DPOL_HBVE2
ID DPOL_HBVE2 Reviewed; 842 AA.
AC Q80IU7;
DT 18-MAR-2008, integrated into UniProtKB/Swiss-Prot.
DT 01-JUN-2003, sequence version 1.
DT 03-AUG-2022, entry version 77.
DE RecName: Full=Protein P {ECO:0000255|HAMAP-Rule:MF_04073};
DE Includes:
DE RecName: Full=DNA-directed DNA polymerase {ECO:0000255|HAMAP-Rule:MF_04073};
DE EC=2.7.7.7 {ECO:0000255|HAMAP-Rule:MF_04073};
DE Includes:
DE RecName: Full=RNA-directed DNA polymerase {ECO:0000255|HAMAP-Rule:MF_04073};
DE EC=2.7.7.49 {ECO:0000255|HAMAP-Rule:MF_04073};
DE Includes:
DE RecName: Full=Ribonuclease H {ECO:0000255|HAMAP-Rule:MF_04073};
DE EC=3.1.26.4 {ECO:0000255|HAMAP-Rule:MF_04073};
GN Name=P {ECO:0000255|HAMAP-Rule:MF_04073};
OS Hepatitis B virus genotype E (isolate Cote d'Ivoire/ABI-129/2003) (HBV-E).
OC Viruses; Riboviria; Pararnavirae; Artverviricota; Revtraviricetes;
OC Blubervirales; Hepadnaviridae; Orthohepadnavirus;
OC hepatitis B virus genotype E.
OX NCBI_TaxID=489496;
OH NCBI_TaxID=9606; Homo sapiens (Human).
OH NCBI_TaxID=9598; Pan troglodytes (Chimpanzee).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA Suzuki S., Sugauchi F., Orito E., Kato H., Usuda S., Siransy L., Arita I.,
RA Sakamoto Y., Yoshihara N., El-Gohary A., Ueda R., Mizokami M.;
RT "Distribution of Hepatitis B Virus (HBV) genotypes among HBV carriers in
RT Cote d'Ivoire: complete genome sequence and phylogenetic relatedness of HBV
RT genotype E.";
RL Submitted (SEP-2002) to the EMBL/GenBank/DDBJ databases.
RN [2]
RP REVIEW.
RX PubMed=17206754; DOI=10.3748/wjg.v13.i1.48;
RA Beck J., Nassal M.;
RT "Hepatitis B virus replication.";
RL World J. Gastroenterol. 13:48-64(2007).
CC -!- FUNCTION: Multifunctional enzyme that converts the viral RNA genome
CC into dsDNA in viral cytoplasmic capsids. This enzyme displays a DNA
CC polymerase activity that can copy either DNA or RNA templates, and a
CC ribonuclease H (RNase H) activity that cleaves the RNA strand of RNA-
CC DNA heteroduplexes in a partially processive 3'- to 5'-endonucleasic
CC mode. Neo-synthesized pregenomic RNA (pgRNA) are encapsidated together
CC with the P protein, and reverse-transcribed inside the nucleocapsid.
CC Initiation of reverse-transcription occurs first by binding the epsilon
CC loop on the pgRNA genome, and is initiated by protein priming, thereby
CC the 5'-end of (-)DNA is covalently linked to P protein. Partial (+)DNA
CC is synthesized from the (-)DNA template and generates the relaxed
CC circular DNA (RC-DNA) genome. After budding and infection, the RC-DNA
CC migrates in the nucleus, and is converted into a plasmid-like
CC covalently closed circular DNA (cccDNA). The activity of P protein does
CC not seem to be necessary for cccDNA generation, and is presumably
CC released from (+)DNA by host nuclear DNA repair machinery.
CC {ECO:0000255|HAMAP-Rule:MF_04073}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) =
CC diphosphate + DNA(n+1); Xref=Rhea:RHEA:22508, Rhea:RHEA-COMP:17339,
CC Rhea:RHEA-COMP:17340, ChEBI:CHEBI:33019, ChEBI:CHEBI:61560,
CC ChEBI:CHEBI:173112; EC=2.7.7.7; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_04073};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) =
CC diphosphate + DNA(n+1); Xref=Rhea:RHEA:22508, Rhea:RHEA-COMP:17339,
CC Rhea:RHEA-COMP:17340, ChEBI:CHEBI:33019, ChEBI:CHEBI:61560,
CC ChEBI:CHEBI:173112; EC=2.7.7.49; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_04073};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=Endonucleolytic cleavage to 5'-phosphomonoester.; EC=3.1.26.4;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_04073};
CC -!- ACTIVITY REGULATION: Activated by host HSP70 and HSP40 in vitro to be
CC able to bind the epsilon loop of the pgRNA. Because deletion of the
CC RNase H region renders the protein partly chaperone-independent, the
CC chaperones may be needed indirectly to relieve occlusion of the RNA-
CC binding site by this domain. Inhibited by several reverse-transcriptase
CC inhibitors: Lamivudine, Adefovir and Entecavir. {ECO:0000255|HAMAP-
CC Rule:MF_04073}.
CC -!- DOMAIN: Terminal protein domain (TP) is hepadnavirus-specific. Spacer
CC domain is highly variable and separates the TP and RT domains.
CC Polymerase/reverse-transcriptase domain (RT) and ribonuclease H domain
CC (RH) are similar to retrovirus reverse transcriptase/RNase H.
CC {ECO:0000255|HAMAP-Rule:MF_04073}.
CC -!- DOMAIN: The polymerase/reverse transcriptase (RT) and ribonuclease H
CC (RH) domains are structured in five subdomains: finger, palm, thumb,
CC connection and RNase H. Within the palm subdomain, the 'primer grip'
CC region is thought to be involved in the positioning of the primer
CC terminus for accommodating the incoming nucleotide. The RH domain
CC stabilizes the association of RT with primer-template.
CC {ECO:0000255|HAMAP-Rule:MF_04073}.
CC -!- MISCELLANEOUS: Hepadnaviral virions contain probably just one P protein
CC molecule per particle. {ECO:0000255|HAMAP-Rule:MF_04073}.
CC -!- SIMILARITY: Belongs to the hepadnaviridae P protein family.
CC {ECO:0000255|HAMAP-Rule:MF_04073}.
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DR EMBL; AB091255; BAC65104.1; -; Genomic_DNA.
DR PRIDE; Q80IU7; -.
DR Proteomes; UP000001387; Genome.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0003887; F:DNA-directed DNA polymerase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0003964; F:RNA-directed DNA polymerase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0004523; F:RNA-DNA hybrid ribonuclease activity; IEA:UniProtKB-UniRule.
DR GO; GO:0006260; P:DNA replication; IEA:UniProtKB-UniRule.
DR GO; GO:0039503; P:suppression by virus of host innate immune response; IEA:UniProtKB-UniRule.
DR Gene3D; 3.30.70.270; -; 1.
DR HAMAP; MF_04073; HBV_DPOL; 1.
DR InterPro; IPR043502; DNA/RNA_pol_sf.
DR InterPro; IPR001462; DNApol_viral_C.
DR InterPro; IPR000201; DNApol_viral_N.
DR InterPro; IPR037531; HBV_DPOL.
DR InterPro; IPR043128; Rev_trsase/Diguanyl_cyclase.
DR InterPro; IPR000477; RT_dom.
DR Pfam; PF00336; DNA_pol_viral_C; 1.
DR Pfam; PF00242; DNA_pol_viral_N; 1.
DR Pfam; PF00078; RVT_1; 1.
DR SUPFAM; SSF56672; SSF56672; 1.
DR PROSITE; PS50878; RT_POL; 1.
PE 3: Inferred from homology;
KW DNA replication; DNA-binding; DNA-directed DNA polymerase; Endonuclease;
KW Host-virus interaction; Hydrolase;
KW Inhibition of host innate immune response by virus;
KW Inhibition of host RLR pathway by virus; Magnesium; Metal-binding;
KW Multifunctional enzyme; Nuclease; Nucleotidyltransferase;
KW RNA-directed DNA polymerase; Transferase; Viral immunoevasion.
FT CHAIN 1..842
FT /note="Protein P"
FT /id="PRO_0000323271"
FT DOMAIN 356..599
FT /note="Reverse transcriptase"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT REGION 1..177
FT /note="Terminal protein domain (TP)"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT REGION 178..345
FT /note="Spacer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT REGION 186..273
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 346..689
FT /note="Polymerase/reverse transcriptase domain (RT)"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT COMPBIAS 194..243
FT /note="Polar residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 428
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT BINDING 550
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT BINDING 551
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT SITE 63
FT /note="Priming of reverse-transcription by covalently
FT linking the first nucleotide of the (-)DNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
SQ SEQUENCE 842 AA; 94627 MW; D716A92E6B5B4868 CRC64;
MPLSYQHFRR ILLLDEEAGP LEEELPRLAD EDLNRRVAED LNLQLPNVSI PWTHKVGNFT
GLYSSTIPVF NPNWKTPSFP DIHLHQDIIN KCEQFVGPLT VNEKRRLNLV MPARFFPIAT
KYLPLEKGIK PYYPDNVVNH YFQTRHYLHT LWKAGILYKR ETTRSASFCG SPYSWEQELH
HGAFLDGPSR MGEESFHHQS SGIFSRPPVG SSIQSKHQKS RLGPQSQQRP LDGSQQGRSG
SIRAGVHSPT RRPFGVEPSG SRHAKNIASR SASCLHQSAV RKAAYPNHST FERHSSSGHA
VEFHNIPPSS AGSQSKRPVF SCWWLQFRNS EPCSDYCLTH LVNLLEDWGP CTEHGRHHIR
IPRTPARVTG GVFLVDKNPH NTAESRLVVD FSQFSRGSSR VSWPKFAVPN LQSLTNLLSS
NLSWLSLDVS AAFYHIPLHP AAMPHLLVGS SGLSRYVARL SSNSRIINHQ YGTLPNLHDS
CSRNLYVSLM LLFKTFGRKL HLYSHPIIMG FRKIPMGVGL SPFLLAQFTS AICSVVRRAF
PHCLAFSYMD DVVLGAKSVQ HLESLYTSVT NFLLSLGIHL NPNKTKRWGY SLNFMGYVIG
SWGSLPQEHI RMKIKDCFRK LPVNRPIDWK VCQRIVGLLG FAAPFTQCGY PALMPLYACI
QSKQAFTFSP TYKAFLCKQY LNLYPVARQR SGLCQVFADA TPTGWGLAIG HQRMRGTFVA
PLPIHTAELL AACFARSRSG AKLIGTDNSV VLSRKYTSFP WLLGCAANWI LRGTSFVYVP
SALNPADDPS RGRLGIYRPL LRLPFQPTTG RTSLYAVSPS VPSRLPDRVH FASPLHVAWR
PP
