Targeting the viral Achilles' heel: recognition of 5'-triphosphate RNA in innate anti-viral defence.

Abstract:

:Some RNA virus genomes bear 5'-triphosphates, which can be recognized in the cytoplasm of infected cells by host proteins that mediate anti-viral immunity. Both the innate sensor RIG-I and the interferon-induced IFIT proteins bind to 5'-triphosphate viral RNAs. RIG-I signals for induction of interferons during RNA virus infection while IFITs sequester viral RNAs to exert an anti-viral effect. Notably, the structures of these proteins reveal both similarities and differences, which are suggestive of independent evolution towards ligand binding. 5'-triphosphates, which are absent from most RNAs in the cytosol of uninfected cells, are thus a marker of virus infection that is targeted by the innate immune system for both induction and execution of the anti-viral response.

journal_name

Curr Opin Microbiol

authors

Rehwinkel J,Reis e Sousa C

doi

10.1016/j.mib.2013.04.009

subject

Has Abstract

pub_date

2013-08-01 00:00:00

pages

485-92

issue

4

eissn

1369-5274

issn

1879-0364

pii

S1369-5274(13)00066-0

journal_volume

16

pub_type

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