Description of Fuselloviridae
adapted from
ICTVdb
Virion Properties
Morphology
Virions consist of an
envelope and a nucleocapsid. Virus capsid is enveloped. Virions
are lemon-shaped; flexible and have protrusions that extending
through the envelope. Short tail-like fibers are attached to one
pole. Virions measure 60 nm in diameter; 100 nm in length.
Virion populations are comprised of populations in which some
particles are of different sizes; some particles are 1 percent;
some particles are larger; the length is about 300 nm.
Physicochemical and Physical Properties
Virions have a buoyant density in
CsCl of 1.24 g cm
-3.
Nucleic Acid
The genome is not segmented and contains a single
molecule of circular; positively supercoiled, double-stranded
DNA. The complete genome is 15500 nucleotides long.
Proteins
The viral genome encodes structural
proteins.
Lipids
Lipids are present and located in the
envelope. Virions are composed of 10% lipids by weight (which
forms the coat and is of host origin). The composition of viral
lipids and host cell membranes are similar. The lipids are of
host origin and are derived from host cell membranes. Proteins of
host derived membranes have been modified during
post-translational processes. Host-derived membranes contain two
virus-encoded proteins and DNA-associated protein.