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. 1984 Dec;81(24):7782-6.
doi: 10.1073/pnas.81.24.7782.

alpha-Amanitin-insensitive transcription of mouse beta major-globin 5'-flanking and structural gene sequences correlates with mRNA expression

D P Carlson, J Ross

alpha-Amanitin-insensitive transcription of mouse beta major-globin 5'-flanking and structural gene sequences correlates with mRNA expression

D P Carlson et al. Proc Natl Acad Sci U S A. 1984 Dec.

Abstract

A small proportion of the RNAs of mouse reticulocytes consists of beta major-globin mRNA sequences linked to sequences transcribed from the 5'-flanking region of the beta major-globin gene. These upstream RNAs are polyadenylylated and contain 700-800 nucleotides, and their 5' regions are heterogeneous. RNAs with similar or identical 5' regions are transcribed in cell-free extracts from a circular mouse beta major-globin gene template. Synthesis of most of the upstream RNAs in vitro is not inhibited by low levels (1 microgram/ml) of alpha-amanitin, indicating that they are transcribed by an enzyme(s) different from RNA polymerase II. During culture of mouse erythroleukemia cells with dimethyl sulfoxide, globin mRNA and upstream RNAs accumulate with similar kinetics. In contrast, upstream RNAs are not detected in hemin-treated cells.

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