Full genome sequence analysis of a novel adenovirus from a captive polar bear (Ursus maritimus).

•Novel mastadenovirus found in captive polar bear in Budapest Zoo.•Full sequence was determined using primer walking method.•All genus-common genes present except the one of protein pIX.•Four novel ORFs found in E3 and E4 regions with no homology to any known sequence.•Phylogenetic calculations show that virus may represent coevolution with carnivores.