Nuclear cGAS: sequestration and beyond
Received date: 05 Jul 2021
Accepted date: 21 Jul 2021
Published date: 15 Feb 2022
Copyright
The cyclic GMP-AMP (cGAMP) synthase (cGAS) has been identified as a cytosolic double stranded DNA sensor that plays a pivotal role in the type I interferon and inflammation responses via the STING-dependent signaling pathway. In the past several years, a growing body of evidence has revealed that cGAS is also localized in the nucleus where it is associated with distinct nuclear substructures such as nucleosomes, DNA replication forks, the double-stranded breaks, and centromeres, suggesting that cGAS may have other functions in addition to its role in DNA sensing. However, while the innate immune function of cGAS is well established, the non-canonical nuclear function of cGAS remains poorly understood. Here, we review our current understanding of the complex nature of nuclear cGAS and point to open questions on the novel roles and the mechanisms of action of this protein as a key regulator of cell nuclear function, beyond its well-established role in dsDNA sensing and innate immune response.
Key words: cGAS; STING; innate immunity; nuclear translocation; DNA damage repair; micronuclei
Juli Bai , Feng Liu . Nuclear cGAS: sequestration and beyond[J]. Protein & Cell, 2022 , 13(2) : 90 -101 . DOI: 10.1007/s13238-021-00869-0
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