Genome polyprotein - P27958 (POLG_HCVH)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P27958: 47
Core protein p21: Packages viral RNA to form a viral nucleocapsid, and promotes virion budding. Modulates viral translation initiation by interacting with HCV IRES and 40S ribosomal subunit. Also regulates many host cellular functions such as signaling pathways and apoptosis. Prevents the establishment of cellular antiviral state by blocking the interferon-alpha/beta (IFN-alpha/beta) and IFN-gamma signaling pathways and by inducing human STAT1 degradation (PubMed:23799612). Interacts with, and activates STAT3 leading to cellular transformation. Represses cell cycle negative regulating factor CDKN1A, thereby interrupting an important check point of normal cell cycle regulation. Targets transcription factors involved in the regulation of inflammatory responses and in the immune response: suppresses NK-kappaB activation, and activates AP-1. Enhances TRAIL mediated apoptosis, suggesting that it might play a role in immune-mediated liver cell injury. Seric core protein is able to bind C1QR1 at the T-cell surface, resulting in down-regulation of T-lymphocytes proliferation (PubMed:11086025). Alters lipid metabolism by interacting with hepatocellular proteins involved in lipid accumulation and storage. Induces up-regulation of FAS promoter activity, and thereby contributes to the increased triglyceride accumulation in hepatocytes (steatosis) (PubMed:14602201). UniProt
Catalytic Activity
ATP + H2O = ADP + phosphate. UniProt
Pathway Maps
      ESCHER  BiGG
Subunit Structure
Core protein p21: Homooligomer (PubMed:25351725). Interacts with the C-terminal part of E1 (PubMed:8764026). Interacts (via N-terminus) with host STAT1; this interaction results in decreased STAT1 phosphorylation, leading to decreased IFN-stimulated gene transcription (PubMed:23799612). Interacts with and constitutively activates human STAT3. Associates with human LTBR and TNFRSF1A receptors and possibly induces apoptosis. Binds to human SP110 isoform 3/Sp110b, HNRPK, YWHAE, UBE3A/E6AP, DDX3X, APOA2 and RXRA proteins. Interacts with human cytokeratins KRT8, KRT18, KRT19 and VIM/vimentin. Interacts with human ACY3 (PubMed:19486448). Interacts with host C1QR1 (PubMed:11086025). Envelope glycoprotein E1: Forms a heterodimer with envelope glycoprotein E2 that binds to human LDLR, CLDN1, CD81 and SCARB1 receptors (PubMed:12970454, PubMed:12615904, PubMed:12913001). Interacts with core protein p21 (PubMed:8764026). Envelope glycoprotein E2: Forms a heterodimer with envelope glycoprotein E1 that binds to human LDLR, CLDN1, CD81 and SCARB1 receptors. Interacts with and inhibits host EIF2AK2/PKR. Interacts with host CD209/DC-SIGN and CLEC4M/DC-SIGNR (PubMed:15371595). Viroporin p7: forms a homohexamer (PubMed:12560074). Protease NS2-3: Forms a homodimer containing a pair of composite active sites at the dimerization interface. Serine protease NS3: Interacts with host TANK-binding kinase/TBK1 and MAVS (PubMed:16301520). Interacts with non-structural protein 4A (PubMed:8861917). Non-structural protein 4A: Interacts with NS3 serine protease and stabilizes its folding. NS3-NS4A complex is essential for the activation of the latter and allows membrane anchorage of NS3. Non-structural protein NS4B: Homomultimerizes (PubMed:23868571). Interacts with non-structural protein NS5A (PubMed:23868571). Non-structural protein NS5A: Interacts with host EIF2AK2/PKR, FKBP8, GRB2, BIN1, PIK3R1, SRCAP, VAPB and with most Src-family kinases (PubMed:16951545, PubMed:10702287, PubMed:16530520). Interacts with host IFI27 and SKP2; promotes the ubiquitin-mediated proteasomal degradation of NS5A (PubMed:27194766). Interacts with non-structural protein NS4B (PubMed:23868571). RNA-directed RNA polymerase: Homooligomer. Interacts with host VAPB, HNRNPA1 and SEPT6. Interacts with host PKN2 (PubMed:15364941). Interacts with host HNRNPA1 and SEPT6 (PubMed:17229681). UniProt
Serine protease NS3: The N-terminal contains the protease activity. This region contains a zinc atom that does not belong to the active site, but may play a structural rather than a catalytic role. This region is essential for the activity of protease NS2-3, maybe by contributing to the folding of the latter. The helicase activity is located in the C-terminus of NS3. UniProt
  • Organism: isolate 1
  • Length:
  • UniProt
  • Isoforms: 2 , currently showing only the 'canonical' sequence.
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