Preference of RIG-I for short viral RNA molecules in infected cells revealed by next-generation sequencing
Preference of RIG-I for short viral RNA molecules in infected cells revealed by next-generation sequencing
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DOI：
10.4161/viru.2.2.15481
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发表时间：
2011-03-01
期刊：
影响因子：
5.2
通讯作者：
Garcia-Sastre, Adolfo
中科院分区：
文献类型：
--
作者：
Baum, Alina;Garcia-Sastre, Adolfo
Retinoic acid inducible gene I (RIG-I) is a pattern recognition receptor (PRR) responsible for detection of nucleic acids from pathogens in the cytoplasm of infected cells and induction of type I interferon (IFN). RIG-I-specific pathogen associated molecular patterns (PAMPs) are characterized by RNA molecules with a 5'-triphosphate (5'-ppp) group and partial double-stranded composition. Although many RNA molecules capable of activating RIG-I have been described, the exact nature of viral RNAs that are responsible for triggering RIG-I activity during the course of an infection has not been extensively explored and the specificity of RIG-I for various viral RNA molecules remains largely unknown. By examining endogenous RIG-I/RNA complexes in influenza virus-and Sendai virus-infected cells we were able to identify viral RNA molecules that specifically associated with RIG-I during infection. We showed that in Sendai virus-infected cells, RIG-I specifically and preferentially associated with the copy-back defective interfering (DI) particle RNA and not with the full-length Sendai virus genome or Sendai virus encoded mRNAs. In influenza virus-infected cells RIG-I also preferentially associated with DI RNAs as well as with the shorter genomic segments.
