Abstract
Retinoic acid inducible gene-I (RIG-I) is an essential component of the innate immune system that is responsible for the detection and elimination of invading viruses. RIG-I recognizes viral RNAs inside the cell and then initiates downstream signalling to activate the IRF-3 and NF-kappaB genes, which results in the production of type I interferons. RIG-I is composed of an N-terminal CARD domain for signalling and C-terminal helicase and repressor domains for RNA recognition. A RIG-I-RNA binding assay was performed to investigate the in vitro RIG-I-RNA binding properties. Selenomethionine-incorporated RIG-I was expressed using Escherichia coli and purified for crystallization. X-ray data were collected from RIG-I-dsRNA complex crystals to 2.8 A resolution using synchrotron radiation.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Amino Acid Sequence
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Cloning, Molecular
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Crystallization
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Crystallography, X-Ray*
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DEAD Box Protein 58
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DEAD-box RNA Helicases / chemistry
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DEAD-box RNA Helicases / genetics
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DEAD-box RNA Helicases / isolation & purification
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DEAD-box RNA Helicases / metabolism*
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Data Collection
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Escherichia coli / genetics
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Ethidium / metabolism
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Fluorescent Dyes / metabolism
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Histidine / chemistry
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Humans
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Hydrogen-Ion Concentration
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Molecular Sequence Data
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Protein Binding
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Protein Structure, Tertiary
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RNA, Double-Stranded / metabolism*
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Receptors, Immunologic
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Statistics as Topic
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Synchrotrons
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Temperature
Substances
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Fluorescent Dyes
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RNA, Double-Stranded
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Receptors, Immunologic
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Histidine
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RIGI protein, human
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DEAD Box Protein 58
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DEAD-box RNA Helicases
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Ethidium