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2014 ; 10
(6
): 1146-7
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Autophagy side of MB21D1/cGAS DNA sensor
#MMPMID24879161
Liang Q
; Seo GJ
; Choi YJ
; Ge J
; Rodgers MA
; Shi M
; Jung JU
Autophagy
2014[Jun]; 10
(6
): 1146-7
PMID24879161
show ga
The MB21D1/cGAS (Mab-21 domain-containing 1/cyclic GMP-AMP [cGAMP] synthetase),
acts as an intracellular pattern recognition receptor (PPR) to sense cytosolic
pathogen DNAs and subsequently generates the second messenger cGAMP to initiate
the TMEM173/STING pathway for interferon (IFN) production. Intriguingly, we have
recently demonstrated crosstalk between the intracellular DNA sensing pathway and
autophagy machinery by demonstrating a direct interaction between the MB21D1 DNA
sensor and the BECN1/Beclin 1 autophagy protein. This interaction not only
suppresses MB21D1 enzymatic activity to halt cGAMP production, but also enhances
the autophagy-mediated degradation of cytosolic microbial DNAs. This demonstrates
that MB21D1 is the molecular link between the intracellular DNA sensing pathway
and the autophagy pathway, ultimately developing well-balanced immune responses
against pathogens.