Early protein responsible for decreasing host DNA gyrase activity. Promotes DNA relaxation of bacterial host genome. Modulates the expression of various host genes probably controlled by supercoiling of their promoters. Host genes affected include DNA replication and cell division determinants. Homodimer. This protein is constitively expressed from the Pgem promoter unlike most other early proteins which are expressed under the control of the Pe promoter. Its expression seems to escape repression by repressor protein c and thus occurs throughout latency (Probable). Belongs to the mulikevirus gemA protein family. Extended N-terminus.