Uncoupling of Protease trans -Cleavage and Helicase Activities in Pestivirus NS3
نویسندگان
چکیده
منابع مشابه
The interdomain interface in bifunctional enzyme protein 3/4A (NS3/4A) regulates protease and helicase activities.
Hepatitis C (HCV) protein 3/4A (NS3/4A) is a bifunctional enzyme comprising two separate domains with protease and helicase activities, which are essential for viral propagation. Both domains are stable and have enzymatic activity separately, and the relevance and implications of having protease and helicase together as a single protein remains to be explored. Altered in vitro activities of iso...
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Flaviviral NS3 is a multifunctional protein displaying N-terminal protease activity in addition to C-terminal helicase, nucleoside 5'-triphosphatase (NTPase), and 5'-terminal RNA triphosphatase (RTPase) activities. NS3 is held to support the separation of RNA daughter and template strands during viral replication. In addition, NS3 assists the initiation of replication by unwinding the RNA secon...
متن کاملA method to simultaneously monitor hepatitis C virus NS3 helicase and protease activities.
The hepatitis C virus NS3 protein contains an N-terminal serine protease and a C-terminal helicase that unwinds RNA or DNA duplexes. The HCV NS3 protein is the target for several antiviral drugs in clinical trials, which inhibit the protease function. A method is reported to simultaneously monitor the helicase and protease function of the NS3 protein in a single reaction using fluorescence spec...
متن کاملSimultaneously Targeting the NS3 Protease and Helicase Activities for More Effective Hepatitis C Virus Therapy.
This study examines the specificity and mechanism of action of a recently reported hepatitis C virus (HCV) nonstructural protein 3 (NS3) helicase-protease inhibitor (HPI), and the interaction of HPI with the NS3 protease inhibitors telaprevir, boceprevir, danoprevir, and grazoprevir. HPI most effectively reduced cellular levels of subgenomic genotype 4a replicons, followed by genotypes 3a and 1...
متن کاملX-ray structure of the pestivirus NS3 helicase and its conformation in solution.
UNLABELLED Pestiviruses form a genus in the Flaviviridae family of small enveloped viruses with a positive-sense single-stranded RNA genome. Viral replication in this family requires the activity of a superfamily 2 RNA helicase contained in the C-terminal domain of nonstructural protein 3 (NS3). NS3 features two conserved RecA-like domains (D1 and D2) with ATPase activity, plus a third domain (...
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ژورنال
عنوان ژورنال: Journal of Virology
سال: 2017
ISSN: 0022-538X,1098-5514
DOI: 10.1128/jvi.01094-17