Cyclic GMP-AMP synthase

cGAS complexed with dsDNA (based on PDB 4O6A)
Identifiers
EC no.2.7.7.86
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
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PMCarticles
PubMedarticles
NCBIproteins
cGAS dimer, human
cGAS-cGAMP-STING pathway

Cyclic GMP-AMP synthase (cGAS, cGAMP synthase), belonging to the nucleotidyltransferase family, is a cytosolic DNA sensor that activates a type-I interferon response. It is part of the cGAS-STING DNA sensing pathway. It binds to microbial DNA as well as self DNA that invades the cytoplasm, and catalyzes cGAMP synthesis.[1] cGAMP then functions as a second messenger that binds to and activates the endoplasmic reticulum protein STING to trigger type-I IFNs production.[2][3][4] Mice lacking cGAS are more vulnerable to lethal infection by DNA viruses and RNA viruses.[5][6] In addition, cGAS has been shown to be an innate immune sensor of retroviruses including HIV.[7][8] The human gene encoding cGAS is MB21D1 on chromosome 6.

References

  1. ^ Sun L, Wu J, Du F, Chen X, Chen ZJ (February 2013). "Cyclic GMP-AMP synthase is a cytosolic DNA sensor that activates the type I interferon pathway". Science. 339 (6121): 786–91. Bibcode:2013Sci...339..786S. doi:10.1126/science.1232458. PMC 3863629. PMID 23258413.
  2. ^ Wu J, Sun L, Chen X, Du F, Shi H, Chen C, Chen ZJ (February 2013). "Cyclic GMP-AMP is an endogenous second messenger in innate immune signaling by cytosolic DNA". Science. 339 (6121): 826–30. Bibcode:2013Sci...339..826W. doi:10.1126/science.1229963. PMC 3855410. PMID 23258412.
  3. ^ Gao P, Ascano M, Wu Y, Barchet W, Gaffney BL, Zillinger T, et al. (May 2013). "Cyclic [G(2',5')pA(3',5')p] is the metazoan second messenger produced by DNA-activated cyclic GMP-AMP synthase". Cell. 153 (5): 1094–107. doi:10.1016/j.cell.2013.04.046. PMC 4382009. PMID 23647843.
  4. ^ Zhang X, Shi H, Wu J, Zhang X, Sun L, Chen C, Chen ZJ (July 2013). "Cyclic GMP-AMP containing mixed phosphodiester linkages is an endogenous high-affinity ligand for STING". Molecular Cell. 51 (2): 226–35. doi:10.1016/j.molcel.2013.05.022. PMC 3808999. PMID 23747010.
  5. ^ Li XD, Wu J, Gao D, Wang H, Sun L, Chen ZJ (September 2013). "Pivotal roles of cGAS-cGAMP signaling in antiviral defense and immune adjuvant effects". Science. 341 (6152): 1390–4. Bibcode:2013Sci...341.1390L. doi:10.1126/science.1244040. PMC 3863637. PMID 23989956.
  6. ^ Yu P, Miao Z, Li Y, Bansal R, Peppelenbosch MP, Pan Q (January 2021). "cGAS-STING effectively restricts murine norovirus infection but antagonizes the antiviral action of N-terminus of RIG-I in mouse macrophages". Gut Microbes. 13 (1): 1959839. doi:10.1080/19490976.2021.1959839. PMC 8344765. PMID 34347572.
  7. ^ Gao D, Wu J, Wu YT, Du F, Aroh C, Yan N, et al. (August 2013). "Cyclic GMP-AMP synthase is an innate immune sensor of HIV and other retroviruses". Science. 341 (6148): 903–6. Bibcode:2013Sci...341..903G. doi:10.1126/science.1240933. PMC 3860819. PMID 23929945.
  8. ^ Lahaye X, Satoh T, Gentili M, Cerboni S, Conrad C, Hurbain I, et al. (December 2013). "The capsids of HIV-1 and HIV-2 determine immune detection of the viral cDNA by the innate sensor cGAS in dendritic cells". Immunity. 39 (6): 1132–42. doi:10.1016/j.immuni.2013.11.002. PMID 24269171.

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