HBEAG_HPBDW
ID HBEAG_HPBDW Reviewed; 305 AA.
AC P17191;
DT 01-AUG-1990, integrated into UniProtKB/Swiss-Prot.
DT 01-MAY-1991, sequence version 2.
DT 03-AUG-2022, entry version 65.
DE RecName: Full=External core antigen;
DE AltName: Full=HBeAg;
DE AltName: Full=Precore protein;
DE Flags: Precursor;
GN Name=C;
OS Duck hepatitis B virus (isolate white Shanghai duck S31) (DHBV).
OC Viruses; Riboviria; Pararnavirae; Artverviricota; Revtraviricetes;
OC Blubervirales; Hepadnaviridae; Avihepadnavirus.
OX NCBI_TaxID=10440;
OH NCBI_TaxID=8835; Anas (ducks).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=2596031; DOI=10.1016/0042-6822(89)90571-0;
RA Uchida M., Esumi M., Shikata T.;
RT "Molecular cloning and sequence analysis of duck hepatitis B virus genomes
RT of a new variant isolated from Shanghai ducks.";
RL Virology 173:600-606(1989).
CC -!- FUNCTION: May regulate immune response to the intracellular capsid in
CC acting as a T-cell tolerogen, by having an immunoregulatory effect
CC which prevents destruction of infected cells by cytotoxic T-cells.
CC {ECO:0000250}.
CC -!- SUBUNIT: Homodimerizes. {ECO:0000250}.
CC -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
CC -!- ALTERNATIVE PRODUCTS:
CC Event=Alternative initiation; Named isoforms=2;
CC Name=External core antigen;
CC IsoId=P17191-1; Sequence=Displayed;
CC Name=Capsid protein;
CC IsoId=P0C6K2-1; Sequence=External;
CC -!- SIMILARITY: Belongs to the avihepadnavirus precore antigen family.
CC {ECO:0000305}.
CC -!- SEQUENCE CAUTION:
CC Sequence=AAA45750.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR EMBL; M32991; AAA45750.1; ALT_INIT; Genomic_DNA.
DR PIR; F33746; NKVLWD.
DR SMR; P17191; -.
DR Proteomes; UP000007558; Genome.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0005198; F:structural molecule activity; IEA:InterPro.
DR Gene3D; 1.10.4090.10; -; 2.
DR InterPro; IPR002006; Hepatitis_core.
DR InterPro; IPR036459; Viral_capsid_core_dom_sf_HBV.
DR Pfam; PF00906; Hepatitis_core; 1.
DR SUPFAM; SSF47852; SSF47852; 1.
PE 3: Inferred from homology;
KW Alternative initiation; Host-virus interaction; Reference proteome;
KW Secreted; Signal; Viral immunoevasion.
FT SIGNAL 1..19
FT /evidence="ECO:0000255"
FT CHAIN 20..272
FT /note="External core antigen"
FT /id="PRO_0000222305"
FT PROPEP 273..305
FT /evidence="ECO:0000250"
FT /id="PRO_0000324685"
FT REGION 226..305
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 249..263
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 264..278
FT /note="Basic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT SITE 272..273
FT /note="Cleavage; by host"
FT /evidence="ECO:0000250"
SQ SEQUENCE 305 AA; 34929 MW; 3946D3FE7BE5E61E CRC64;
MWNLRITPLS FGAACQGIFT STLLLSALTV PLVCTIVYDS CLYMDINASR ALANVYDLPD
DFFPKIDDLV RDAKDALEPY WKSDSIKKHV LIATHFVDLI EDFWQTTQGM HEIAESLRAV
IPPTTAPVPT GYLIQHEEAE EIPLGDLFKH QEERIVSFQP DYPITARIHA HLKAYAKINE
ESLDRARRLL WWHYNCLLWG EANVTNYISR LRTWLSTPEK YRGRDAPTIE AITRPIQVAQ
GGRKTSSGTR KPRGLEPRRR KVKTTFVYGR RRSKSRERRA PSPQRAGSPL PRSSSSHHRS
PSPRK