POLG_HCVGL
ID POLG_HCVGL Reviewed; 829 AA.
AC Q5EG65;
DT 19-JUL-2005, integrated into UniProtKB/Swiss-Prot.
DT 23-JAN-2007, sequence version 3.
DT 03-AUG-2022, entry version 119.
DE RecName: Full=Genome polyprotein;
DE Contains:
DE RecName: Full=Core protein precursor;
DE AltName: Full=Capsid protein C;
DE AltName: Full=p23;
DE Contains:
DE RecName: Full=Mature core protein;
DE AltName: Full=p21;
DE Contains:
DE RecName: Full=Envelope glycoprotein E1;
DE AltName: Full=gp32;
DE AltName: Full=gp35;
DE Contains:
DE RecName: Full=Envelope glycoprotein E2;
DE AltName: Full=NS1;
DE AltName: Full=gp68;
DE AltName: Full=gp70;
DE Contains:
DE RecName: Full=Viroporin p7;
DE Contains:
DE RecName: Full=Protease NS2;
DE Short=p23;
DE EC=3.4.22.- {ECO:0000250|UniProtKB:P26663};
DE AltName: Full=Non-structural protein 2;
DE Short=NS2;
DE Flags: Fragment;
OS Hepatitis C virus (isolate Glasgow) (HCV).
OC Viruses; Riboviria; Orthornavirae; Kitrinoviricota; Flasuviricetes;
OC Amarillovirales; Flaviviridae; Hepacivirus.
OX NCBI_TaxID=329389;
OH NCBI_TaxID=9606; Homo sapiens (Human).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RX PubMed=10423136; DOI=10.1099/0022-1317-80-7-1681;
RA Patel J., Patel A.H., McLauchlan J.;
RT "Covalent interactions are not required to permit or stabilize the non-
RT covalent association of hepatitis C virus glycoproteins E1 and E2.";
RL J. Gen. Virol. 80:1681-1690(1999).
RN [2]
RP INTERACTION WITH HOST DDX3X (MATURE CORE PROTEIN).
RX PubMed=10329544; DOI=10.1006/viro.1999.9659;
RA Owsianka A.M., Patel A.H.;
RT "Hepatitis C virus core protein interacts with a human DEAD box protein
RT DDX3.";
RL Virology 257:330-340(1999).
RN [3]
RP CLEAVAGE BY THE SIGNAL PEPTIDASE (CORE PROTEIN P21), SUBCELLULAR LOCATION,
RP AND MUTAGENESIS OF 180-ALA--CYS-184.
RX PubMed=12145199; DOI=10.1093/emboj/cdf414;
RA McLauchlan J., Lemberg M.K., Hope G., Martoglio B.;
RT "Intramembrane proteolysis promotes trafficking of hepatitis C virus core
RT protein to lipid droplets.";
RL EMBO J. 21:3980-3988(2002).
RN [4]
RP REVIEW.
RX PubMed=10718937; DOI=10.1046/j.1365-2893.2000.00201.x;
RA McLauchlan J.;
RT "Properties of the hepatitis C virus core protein: a structural protein
RT that modulates cellular processes.";
RL J. Viral Hepat. 7:2-14(2000).
RN [5]
RP REVIEW, AND SUBCELLULAR LOCATION.
RX PubMed=14752815; DOI=10.1002/hep.20032;
RA Penin F., Dubuisson J., Rey F.A., Moradpour D., Pawlotsky J.-M.;
RT "Structural biology of hepatitis C virus.";
RL Hepatology 39:5-19(2004).
CC -!- FUNCTION: [Mature core protein]: Packages viral RNA to form a viral
CC nucleocapsid, and promotes virion budding (Probable). Participates in
CC the viral particle production as a result of its interaction with the
CC non-structural protein 5A (By similarity). Binds RNA and may function
CC as a RNA chaperone to induce the RNA structural rearrangements taking
CC place during virus replication (By similarity). Modulates viral
CC translation initiation by interacting with viral IRES and 40S ribosomal
CC subunit (By similarity). Affects various cell signaling pathways, host
CC immunity and lipid metabolism (Probable). Prevents the establishment of
CC cellular antiviral state by blocking the interferon-alpha/beta (IFN-
CC alpha/beta) and IFN-gamma signaling pathways and by blocking the
CC formation of phosphorylated STAT1 and promoting ubiquitin-mediated
CC proteasome-dependent degradation of STAT1 (By similarity). Activates
CC STAT3 leading to cellular transformation (By similarity). Regulates the
CC activity of cellular genes, including c-myc and c-fos (By similarity).
CC May repress the promoter of p53, and sequester CREB3 and SP110 isoform
CC 3/Sp110b in the cytoplasm (By similarity). Represses cell cycle
CC negative regulating factor CDKN1A, thereby interrupting an important
CC check point of normal cell cycle regulation (By similarity). Targets
CC transcription factors involved in the regulation of inflammatory
CC responses and in the immune response: suppresses TNF-induced NF-kappa-B
CC activation, and activates AP-1 (By similarity). Binds to dendritic
CC cells (DCs) via C1QR1, resulting in down-regulation of T-lymphocytes
CC proliferation (By similarity). Alters lipid metabolism by interacting
CC with hepatocellular proteins involved in lipid accumulation and storage
CC (By similarity). Induces up-regulation of FAS promoter activity, and
CC thereby contributes to the increased triglyceride accumulation in
CC hepatocytes (steatosis) (By similarity). {ECO:0000250|UniProtKB:P26662,
CC ECO:0000250|UniProtKB:P26664, ECO:0000250|UniProtKB:P27958,
CC ECO:0000250|UniProtKB:P29846, ECO:0000250|UniProtKB:Q99IB8,
CC ECO:0000305}.
CC -!- FUNCTION: [Envelope glycoprotein E1]: Forms a heterodimer with envelope
CC glycoprotein E2, which mediates virus attachment to the host cell,
CC virion internalization through clathrin-dependent endocytosis and
CC fusion with host membrane (By similarity). Fusion with the host cell is
CC most likely mediated by both E1 and E2, through conformational
CC rearrangements of the heterodimer required for fusion rather than a
CC classical class II fusion mechanism (By similarity). E1/E2 heterodimer
CC binds host apolipoproteins such as APOB and ApoE thereby forming a
CC lipo-viro-particle (LVP) (By similarity). APOE associated to the LVP
CC allows the initial virus attachment to cell surface receptors such as
CC the heparan sulfate proteoglycans (HSPGs), syndecan-1 (SDC1), syndecan-
CC 1 (SDC2), the low-density lipoprotein receptor (LDLR) and scavenger
CC receptor class B type I (SCARB1) (By similarity). The cholesterol
CC transfer activity of SCARB1 allows E2 exposure and binding of E2 to
CC SCARB1 and the tetraspanin CD81 (By similarity). E1/E2 heterodimer
CC binding on CD81 activates the epithelial growth factor receptor (EGFR)
CC signaling pathway (By similarity). Diffusion of the complex E1-E2-EGFR-
CC SCARB1-CD81 to the cell lateral membrane allows further interaction
CC with Claudin 1 (CLDN1) and occludin (OCLN) to finally trigger HCV entry
CC (By similarity). {ECO:0000250|UniProtKB:P27958}.
CC -!- FUNCTION: [Envelope glycoprotein E2]: Forms a heterodimer with envelope
CC glycoprotein E1, which mediates virus attachment to the host cell,
CC virion internalization through clathrin-dependent endocytosis and
CC fusion with host membrane (By similarity). Fusion with the host cell is
CC most likely mediated by both E1 and E2, through conformational
CC rearrangements of the heterodimer required for fusion rather than a
CC classical class II fusion mechanism (By similarity). The interaction
CC between envelope glycoprotein E2 and host apolipoprotein E/APOE allows
CC the proper assembly, maturation and infectivity of the viral particles
CC (By similarity). This interaction is probably promoted via the up-
CC regulation of cellular autophagy by the virus (By similarity). E1/E2
CC heterodimer binds host apolipoproteins such as APOB and APOE thereby
CC forming a lipo-viro-particle (LVP) (By similarity). APOE associated to
CC the LVP allows the initial virus attachment to cell surface receptors
CC such as the heparan sulfate proteoglycans (HSPGs), syndecan-1 (SDC1),
CC syndecan-1 (SDC2), the low-density lipoprotein receptor (LDLR) and
CC scavenger receptor class B type I (SCARB1) (By similarity). The
CC cholesterol transfer activity of SCARB1 allows E2 exposure and binding
CC of E2 to SCARB1 and the tetraspanin CD81 (By similarity). E1/E2
CC heterodimer binding on CD81 activates the epithelial growth factor
CC receptor (EGFR) signaling pathway (By similarity). Diffusion of the
CC complex E1-E2-EGFR-SCARB1-CD81 to the cell lateral membrane allows
CC further interaction with Claudin 1 (CLDN1) and occludin (OCLN) to
CC finally trigger HCV entry (By similarity). Inhibits host EIF2AK2/PKR
CC activation, preventing the establishment of an antiviral state (By
CC similarity). Viral ligand for CD209/DC-SIGN and CLEC4M/DC-SIGNR, which
CC are respectively found on dendritic cells (DCs), and on liver
CC sinusoidal endothelial cells and macrophage-like cells of lymph node
CC sinuses (By similarity). These interactions allow the capture of
CC circulating HCV particles by these cells and subsequent facilitated
CC transmission to permissive cells such as hepatocytes and lymphocyte
CC subpopulations (By similarity). {ECO:0000250|UniProtKB:P26664,
CC ECO:0000250|UniProtKB:P27958}.
CC -!- FUNCTION: [Viroporin p7]: Ion channel protein that acts as a viroporin
CC and plays an essential role in the assembly, envelopment and secretion
CC of viral particles (By similarity). Regulates the host cell secretory
CC pathway, which induces the intracellular retention of viral
CC glycoproteins and favors assembly of viral particles (By similarity).
CC Creates a pore in acidic organelles and releases Ca(2+) and H(+) in the
CC cytoplasm of infected cells, leading to a productive viral infection
CC (By similarity). High levels of cytoplasmic Ca(2+) may trigger membrane
CC trafficking and transport of viral ER-associated proteins to
CC viroplasms, sites of viral genome replication (Probable). This ionic
CC imbalance induces the assembly of the inflammasome complex, which
CC triggers the maturation of pro-IL-1beta into IL-1beta through the
CC action of caspase-1 (By similarity). Targets also host mitochondria and
CC induces mitochondrial depolarization (By similarity). In addition of
CC its role as a viroporin, acts as a lipid raft adhesion factor (By
CC similarity). {ECO:0000250|UniProtKB:P27958,
CC ECO:0000250|UniProtKB:Q99IB8, ECO:0000305}.
CC -!- FUNCTION: [Protease NS2]: Cysteine protease required for the
CC proteolytic auto-cleavage between the non-structural proteins NS2 and
CC NS3 (By similarity). The N-terminus of NS3 is required for the function
CC of NS2 protease (active region NS2-3) (By similarity). Promotes the
CC initiation of viral particle assembly by mediating the interaction
CC between structural and non-structural proteins (By similarity).
CC {ECO:0000250|UniProtKB:P26663, ECO:0000250|UniProtKB:P27958}.
CC -!- COFACTOR: [Protease NS2]:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000250|UniProtKB:P26663};
CC Note=Activity of protease NS2 is dependent on zinc ions and completely
CC inhibited by EDTA. This is probably due to the fact that NS2 protease
CC activity needs NS3 N-terminus that binds a zinc atom (active region
CC NS2-3). {ECO:0000250|UniProtKB:P26663};
CC -!- ACTIVITY REGULATION: [Viroporin p7]: Inhibited by the antiviral drug
CC hexamethylene amiloride (By similarity). Inhibition by amantadine
CC appears to be genotype-dependent (By similarity). Also inhibited by
CC long-alkyl-chain iminosugar derivatives (By similarity).
CC {ECO:0000250|UniProtKB:P26662, ECO:0000250|UniProtKB:P27958}.
CC -!- SUBUNIT: [Mature core protein]: Homooligomer (By similarity). Interacts
CC with E1 (via C-terminus) (By similarity). Interacts with the non-
CC structural protein 5A (By similarity). Interacts (via N-terminus) with
CC host STAT1 (via SH2 domain); this interaction results in decreased
CC STAT1 phosphorylation and ubiquitin-mediated proteasome-dependent STAT1
CC degradation, leading to decreased IFN-stimulated gene transcription (By
CC similarity). Interacts with host STAT3; this interaction constitutively
CC activates STAT3 (By similarity). Interacts with host LTBR receptor (By
CC similarity). Interacts with host TNFRSF1A receptor and possibly induces
CC apoptosis (By similarity). Interacts with host HNRPK (By similarity).
CC Interacts with host YWHAE (By similarity). Interacts with host
CC UBE3A/E6AP (By similarity). Interacts with host DDX3X
CC (PubMed:10329544). Interacts with host APOA2 (By similarity). Interacts
CC with host RXRA protein (By similarity). Interacts with host SP110
CC isoform 3/Sp110b; this interaction sequesters the transcriptional
CC corepressor SP110 away from the nucleus (By similarity). Interacts with
CC host CREB3 nuclear transcription protein; this interaction triggers
CC cell transformation (By similarity). Interacts with host ACY3 (By
CC similarity). Interacts with host C1QR1 (By similarity). Interacts with
CC host RBM24; this interaction, which enhances the interaction of the
CC mature core protein with 5'-UTR, may inhibit viral translation and
CC favor replication (By similarity). Interacts with host EIF2AK2/PKR;
CC this interaction induces the autophosphorylation of EIF2AK2 (By
CC similarity). Part of the viral assembly initiation complex composed of
CC NS2, E1, E2, NS3, NS4A, NS5A and the mature core protein (By
CC similarity). {ECO:0000250|UniProtKB:P26662,
CC ECO:0000250|UniProtKB:P26664, ECO:0000250|UniProtKB:P27958,
CC ECO:0000250|UniProtKB:P29846, ECO:0000250|UniProtKB:Q03463,
CC ECO:0000250|UniProtKB:Q99IB8, ECO:0000269|PubMed:10329544}.
CC -!- SUBUNIT: [Envelope glycoprotein E1]: Forms a heterodimer with envelope
CC glycoprotein E2 (By similarity). Interacts with mature core protein (By
CC similarity). Interacts with protease NS2 (By similarity). The
CC heterodimer E1/E2 interacts with host CLDN1; this interaction plays a
CC role in viral entry into host cell (By similarity). Interacts with host
CC SPSB2 (via C-terminus) (By similarity). Part of the viral assembly
CC initiation complex composed of NS2, E1, E2, NS3, NS4A, NS5A and the
CC mature core protein (By similarity). {ECO:0000250|UniProtKB:P27958,
CC ECO:0000250|UniProtKB:Q99IB8}.
CC -!- SUBUNIT: [Envelope glycoprotein E2]: Forms a heterodimer with envelope
CC glycoprotein E1 (By similarity). Interacts with host CD81 and SCARB1
CC receptors; these interactions play a role in viral entry into host cell
CC (By similarity). Interacts with host EIF2AK2/PKR; this interaction
CC inhibits EIF2AK2 and probably allows the virus to evade the innate
CC immune response (By similarity). Interacts with host CD209/DC-SIGN and
CC CLEC4M/DC-SIGNR (By similarity). Interact with host SPCS1; this
CC interaction is essential for viral particle assembly (By similarity).
CC Interacts with protease NS2 (By similarity). The heterodimer E1/E2
CC interacts with host CLDN1; this interaction plays a role in viral entry
CC into host cell (By similarity). Part of the viral assembly initiation
CC complex composed of NS2, E1, E2, NS3, NS4A, NS5A and the mature core
CC protein (By similarity). {ECO:0000250|UniProtKB:P27958,
CC ECO:0000250|UniProtKB:Q99IB8}.
CC -!- SUBUNIT: [Viroporin p7]: Homohexamer (By similarity). Homoheptamer (By
CC similarity). Interacts with protease NS2 (By similarity).
CC {ECO:0000250|UniProtKB:O92972, ECO:0000250|UniProtKB:P27958,
CC ECO:0000250|UniProtKB:Q99IB8}.
CC -!- SUBUNIT: [Protease NS2]: Homodimer (By similarity). Interacts with host
CC SPCS1; this interaction is essential for viral particle assembly (By
CC similarity). Interacts with envelope glycoprotein E1 (By similarity).
CC Interacts with envelope glycoprotein E2 (By similarity). Interacts with
CC viroporin p7 (By similarity). Interacts with serine protease/helicase
CC NS3 (By similarity). Part of the replication complex composed of NS2,
CC NS3, NS4A, NS4B, NS5A and the RNA-directed RNA polymerase embedded in
CC an ER-derived membranous web (By similarity). Part of the viral
CC assembly initiation complex composed of NS2, E1, E2, NS3, NS4A, NS5A
CC and the mature core protein (By similarity).
CC {ECO:0000250|UniProtKB:P27958, ECO:0000250|UniProtKB:Q99IB8}.
CC -!- INTERACTION:
CC PRO_0000037559; O00571: DDX3X; Xeno; NbExp=4; IntAct=EBI-9254385, EBI-353779;
CC -!- SUBCELLULAR LOCATION: [Core protein precursor]: Host endoplasmic
CC reticulum membrane {ECO:0000250|UniProtKB:P26664}; Single-pass membrane
CC protein {ECO:0000255}. Host mitochondrion membrane
CC {ECO:0000250|UniProtKB:P26664}; Single-pass type I membrane protein
CC {ECO:0000255}. Note=The C-terminal transmembrane domain of the core
CC protein precursor contains an ER signal leading the nascent polyprotein
CC to the ER membrane.
CC -!- SUBCELLULAR LOCATION: [Mature core protein]: Virion
CC {ECO:0000250|UniProtKB:Q99IB8}. Host cytoplasm
CC {ECO:0000250|UniProtKB:Q99IB8}. Host nucleus
CC {ECO:0000250|UniProtKB:P26662}. Host lipid droplet
CC {ECO:0000250|UniProtKB:Q99IB8}. Note=Only a minor proportion of core
CC protein is present in the nucleus (By similarity). Probably present on
CC the surface of lipid droplets (By similarity).
CC {ECO:0000250|UniProtKB:P27958}.
CC -!- SUBCELLULAR LOCATION: [Envelope glycoprotein E1]: Virion membrane
CC {ECO:0000305}; Single-pass type I membrane protein {ECO:0000305}. Host
CC endoplasmic reticulum membrane; Single-pass type I membrane protein
CC {ECO:0000250|UniProtKB:P27958}. Note=The C-terminal transmembrane
CC domain acts as a signal sequence and forms a hairpin structure before
CC cleavage by host signal peptidase (By similarity). After cleavage, the
CC membrane sequence is retained at the C-terminus of the protein, serving
CC as ER membrane anchor (By similarity). A reorientation of the second
CC hydrophobic stretch occurs after cleavage producing a single reoriented
CC transmembrane domain (By similarity). These events explain the final
CC topology of the protein (By similarity).
CC {ECO:0000250|UniProtKB:P27958}.
CC -!- SUBCELLULAR LOCATION: [Envelope glycoprotein E2]: Virion membrane
CC {ECO:0000305}; Single-pass type I membrane protein {ECO:0000305}. Host
CC endoplasmic reticulum membrane; Single-pass type I membrane protein
CC {ECO:0000250|UniProtKB:P27958}. Host lipid droplet
CC {ECO:0000250|UniProtKB:Q9WMX2}. Note=The C-terminal transmembrane
CC domain acts as a signal sequence and forms a hairpin structure before
CC cleavage by host signal peptidase (By similarity). After cleavage, the
CC membrane sequence is retained at the C-terminus of the protein, serving
CC as ER membrane anchor (By similarity). A reorientation of the second
CC hydrophobic stretch occurs after cleavage producing a single reoriented
CC transmembrane domain (By similarity). These events explain the final
CC topology of the protein (By similarity).
CC {ECO:0000250|UniProtKB:P27958}.
CC -!- SUBCELLULAR LOCATION: [Viroporin p7]: Host endoplasmic reticulum
CC membrane {ECO:0000250|UniProtKB:P27958}; Multi-pass membrane protein
CC {ECO:0000250|UniProtKB:P27958}. Host mitochondrion
CC {ECO:0000250|UniProtKB:P27958}. Host cell membrane
CC {ECO:0000250|UniProtKB:P27958}. Note=The C-terminus of p7 membrane
CC domain acts as a signal sequence (By similarity). After cleavage by
CC host signal peptidase, the membrane sequence is retained at the C-
CC terminus of the protein, serving as ER membrane anchor (By similarity).
CC ER retention of p7 is leaky and a small fraction reaches the plasma
CC membrane (By similarity). {ECO:0000250|UniProtKB:P27958}.
CC -!- SUBCELLULAR LOCATION: [Protease NS2]: Host endoplasmic reticulum
CC membrane {ECO:0000250|UniProtKB:P27958}; Multi-pass membrane protein
CC {ECO:0000250|UniProtKB:P27958}. Host lipid droplet
CC {ECO:0000250|UniProtKB:Q9WMX2}. Note=Probably present on the surface of
CC lipid droplets. {ECO:0000250|UniProtKB:Q99IB8}.
CC -!- DOMAIN: [Envelope glycoprotein E1]: The transmembrane regions of
CC envelope E1 and E2 glycoproteins are involved in heterodimer formation,
CC ER localization, and assembly of these proteins.
CC {ECO:0000250|UniProtKB:P27958}.
CC -!- DOMAIN: [Envelope glycoprotein E2]: The transmembrane regions of
CC envelope E1 and E2 glycoproteins are involved in heterodimer formation,
CC ER localization, and assembly of these proteins (By similarity).
CC Envelope E2 glycoprotein contain two highly variable regions called
CC hypervariable region 1 and 2 (HVR1 and HVR2) (By similarity). E2 also
CC contain two segments involved in CD81-binding (By similarity). HVR1 is
CC implicated in the SCARB1-mediated cell entry and probably acts as a
CC regulator of the association of particles with lipids (By similarity).
CC {ECO:0000250|UniProtKB:P26663, ECO:0000250|UniProtKB:P27958}.
CC -!- DOMAIN: [Protease NS2]: The N-terminus of NS3 is required for the
CC catalytic activity of protease NS2 (By similarity). The minimal
CC catalytic region includes the C-terminus of NS2 and the N-terminus NS3
CC protease domain (active region NS2-3) (By similarity).
CC {ECO:0000250|UniProtKB:P26663}.
CC -!- PTM: [Genome polyprotein]: Specific enzymatic cleavages in vivo yield
CC mature proteins (By similarity). The structural proteins, core, E1, E2
CC and p7 are produced by proteolytic processing by host signal peptidases
CC (By similarity). The core protein precursor is synthesized as a 23 kDa,
CC which is retained in the ER membrane through the hydrophobic signal
CC peptide (By similarity). Cleavage by the signal peptidase releases the
CC 21 kDa mature core protein (By similarity). The cleavage of the core
CC protein precursor occurs between aminoacids 176 and 188 but the exact
CC cleavage site is not known (By similarity). Some degraded forms of the
CC core protein appear as well during the course of infection (By
CC similarity). The other proteins (p7, NS2, NS3, NS4A, NS4B, NS5A and
CC NS5B) are cleaved by the viral proteases (By similarity).
CC Autoprocessing between NS2 and NS3 is mediated by the NS2 cysteine
CC protease catalytic domain and regulated by the NS3 N-terminal domain
CC (By similarity). {ECO:0000250|UniProtKB:P26664,
CC ECO:0000250|UniProtKB:P27958}.
CC -!- PTM: [Mature core protein]: Phosphorylated by host PKC and PKA.
CC {ECO:0000250|UniProtKB:Q01403}.
CC -!- PTM: [Mature core protein]: Ubiquitinated; mediated by UBE3A and
CC leading to core protein subsequent proteasomal degradation.
CC {ECO:0000250|UniProtKB:Q03463}.
CC -!- PTM: [Envelope glycoprotein E1]: Highly N-glycosylated.
CC {ECO:0000250|UniProtKB:P27958}.
CC -!- PTM: [Envelope glycoprotein E2]: Highly N-glycosylated.
CC {ECO:0000250|UniProtKB:P27958}.
CC -!- PTM: [Protease NS2]: Palmitoylation is required for NS2/3
CC autoprocessing and E2 recruitment to membranes.
CC {ECO:0000250|UniProtKB:P27958}.
CC -!- MISCELLANEOUS: Viral particle assembly takes place at the surface of
CC ER-derived membranes in close proximity to lipid droplets. NS2
CC associates with E1/E2 glycoproteins, NS3 and NS5A, which interacts with
CC the viral RNA and core protein to promote genome encapsidation. The
CC nucleocapsid buds at the ER membrane where E1/E2 glycoproteins are
CC anchored and afterward associate with nascent lipid droplet to acquire
CC APOE and APOC. Secretion of viral particles is probably regulated by
CC viroporin p7. {ECO:0000305}.
CC -!- MISCELLANEOUS: [Mature core protein]: Exerts viral interference on
CC hepatitis B virus when HCV and HBV coinfect the same cell, by
CC suppressing HBV gene expression, RNA encapsidation and budding.
CC {ECO:0000250|UniProtKB:P26662}.
CC -!- SIMILARITY: Belongs to the hepacivirus polyprotein family.
CC {ECO:0000305}.
CC -!- CAUTION: The core gene probably also codes for alternative reading
CC frame proteins (ARFPs). Many functions depicted for the core protein
CC might belong to the ARFPs. {ECO:0000305}.
CC -!- WEB RESOURCE: Name=Virus Pathogen Resource;
CC URL="https://www.viprbrc.org/brc/home.spg?decorator=flavi_hcv";
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DR EMBL; AY885238; AAW78019.1; -; Genomic_RNA.
DR PDB; 4GAG; X-ray; 1.80 A; P=412-423.
DR PDB; 5VXR; X-ray; 1.40 A; P=412-423.
DR PDBsum; 4GAG; -.
DR PDBsum; 5VXR; -.
DR SMR; Q5EG65; -.
DR IntAct; Q5EG65; 1.
DR ABCD; Q5EG65; 1 sequenced antibody.
DR euHCVdb; AY885238; -.
DR GO; GO:0044167; C:host cell endoplasmic reticulum membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0044186; C:host cell lipid droplet; IEA:UniProtKB-SubCell.
DR GO; GO:0044191; C:host cell mitochondrial membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0042025; C:host cell nucleus; IEA:UniProtKB-SubCell.
DR GO; GO:0020002; C:host cell plasma membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0044385; C:integral to membrane of host cell; IEA:UniProtKB-KW.
DR GO; GO:0019031; C:viral envelope; IEA:UniProtKB-KW.
DR GO; GO:0019013; C:viral nucleocapsid; IEA:UniProtKB-KW.
DR GO; GO:0055036; C:virion membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0008234; F:cysteine-type peptidase activity; IEA:UniProtKB-KW.
DR GO; GO:0005216; F:ion channel activity; IEA:UniProtKB-KW.
DR GO; GO:0003723; F:RNA binding; IEA:UniProtKB-KW.
DR GO; GO:0005198; F:structural molecule activity; IEA:InterPro.
DR GO; GO:0075512; P:clathrin-dependent endocytosis of virus by host cell; IEA:UniProtKB-KW.
DR GO; GO:0039654; P:fusion of virus membrane with host endosome membrane; IEA:UniProtKB-KW.
DR GO; GO:0039707; P:pore formation by virus in membrane of host cell; IEA:UniProtKB-KW.
DR GO; GO:0051259; P:protein complex oligomerization; IEA:UniProtKB-KW.
DR GO; GO:0006508; P:proteolysis; IEA:UniProtKB-KW.
DR GO; GO:0019062; P:virion attachment to host cell; IEA:UniProtKB-KW.
DR Gene3D; 4.10.710.10; -; 1.
DR InterPro; IPR002521; HCV_Core_C.
DR InterPro; IPR044896; HCV_core_chain_A.
DR InterPro; IPR002522; HCV_core_N.
DR InterPro; IPR002519; HCV_Env.
DR InterPro; IPR002531; HCV_NS1.
DR Pfam; PF01543; HCV_capsid; 1.
DR Pfam; PF01542; HCV_core; 1.
DR Pfam; PF01539; HCV_env; 1.
DR Pfam; PF01560; HCV_NS1; 1.
PE 1: Evidence at protein level;
KW 3D-structure; Acetylation; Apoptosis; Capsid protein;
KW Clathrin-mediated endocytosis of virus by host; Disulfide bond;
KW Fusion of virus membrane with host endosomal membrane;
KW Fusion of virus membrane with host membrane; Glycoprotein;
KW Host cell membrane; Host cytoplasm; Host endoplasmic reticulum;
KW Host lipid droplet; Host membrane; Host mitochondrion; Host nucleus;
KW Host-virus interaction; Hydrolase; Interferon antiviral system evasion;
KW Ion channel; Ion transport; Isopeptide bond; Magnesium; Membrane; Oncogene;
KW Phosphoprotein; Protease; Ribonucleoprotein; RNA-binding; Thiol protease;
KW Transmembrane; Transmembrane helix; Transport; Ubl conjugation;
KW Viral attachment to host cell; Viral envelope protein; Viral ion channel;
KW Viral nucleoprotein; Viral penetration into host cytoplasm; Virion;
KW Virus endocytosis by host; Virus entry into host cell; Zinc.
FT INIT_MET 1
FT /note="Removed; by host"
FT /evidence="ECO:0000250|UniProtKB:P26664"
FT CHAIN 2..>829
FT /note="Genome polyprotein"
FT /id="PRO_0000450903"
FT CHAIN 2..191
FT /note="Core protein precursor"
FT /id="PRO_0000037559"
FT CHAIN 2..177
FT /note="Mature core protein"
FT /id="PRO_0000037560"
FT PROPEP 178..191
FT /note="ER anchor for the core protein, removed in mature
FT form by host signal peptidase"
FT /id="PRO_0000037561"
FT CHAIN 192..383
FT /note="Envelope glycoprotein E1"
FT /id="PRO_0000037562"
FT CHAIN 384..746
FT /note="Envelope glycoprotein E2"
FT /id="PRO_0000037563"
FT CHAIN 747..809
FT /note="Viroporin p7"
FT /id="PRO_0000037564"
FT CHAIN 810..>829
FT /note="Protease NS2"
FT /id="PRO_0000037565"
FT TOPO_DOM 2..168
FT /note="Cytoplasmic"
FT /evidence="ECO:0000255"
FT TRANSMEM 169..189
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TOPO_DOM 190..358
FT /note="Lumenal"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT TRANSMEM 359..379
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT TOPO_DOM 380..725
FT /note="Lumenal"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT TRANSMEM 726..746
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT TOPO_DOM 747..757
FT /note="Lumenal"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT TRANSMEM 758..778
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT TOPO_DOM 779..781
FT /note="Cytoplasmic"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT TRANSMEM 782..803
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT TOPO_DOM 804..813
FT /note="Lumenal"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT TRANSMEM 814..>829
FT /note="Helical"
FT /evidence="ECO:0000250|UniProtKB:Q9WMX2"
FT REGION 2..75
FT /note="Disordered"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT REGION 2..59
FT /note="Interaction with DDX3X"
FT /evidence="ECO:0000269|PubMed:10329544"
FT REGION 2..58
FT /note="Interaction with EIF2AK2/PKR"
FT /evidence="ECO:0000250|UniProtKB:P26662"
FT REGION 2..23
FT /note="Interaction with STAT1"
FT /evidence="ECO:0000250|UniProtKB:P26662"
FT REGION 112..152
FT /note="Important for endoplasmic reticulum and
FT mitochondrial localization"
FT /evidence="ECO:0000250|UniProtKB:P26662"
FT REGION 122..173
FT /note="Interaction with APOA2"
FT /evidence="ECO:0000250|UniProtKB:P29846"
FT REGION 164..167
FT /note="Important for lipid droplets localization"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT REGION 265..296
FT /note="Important for fusion"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT REGION 385..411
FT /note="HVR1"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT REGION 474..479
FT /note="HVR2"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT REGION 480..493
FT /note="CD81-binding 1"
FT /evidence="ECO:0000250|UniProtKB:P26663"
FT REGION 544..551
FT /note="CD81-binding 2"
FT /evidence="ECO:0000250|UniProtKB:P26663"
FT REGION 660..671
FT /note="PKR/eIF2-alpha phosphorylation homology domain
FT (PePHD)"
FT /evidence="ECO:0000250"
FT MOTIF 5..13
FT /note="Nuclear localization signal"
FT /evidence="ECO:0000250|UniProtKB:Q99IB8"
FT MOTIF 38..43
FT /note="Nuclear localization signal"
FT /evidence="ECO:0000250|UniProtKB:Q99IB8"
FT MOTIF 58..64
FT /note="Nuclear localization signal"
FT /evidence="ECO:0000250|UniProtKB:Q99IB8"
FT MOTIF 66..71
FT /note="Nuclear localization signal"
FT /evidence="ECO:0000250|UniProtKB:Q99IB8"
FT COMPBIAS 47..61
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT SITE 177..178
FT /note="Cleavage; by host signal peptide peptidase"
FT /evidence="ECO:0000250|UniProtKB:P26662"
FT SITE 191..192
FT /note="Cleavage; by host signal peptidase"
FT /evidence="ECO:0000250|UniProtKB:P26662"
FT SITE 383..384
FT /note="Cleavage; by host signal peptidase"
FT /evidence="ECO:0000250|UniProtKB:P26662"
FT SITE 746..747
FT /note="Cleavage; by host signal peptidase"
FT /evidence="ECO:0000250"
FT SITE 809..810
FT /note="Cleavage; by host signal peptidase"
FT /evidence="ECO:0000250"
FT MOD_RES 2
FT /note="N-acetylserine; by host"
FT /evidence="ECO:0000250|UniProtKB:Q913V3"
FT MOD_RES 53
FT /note="Phosphoserine; by host"
FT /evidence="ECO:0000250|UniProtKB:Q01403"
FT MOD_RES 99
FT /note="Phosphoserine; by host"
FT /evidence="ECO:0000250|UniProtKB:Q01403"
FT MOD_RES 116
FT /note="Phosphoserine; by host PKA"
FT /evidence="ECO:0000250|UniProtKB:Q01403"
FT CARBOHYD 196
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT CARBOHYD 209
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT CARBOHYD 234
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT CARBOHYD 305
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255"
FT CARBOHYD 417
FT /note="N-linked (GlcNAc...) (high mannose) asparagine; by
FT host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT CARBOHYD 423
FT /note="N-linked (GlcNAc...) (high mannose) asparagine; by
FT host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT CARBOHYD 430
FT /note="N-linked (GlcNAc...) (high mannose) asparagine; by
FT host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT CARBOHYD 448
FT /note="N-linked (GlcNAc...) (high mannose) asparagine; by
FT host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT CARBOHYD 540
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255"
FT CARBOHYD 556
FT /note="N-linked (GlcNAc...) (high mannose) asparagine; by
FT host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT CARBOHYD 576
FT /note="N-linked (GlcNAc...) (high mannose) asparagine; by
FT host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT CARBOHYD 623
FT /note="N-linked (GlcNAc...) (high mannose) asparagine; by
FT host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT CARBOHYD 645
FT /note="N-linked (GlcNAc...) (high mannose) asparagine; by
FT host"
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT DISULFID 429..552
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT DISULFID 452..459
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT DISULFID 486..494
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT DISULFID 503..508
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT DISULFID 564..569
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT DISULFID 581..585
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT DISULFID 597..620
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT DISULFID 607..644
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT DISULFID 652..677
FT /evidence="ECO:0000250|UniProtKB:P27958"
FT MUTAGEN 180..184
FT /note="ALLSC->VLLLV: Complete loss of processing."
FT /evidence="ECO:0000269|PubMed:12145199"
FT NON_TER 829
FT STRAND 414..416
FT /evidence="ECO:0007829|PDB:5VXR"
FT STRAND 419..421
FT /evidence="ECO:0007829|PDB:5VXR"
SQ SEQUENCE 829 AA; 90587 MW; 17AD3868F50B4AD4 CRC64;
MSTNPKPQRK TKRNTNRRPQ DVKFPGGGQI VGGVYLLPRR GPRLGVRATR KTSERSQPRG
RRQPIPKARR PKGRNWAQPG YPWPLYGNEG CGWAGWLPSP RGSRPSWGPN DPRRRSRNLG
KVIDTLTCGF VDLMGYIPLV GAPLRGAARA LAHGVRVLED GVNYATGNLP GCSFSIFLLA
LLSCLTVPAS AYQVRNSTGL YHVTNDCPNS SIVYEAVDAI LHTPGCVPCV REGNASRCWV
AMTPTVATRD GRLPTTQLRR HIDLLVGSAT LCSALYVGDL CGSVFLVGQL FTFSPRRHWT
TQGCNCSIYP GHITGHRMAW DMMMNWSPTT ALVVAQLLRI PQAILDMIAG AHWGVLAGMA
YFSMVGNWAK VLAVLLLFAG VDAETHVTGG AAARSTLQLA GLFQPGAKQN VQLINTNGSW
HVNRTALNCN DSLNTGWIAG LFYYHGFNSS GCSERLASCR SLTDFDQGWG PISYAGGGGP
DHRPYCWHYP PKPCGIVPAK SVCGPVYCFT PSPVVVGTTD RSGAPTYSWG ADDTDVFVLN
NTRPPLGNWF GCTWMNSTGF TKVCGAPPCV IGGVGNNTLH CPTDCFRKHP EATYSRCGSG
PWLTPRCLVD YPYRLWHYPC TINHSIFKVR MYVGGVEHRL DAACNWTRGE RCDLEDRDRS
ELSPLLLSTT QWQVLPCSFT TLPALSTGLI HLHQNIVDVQ YLYGVGSSIA SWAIKWEYVV
LLFLLLADAR VCSCLWMMLL ISQAEAALEN LVVLNAASLA GTHGLVSFLV FFCFAWFLRG
KWVPGAVYAL YGMWPLLLLL LALPQRAYAL DTEVAASCGG VVLVGLMAL
