Descriptions are
generated automatically from the ICTVdB database including links. Some
descriptions are only very basic and links may point to documents that are not
yet published on the Web.
00.030.0.02.001. Duck
hepatitis B virus
Cite this publication as: ICTVdB Management
(2006). 00.030.0.02.001. Duck hepatitis B virus. In: ICTVdB - The Universal
Virus Database, version 4. Büchen-Osmond, C. (Ed), Columbia University,
New York, USA
Cite this site as: ICTVdB - The Universal Virus
Database, version 4.
http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/
This is a description of a
vertebrate virus at the species level.
ICTVdB Virus Code: 00.030.0.02.001. Virus accession number:
30002001. Obsolete virus code: 30.0.2.0.001; superceded accession number:
30020001.
NCBI Taxon Identifier NCBI Taxonomy ID:
12639.
Name, Synonyms and Lineage
ICTV approved
acronym: DHBV. Virus is the type of the genus
00.030.0.02.
Avihepadnavirus in the family
00.030.
Hepadnaviridae.
Virions consist of an envelope and a nucleocapsid. Virus
capsid is enveloped by a detergent sensitive lipoprotein (7 nm).
Virions are spherical to pleomorphic (at times, filamentous forms occur and
spherical structures that lack cores are common (HBsAg particles). Virions
measure 40-48 nm in diameter, or 22 nm in diameter (for
the HBsAg particles of variable length). The envelope has no surface
projections. Capsid/nucleocapsid is round and exhibits
icosahedral symmetry. The nucleocapsid is isometricand
has a diameter of 30-35 nm. The capsid surface structure frequently reveals
a regular pattern with distinctive features (concentric rings). The capsid
consists of 180 capsomers.
Incomplete particles are common.
The
genome is not segmented and contains a single molecule of circular. The
genome is -RT. The genome is partially double-stranded DNA
that forms a covalently closed circle (with 5' end of the full length minus
strand which is linked to the viral DNA polymerase). The complete genome is
3021-3037 nucleotides long, is fully sequenced. Sequence has the
accession number
[K01834];
[X60213], and the NCBI reference genome has the accession
number
[NC_001344]. The genome has a guanine + cytosine content
of 48 %. The genome sequence has termini with cohesive ends (that match the
uniquely located 5'-ends of the two strands which overlap by approximately
50 nucleotides and maintain the circular configuration of the DNA). The
negative-sense or non-coding strand (complementary to the viral mRNA) is
full-length; positive sense strand (the viral mRNA) is shorter than full-length. The positive sense strand (the
viral mRNA) is shorter than full-length and stops at a unique site on full
length negative strand opposite at a position 50 nucleotides
downstream from the 5' end of the positive sense strand. The 5'-end of the
negative-sense strand has a covalently attached terminal protein. The positive-sense
strand has a 5' capped oligoribonucleotide primer. The 3'-terminus has
conserved nucleotide sequences of 1 nucleotides in length.
GenBank records for
nucleotide sequences;
complete genome sequences.
The viral
genome encodes structural proteins and non-structural proteins located
in the envelope and capsid.
Non-Structural Proteins: The virus codes for an RNA-dependent
DNA polymerase.
Lipids are
present and located in the envelope and empty particles (HBsAG
components). The composition of viral lipids is known. The composition of viral
lipids and host cell membranes are similar. The lipids are derived from a host
membrane compartment intermediate between and are derived from
endoplasmatic reticulum membranes and Golgi membranes. Viral membranes include
phospholipids, cholesterol, cholesterol esters, and triglycerides.
Translation: Replication involves a
reverse transcription step.
Natural Host
Virus infects during its life cycle a single type of vertebrate host.
Domain
Viral hosts belong to the Domain Eucarya.
Domain Eucarya
Kingdom Animalia.
Kingdom Animalia
Phylum Chordata.
Phylum Vertebrata
Subphylum Vertebrata.
Class Aves.
Class Aves Order Anseriformes; virus infects
Anatidae.
Virus infects Anas (duck).
List of Strains and
Isolates in the Species
00.030.0.02.001.00.002. Duck hepatitis B virus, isolate DHBV22
00.030.0.02.001.00.003. Duck hepatitis B virus, isolate DHBV26
00.030.0.02.001.00.004. Duck hepatitis B virus, Chinese duck isolate
00.030.0.02.001.00.005. Duck hepatitis B virus, isolate DHBV-S5
00.030.0.02.001.00.006. Duck hepatitis B virus, isolate DHBV-S31
00.030.0.02.001.00.007. Duck hepatitis B virus, isolate P2-3
00.030.0.02.001.00.008. Duck hepatitis B virus, isolate DHBVQCA34.
The
following generic references are cited in the most recent ICTV Report.
PubMed References.
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