ADAM17

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ADAM17
Gene ontology
Molecular function
Cellular component
Biological process
Sources:Amigo / QuickGO
Ensembl
UniProt
RefSeq (mRNA)

NM_003183
NM_001382777
NM_001382778
NM_021832

NM_001277266
NM_009615
NM_001291871

RefSeq (protein)

NP_003174

NP_001264195
NP_001278800
NP_033745

Location (UCSC)Chr 2: 9.49 – 9.56 MbChr 12: 21.37 – 21.42 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

A disintegrin and metalloprotease 17 (ADAM17), also called TACE (tumor necrosis factor-α-converting enzyme), is a 70-kDa

metalloproteases, activated by substrate presentation
.

Chemical characteristics

ADAM17 is an 824-

Function

ADAM17 is understood to be involved in the processing of tumor necrosis factor alpha (

ligands
, and enzymes.

Cloning of the TNF-α

juxtacrine intercellular signaling. However, pro-TNF-α can undergo a proteolytic cleavage at its Ala76-Val77 amide bond, which releases a soluble 17kDa extracellular domain (ectodomain
) from the pro-TNF-α molecule. This soluble ectodomain is the cytokine commonly known as TNF-α, which is of pivotal importance in paracrine signaling. This proteolytic liberation of soluble TNF-α is catalyzed by ADAM17.

Recently, ADAM17 was discovered as a crucial mediator of resistance to radiotherapy. Radiotherapy can induce a dose-dependent increase of furin-mediated cleavage of the ADAM17 proform to active ADAM17, which results in enhanced ADAM17 activity in vitro and in vivo. It was also shown that radiotherapy activates ADAM17 in non-small cell lung cancer, which results in shedding of multiple survival factors, growth factor pathway activation, and radiotherapy-induced treatment resistance.[7]

ADAM17 may play a prominent role in the

Notch signaling pathway, during the proteolytic release of the Notch intracellular domain (from the Notch1 receptor) that occurs following ligand binding. ADAM17 also regulates the MAP kinase signaling pathway by regulating shedding of the EGFR ligand amphiregulin in the mammary gland.[8] ADAM17 also has a role in the shedding of L-selectin, a cellular adhesion molecule.[9]

Interactions

ADAM17 has been shown to

interact
with:

Activation

The localization of ADAM17 is speculated to be an important determinant of shedding activity. TNF-α processing has classically been understood to occur in the trans-Golgi network, and be closely connected to transport of soluble TNF-α to the cell surface. Shedding is also associated with clustering of ADAM17 with its substrate, membrane bound TNF, in lipid rafts.

endogenous
ADAM17 may be localized to a perinuclear compartment, with only a small amount of TACE being present on the cell surface. The localization of mature ADAM17 to a perinuclear compartment, therefore, raises the possibility that ADAM17-mediated ectodomain shedding may also occur in the intracellular environment, in contrast with the conventional model.

Functional ADAM17 has been documented to be ubiquitously expressed in the human

colon, with increased activity in the colonic mucosa of patients with ulcerative colitis, a main form of inflammatory bowel disease. Other experiments have also suggested that expression of ADAM17 may be inhibited by ethanol.[15]

Clinical significance

Adam17 may facilitate entry of the

SARS‑CoV‑2 virus, possibly by enabling fusion of virus particles with the cytoplasmic membrane.[16] Adam17 has similar ACE2 cleavage activity as TMPRSS2, but by forming soluble ACE2, Adam17 may actually have the protective effect of blocking circulating SARS‑CoV‑2 virus particles.[16]

Adam17 sheddase activity may contribute to COVID-19 inflammation by cleavage of TNF-α and Interleukin-6 receptor.[16]

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000151694Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000052593Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. S2CID 4251053
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Further reading

External links

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