======= MB21D1 ======= == Gene Information == * **Official Symbol**: CGAS * **Official Name**: cyclic GMP-AMP synthase * **Aliases and Previous Symbols**: N/A * **Entrez ID**: [[https://www.ncbi.nlm.nih.gov/gene/?term=115004|115004]] * **UniProt**: [[https://www.uniprot.org/uniprot/Q8N884|Q8N884]] * **Interactions**: [[https://thebiogrid.org/search.php?search=MB21D1&organism=9606|BioGRID]] * **PubMed articles**: [[https://www.ncbi.nlm.nih.gov/pubmed/?term=gene%20MB21D1|Open PubMed]] * **OMIM**: [[https://omim.org/entry/613973|Open OMIM]] == Function Summary == * **Entrez Summary**: N/A * **UniProt Summary**: Nucleotidyltransferase that catalyzes the formation of cyclic GMP-AMP (cGAMP) from ATP and GTP (PubMed:23258413, PubMed:23707061, PubMed:23722159, PubMed:24077100, PubMed:25131990). Catalysis involves both the formation of a 2',5' phosphodiester linkage at the GpA step and the formation of a 3',5' phosphodiester linkage at the ApG step, producing c[G(2',5')pA(3',5')p] (PubMed:28363908, PubMed:28214358). Acts as a key cytosolic DNA sensor, the presence of double-stranded DNA (dsDNA) in the cytoplasm being a danger signal that triggers the immune responses (PubMed:28363908). Binds cytosolic DNA directly, leading to activation and synthesis of cGAMP, a second messenger that binds to and activates TMEM173/STING, thereby triggering type-I interferon production (PubMed:28363908, PubMed:28314590). Has antiviral activity by sensing the presence of dsDNA from DNA viruses in the cytoplasm (PubMed:28363908). Also acts as an innate immune sensor of infection by retroviruses, such as HIV-1, by detecting the presence of reverse-transcribed DNA in the cytosol (PubMed:23929945). Detection of retroviral reverse-transcribed DNA in the cytosol may be indirect and be mediated via interaction with PQBP1, which directly binds reverse-transcribed retroviral DNA (PubMed:26046437). Also detects the presence of DNA from bacteria, such as M.tuberculosis (PubMed:26048138). cGAMP can be transferred from producing cells to neighboring cells through gap junctions, leading to promote TMEM173/STING activation and convey immune response to connecting cells (PubMed:24077100). cGAMP can also be transferred between cells by virtue of packaging within viral particles contributing to IFN-induction in newly infected cells in a cGAS-independent but TMEM173/STING-dependent manner (PubMed:26229115). In addition to antiviral activity, also involved in the response to cellular stresses, such as senescence, DNA damage or genome instability (PubMed:28738408, PubMed:28759889). Acts as a regulator of cellular senescence by binding to cytosolic chromatin fragments that are present in senescent cells, leading to trigger type-I interferon production via TMEM173/STING and promote cellular senescence (By similarity). Also involved in the inflammatory response to genome instability and double-stranded DNA breaks: acts by localizing to micronuclei arising from genome instability (PubMed:28738408, PubMed:28759889). Micronuclei, which as frequently found in cancer cells, consist of chromatin surrounded by its own nuclear membrane: following breakdown of the micronuclear envelope, a process associated with chromothripsis, CGAS binds self-DNA exposed to the cytosol, leading to cGAMP synthesis and subsequent activation of TMEM173/STING and type-I interferon production (PubMed:28738408, PubMed:28759889). {ECO:0000250|UniProtKB:Q8C6L5, ECO:0000269|PubMed:21478870, ECO:0000269|PubMed:23258413, ECO:0000269|PubMed:23707061, ECO:0000269|PubMed:23707065, ECO:0000269|PubMed:23722159, ECO:0000269|PubMed:23929945, ECO:0000269|PubMed:24077100, ECO:0000269|PubMed:24116191, ECO:0000269|PubMed:24462292, ECO:0000269|PubMed:25131990, ECO:0000269|PubMed:26046437, ECO:0000269|PubMed:26048138, ECO:0000269|PubMed:26229115, ECO:0000269|PubMed:26300263, ECO:0000269|PubMed:28214358, ECO:0000269|PubMed:28314590, ECO:0000269|PubMed:28363908, ECO:0000269|PubMed:28738408, ECO:0000269|PubMed:28759889}. |Mab-21| |cyclic-GMP-AMP synthase activity| |positive regulation of cGMP-mediated signaling| |paracrine signaling| |positive regulation of cellular senescence| |regulation of cGMP-mediated signaling| |positive regulation of cell aging| |cellular response to exogenous dsRNA| |determination of adult lifespan| |negative regulation of double-strand break repair via homologous recombination| |cellular response to dsRNA| |positive regulation of cAMP-mediated signaling| |positive regulation of defense response to virus by host| |negative regulation of double-strand break repair| |negative regulation of DNA repair| |multicellular organism aging| |regulation of defense response to virus by host| |regulation of cellular senescence| |response to exogenous dsRNA| |negative regulation of DNA recombination| |regulation of double-strand break repair via homologous recombination| |regulation of cell aging| |regulation of cAMP-mediated signaling| |response to dsRNA| |site of double-strand break| |regulation of immunoglobulin production| |regulation of defense response to virus| |phosphatidylinositol-4,5-bisphosphate binding| |regulation of double-strand break repair| |positive regulation of type I interferon production| |negative regulation of response to DNA damage stimulus| |double-stranded DNA binding| |regulation of DNA recombination| |negative regulation of DNA metabolic process| |regulation of DNA repair| |regulation of type I interferon production| |regulation of production of molecular mediator of immune response| |defense response to virus| |regulation of response to DNA damage stimulus| |activation of innate immune response| |aging| |response to virus| |regulation of T cell activation| |positive regulation of innate immune response| |regulation of DNA metabolic process| |positive regulation of response to biotic stimulus| |GTP binding| |chromatin binding| |positive regulation of cytokine production| |regulation of innate immune response| |regulation of immune effector process| |positive regulation of defense response| |DNA repair| |positive regulation of multi-organism process| |regulation of lymphocyte activation| |regulation of response to biotic stimulus| |cellular response to organic cyclic compound| |regulation of leukocyte activation| |positive regulation of response to external stimulus| |activation of immune response| |regulation of cell activation| |cellular response to nitrogen compound| |regulation of cytokine production| |viral process| |regulation of cellular response to stress| |DNA metabolic process| |regulation of defense response| |innate immune response| |regulation of multi-organism process| |cellular response to DNA damage stimulus| |symbiotic process| |interspecies interaction between organisms| |positive regulation of immune response| |response to organic cyclic compound| |defense response to other organism| |positive regulation of intracellular signal transduction| |response to nitrogen compound| |immune effector process| |regulation of response to external stimulus| |cell-cell signaling| |positive regulation of immune system process| |regulation of immune response| |response to other organism| |response to external biotic stimulus| |response to biotic stimulus| |defense response| |positive regulation of developmental process| |negative regulation of nucleobase-containing compound metabolic process| |DNA binding| |regulation of response to stress| |ATP binding| |negative regulation of response to stimulus| |regulation of immune system process| |positive regulation of signal transduction| |cellular response to stress| |positive regulation of multicellular organismal process| |positive regulation of cell communication| |positive regulation of signaling| |regulation of intracellular signal transduction| |immune response| \\ === CRISPR Data === ^Screen^Score^ |[[:results:exp36|TRAIL 50ng/ml R00 exp36]]|1.78| |[[:results:exp28|Pimelic-diphenylamide-106 5μM R00 exp28]]|1.85| No correlation found to any other genes in chemogenomics. Global Fraction of Cell Lines Where Essential: 0/739 ^Tissue^Fraction Of Cell Lines Where Essential^ |1290807.0|0/1| |909776.0|0/1| |bile duct|0/28| |blood|0/28| |bone|0/26| |breast|0/33| |central nervous system|0/56| |cervix|0/4| |colorectal|0/17| |esophagus|0/13| |fibroblast|0/1| |gastric|0/16| |kidney|0/21| |liver|0/20| |lung|0/75| |lymphocyte|0/16| |ovary|0/26| |pancreas|0/24| |peripheral nervous system|0/16| |plasma cell|0/15| |prostate|0/1| |skin|0/24| |soft tissue|0/9| |thyroid|0/2| |upper aerodigestive|0/22| |urinary tract|0/29| |uterus|0/5| == Essentiality in NALM6 == * **Essentiality Rank**: 9574 * **Expression level (log2 read counts)**: 3.92 {{:chemogenomics:nalm6 dist.png?nolink |}}