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UniProtKB - A0A3G3C4E2 (A0A3G3C4E2_HBV)

Entry version 10 (10 Feb 2021)
Sequence version 1 (13 Feb 2019)
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Protein

Protein P

Gene

P

Organism
Hepatitis B virus (HBV)
Status
Unreviewed-Annotation score:

Annotation score:4 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>-Protein inferred from homologyi <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Multifunctional enzyme that converts the viral RNA genome into dsDNA in viral cytoplasmic capsids. This enzyme displays a DNA polymerase activity that can copy either DNA or RNA templates, and a ribonuclease H (RNase H) activity that cleaves the RNA strand of RNA-DNA heteroduplexes in a partially processive 3'- to 5'-endonucleasic mode. Neo-synthesized pregenomic RNA (pgRNA) are encapsidated together with the P protein, and reverse-transcribed inside the nucleocapsid. Initiation of reverse-transcription occurs first by binding the epsilon loop on the pgRNA genome, and is initiated by protein priming, thereby the 5'-end of (-)DNA is covalently linked to P protein. Partial (+)DNA is synthesized from the (-)DNA template and generates the relaxed circular DNA (RC-DNA) genome. After budding and infection, the RC-DNA migrates in the nucleus, and is converted into a plasmid-like covalently closed circular DNA (cccDNA). The activity of P protein does not seem to be necessary for cccDNA generation, and is presumably released from (+)DNA by host nuclear DNA repair machinery.UniRule annotation

Miscellaneous

Hepadnaviral virions contain probably just one P protein molecule per particle.UniRule annotation

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes regulatory mechanisms for enzymes, transporters or microbial transcription factors, and reports the components which regulate (by activation or inhibition) the reaction.<p><a href='/help/activity_regulation' target='_top'>More...</a></p>Activity regulationi

Activated by host HSP70 and HSP40 in vitro to be able to bind the epsilon loop of the pgRNA. Because deletion of the RNase H region renders the protein partly chaperone-independent, the chaperones may be needed indirectly to relieve occlusion of the RNA-binding site by this domain. Inhibited by several reverse-transcriptase inhibitors: Lamivudine, Adefovir and Entecavir.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection describes interesting single amino acid sites on the sequence that are not defined in any other subsection. This subsection can be displayed in different sections ('Function', 'PTM / Processing', 'Pathology and Biotech') according to its content.<p><a href='/help/site' target='_top'>More...</a></p>Sitei63Priming of reverse-transcription by covalently linking the first nucleotide of the (-)DNAUniRule annotation1
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section indicates at which position the protein binds a given metal ion. The nature of the metal is indicated in the 'Description' field.<p><a href='/help/metal' target='_top'>More...</a></p>Metal bindingi429Magnesium; catalyticUniRule annotation1
Metal bindingi551Magnesium; catalyticUniRule annotation1
Metal bindingi552Magnesium; catalyticUniRule annotation1

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

Complete GO annotation on QuickGO ...

GO - Biological processi

Complete GO annotation on QuickGO ...

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionDNA-bindingUniRule annotation, DNA-directed DNA polymeraseUniRule annotationARBA annotation, EndonucleaseUniRule annotationARBA annotation, Hydrolase, Multifunctional enzymeUniRule annotation, Nuclease, Nucleotidyltransferase, RNA-directed DNA polymeraseUniRule annotationARBA annotation, Transferase
Biological processDNA replicationUniRule annotationARBA annotation, Host-virus interaction, Inhibition of host innate immune response by virus, Inhibition of host RLR pathway by virusUniRule annotationARBA annotation, Viral immunoevasion
LigandMagnesiumUniRule annotationARBA annotation, Metal-bindingUniRule annotationARBA annotation

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Protein PUniRule annotation
Including the following 3 domains:
DNA-directed DNA polymeraseUniRule annotation (EC:2.7.7.7UniRule annotation)
RNA-directed DNA polymeraseUniRule annotation (EC:2.7.7.49UniRule annotation)
Ribonuclease HUniRule annotation (EC:3.1.26.4UniRule annotation)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:PUniRule annotation
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiHepatitis B virus (HBV)Imported
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri10407 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiViruses › Riboviria › Pararnavirae › Artverviricota › Revtraviricetes › Blubervirales › Hepadnaviridae › Orthohepadnavirus
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section only exists in viral entries and indicates the host(s) either as a specific organism or taxonomic group of organisms that are susceptible to be infected by a virus.<p><a href='/help/virus_host' target='_top'>More...</a></p>Virus hostiHomo sapiens (Human) [TaxID: 9606]
Pan troglodytes (Chimpanzee) [TaxID: 9598]

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family%5Fand%5Fdomains%5Fsection">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini357 – 600Reverse transcriptaseInterPro annotationAdd BLAST244

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni1 – 177Terminal protein domain (TP)UniRule annotationAdd BLAST177
Regioni178 – 346SpacerUniRule annotationAdd BLAST169
Regioni190 – 211DisorderedSequence analysisAdd BLAST22
Regioni293 – 316DisorderedSequence analysisAdd BLAST24
Regioni347 – 690Polymerase/reverse transcriptase domain (RT)UniRule annotationAdd BLAST344

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes the position of regions of compositional bias within the protein and the particular amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi191 – 211PolarSequence analysisAdd BLAST21

<p>This subsection of the 'Family and domains' section provides general information on the biological role of a domain. The term 'domain' is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

Terminal protein domain (TP) is hepadnavirus-specific. Spacer domain is highly variable and separates the TP and RT domains. Polymerase/reverse-transcriptase domain (RT) and ribonuclease H domain (RH) are similar to retrovirus reverse transcriptase/RNase H.UniRule annotation
The polymerase/reverse transcriptase (RT) and ribonuclease H (RH) domains are structured in five subdomains: finger, palm, thumb, connection and RNase H. Within the palm subdomain, the 'primer grip' region is thought to be involved in the positioning of the primer terminus for accommodating the incoming nucleotide. The RH domain stabilizes the association of RT with primer-template.UniRule annotation

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the hepadnaviridae P protein family.UniRule annotationARBA annotation

Family and domain databases

HAMAP database of protein families

More...HAMAPi		MF_04073, HBV_DPOL, 1 hit

Integrated resource of protein families, domains and functional sites

More...InterProi		View protein in InterPro
IPR043502, DNA/RNA_pol_sf
IPR001462, DNApol_viral_C
IPR000201, DNApol_viral_N
IPR037531, HBV_DPOL
IPR000477, RT_dom

Pfam protein domain database

More...Pfami		View protein in Pfam
PF00336, DNA_pol_viral_C, 1 hit
PF00242, DNA_pol_viral_N, 1 hit
PF00078, RVT_1, 1 hit

Superfamily database of structural and functional annotation

More...SUPFAMi		SSF56672, SSF56672, 1 hit

PROSITE; a protein domain and family database

More...PROSITEi		View protein in PROSITE
PS50878, RT_POL, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

A0A3G3C4E2-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MPLSYQHFRK LVLLDDEAGP LEEELPRLAD EGLNRRVAED LNLGDLNVSI 
        60         70         80         90        100
PWTHKVGNFT GLYSSTVPVF NPDWQTPSFP HIHLKEDIIQ RCQQYVGPLT 
       110        120        130        140        150
VNEKRRLKLI MPARFYPNRT KYLPLDKGIK PYYPEHTVNH YFQTRHYLHT 
       160        170        180        190        200
LWKAGILYKR ETTRSASFCG SPYSWEQELQ HGRLDFQTST RHGDESFCSQ 
       210        220        230        240        250
SSGILSRSPV GPGIRSQFKQ SRLGLQSQQG SMASGTPGRS GILRARVHST 
       260        270        280        290        300
TRQSFGVEPS GSGHIDNSTS SASYCLHQSA VRKTAYSHLS TSKRQSSSGH 
       310        320        330        340        350
AVELQHIPPS SARSQSEGPI LSCWWLQFRN SKPCSDYCLS HIVNLLEDWG 
       360        370        380        390        400
PCTEHGEHHI RIPRTPARVT GGVFLVDKNP NNTTESRLVV DFSQFSRGST 
       410        420        430        440        450
QVSWPKFAVP NLQSLTNLLS SNLSWLSLDV SAAFYHLPLH PAAMPHLLVG 
       460        470        480        490        500
SSGLPRYVAR LSSDARNINH QHGTMQDLHD SCSRNLYISL LLLYKTYGWK 
       510        520        530        540        550
LHLYSHPIIL GFRKIPMGVG LSPFLLAQFT SAICSVVRRA FPHCLAFSYM 
       560        570        580        590        600
DDVVLGAKSV QHLESLFTAV TNFLLSLGIH LNPNKTKRWG YSLNFMGYVI 
       610        620        630        640        650
GSWGTLPQEH IVHKIKQCFR KLPTNRPIDW KVCQRIVGLL GFAAPFTQCG 
       660        670        680        690        700
YPALMPLYAC IQAKRAFTFS RTYKTFLCQQ YLNLYPVARQ RSGLCQVFAD 
       710        720        730        740        750
ATPTGWGLAI GHQRMRGTFV APLPIHTAEL LAACFARSRS GAKLIGTDNS 
       760        770        780        790        800
VVLSRKYTSF PWLLGCAANW ILRGTSFVYV PSALNPADDP SRGRLGIYRP 
       810        820        830        840 
LLRLPFRPTT GRTSLYAVSP SVPSHLPDRV HFASPLHVAW RPP
Length:843
Mass (Da):94,638
Last modified:February 13, 2019 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iBECF1001E8760A63
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...EMBLi

GenBank nucleotide sequence database

More...GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...DDBJi
Links Updated
MG571359 Genomic DNA Translation: AYP71632.1

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
MG571359 Genomic DNA Translation: AYP71632.1

3D structure databases

Database of comparative protein structure models

More...ModBasei		Search...

SWISS-MODEL Interactive Workspace

More...SWISS-MODEL-Workspacei		Submit a new modelling project...

Family and domain databases

HAMAPiMF_04073, HBV_DPOL, 1 hit
InterProiView protein in InterPro
IPR043502, DNA/RNA_pol_sf
IPR001462, DNApol_viral_C
IPR000201, DNApol_viral_N
IPR037531, HBV_DPOL
IPR000477, RT_dom
PfamiView protein in Pfam
PF00336, DNA_pol_viral_C, 1 hit
PF00242, DNA_pol_viral_N, 1 hit
PF00078, RVT_1, 1 hit
SUPFAMiSSF56672, SSF56672, 1 hit
PROSITEiView protein in PROSITE
PS50878, RT_POL, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...ProtoNeti		Search...

MobiDB: a database of protein disorder and mobility annotations

More...MobiDBi		Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiA0A3G3C4E2_HBV
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: A0A3G3C4E2
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/TrEMBL: February 13, 2019
Last sequence update: February 13, 2019
Last modified: February 10, 2021
This is version 10 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiUnreviewed (UniProtKB/TrEMBL)
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