Plays an important role in the cytoplasmic envelopment of tegument proteins and capsids during the assembly and egress processes. Participates also in viral entry at the fusion step probably by regulating the core fusion machinery. Virion membrane-associated tegument protein. Associates with host membrane lipids rafts. During virion morphogenesis, this protein probably accumulates in the endosomes and trans-Golgi where secondary envelopment occurs. It is probably transported to the cell surface from where it is endocytosed and directed to the trans-Golgi network (TGN). The PsHV-1 UL11 is much shorter than the other family members. Belongs to the herpesviridae HHV-1 UL11 family.