Transcriptional activator of phage phi 29 late promoter: mapping of residues involved in interaction with RNA polymerase and in DNA bending.


Phage phi 29 regulatory protein p4 activates transcription from the late A3 promoter by stabilizing sigma A-RNA polymerase at the promoter as a closed complex. Activation requires interaction between both proteins. Protein p4 bends the DNA upon binding. We have performed a detailed mutagenesis study of the carboxyl end of the protein, which is involved in… (More)


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