Viruses in
Marseillevirus have icosahedral geometries. The diameter is around 250 nm. The genome has 457 open reading frames and is circular. The genome has a length of 368 kb, with a G+C content of 44.73%. It encodes a minimum of 49
proteins. The
genome of the
virus includes typical
NCLDV core
genes and genes apparently obtained from
eukaryotic hosts and their
parasites or
symbionts, both
bacterial and
viral, through probably
horizontal gene transfer mechanism. ==Life cycle==