DPOL_HBVD3
ID DPOL_HBVD3 Reviewed; 832 AA.
AC P03156; P04484;
DT 21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT 21-JUL-1986, sequence version 1.
DT 03-AUG-2022, entry version 111.
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 D subtype ayw (isolate France/Tiollais/1979)
OS (HBV-D).
OC Viruses; Riboviria; Pararnavirae; Artverviricota; Revtraviricetes;
OC Blubervirales; Hepadnaviridae; Orthohepadnavirus;
OC hepatitis B virus genotype D.
OX NCBI_TaxID=490133;
OH NCBI_TaxID=9606; Homo sapiens (Human).
OH NCBI_TaxID=9598; Pan troglodytes (Chimpanzee).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=399327; DOI=10.1038/281646a0;
RA Galibert F., Mandart E., Fitoussi F., Tiollais P., Charnay P.;
RT "Nucleotide sequence of the hepatitis B virus genome (subtype ayw) cloned
RT in E. coli.";
RL Nature 281:646-650(1979).
RN [2]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=Latvia;
RX PubMed=3996597; DOI=10.1016/0014-5793(85)80771-7;
RA Bichko V., Pushko P., Dreilina D., Pumpen P., Gren E.Y.;
RT "Subtype ayw variant of hepatitis B virus. DNA primary structure
RT analysis.";
RL FEBS Lett. 185:208-212(1985).
RN [3]
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; V01460; -; NOT_ANNOTATED_CDS; Genomic_DNA.
DR EMBL; X02496; CAB41700.1; -; Genomic_DNA.
DR PIR; A00702; JDVLVA.
DR PIR; A00703; JDVLVB.
DR Proteomes; UP000007930; 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 Reference proteome; RNA-directed DNA polymerase; Transferase;
KW Viral immunoevasion.
FT CHAIN 1..832
FT /note="Protein P"
FT /id="PRO_0000222344"
FT DOMAIN 346..589
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..335
FT /note="Spacer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT REGION 186..225
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 336..679
FT /note="Polymerase/reverse transcriptase domain (RT)"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT BINDING 418
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT BINDING 540
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT BINDING 541
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"
FT VARIANT 118
FT /note="K -> N (in strain: Latvia)"
FT VARIANT 136
FT /note="H -> Y (in strain: Latvia)"
FT VARIANT 178
FT /note="D -> E (in strain: Latvia)"
FT VARIANT 236
FT /note="F -> I (in strain: Latvia)"
FT VARIANT 240
FT /note="A -> T (in strain: Latvia)"
FT VARIANT 255..257
FT /note="TNF -> RNV (in strain: Latvia)"
FT VARIANT 266
FT /note="H -> Y (in strain: Latvia)"
FT VARIANT 293
FT /note="F -> L (in strain: Latvia)"
FT VARIANT 330
FT /note="L -> H (in strain: Latvia)"
FT VARIANT 356
FT /note="S -> A (in strain: Latvia)"
FT VARIANT 457..459
FT /note="LNN -> FNY (in strain: Latvia)"
FT VARIANT 465..466
FT /note="PD -> QN (in strain: Latvia)"
FT VARIANT 470
FT /note="Y -> S (in strain: Latvia)"
FT VARIANT 583
FT /note="N -> H (in strain: Latvia)"
FT VARIANT 598
FT /note="E -> D (in strain: Latvia)"
FT VARIANT 613
FT /note="I -> V (in strain: Latvia)"
FT VARIANT 709..711
FT /note="SAP -> LAR (in strain: Latvia)"
FT VARIANT 734
FT /note="I -> L (in strain: Latvia)"
FT VARIANT 749
FT /note="F -> Y (in strain: Latvia)"
SQ SEQUENCE 832 AA; 93677 MW; 7AB3AAE58A57D0D6 CRC64;
MPLSYQHFRR LLLLDDEAGP LEEELPRLAD EGLNRRVAED LNLGNLNVSI PWTHKVGNFT
GLYSSTVPVF NPHWKTPSFP NIHLHQDIIK KCEQFVGPLT VNEKRRLQLI MPARFYPKVT
KYLPLDKGIK PYYPEHLVNH YFQTRHYLHT LWKAGILYKR ETTHSASFCG SPYSWEQDLQ
HGAESFHQQS SGILSRPPVG SSLQSKHRKS RLGLQSQQGH LARRQQGRSW SIRAGFHPTA
RRPFGVEPSG SGHTTNFASK SASCLHQSPV RKAAYPAVST FEKHSSSGHA VEFHNLPPNS
ARSQSERPVF PCWWLQFRNS KPCSDYCLSL IVNLLEDWGP CAEHGEHHIR IPRTPSRVTG
GVFLVDKNPH NTAESRLVVD FSQFSRGNYR VSWPKFAVPN LQSLTNLLSS NLSWLSLDVS
AAFYHLPLHP AAMPHLLVGS SGLSRYVARL SSNSRILNNQ HGTMPDLHDY CSRNLYVSLL
LLYQTFGRKL HLYSHPIILG FRKIPMGVGL SPFLLAQFTS AICSVVRRAF PHCLAFSYMD
DVVLGAKSVQ HLESLFTAVT NFLLSLGIHL NPNKTKRWGY SLNFMGYVIG CYGSLPQEHI
IQKIKECFRK LPINRPIDWK VCQRIVGLLG FAAPFTQCGY PALMPLYACI QSKQAFTFSP
TYKAFLCKQY LNLYPVARQR PGLCQVFADA TPTGWGLVMG HQRMRGTFSA PLPIHTAELL
AACFARSRSG ANIIGTDNSV VLSRKYTSFP WLLGCAANWI LRGTSFVYVP SALNPADDPS
RGRLGLSRPL LRLPFRPTTG RTSLYADSPS VPSHLPDRVH FASPLHVAWR PP
