In vitro DNA dependent synthesis of globin RNA sequences from erythroleukemic cell chromatin.

Abstract:

:Murine erythroleukemic cells in culture accumulate cytoplasmic globin mRNA during differentiation induced by dimethyl sulfoxide (DMSO)1. Chromatin was prepared from DMSO induced erythroleukemic cells that were transcribing globin RNA in order to determine whether in vitro synthesis of globin RNA sequences was possible from chromatin. RNA was synthesized in vitro using 5-mercuriuridine triphosphate and exogenous Escheria coli RNA polymerase. Newly synthesized mercurated RNA was purified from endogenous chromatin associated RNA by affinity chromatography on a sepharose sulfhydryl column, and the globin RNA sequence content of the mercurated RNA was assayed by hybridization to cDNA globin. The synthesis of globin RNA sequences was shown to occur and to be sensitive to actinomycin and rifampicin and insensitive to alpha-amanitin. In contrast, synthesis of globin RNA sequence synthesis was not detected in significant amounts from chromatin prepared from uninduced erythroleukemic cells, nor from uninduced cell chromatin to which globin RNA was added prior to transcription. Isolated RNA:cDNA globin hybrids were shown to contain mercurated RNA by affinity chromatography. These results indicated that synthesis of globin RNA sequences from chromatin can be performed by E. coli RNA polymerase.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Reff ME,Davidson RL

doi

10.1093/nar/6.1.275

subject

Has Abstract

pub_date

1979-01-01 00:00:00

pages

275-87

issue

1

eissn

0305-1048

issn

1362-4962

journal_volume

6

pub_type

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