Structural protein required for transport of intracellular particles from the assembly sites to the plasma membrane (PubMed:11435554). Binds to both ssDNA and dsDNA (PubMed:9123862). Suppressed the activation of the cGAS/STING pathway by interfering with the recruitment of IRF3 to TBK1, which in turn suppresses IRF3 phosphorylation, decreasing interferon production (PubMed:34190598). Interacts with the major capsid protein (PubMed:11435554). Interacts with host IRF3; this interaction interfers with the recruitment of IRF3 to TBK1 (PubMed:34190598). Localizes at the surface of the intracellular virion. Expressed in the late phase of the viral replicative cycle. Acetylated. Belongs to the asfivirus structural protein p14.5 family.