This family consists of various coat proteins from the Ilarviruses which belong to the Bromoviridae, members include Apple mosaic virus and Prune dwarf virus. The Ilarvirus coat protein is required to initiate replication of the viral genome in host plants []. Members of the Bromoviridae have a positive stand ssRNA genome with no DNA stage in their replication.
DHH phosphoesterase superfamily includes manganese-dependent inorganic pyrophosphatase (family II), Drosophila prune protein and bacterial RecJ exonuclease []. Typically, its members consist of two non-similar domains:domain 1 with parallel sheet of 6 strands and domain 2 with mixed sheet of 5 strands.
This is a domain of predicted phosphoesterases, including Drosophila prune protein and bacterial RecJ exonuclease []. The RecJ protein of Escherichia coli plays an important role in a number of DNA repair and recombination pathways. RecJ catalyzes processive degradation of single-stranded DNA in a 5'-to-3' direction. Sequences highly related to those encoding RecJ can be found in many of the eubacterial genomes sequenced to date [].
