Cyclic GMP-AMP synthase is activated by double-stranded DNA-induced oligomerization.
Cyclic GMP-AMP synthase is activated by double-stranded DNA-induced oligomerization.
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环状GMP-AMP合酶通过双链DNA诱导的寡聚化激活。
DOI:
10.1016/j.immuni.2013.10.019
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发表时间:
2013-12-12
期刊:
影响因子:
32.4
通讯作者:
Li, Pingwei
中科院分区:
文献类型:
--
作者:
Li, Xin;Shu, Chang;Yi, Guanghui;Chaton, Catherine T.;Shelton, Catherine L.;Diao, Jiasheng;Zuo, Xiaobing;Kao, C. Cheng;Herr, Andrew B.;Li, Pingwei
Cyclic GMP-AMP synthase (cGAS) is a cytosolic DNA sensor mediating innate antimicrobial immunity. It catalyzes the synthesis of a noncanonical cyclic dinucleotide 2′,5′ cGAMP that binds to STING and mediates the activation of TBK1 and IRF-3. Activated IRF-3 translocates to the nucleus and initiates the transcription of the IFN-β gene. The structure of mouse cGAS bound to an 18 bp dsDNA revealed that cGAS interacts with dsDNA through two binding sites, forming a 2:2 complex. Enzyme assays and IFN-β reporter assays of cGAS mutants demonstrated that interactions at both DNA binding sites are essential for cGAS activation. Mutagenesis and DNA binding studies showed that the two sites bind dsDNA cooperatively and site B plays a critical role in DNA binding. The structure of mouse cGAS bound to dsDNA and 2′,5′ cGAMP provided insight into the catalytic mechanism of cGAS. These results demonstrated that cGAS is activated by dsDNA-induced oligomerization.
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影响因子:
64.8
作者:
通讯作者:
--
DOI:
10.1126/science.1244040
发表时间:
2013-09-20
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Li XD;Wu J;Gao D;Wang H;Sun L;Chen ZJ
通讯作者:
Chen ZJ
影响因子:
7
作者:
Barber GN
通讯作者:
Barber GN
影响因子:
16.8
作者:
Huang, Yi-He;Liu, Xiang-Yu;Su, Xiao-Dong
通讯作者:
Su, Xiao-Dong
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH