We examine the role of cis-acting sequences of the viral promoters in IEP-mediated trans-activation.
The IEP trans-activated the viral promoters in a TATA motif-dependent manner.
The IEP efficiently trans-activated the promoters lacking the IEP-binding sequences (IEBS).
IEP-mediated full trans-activation requires a consensus TATA box of core promoters, but not its cognate sequence binding.