title: Molecular and structural characterization of the domain 2 of hepatitis C virus non-structural protein 5A.
abstract: Hepatitis C virus (HCV) non-structural protein 5A protein (NS5A), which consists of three functional domains, is involved in regulating viral replication, interferon resistance, and apoptosis. Recently, the three-dimensional structure of the domain 1 was determined. However, currently the molecular basis for the domains 2 and 3 of HCV NS5A is yet to be defined. Toward this end, we expressed, purified the domain 2 of the NS5A (NS5A-D2), and then performed biochemical and structural studies. The purified domain 2 was active and was able to bind NS5B and PKR, biological partners of NS5A. The results from gel filtration, CD analysis, 1D 1H NMR and 2D 1H-15N heteronuclear single quantum correlation (HSQC) spectroscopy indicate that the domain 2 of NS5A appears to be flexible and disordered.
authors.affiliation: Division of Structural and Computational Biology, School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637511, Singapore.
authors.forename: Yu
authors.initials: Y
authors.lastname: Liang
authors.forename: Cong Bao
authors.initials: CB
authors.lastname: Kang
authors.forename: Ho Sup
authors.initials: HS
authors.lastname: Yoon
mesh_terms: D000595:Amino Acid Sequence; D002850:Chromatography, Gel; D002942:Circular Dichroism; D016174:Hepacivirus / Q000737:chemistry*; D008024:Ligands; D008969:Molecular Sequence Data; D019906:Nuclear Magnetic Resonance, Biomolecular; D011487:Protein Conformation; D017434:Protein Structure, Tertiary; D017361:Viral Nonstructural Proteins / Q000737:chemistry* / Q000302:isolation & purification; D012324:RNA-Dependent RNA Polymerase
chemical_list: D008024:Ligands; D017361:Viral Nonstructural Proteins; C087036:NS-5 protein, hepatitis C virus; D012324:RNA-Dependent RNA Polymerase