Structure and genome[edit]
Hepatitis delta virus delta antigen
PDB 1a92 EBI.jpg
oligomerization domain of hepatitis delta antigen
Identifiers
Symbol HDV_ag
Pfam PF01517
InterPro IPR002506
SCOP 1a92
SUPERFAMILY 1a92
[show]Available protein structures:
The HDV is a small, spherical virus with a 36 nm diameter. It has an outer coat containing three HBV envelope proteins (called large, medium, and small hepatitis B surface antigens), and host lipids surrounding an inner nucleocapsid. The nucleocapsid contains single-stranded, circular RNA of 1679 nucleotides and about 200 molecules of hepatitis D antigen (HDAg) for each genome. The central region of HDAg has been shown to bind RNA.[3] Several interactions are also mediated by a coiled-coil region at the N terminus of HDAg.[4] The hepatitis D circular genome is unique to animal viruses because of its high GC nucleotide content. The HDV genome exists as an enveloped, negative sense, single-stranded, closed circular RNA. Its nucleotide sequence is 70% self-complementary, allowing the genome to form a partially double-stranded, rod-like RNA structure.[5] With a genome of approximately 1700 nucleotides, HDV is the smallest "virus" known to infect animals. It has been proposed that HDV may have originated from a class of plant pathogens called viroids, which are much smaller than viruses.[6][7]
Structure and genome[edit]Hepatitis delta virus delta antigenPDB 1a92 EBI.jpgoligomerization domain of hepatitis delta antigenIdentifiersSymbol HDV_agPfam PF01517InterPro IPR002506SCOP 1a92SUPERFAMILY 1a92[show]Available protein structures:The HDV is a small, spherical virus with a 36 nm diameter. It has an outer coat containing three HBV envelope proteins (called large, medium, and small hepatitis B surface antigens), and host lipids surrounding an inner nucleocapsid. The nucleocapsid contains single-stranded, circular RNA of 1679 nucleotides and about 200 molecules of hepatitis D antigen (HDAg) for each genome. The central region of HDAg has been shown to bind RNA.[3] Several interactions are also mediated by a coiled-coil region at the N terminus of HDAg.[4] The hepatitis D circular genome is unique to animal viruses because of its high GC nucleotide content. The HDV genome exists as an enveloped, negative sense, single-stranded, closed circular RNA. Its nucleotide sequence is 70% self-complementary, allowing the genome to form a partially double-stranded, rod-like RNA structure.[5] With a genome of approximately 1700 nucleotides, HDV is the smallest "virus" known to infect animals. It has been proposed that HDV may have originated from a class of plant pathogens called viroids, which are much smaller than viruses.[6][7]
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