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DPOL_WMHBV
ID   DPOL_WMHBV              Reviewed;         835 AA.
AC   O71304;
DT   18-MAR-2008, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1998, sequence version 1.
DT   03-AUG-2022, entry version 81.
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   Woolly monkey hepatitis B virus (isolate Louisville) (WMHBV).
OC   Viruses; Riboviria; Pararnavirae; Artverviricota; Revtraviricetes;
OC   Blubervirales; Hepadnaviridae; Orthohepadnavirus.
OX   NCBI_TaxID=490134;
OH   NCBI_TaxID=9519; Lagothrix lagotricha (Brown woolly monkey) (Humboldt's woolly monkey).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=9576957; DOI=10.1073/pnas.95.10.5757;
RA   Lanford R.E., Chavez D., Brasky K.M., Burns R.B. III, Rico-Hesse R.;
RT   "Isolation of a hepadnavirus from the woolly monkey, a New World primate.";
RL   Proc. Natl. Acad. Sci. U.S.A. 95:5757-5761(1998).
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; AF046996; AAC16908.1; -; Genomic_DNA.
DR   PRIDE; O71304; -.
DR   Proteomes; UP000008599; 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..835
FT                   /note="Protein P"
FT                   /id="PRO_0000323286"
FT   DOMAIN          345..590
FT                   /note="Reverse transcriptase"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT   REGION          1..176
FT                   /note="Terminal protein domain (TP)"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT   REGION          177..334
FT                   /note="Spacer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT   REGION          211..235
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          258..288
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          335..680
FT                   /note="Polymerase/reverse transcriptase domain (RT)"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT   COMPBIAS        258..283
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         417
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   BINDING         542
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_04073"
FT   SITE            62
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   835 AA;  93843 MW;  88623B654D96107F CRC64;
     MPLSYQHFRK LLLLDEGDPL EDALPRLADE DLNRRVAEGL NLQHLPVSIP WTHKVGPFSG
     LYSVSTLTFN PQWKTPQFPL IHLKEDLIPF IESYFGPLTS NEKRRLKLVL PARFYPKATK
     YFPLEKGIKP HYPNDVVNHY YQVQHYLHTL WEAGVLYKRE TTHSASFFGT PYTWEHKLQH
     GTQPVNVQPA GILSQSSAGP PVQGQCRLSR LGQKSKQGPL ATSPRHGSGG LWSRTSATPW
     RPSGVEFTSS GFVCHSARHP SSSINQSRQR KETNTSYSSS ERHSPTSHDL EHVLLPELSS
     ESKGQRPLLS CWWLNFKHCQ PCSDHCLHHI VKLLDDWGPC QHHGHHFIRI PRTPSRITGG
     VFLVDKNPHN ATESRLVVDF SQFSRGNTSV SWPKFAVPNL QSLTNLLSTD LSWVSLDVFA
     AFYHLPLHPA SMPHLLVGSS GLPRYVARVS SSTNSYRNNN NNGTLQDLHA NCSRHLFVSL
     MLLYQTYGRK LHLYSHPLIM GFRKVPMGLG LSPFLLAQFT SAICSVVRRA FPHCMAFSYM
     DDVVLGAKSV QHLESLLASV TTFLLALGIH LNPEKTKRWG KALNFMGYVI GGYGSLPQQH
     IRDKIALCFQ KLPCNRPIDW KVCQRIVGLL GFVAPFTQCG YAALMPIYTC IQKHQAFTFS
     LVYKTFLKDQ YMHLYPVARQ RAGHCQVFAD ATPTGWGLVM GNQRMRGTFL SPLPIHTAEL
     LAACFARCWS GAKLIGTDNA VVLSRKYTHF PWLLGCAATW ILRGTCFVYV PSKLNPADDP
     SRGCLGLLKP LPRLLFQPST GRTSLYAVSP PVPFHRPGRV LFASPLQPGD AWRPP
 
 
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