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TREM2

Chr 6p21.1

triggering receptor expressed on myeloid cells 2

Aliases:
TREM-2, Trem2a, Trem2b, Trem2c
MANE:
ENST00000373113.8

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Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Adult onset leukodystrophy

    BIALLELIC, autosomal or pseudoautosomal
  • Adult onset neurodegenerative disorder

    BIALLELIC, autosomal or pseudoautosomal
  • Intracerebral calcification disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Skeletal dysplasia

    BIALLELIC, autosomal or pseudoautosomal
  • White matter disorders and cerebral calcification - narrow panel

    BIALLELIC, autosomal or pseudoautosomal
  • Adult onset dystonia, chorea or related movement disorder

  • Childhood onset dystonia, chorea or related movement disorder

  • Early onset dementia (encompassing fronto-temporal dementia and prion disease)

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Disease associations (Open Targets)

  • Nasu-Hakola disease

    0.80
  • Alzheimer disease

    0.55
  • Basal ganglia calcification

    0.46
  • frontotemporal dementia

    0.43
  • hereditary disease

    0.41
  • Dystonia

    0.37
  • neurodegenerative disease

    0.35
  • dementia

    0.34
  • polycystic lipomembranous osteodysplasia with sclerosing leukoencephaly

    0.34
  • late-onset Alzheimers disease

    0.34

Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.

Protein function (UniProt)

Triggering receptor expressed on myeloid cells 2

Forms a receptor signaling complex with TYROBP which mediates signaling and cell activation following ligand binding (PubMed:10799849). Acts as a receptor for amyloid-beta protein 42, a cleavage product of the amyloid-beta precursor protein APP, and mediates its uptake and degradation by microglia (PubMed:27477018, PubMed:29518356). Binding to amyloid-beta 42 mediates microglial activation, proliferation, migration, apoptosis and expression of pro-inflammatory cytokines, such as IL6R and CCL3, and the anti-inflammatory cytokine ARG1 (By similarity). Acts as a receptor for lipoprotein particles such as LDL, VLDL, and HDL and for apolipoproteins such as APOA1, APOA2, APOB, APOE, APOE2, APOE3, APOE4, and CLU and enhances their uptake in microglia (PubMed:27477018). Binds phospholipids (preferably anionic lipids) such as phosphatidylserine, phosphatidylethanolamine, phosphatidylglycerol and sphingomyelin (PubMed:29794134). Regulates microglial proliferation by acting as an upstream regulator of the Wnt/beta-catenin signaling cascade (By similarity). Required for microglial phagocytosis of apoptotic neurons (PubMed:24990881). Also required for microglial activation and phagocytosis of myelin debris after neuronal injury and of neuronal synapses during synapse elimination in the developing brain (By similarity). Regulates microglial chemotaxis and process outgrowth, and also the microglial response to oxidative stress and lipopolysaccharide (By similarity). It suppresses PI3K and NF-kappa-B signaling in response to lipopolysaccharide; thus promoting phagocytosis, suppressing pro-inflammatory cytokine and nitric oxide production, inhibiting apoptosis and increasing expression of IL10 and TGFB (By similarity). During oxidative stress, it promotes anti-apoptotic NF-kappa-B signaling and ERK signaling (By similarity). Plays a role in microglial MTOR activation and metabolism (By similarity). Regulates age-related changes in microglial numbers (PubMed:29752066). Triggers activation of the immune responses in macrophages and dendritic cells (PubMed:10799849). Mediates cytokine-induced formation of multinucleated giant cells which are formed by the fusion of macrophages (By similarity). In dendritic cells, receptor of SEMA6D with PLEXNA1 as coreceptor and mediates up-regulation of chemokine receptor CCR7 and dendritic cell maturation and survival (PubMed:11602640). Involved in the positive regulation of osteoclast differentiation (PubMed:12925681)

Data sources: HGNC (CC BY 4.0), AlphaFold (CC BY 4.0, Jumper et al. Nature 2021), Genomics England PanelApp (CC BY 4.0), ClinGen, Open Targets (CC0), UniProt.

Not for sole clinical decision-making. Always verify against primary sources.