Plays an essential role in viral DNA replication. Binds to ssDNA with high affinity and localizes to cytoplasmic factories where nascent viral genomes accumulate. May disrupt loops, hairpins and other secondary structures present on ssDNA to reduce and eliminate pausing of viral DNA polymerase at specific sites during elongation. Homoomultimer (Potential). Interacts with the small subunit of ribonucleotide reductase. Localizes in cytoplasmic virus factories, where it is associated with viral DNA. Expressed in the early phase of the viral replicative cycle. This protein is synthesized in the early as well as at the intermediate time of infection. Belongs to the chordopoxvirinae I3 family.