Visualizing the determinants of viral RNA recognition by innate immune sensor RIG-I.
Visualizing the determinants of viral RNA recognition by innate immune sensor RIG-I.
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DOI:
10.1016/j.str.2012.08.029
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发表时间:
2012-11-07
期刊:
影响因子:
5.7
通讯作者:
Pyle, Anna Marie
中科院分区:
文献类型:
--
作者:
Luo, Dahai;Kohlway, Andrew;Vela, Adriana;Pyle, Anna Marie
Retinoic acid inducible gene-I (RIG-I) is a key intracellular immune receptor for pathogenic RNAs, particularly from RNA viruses. Here we report the crystal structure of human RIG-I bound to a 5′tri-phosphorylated RNA hairpin and ADP nucleotide at 2.8Å resolution. The RNA ligand contains all structural features that are essential for optimal recognition by RIG-I, as it mimics the panhandle-like signatures within the genome of negative stranded RNA viruses. RIG-I adopts an intermediate, semi-closed conformation in this product state of ATP hydrolysis. The structure of this complex allows us to visualize the first steps in RIG-I recognition and activation upon viral infection.
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