Recombinant Human papillomavirus type 16 Regulatory protein E2(E2)

Plays an accessory role in initiation of DNA replication. A dimer of E2 interacts with a dimer of E1 in order to improve specificity of E1 DNA binding activity. Once the complex recognizes and binds DNA at specific sites, the E2 dimer is roved from DNA. E2 also regulates viral transcription through binding to the E2RE response elent (5'-ACCNNNNNNGGT-3') present in multiple copies in the regulatory regions of the viral genome. Activates or represses transcription depending on E2RE's position with regards to proximal promoter elents including the TATA-box. Repression occurs by sterically hindering the assbly of the transcription initiation complex.