The structural basis of 5' triphosphate double-stranded RNA recognition by RIG-I C-terminal domain.
The structural basis of 5' triphosphate double-stranded RNA recognition by RIG-I C-terminal domain.
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DOI:
10.1016/j.str.2010.05.007
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发表时间:
2010-08-11
期刊:
影响因子:
--
通讯作者:
Li P
中科院分区:
文献类型:
--
作者:
Lu C;Xu H;Ranjith-Kumar CT;Brooks MT;Hou TY;Hu F;Herr AB;Strong RK;Kao CC;Li P
RIG-I is a cytosolic sensor of viral RNA that plays crucial roles in the induction of type I interferons. The C-terminal domain (CTD) of RIG-I is responsible for the recognition of viral RNA with 5′ triphosphate (5′ ppp). However, the mechanism of viral RNA recognition by RIG-I is still not fully understood. Here we show that RIG-I CTD binds 5′ ppp dsRNA or ssRNA, as well as blunt-ended dsRNA, and exhibits the highest affinity for 5′ ppp dsRNA. Crystal structures of RIG-I CTD bound to 5′ ppp dsRNA with GC- and AU- rich sequences revealed that RIG-I recognizes the termini of the dsRNA and interacts with the 5′ triphosphate through extensive electrostatic interactions. Mutagenesis and RNA binding studies demonstrated that similar binding surfaces are involved in the recognition of different forms of RNA. Mutations of key residues at the RNA binding surface affected RIG-I signaling in cells.
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影响因子:
14.9
作者:
Pippig DA;Hellmuth JC;Cui S;Kirchhofer A;Lammens K;Lammens A;Schmidt A;Rothenfusser S;Hopfner KP
通讯作者:
Hopfner KP
影响因子:
3.9
作者:
Li, Xiaojun;Lu, Cheng;Li, Pingwei
通讯作者:
Li, Pingwei
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作者:
Pichlmair, Andreas;Schulz, Oliver;Sousa, Caetano Reis E.
通讯作者:
Sousa, Caetano Reis E.
DOI:
10.1073/pnas.0912986107
发表时间:
2010-01-26
影响因子:
11.1
作者:
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通讯作者:
Takeuchi, Osamu
影响因子:
64.8
作者:
Saito, Takeshi;Owen, David M.;Gale, Michael, Jr.
通讯作者:
Gale, Michael, Jr.