Unknown

Dataset Information

0

Hepatitis C virus RNA replication is regulated by FKBP8 and Hsp90.


ABSTRACT: Hepatitis C virus (HCV) nonstructural protein 5A (NS5A) is a component of viral replicase and is well known to modulate the functions of several host proteins. Here, we show that NS5A specifically interacts with FKBP8, a member of the FK506-binding protein family, but not with other homologous immunophilins. Three sets of tetratricopeptide repeats in FKBP8 are responsible for interactions with NS5A. The siRNA-mediated knockdown of FKBP8 in a human hepatoma cell line harboring an HCV RNA replicon suppressed HCV RNA replication, and this reduction was reversed by the expression of an siRNA-resistant FKBP8 mutant. Furthermore, immunoprecipitation analyses revealed that FKBP8 forms a complex with Hsp90 and NS5A. Treatment of HCV replicon cells with geldanamycin, an inhibitor of Hsp90, suppressed RNA replication in a dose-dependent manner. These results suggest that the complex consisting of NS5A, FKBP8, and Hsp90 plays an important role in HCV RNA replication.

SUBMITTER: Okamoto T 

PROVIDER: S-EPMC1618089 | biostudies-literature | 2006 Oct

REPOSITORIES: biostudies-literature

altmetric image

Publications

Hepatitis C virus RNA replication is regulated by FKBP8 and Hsp90.

Okamoto Toru T   Nishimura Yorihiro Y   Ichimura Tohru T   Suzuki Kensuke K   Miyamura Tatsuo T   Suzuki Tetsuro T   Moriishi Kohji K   Matsuura Yoshiharu Y  

The EMBO journal 20061005 20


Hepatitis C virus (HCV) nonstructural protein 5A (NS5A) is a component of viral replicase and is well known to modulate the functions of several host proteins. Here, we show that NS5A specifically interacts with FKBP8, a member of the FK506-binding protein family, but not with other homologous immunophilins. Three sets of tetratricopeptide repeats in FKBP8 are responsible for interactions with NS5A. The siRNA-mediated knockdown of FKBP8 in a human hepatoma cell line harboring an HCV RNA replicon  ...[more]

Similar Datasets

| S-EPMC549027 | biostudies-literature
| S-EPMC3365724 | biostudies-literature
| S-EPMC3338857 | biostudies-literature
| S-EPMC109725 | biostudies-literature
| S-EPMC3427374 | biostudies-literature
| S-EPMC10436323 | biostudies-literature
| S-EPMC7165973 | biostudies-literature
| S-EPMC6800943 | biostudies-literature
| S-EPMC2258944 | biostudies-literature
| S-EPMC6450126 | biostudies-literature