEM59 mRNA levels in stroke explained how TMEM59 anti-pyroptotic function is regulated upstream.

    Evidence MCAO/OGD-R, MeRIP for m6A, ChIP for HOXA5-FTO, RIP for YTHDF2-TMEM59 mRNA, functional rescue

    PMID:40772328

    Open questions at the time
    • Whether this m6A regulatory circuit operates outside stroke/ischemia contexts unknown
    • Quantitative contribution of m6A-dependent versus transcription-dependent TMEM59 regulation not dissected

Open questions

Synthesis pass · forward-looking unresolved questions
  • The structural basis for TMEM59's diverse protein interactions (ATG16L1, LAMP2A, CD93, TREM2, FZD/LRP6) is unknown, and how its glycosylation-modulatory, autophagy-regulatory, and signaling functions are coordinately controlled in different cell types remains an open question.
  • No structural model of TMEM59 or its complexes exists
  • Integration of TMEM59's dual autophagy roles (ATG16L1-mediated and CMA) is uncharacterized
  • Physiological relevance of Golgi glycosylation function versus autophagy functions in vivo remains unresolved

Mechanism profile

Synthesis pass · controlled-vocabulary classification · explore literature graph →
Molecular activity
GO:0060090 molecular adaptor activity 3 GO:0098772 molecular function regulator activity 3
Localization
GO:0005768 endosome 2 GO:0005764 lysosome 1 GO:0005794 Golgi apparatus 1
Pathway
R-HSA-9612973 Autophagy 4 R-HSA-168256 Immune System 2 R-HSA-162582 Signal Transduction 1 R-HSA-392499 Metabolism of proteins 1
Partners
APPATG16L1CD93FZDHSC70LAMP2ALRP6TREM2

Evidence

Reading pass · 10 per-paper findings extracted from the source corpus
Year Finding Method Journal Conf PMIDs
2010 TMEM59 is a Golgi-localized type I transmembrane protein that inhibits complex N- and O-glycosylation of APP, causes APP retention in the Golgi, and thereby reduces APP cleavage by alpha- and beta-secretase and Aβ generation. It also inhibits complex N-glycosylation of the prion protein, suggesting a general role in modulating Golgi glycosylation reactions, phenocopying loss of COG1/COG2 function. Transfection/overexpression, subcellular fractionation, glycosylation assays, secretase activity assays, immunofluorescence localization The Journal of biological chemistry High 20427278
2013 TMEM59 contains a novel 19-amino-acid peptide motif in its intracellular domain that binds the WD-repeat domain of ATG16L1, promotes LC3 labeling and lysosomal targeting of its own endosomal compartment, and mediates selective autophagy (xenophagy) in response to Staphylococcus aureus infection. Endogenous TMEM59 co-immunoprecipitates with ATG16L1. Minimal peptide mapping, Co-IP, LC3 labeling assays, lysosomal targeting assays, bacterial infection model, mutagenesis The EMBO journal High 23376921
2016 The Crohn's disease-associated ATG16L1 T300A polymorphism impairs the ability of the ATG16L1 WD40 domain to interact with the TMEM59 motif, blunting TMEM59-induced unconventional autophagy and disrupting TMEM59's intracellular trafficking and ATG16L1 engagement during bacterial infection, while leaving canonical autophagy unaffected. ATG16L1 T300A mutagenesis, Co-IP, autophagy flux assays, intracellular trafficking assays, bacterial infection model Nature communications High 27273576
2018 TMEM59 is an interactor of Frizzled (FZD) and LRP6 Wnt receptors identified by mass spectrometry of tagged-Wnt3a pulldowns. TMEM59 acts as a positive regulator of Wnt/β-catenin signaling by promoting intramembrane interactions that drive formation of multimeric Wnt-FZD assemblies, which then merge with LRP6 to form mature Wnt signalosomes. Internally tagged Wnt3a pulldown, mass spectrometry-based proteomics, Co-IP, signalosome assembly assays, Wnt reporter assays, intramembrane interaction mapping Proceedings of the National Academy of Sciences of the United States of America High 29632210
2020 TMEM59 interacts with TREM2 in microglia; TREM2 overexpression promotes proteasomal degradation of TMEM59, whereas TMEM59 levels are elevated in Trem2-deficient microglia. TMEM59 expression facilitates autophagic flux through its carboxyl-terminus, and TMEM59 silencing rescues impaired survival, proliferation, migration, phagocytosis, autophagy, and metabolism in Trem2-deficient microglia. Co-IP, Western blot, overexpression/knockdown, autophagy flux assays, cell function assays (survival, proliferation, migration, phagocytosis) Cell death & disease Medium 32826884
2022 TMEM59 in microglia interacts with the C1q receptor CD93; TMEM59 deficiency promotes CD93 protein degradation, impairing synapse engulfment both in vivo and in vitro. Microglia-specific Tmem59 knockout mice develop ASD-like behaviors with enhanced excitatory synaptic transmission and increased dendritic spine density. Co-IP, microglia-specific conditional KO, in vivo and in vitro synapse engulfment assays, electrophysiology, behavioral testing, synaptosome fractionation The Journal of neuroscience High 35606143
2021 TMEM59 knockout in mice exacerbates cerebral ischemia/reperfusion injury; TMEM59 loss in microglia potentiates microglial activation (Iba-1 elevation), aggravates NLRP3/caspase-1/GSDMD-N pyroptosis, and activates NF-κB signaling. Overexpression of TMEM59 in vitro suppresses pyroptosis and inflammation in OGD/R-treated microglial cells. MCAO mouse model, TMEM59 KO, in vitro OGD/R, Western blot for pyroptosis markers, NF-κB pathway analysis, overexpression rescue Biochemical and biophysical research communications Medium 33517129
2025 TMEM59 levels increase in AD patient brains and tauopathy model (PS19) mice. TMEM59 interacts with lysosome-associated membrane protein type 2A (LAMP2A) and HSC70, negatively regulating chaperone-mediated autophagy (CMA); TMEM59 deficiency promotes LAMP2A levels and CMA activity, whereas overexpression has the opposite effect. TMEM59 haploinsufficiency attenuates cognitive deficits and tauopathy-related pathologies in PS19 mice. Co-IP (TMEM59 with LAMP2A and HSC70), biochemical CMA activity assays, LAMP2A quantification, haploinsufficient mouse model, behavioral testing, neuropathological analysis Alzheimer's & dementia Medium 40551290
2024 TMEM59 interacts with the G-protein coupled receptor GPR161; their interaction mediates inhibition of NF-κB activity and inflammatory cytokine production in LPS-treated bovine mammary alveolar cells. Co-immunoprecipitation, CRISPR/Cas9-based knockdown and overexpression, Western blot, ELISA for cytokines Journal of ethnopharmacology Medium 38942158
2025 HOXA5 transcriptionally activates FTO expression in microglia; FTO-mediated m6A demethylation of TMEM59 mRNA prevents YTHDF2-mediated degradation, thereby stabilizing TMEM59 mRNA and sustaining TMEM59 levels that suppress microglial pyroptosis in cerebral stroke. MCAO/OGD-R models, MeRIP assay for m6A, dual-luciferase and ChIP for HOXA5-FTO interaction, RIP assay for YTHDF2-TMEM59 mRNA interaction, overexpression/knockdown, flow cytometry for pyroptosis FASEB journal Medium 40772328

Source papers

Stage 0 corpus · 41 papers · ranked by NIH iCite citations
Year Title Journal Citations PMID
2002 Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences. Proceedings of the National Academy of Sciences of the United States of America 1479 12477932
2015 The BioPlex Network: A Systematic Exploration of the Human Interactome. Cell 1118 26186194
2017 Architecture of the human interactome defines protein communities and disease networks. Nature 1085 28514442
2003 Complete sequencing and characterization of 21,243 full-length human cDNAs. Nature genetics 754 14702039
2021 Dual proteome-scale networks reveal cell-specific remodeling of the human interactome. Cell 705 33961781
2011 Phylogenetic-based propagation of functional annotations within the Gene Ontology consortium. Briefings in bioinformatics 656 21873635
2008 Large-scale proteomics and phosphoproteomics of urinary exosomes. Journal of the American Society of Nephrology : JASN 607 19056867
1994 Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides. Gene 492 8125298
2004 The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). Genome research 438 15489334
1996 Normalization and subtraction: two approaches to facilitate gene discovery. Genome research 401 8889548
2021 A proximity-dependent biotinylation map of a human cell. Nature 339 34079125
2003 The secreted protein discovery initiative (SPDI), a large-scale effort to identify novel human secreted and transmembrane proteins: a bioinformatics assessment. Genome research 285 12975309
2012 Genome-wide DNA methylation differences between late-onset Alzheimer's disease and cognitively normal controls in human frontal cortex. Journal of Alzheimer's disease : JAD 194 22451312
2000 Cloning and functional analysis of cDNAs with open reading frames for 300 previously undefined genes expressed in CD34+ hematopoietic stem/progenitor cells. Genome research 161 11042152
2019 A protein-interaction network of interferon-stimulated genes extends the innate immune system landscape. Nature immunology 159 30833792
2006 The DNA sequence and biological annotation of human chromosome 1. Nature 144 16710414
2009 Ubiquitin-mediated proteolysis of HuR by heat shock. The EMBO journal 142 19322201
2019 Mapping the proximity interaction network of the Rho-family GTPases reveals signalling pathways and regulatory mechanisms. Nature cell biology 137 31871319
1998 Identification of genes expressed in human CD34(+) hematopoietic stem/progenitor cells by expressed sequence tags and efficient full-length cDNA cloning. Proceedings of the National Academy of Sciences of the United States of America 119 9653160
2010 Personalized smoking cessation: interactions between nicotine dose, dependence and quit-success genotype score. Molecular medicine (Cambridge, Mass.) 108 20379614
2021 Systematically defining selective autophagy receptor-specific cargo using autophagosome content profiling. Molecular cell 105 33545068
2010 Mig-6 controls EGFR trafficking and suppresses gliomagenesis. Proceedings of the National Academy of Sciences of the United States of America 99 20351267
2017 The interactome of metabolic enzyme carbonic anhydrase IX reveals novel roles in tumor cell migration and invadopodia/MMP14-mediated invasion. Oncogene 96 28692057
2013 TMEM59 defines a novel ATG16L1-binding motif that promotes local activation of LC3. The EMBO journal 96 23376921
2022 CRISPR activation screen identifies BCL-2 proteins and B3GNT2 as drivers of cancer resistance to T cell-mediated cytotoxicity. Nature communications 93 35338135
2020 Kinase Interaction Network Expands Functional and Disease Roles of Human Kinases. Molecular cell 88 32707033
2021 SARS-CoV-2-host proteome interactions for antiviral drug discovery. Molecular systems biology 86 34709727
2011 Mindbomb 1, an E3 ubiquitin ligase, forms a complex with RYK to activate Wnt/β-catenin signaling. The Journal of cell biology 85 21875946
2021 Comprehensive interactome profiling of the human Hsp70 network highlights functional differentiation of J domains. Molecular cell 64 33957083
2015 Temporal proteomics of NGF-TrkA signaling identifies an inhibitory role for the E3 ligase Cbl-b in neuroblastoma cell differentiation. Science signaling 61 25921289
2016 The T300A Crohn's disease risk polymorphism impairs function of the WD40 domain of ATG16L1. Nature communications 60 27273576
2010 The novel membrane protein TMEM59 modulates complex glycosylation, cell surface expression, and secretion of the amyloid precursor protein. The Journal of biological chemistry 60 20427278
2022 Microglial Tmem59 Deficiency Impairs Phagocytosis of Synapse and Leads to Autism-Like Behaviors in Mice. The Journal of neuroscience : the official journal of the Society for Neuroscience 47 35606143
2018 TMEM59 potentiates Wnt signaling by promoting signalosome formation. Proceedings of the National Academy of Sciences of the United States of America 39 29632210
2020 TMEM59 interacts with TREM2 and modulates TREM2-dependent microglial activities. Cell death & disease 27 32826884
2021 TMEM59 protects against cerebral ischemic stroke by suppressing pyroptosis and microglial activation. Biochemical and biophysical research communications 15 33517129
2023 TMEM59 ablation leads to loss of olfactory sensory neurons and impairs olfactory functions via interaction with inflammation. Brain, behavior, and immunity 13 37061103
2024 In vivo and in vitro anti-inflammation of Rhapontici Radix extract on mastitis via TMEM59 and GPR161. Journal of ethnopharmacology 11 38942158
2021 Whole exome sequencing, in silico and functional studies confirm the association of the GJB2 mutation p.Cys169Tyr with deafness and suggest a role for the TMEM59 gene in the hearing process. Saudi journal of biological sciences 8 34354426
2025 TMEM59 deficiency activates chaperone-mediated autophagy and ameliorates disease-like pathologies in tauopathy model mice. Alzheimer's & dementia : the journal of the Alzheimer's Association 2 40551290
2025 HOXA5 Inhibits Microglia Pyroptosis in Cerebral Stroke by Regulating FTO-Mediated TMEM59 m6A Demethylation. FASEB journal : official publication of the Federation of American Societies for Experimental Biology 0 40772328