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J Virol. 1972 April; 9(4): 621-626
Copyright © 1972 American Society for Microbiology. All Rights Reserved.

Transcription of the Adenovirus Genome by an -Amanitine-Sensitive Ribonucleic Acid Polymerase in HeLa Cells

¹ Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

ABSTRACT

The properties of the ribonucleic acid (RNA) polymerase activity which transcribes the major portion of the adenovirus genome were studied. Nuclei were prepared from infected cells and incubated in vitro. Virus-specific RNA was determined by hybridization to adenovirus deoxyribonucleic acid (DNA). Adenovirus DNA is transcribed principally by an activity which resembles closely polymerase II of the host cell. This activity is inhibited by -amanitine and stimulated by (NH₄)₂SO₄. Its product is high-molecular-weight heterogeneous RNA. The polymerase activity measured early in infection (3 to 5 hr) resembles that found late in infection (16 to 18 hr).