HuR, a protein implicated in oncogene and growth factor mRNA decay, binds to the 3' ends of hepatitis C virus RNA of both polarities.

Abstract:

:To identify cellular factors that interact with hepatitis C virus RNA, cellular extracts were subjected to UV cross-linking to radiolabeled RNAs corresponding to the hepatitis C virus 5' and 3' untranslated regions of positive and negative polarities. Our results demonstrate that the U-rich region of the hepatitis C virus 3' untranslated region of the positive RNA strand is a hot spot for cellular RNA binding proteins. Two of these proteins were identified as the ELAV-like HuR protein and hnRNP C. Interestingly, HuR and hnRNP C also interacted with the 3' end of the RNA representing the negative strand of the HCV genome. The binding of HuR and hnRNP C to the 3' ends of the HCV RNAs of both negative and positive polarities suggests that HuR and hnRNP C may be involved in the transcription of the HCV RNA genome. Alternatively, they act by protecting the HCV RNAs from premature degradation by binding to their 3' ends. However, we were unable to demonstrate an effect on HCV RNA stability by the HuR protein. These interactions may be necessary for the establishment of chronic active infections that may develop into cirrhosis or hepatocellular carcinoma.

journal_name

Virology

journal_title

Virology

authors

Spångberg K,Wiklund L,Schwartz S

doi

10.1006/viro.2000.0461

subject

Has Abstract

pub_date

2000-09-01 00:00:00

pages

378-90

issue

2

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(00)90461-6

journal_volume

274

pub_type

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